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lowest cost of chitosan-g-poly acrylamide

  • Synthesis of magnetic carboxymethyl chitosan- g

    2015-5-29 · Then, the magnetic hydrogel nanocomposites of carboxymethyl chitosan-g-poly(acrylamide) were prepared by incorporation of magnetic laponite RD. The structure of magnetic nanocomposite hydrogels was characterized by scanning electron microscopy (SEM), transmittance electron microscopy (TEM), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and vibrating sample …

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  • Preparation and properties of quaternary ammonium

    2017-2-1 · Quaternary ammonium chitosan-g-poly(acrylic acid-co-acrylamide) superabsorbent hydrogels were successfully synthesized from acrylic acid (AA), acrylamide (AM) and quaternary ammonium chitosan with high substitution degree.They were prepared using potassium persulfate (KPS) as an initiator and N,N′-methylenebisacrylamide (MBA) as a crosslinker respectively.

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  • Environmental-sensitive chitosan- g -polyacrylamide ...

    2015-9-4 · Superabsorbent composites made of chitosan-graft-polyacrylamide and carboxymethylcellulose (CTS-g-PAAm/CMC) were prepared through free radical graft copolymerization of acrylamide (AAm) onto chitosan backbone, and the obtained superabsorbents were also partially hydrolyzed. The formation of the grafted network was evidenced by attenuated total reflectance …

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  • Synthesis and characterization of chitosan- g

    2019-11-7 · In order to cope with this problem, CS has been modified to enhance its interactions with bacterial membrane and exalt its antimicrobial potency. In this respect, He et al. have recently explored the bactericide potentialities of quaternary ammonium chitosan-g-poly(acrylic acid-co-acrylamide) superabsorbent hydrogels as potential bactericide.

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  • Synthesis, characterization of acrylamide grafted

    2011-1-10 · So, it is evident that grafting acrylamide onto chitosan could enhance the stability of pure chitosan at higher temperature. Fig. 5 shows the DSC thermograms of pure chitosan (A) and AGC (B). The first endothermic peak in (A) at 102.2 °C is the glass transition temperature (T g) of chitosan.

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  • Chitosan-based hydrogels: From preparation to

    2018-9-15 · More recently, Zhang and co-authors reported a series of chitosan-based self-healing hydrogels, using a benzaldehyde terminated poly (ethylene glycol), to crosslink chitosan or chitosan derivatives by Schiff base (Li, Wang, Wei, & Tao, 2017; Zhang, Tao, Li, & Wei, 2011). Focusing on the tissue engineering, the advantage of using Schiff-base system is complete avoidance of extraneous …

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  • Chitosan-based hydrogels: Preparation, properties

    2018-8-1 · Thus, the FT-IR spectra confirmed that the quaternary ammonium CS-g-poly(acrylic acid-co-acrylamide) superabsorbent hydrogels were successfully prepared . Thermogravimetric analysis (TGA) and differential scanning calorimeter (DSC) thermograms of HACC and superabsorbent hydrogel revealed that the first weight loss was occurred at around 100 °C ...

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  • Synthesis, characterization and absorption study of ...

    2020-4-9 · FESEM analysis is used to detect the surface morphology of the chitosan-g-(acrylamide-c-itaconic acid). Surface morphology of the synthesized hydrogel and chitosan compared using different magnifications in Fig. 4a, c, e, g represents the chitosan structure and Fig. 4b, d, f, h are related to synthesized hydrogel. As can be seen in the figures, chitosan surface shows a smooth flakes …

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  • Enhancing the porous structure of swellable

    2021-1-1 · Acrylic acid (AA), acrylamide (AM), ammonium persulfate (APS), sodium bisulfite (NaHSO 3), and acetic acid supplied by Fluka, Germany, were used as received with purity ≥ 98.5%. Chitosan flakes with 85% degree of deacetylation and 110 kDa of molecular weight was prepared according to the literature's method . Maleic anhydride, sodium bicarbonate and acetone obtained from Merck, …

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  • Super-hydrophilic/oleophobic chitosan/acrylamide

    2020-5-16 · Oil spills are one of the most serious problems which have a negative effect on our environment especially on the marine ecosystem. Thus, water/oil separation is considered as an important process to eliminate the oily pollutants. In the current study, a super-hydrophilic and super-oleophobic filter was prepared by in situ synthesis of chitosan/acrylamide hydrogel on the cotton fabric …

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  • Chitosan-g-poly(acrylamide)/Diatomite superabsorbent ...

    Chitosan-g-poly(acrylamide)/Diatomite superabsorbent composites: synthesis and investigation of swelling properties T. Benhalima 1 , S. Mounsi 2 , N. Nassima 1 , H. Ferfera-Harrar 1

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  • Hydrogel nanocomposites based on chitosan-g

    Hydrogel nanocomposites based on chitosan-g-polyacrylamide and silver nanoparticles (Cs-g-PAAm/AgNPs) were developed by simple, cost effective, and eco-friendly process at room temperature. First, the hydrogels were prepared via grafting copolymerization and crosslinking of acrylamide (AAm) onto chitosan (Cs) with various weight ratios, using potassium persulfate as initiator and N,N ...

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  • Adsorption Studies for the Removal Heavy Metal by

    2014-12-19 · Chitosan-g-poly (acrylicacid-co-acrylamide) proved to be an effective adsorbent for the removal of different heavy metal ions from aqueous solution. In present research work natural bio polymer “Chitosan” was grafted onto Acrylic acid and Acrylamide and adsorption of some heavy metal studied by batch method.

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  • Fabrication of a novel low-cost superoleophilic

    2019-11-1 · Nonanyl chitosan-g- poly (butyl acrylate) copolymer was prepared as following; a known amount of a dried nonanyl chitosan (NCS; 0.2 g) was dissolved in 20 mL of 2% acetic acid solution at room temperature. 10 mL of ethanol was adding dropwise to the NCS solution under vigorous stirring.

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  • Synthesis, characterization of acrylamide grafted

    2011-1-10 · So, it is evident that grafting acrylamide onto chitosan could enhance the stability of pure chitosan at higher temperature. Fig. 5 shows the DSC thermograms of pure chitosan (A) and AGC (B). The first endothermic peak in (A) at 102.2 °C is the glass transition temperature (T g) of chitosan.

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  • Chitosan-based hydrogels: Preparation, properties

    2018-8-1 · Thus, the FT-IR spectra confirmed that the quaternary ammonium CS-g-poly(acrylic acid-co-acrylamide) superabsorbent hydrogels were successfully prepared . Thermogravimetric analysis (TGA) and differential scanning calorimeter (DSC) thermograms of HACC and superabsorbent hydrogel revealed that the first weight loss was occurred at around 100 °C ...

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  • Water Absorption of Chitosan, Collagen, and Chitosan ...

    2021-7-12 · studied chitosan films containing poly (acrylamide-co-itaconic acid) and found a decrease in water absorption [19]. With 25 kGy gamma-ray applied to collagen/polyglycolic acid blend membranes, Mazor and Zilberman [20] reported that water absorption was reduced from 110% to …

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  • Fabrication of a novel low-cost superoleophilic

    A novel superoleophilic-hydrophobic nonanyl chitosan-poly (butyl acrylate) grafted copolymer was fabricated as a low-cost oil-adsorbent. Chitosan (CS) was coupled with a hydrophobic nonanal (N) to form nonanyl chitosan (NCS) schiff base, and followed by grafting with butyl acrylate monomers (ButA). The grafted copolymer was characterized by FTIR, TGA and SEM tools.

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  • Kinetic and thermodynamic studies for the sorptive

    2020-7-8 · 2.2.2. Preparation of chitosan-poly (butyl acrylate) grafted copolymer CS-g-poly (ButA) copolymer was fabricated regarded to the author’s previous work [20] by dissolving CS (0.2 g) in 2% acetic acid (20 mL) at 25°C followed by dropwise addi-tion of ethanol (10 mL) under vigorous stirring. To the CS solution 0.1 g, KPS dissolved in 50 mL ...

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  • Study on superabsorbent composites XIX. Synthesis ...

    2008-6-21 · A novel chitosan-g-poly (acrylic acid)/unexpanded vermiculite (CTS-g-PAA/UVMT) superabsorbent composite was prepared by graft polymerization among chitosan (CTS), acrylic acid (AA) and unexpanded vermiculite (UVMT) in aqueous solution. The effect of polymerization variables, including the content of crosslinker, initiator and UVMT, the weight ratio of AA to CTS, the reaction …

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  • Chitosan-g-poly (acrylamide)/montmorillonite

    A reliable, efficient and low-cost technique for removing these persistent pollutants from wastewater is the adsorption using bio-based adsorbents such as crosslinked polysaccharides hydrogel materials. In this study, bioadsorbents based on chitosan-g-poly (acrylamide) and montmorillonite (CTSg- PAAm/MMt) hydrogel nanocomposites were prepared ...

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  • Synthesis of Poly(Acrylamide-Graft-Chitosan) Hydrogel ...

    Keywords: Acrylamide, Chitosan, Grafting, Hydrogel, Swelling 1. Introduction Chitosan is derived from chitin by deacetylation using strong alkali. It is a safe polysaccharide and non-toxic. Chitin is a natural linear polysaccharide containing N-acetyl-D-glucosamine units and occupies second place on the earth next to cellulose.

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  • Adsorption Studies for the Removal Heavy Metal by

    Chitosan-g-poly (acrylicacid-co-acrylamide) proved to be an effective adsorbent for the removal of different heavy metal ions from aqueous solution. In present research work natural bio polymer “Chitosan” was grafted onto Acrylic acid and Acrylamide and adsorption …

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  • Photocatalytic degradation of highly toxic dyes using ...

    The photocatalytic degradation of methyl orange (MO) and congo red (CR) dyes from aqueous solution have been attempted using chitosan-g-poly(acrylamide)/ZnS (ChPA/ZS) nanocomposite materials. Nanocomposites were successfully prepared in the aqueous solution through microwave radiations.

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  • Water Absorption of Chitosan, Collagen, and Chitosan ...

    2021-7-12 · studied chitosan films containing poly (acrylamide-co-itaconic acid) and found a decrease in water absorption [19]. With 25 kGy gamma-ray applied to collagen/polyglycolic acid blend membranes, Mazor and Zilberman [20] reported that water absorption was reduced from 110% to …

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  • CompositeHydrogelofPoly(acrylamide)andStarchasPotential ...

    2020-11-16 · ResearchArticle CompositeHydrogelofPoly(acrylamide)andStarchasPotential SystemforControlledReleaseofAmoxicillinandInhibitionof BacterialGrowth AnaV.Torres-Figueroa ...

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  • Chitosan | Sigma-Aldrich

    Product Number Product Description SDS; 220477-M: Chitosanase, Streptomyces sp. N174, CAS 51570-20-8, is a member of a new class of enzymes with antifungal properties. Efficiently catalyzes the hydrolysis of acetylated chitosan (0 to 60%). Pricing

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  • Composite Hydrogel of Poly(acrylamide) and Starch as ...

    2020-11-16 · Ana V. Torres-Figueroa, Cinthia J. Pérez-Martínez, Teresa del Castillo-Castro, Enrique Bolado-Martínez, María A. G. Corella-Madueño, Alejandro M. García-Alegría, Tania E. Lara-Ceniceros, Lorena Armenta-Villegas, ' Composite Hydrogel of Poly(acrylamide) and Starch as Potential System for Controlled Release of Amoxicillin and Inhibition of Bacterial Growth ', Journal of Chemistry,. vol ...

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  • Hydrogels Based on Chitosan and Chitosan

    Chitosan low molecular weight; CAS Number: 9012-76-4; Synonyms: Deacetylated chitin,Poly(D-glucosamine); find Sigma-Aldrich-448869 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich

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  • Advances in chitosan-based superabsorbent

    2017-2-12 · A chitosan solution (2%) was prepared by dissolving 10 g chitosan powder into 500 mL of 10% glacial acetic acid to get the pH of the solution in a range of 4-5. The solution was stirred for 40 hours at RT until a gold colour was obtained. 2.2.2. Preparation of Chitosan-Acrylamide Encapsulated Urea

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  • Silicone Doped Chitosan-Acrylamide Coencapsulated

    2019-2-1 · When the dosage of PFS and CTS was 40 mg/g and 10 mg/g respectively, the lowest moisture content in sludge reduced to 68%. When the dosage of PFS and CTS were 50 mg/g and 10 mg/g respectively, the specific resistance of filtration (SRF) of sludge decreased to 2.08 × 10 12 m/kg.

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  • Study on the effect of chitosan conditioning on sludge ...

    2021-7-6 · Although bentonite was used in a ratio 1:2 or 1:4 compared with the chitosan dosage, its price is considerably lower than the cost of PEI, PDADMAC, and even much more in the case of chitosan and will not affect much the cost efficiency of the whole treatment. The addition of bentonite also improved GCC retention, especially for chitosan (Fig. 13).

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  • Efficiency of chitosan and their combination with ...

    Chitosan as an effective low-cost sorbent of heavy metal complexes with the polyaspartic acid. Download. Chitosan as an effective low-cost sorbent of heavy metal complexes with the polyaspartic acid. Dorota Kołodyńska. Related Papers. Adsorption characteristics of chitosan modified by chelating agents of a new generation.

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  • (PDF) Chitosan as an effective low-cost sorbent of

    2019-7-30 · the cost-e†ective calculation method, when the added amount of chitosan, polyaluminum chloride, and modiˆed rectorite was 1 drop, 0.10ml, and 0.50ml, respectively, the cost-e†ectiveratioisthehighest,itsvalueis5807.55,thecost is 0.01653272 yuan per ton of water, and the turbidity re-movalrateis96.01%.Inaddition,whentheaddedamountof

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  • ApplicationofChitosanCompositeFlocculantinTap

    Toughened chitosan-based composite membranes with antibiofouling and antibacterial properties via incorporation of benzalkonium chloride†. Fitri Khoerunnisa a, Chintia Kulsum a, Fitri Dara b, Mita Nurhayati a, Nisa Nashrah c, Siti Fatimah c, Amelinda Pratiwi a, Hendrawan Hendrawan a, Muhamad Nasir b, Young Gun Ko c, Eng-Poh Ng d and Pakorn Opaprakasit * e a Department of Chemistry, …

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  • Toughened chitosan-based composite membranes

    2021-3-17 · Viral infections, in addition to damaging host cells, can compromise the host immune system, leading to frequent relapse or long-term persistence. Viruses have the capacity to destroy the host cell while liberating their own RNA or DNA in order to replicate within additional host cells. The viral life cycle makes it challenging to develop anti-viral drugs. Nanotechnology-based approaches have ...

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  • Overview of Electrospinned Chitosan Nanofiber

    Fighting bacterial resistance is one of the concerns in modern days, as antibiotics remain the main resource of bacterial control. Data shows that for every antibiotic developed, there is a microorganism that becomes resistant to it. Natural polymers, as the source of antibacterial agents, offer a new way to fight bacterial infection. The advantage over conventional synthetic antibiotics is ...

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  • Chitosan low molecular weight | 9012-76-4

    Chitosan low molecular weight; CAS Number: 9012-76-4; Synonyms: Deacetylated chitin,Poly(D-glucosamine); find Sigma-Aldrich-448869 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich

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  • Efficiency of chitosan and their combination with ...

    2021-7-6 · Although bentonite was used in a ratio 1:2 or 1:4 compared with the chitosan dosage, its price is considerably lower than the cost of PEI, PDADMAC, and even much more in the case of chitosan and will not affect much the cost efficiency of the whole treatment. The addition of bentonite also improved GCC retention, especially for chitosan (Fig. 13).

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  • Hydrosoluble, UV-crosslinkable and injectable chitosan

    2016-2-26 · Hydrosoluble, UV-crosslinkable and injectable chitosan for patterned cell-laden microgel and rapid transdermal curing hydrogel in vivo Baoqiang Lia,b,⇑, Lei Wanga, Feng Xuc,d, Xiaomin Ganga, Utkan Demircie, Daqing Weia, Ying Lif,g, Yujie Fenga, Dechang Jiaa, Yu Zhoua a Institute for Advanced Ceramics, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of ...

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  • Functional Chitosan Derivative and Chitin as ...

    2021-5-2 · Briefly, first a determinate weight of chitosan (0.5 g) was stirred in 50 mL of 1% acetic acid solution. After dissolution, Ce (IV) (0.2 g in HNO3 (10 mL; 0.2 M) was added drop-wise over a period of 10 min under N2 atmosphere for the initiation of the free radical reaction. Then, acrylamide (1 g in 10 mL

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  • In vitro–in vivo evaluation of chitosan-PLGA

    2019-9-4 · Chitosan is a naturally occurring linear amino polysaccharide (poly 1, 4-day-glucoamine) which can be obtained from crustacea shells, insects cuticles, and cell walls of some fungi. 19 Chitosan is an interesting biomaterial for entrapment of bioactive materials in nanoparticulate delivery systems due to its water solubility under acidic ...

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  • Surface Molecularly Imprinted Polymer of Chitosan

    2016-2-19 · Characterization of the MIP-CS-g-PMMA FT IR analysis. Figure 2 showed the IR spectra of chitosan and MIP-CS-g-PMMA. The strong peaks at 3434 …

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  • Hydrogels Based on Chitosan and Chitosan

    2019-5-15 · Chitosan is mainly a linear polysaccharide composed of glucopyranose units. It is a derivative obtained by deacetylation of chitin. It has a wide range of sources, low cost and good biocompatibility, and is widely used in the food, pharmaceutical and medical industries [7,8].

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  • Preparation of aminated chitosan microspheres by

    2020-8-16 · Subsequently, AM (3.55 g, 0.05 mol) and APTAC (3.45 g, 0.0167 mol) as 75 wt% solution were added. TEMED (0.0516 g, 0.444 mmol) was added and the mixture was cooled with an ice bath and purged with nitrogen for 30 min. Then, APS (0.101 g, 0.444 mmol) was dissolved in deionized water (2 g) and added to the mixture to initiate the polymerization.

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  • Desalination of Seawater Using Cationic

    Chitosan coating is beneficial to maintaining the storage quality and prolonging the shelf life of postharvest fruits and vegetables, which is always used as the carrier film for the antimicrobial agents. This review focuses on the preparation, property, mechanism, and application effectiveness on the fruits and vegetables of chitosan-based coating with antimicrobial agents.

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  • Fabrication of a novel low-cost superoleophilic

    2019-11-1 · A novel superoleophilic-hydrophobic nonanyl chitosan-poly (butyl acrylate) grafted copolymer was fabricated as a low-cost oil-adsorbent. Chitosan (CS) was coupled with a hydrophobic nonanal (N) to form nonanyl chitosan (NCS) schiff base, and followed by grafting with butyl acrylate monomers (ButA).

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  • Synthesis and characterization of carboxymethyl

    2019-3-27 · Mahdavinia G R, Pourjavadi A, Hosseinzadeh H and Zohuriaan M J 2004 Modified chitosan 4. Superabsorbent hydrogels from poly (acrylic acid-co-acrylamide) grafted chitosan with salt-and pH-responsiveness properties Eur. Polym. J 40 1399–407. Crossref Google Scholar

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  • Preparation and application of magnetic chitosan in ...

    Additionally, magnetic-chitosan beads with silica were functionalized for the extraction of arsenic from water, since silica deposition improves the stability of the chitosan. 98 Magnetic chitosan beads adsorption efficiency was measured as 0.082 mg/g and according to the hysteresis loop, the superparamagnetic behaviors were presented by Fe 3 O ...

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  • Highly Enhanced Adsorption of Lead Ions on

    2006-10-13 · An adsorption isotherm and kinetic study conducted at pH 4 and room temperature showed a maximum adsorption capacity of 294.12 mg/g and an adsorption equilibrium time of less than 5 h for lead ions on CTS-PAAC, in contrast to only 95.15 mg/g and up to 8 h on CTS.

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  • Conductivity and Electrical Properties of Chitosan ...

    2018-3-5 · (G) using: V ac (Z) Gd A, where d is the thickness of the prepared film, and A is the electrode-specimen contact cross-sectional area. 3. RESULTS AND DISCUSSION 3.1. XRD analysis From the X-ray diffraction pattern of the chitosan-methylcellulose blend film in figure 1-a, a

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  • Multifunctional Chitosan-Copper Oxide Hybrid

    2013-9-18 · Chitosan (CS) anchored copper oxide (CuO) hybrid material was prepared by chemical precipitation method. Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) confirmed the formation of CS-CuO hybrid. Transmission electron microscopy (TEM) analysis showed the immobilization of CuO nanoparticles on the surface of CS. The hybrid was also characterized by …

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  • Synthesis and solution property of acrylamide

    Sulfobetaine 3-[N,N-dimethyl-N-(2-methacryloxylethyl)ammonio]-propane sulfonate (DMAPS) was used to copolymerize with acrylamide (AM) to prepare salt-sensitive copolymers. The optimal reaction conditions, such as initiator concentration, temperature, and reaction time, to achieve the largest weight averaged molecular weight (Mw) and the lowest polydispersity index (PDI) were studied.

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  • Low-cost Plasma Activation and Chitosan Grafting

    Low-cost Plasma Activation and Chitosan Grafting of Polypropylene and Poly-Lactic-Acid Nonwoven Fabrics Související projekty: Plazmochemická modifikace přírodních polymerů na bázi celulózy v povrchovém nebo koplanárním bariérovém výboji

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  • Low-cost and cleanroom-free fabrication of

    2018-1-15 · We present a facile, low-cost and cleanroom-free technique for the fabrication of microneedles using molds created by laser ablation. Microneedle mold with high aspect ratios is …

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  • Photoinitiated Polymerization of Cationic

    A copolymer of acrylamide (AM) with acryloyloxyethyl trimethyl ammonium chloride (DAC) as the cationic monomer was synthesized under the irradiation of high-pressure mercury lamp with 2,2-azobis(2-amidinopropane) dihydrochloride (V-50) as the photoinitiator. The compositions of the photoinduced copolymer were characterized by Fourier transform infrared spectra (FTIR), ultraviolet spectra (UV ...

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  • Conductivity and Electrical Properties of Chitosan ...

    2018-3-5 · (G) using: V ac (Z) Gd A, where d is the thickness of the prepared film, and A is the electrode-specimen contact cross-sectional area. 3. RESULTS AND DISCUSSION 3.1. XRD analysis From the X-ray diffraction pattern of the chitosan-methylcellulose blend film in figure 1-a, a

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  • Preparation and application of magnetic chitosan in ...

    Additionally, magnetic-chitosan beads with silica were functionalized for the extraction of arsenic from water, since silica deposition improves the stability of the chitosan. 98 Magnetic chitosan beads adsorption efficiency was measured as 0.082 mg/g and according to the hysteresis loop, the superparamagnetic behaviors were presented by Fe 3 O ...

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  • Multifunctional Chitosan-Copper Oxide Hybrid

    2013-9-18 · Chitosan (CS) anchored copper oxide (CuO) hybrid material was prepared by chemical precipitation method. Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) confirmed the formation of CS-CuO hybrid. Transmission electron microscopy (TEM) analysis showed the immobilization of CuO nanoparticles on the surface of CS. The hybrid was also characterized by …

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  • Marine Drugs | Free Full-Text | Chitosan: An Update

    1 Faculty of Mathematics and Natural Science, Jan Długosz University in Częstochowa, 13/15 Armii Krajowej Av., 42-200 Częstochowa, Poland. 2 Polymer Institute of the Slovak Academy of Sciences, Dubravska Cesta 9, 845 41 Bratislava, Slovakia. 3 Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 34. M. C. Sklodowska St., 41-800 Zabrze, Poland

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  • Ecotoxicological Properties of Tulipalin A-Based ...

    The structural coloration of a chitosan-coated woven cotton fabric obtained by glutaraldehyde-stabilized deposition of electrostatic self-assembled monodisperse and spherically uniform (250 nm) poly (styrene-methyl methacrylate-acrylic acid) photonic crystal nanospheres (P(St-MMA-AA)) was investigat …

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  • Structural Coloration of Chitosan Coated Cellulose

    poly(acrylamide) 3D network of hydrogel which can disperse and fix PAOs well. As a result, the amidoxime groups of PAOs exhibit an outstanding uranium adsorption efficiency (718 ±16.6 and 1279 ± 14.5 mg g−1 of m uranium/m PAO in 8 and 32 ppm uranium-spiked seawater, respectively) among reported hydrogel-based adsorbents.

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  • Sunlight Polymerization of Poly(amidoxime) Hydrogel ...

    A copolymer of acrylamide (AM) with acryloyloxyethyl trimethyl ammonium chloride (DAC) as the cationic monomer was synthesized under the irradiation of high-pressure mercury lamp with 2,2-azobis(2-amidinopropane) dihydrochloride (V-50) as the photoinitiator. The compositions of the photoinduced copolymer were characterized by Fourier transform infrared spectra (FTIR), ultraviolet spectra (UV ...

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  • Photoinitiated Polymerization of Cationic

    2020-7-17 · Synergistic use of superabsorbent hydrogels has vital contribution to the daily life. This work gives an account of a facile approach to synthesize superabsorbent hydrogels based on Moringa oleifera gum and polyvinyl alcohol cross-linked with borax. Fourier transform infrared, X-ray diffraction, and scanning electron microscopy were employed to characterize the structure, crystallinity, and ...

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  • Morphological and Swelling Potential Evaluation of

    2020-1-14 · Chitosan has N-H, and excess OH − functional groups and PP-g-MA is highly porous, hence a good combination for adsorption processes. Due to …

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  • Ibuprofen microencapsulation within acrylamide

    2015-3-6 · This study deals with the development of interpenetrating polymer network (IPN) microspheres of acrylamide (AAm) grafted onto a chitosan (CS) backbone and methylcellulose (MC). Chitosan-graft-polyacrylamide (CS-g-PAAm) was synthesized by cerium (IV) ammonium nitrate-induced free radical graft polymerization. The grafting percentage was found to be 50.58%.

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  • Preparation of aminated chitosan microspheres by

    2019-5-15 · Chitosan is mainly a linear polysaccharide composed of glucopyranose units. It is a derivative obtained by deacetylation of chitin. It has a wide range of sources, low cost and good biocompatibility, and is widely used in the food, pharmaceutical and medical industries [7,8].

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  • Direct-write, highly aligned chitosan-poly(ethylene

    2013-2-22 · Near-field electrospinning has been demonstrated to be able to achieve direct-write and highly aligned chitosan nanofibers (CNF) with prescribed positioning density. Cell spreading in preferential direction could be observed on parallel-aligned nanofibers, and the CNF patterns were capable of guiding cell extension when the distances between them are 20 and 100 μm, respectively.

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  • Preparation of new diatomite–chitosan composite

    2017-12-13 · Immobilizing chitosan on diatomite blocked the channels of some of the diatomite, resulting in reduction of the pore volume and pore size of CA. However, the specific surface area of CA was larger than diatomite because chitosan was cross-linked with glutaraldehyde to form some new micropores. Figure 2. SEM image of CA.

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  • Antibacterial Activity of In Situ Prepared

    2018-3-2 · Investigation of new effective drugs against the methicillin-resistant strains of Staphylococcus aureus (MRSA) is an urgent issue of modern medicine. Antiseptics as an alternative of antibiotics are strong, sustained, and active preparations against resistant strains and do not violate microbiocenosis. The activity of in situ prepared chitosan-Ag nanoparticles (Ag NPs) solution with different ...

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  • Overview of Electrospinned Chitosan Nanofiber

    2020-9-25 · A solution of chitosan (0.035 g dissolved in 3 mL distilled water) and 7 g of magnetic fluid were dissolved in 3.5 L of distilled water. The pH of the mixture was lowered to 3.7 with 1 M HCl and the mixture was treated in an ultrasonic bath for 60 min at 60 °C.

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  • Development of Chitosan Functionalized Magnetic ...

    2020-10-14 · Chitosan is able to form a continuous coating film on the surface of the GC electrode. The good sensing performance of the TPA–MoS 2-modified sensor may be attributed to the following factors: the large surface area of MoS 2 (603 m 2 g −1), and the abundant thiol groups of TPA.

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  • Thiolated poly(aspartic acid)-functionalized two ...

    2019-2-1 · Activated sludge process is one of the main widely used methods in domestic sewage and industrial waste water treatment currently. A large amount of residual sludge is produced during domestic sewage treatment with the activated sludge process (Tang & Zhang 2014).The residual sludge contains a lot of nutrients, such as nitrogen, phosphorus, and organic matter, and at the same time contains a ...

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  • Study on the effect of chitosan conditioning on sludge ...

    2016-12-23 · Polymeric hydrogels of acrylic acid (AA), acrylamide (AAm) and N,N-Dimethylacrylamide (DMAm) were prepared by free-radical polymerization at 70°C in methanol, using allylpentaerythritol (APE) as a multifunctional crosslinker and benzoyl peroxide (BPO) as an initiator. The effects of DMAm concentration and variation of pH solutions on the swelling behavior of polymers were investigated.

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