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2015-3-1 · In DTA curve of chitosan-g-poly(acrylamide)/ZnS nanocomposite the exothermic peak was found to be at 222.5 °C (123.8 μV). It has been observed from the above data that the FDT of CPAZ nanocomposite was found to be higher than chitosan, which may be due to the grafting of acrylamide and ZnS nanoparticles.
Get Price2016-3-1 · Chitosan-g-poly(acrylamide)/Zn (CPA-Zn) nanocomposite was synthesized using simple method in the presence of microwave radiations. CPA-Zn nanocomposite was characterized by various analytical techniques. CPA-Zn nanocomposite was used for controlled drug delivery of ofloxacin. The maximum drug release was 75% which was observed in acidic medium.
Get Price2016-7-1 · Chitosan-g-poly(acrylamide)/CuS (CPA/CS) nanocomposite has been synthesized in microwave reactor. Different spectral techniques confirmed the formation of nanocomposite. The drug release behavior of CPA/CS nanocomposites were …
Get Price2017-2-1 · 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 ...
Get Price2019-11-7 · A novel mineral-based superabsorbent hydrogel composite, poly (2-acrylamido-2-methylpropanesulfonic acid-co-acrylic acid-co-acrylamide)/ground basalt: CS-g-P(AMPS-co-AA-co-AM)/BST/BST, is prepared under microwave irradiation. The structural and morphological characterization of hydrogel is assessed using FTIR spectroscopy, X-ray diffractometry and …
Get Price2011-5-16 · Modified chitosan 4. Superabsorbent hydrogels from poly(acrylic acid-co-acrylamide) grafted chitosan with salt- and pH-responsiveness properties
Get Price2009-7-15 · The IR spectra of the chitosan, Ch-g-PAM, RV dye and dye loaded chitosan, Ch-g-PAM and PAM-RV are shown in Fig. 4.IR spectrum of the RV dye is complex and shows many absorption peaks which includes phenolic O–H stretching at 3422 cm, −1 N–H stretching of secondary amide at 3340 cm −1; amide C O stretching at 1658 cm −1; –S O stretching of SO 3 H group at 1398 cm …
Get Price2018-6-21 · Chitosan is produced by alkaline deacetylation of chitin extracted from exoskeletons of crustaceans . This study deals with the incorporation of ground basaltic rock, as a soil ameliorant, to a hydrogel based on chitosan biopolymer grafted onto poly(acrylic acid-co-acrylamide): CTS-g-P(AA-co-AM)/BT under microwave irradiation. This brand-new hydrogel composite combines chitosan …
Get Price2017-5-1 · The mechanical strength of N-succinyl chitosan-g-poly (acrylamide-co-acrylic acid) hydrogels was evaluated using oscillatory MCR 301 rheometer (Paar-Physica) at 25 °C with 25 mm in diameter parallel plate geometry. The strain amplitude test was conducted in strain range of 0.01–20% at a constant angular frequency of 10 rad/s.
Get Price2016-5-11 · The novel chitosan-g-poly(acrylic acid)/polyacrylamide DN gels were synthesized successfully. Based on the research results, the AAm concentration really played an important role in the chemical structure, intermolecular interaction, and mechanical properties of DN networks.
Get Price2016-3-16 · A granular hydrogel of chitosan-g-poly(vinylimidazole-co-2-acrylamido-2-methyl propane sulfonic acid) was successfully synthesized by one-step free radical polymerization based on the grafting backbone of chitosan and the monomers of vinylimidazole and 2-acrylamido-2-methyl propane sulfonic acid. The resulting hydrogel could be used as the adsorbent for the …
Get Priceantibacterial activities.29 With these outstanding features, chitosan-based SHs may have more potential applications in the future. 2. Preparation methods ... tion process of chitosan-g-poly(acrylic acid-co-acrylamide) Zhengke Wang received his Ph.D degree at Zhejiang University in 2009. In 2009–2012, he carried
Get Price2010-12-23 · In this study, chitosan-g-poly(acrylic acid) (CTS-g-PAA) hydrogel with crosslinked polymeric networks was prepared from an aqueous dispersion polymerization and then used as the adsorbent to recover a valuable metal, Ni2+.
Get Price2021-7-15 · where C o and C t (mg L −1) are the initial and at t time concentrations of tetracycline, respectively; V (L) is the volume of the solution, and m (g): is the weight of adsorbent.. The adsorption isotherm and kinetic experiments for tetracycline were investigated at different concentrations of tetracycline (10–100 mg L −1): A 0.03 g of chitosan-graft-poly…
Get Pricechitosan (ch) and poly(γ-glutamic acid (γ-pga) as polyelectrolytes (pes) Polyelectrolyte (PE) is the term used to classify polymeric macromolecules with charged or chargeable groups when dis-
Get PricePoly(acrylamido-co-3-methacrylopropyl trimethyl ammonium chloride)-Chitosan semi-IPN hydrogels were prepared by free-radical polymerization of the monomer acrylamide (AAm) and the cationic comonomer 3methacrylo propyl trimethyl ammonium chloride (MAPTAC) with N,N-methylene bisacrylamide (BAAm) as the crosslinker in presence of chitosan, which is also …
Get PriceMethods: The purpose of this research was to prepare a novel thermo-sensitive hydrogel-poly (N-isopropyl-acrylamide)/poly (γ-glutamic acid) (PP) loaded with superoxide dismutase (SOD) to improve the effect for trauma treatment. The micromorphology of the hydrogel was observed by scanning electron microscope and the physical properties were ...
Get Pricechitosan (ch) and poly(γ-glutamic acid (γ-pga) as polyelectrolytes (pes) Polyelectrolyte (PE) is the term used to classify polymeric macromolecules with charged or chargeable groups when dis-
Get Price2019-3-7 · These materials include chitosan gelatin and chitosan/poly(L-lysine) polyelectrolyte-based scaffolds (Martin-Lopez et al. 2012), chitosan-gold nanocomposites (Lin et al. 2008), chitosan/polylactic acid films (Xie et al. 2008), chitosan/poly(3-hydroxybutyrate-co-3-hydroxyvalerate) nanofibers (Biazar and Heidari Keshel 2014), porous chitosan ...
Get PriceMore recently, our group evaluated the stability and rheological behavior of suspensions of PNIPAM, chitosan-g-PNIPAM and chitosan-g-(PNIPAM-co-PAA) particles, which were prepared by using potassium persulfate (50 °C) as initiator and MBA as a crosslinking agent. Differences on particle-particle and particle-solvent attractive interactions ...
Get Price2020-9-16 · Chitosan has wide applications in the field of medical dressings due to its good biomedical properties. This review provides the application status and technical analysis of chitosan medical dressings. First, we introduce the source and chemical structure of chitosan. Then, we investigate the mechanism of chitosan 2020 Reviews in RSC Advances
Get Price2021-5-5 · Today, with the advances in technology and science, more advanced drug delivery formulations are required. One of these new systems is an intelligent hydrogel. These systems are affected by the environment or conditions that become a gel, stay in the circumstance for a certain period, and slowly release the drug. As an advantage, only a lower dose of the drug is required, …
Get Pricepolyacrylamide, an acrylic resin that has the unique property of being soluble in water. It is employed in the treatment of industrial and municipal wastewater. Polyacrylamides are produced by the polymerization of acrylamide (C3H5NO), a compound obtained by the hydration of acrylonitrile.
Get Price2020-1-3 · We report on the synthesis of chitosan-alginate nanodisks (Cs-Al NDs) using a simple approach consisting of the ionotropic gelation method. Sodium tripolyphosphate (STPP) was used as crosslinking agent to promote the electrostatic interaction between amine groups the chitosan and hydroxyl and carboxyl groups of alginate. Scanning electron microscopy (SEM) images …
Get PricePolypropylene (PP) is a rigid and crystalline thermoplastic used widely in everyday objects like packaging trays, household products, battery cases, medical devices, etc. Explore this comprehensive guide and learn everything you need to know about this widely used thermoplastic.
Get Price2021-7-15 · where C o and C t (mg L −1) are the initial and at t time concentrations of tetracycline, respectively; V (L) is the volume of the solution, and m (g): is the weight of adsorbent.. The adsorption isotherm and kinetic experiments for tetracycline were investigated at different concentrations of tetracycline (10–100 mg L −1): A 0.03 g of chitosan-graft-poly…
Get Price2017-1-24 · Abraham G. Alvarado, Andres Ortega, Lourdes A. Pérez-Carrillo, Israel Ceja, Martin Arellano, R. Guillermo López, Jorge E. Puig, ' Synthesis, Characterization, and Drug Delivery from pH- and Thermoresponsive Poly(N-Isopropylacrylamide)/Chitosan Core/Shell Nanocomposites Made by Semicontinuous Heterophase Polymerization ', Journal of ...
Get Price2015-4-28 · The therapeutic concentration of cisplatin (CDDP) is usually associated with dose-limiting side effects. To avoid these harmful effects, a biocompatible hydrogel carrier which consisted of poly(N-isopropylacrylamide) and carboxymethyl chitosan was designed to deliver CDDP to the local environment of a solid tumor. The poly(N-isopropylacrylamide)-g-carboxymethyl chitosan …
Get PriceA novel type of supramolecular hydrogel was developed by in situ polymerization of acrylic acid (AA) and acrylamide (AM) monomers in the aqueous solution of chitosan ...
Get Price2021-3-12 · This is likely associated with the diffusion, in and out of the layer, of the more mobile PAA that has a significantly lower molecular weight than chitosan (1800 g/mol compared to ∼100.000 g/mol for chitosan). This will be further discussed in …
Get PricePoly(gamm-Glutamic Acid)/Chitosan Hydrogel Nanoparticles For Effective Preservation And Delivery Of Fermented Herbal Extract For Enlarging Hair Bulb And Enhancing Hair Growth Hye Su Kim,1 Ha-Kyoung Kwon,2 Dong Hoon Lee,1 Thao Nguyen Le,1 Hye-Jin Park,2 Moon Il Kim1 1Department of BioNano Technology, Gachon University, Seongnam, Gyeonggi 13120, Republic …
Get Pricepolyacrylamide, an acrylic resin that has the unique property of being soluble in water. It is employed in the treatment of industrial and municipal wastewater. Polyacrylamides are produced by the polymerization of acrylamide (C3H5NO), a compound obtained by the hydration of acrylonitrile.
Get Price2019-5-25 · Superior Cell Delivery Features of Poly(ethylene glycol) Incorporated Alginate, Chitosan, and Poly-l-lysine Microcapsules. Tasima Haque, Hongmei Chen, Wei Ouyang, Christopher Martoni, Bisi Lawuyi, Aleksandra Malgorzata Urbanska, and ; Satya Prakash
Get Price2020-9-16 · Chitosan has wide applications in the field of medical dressings due to its good biomedical properties. This review provides the application status and technical analysis of chitosan medical dressings. First, we introduce the source and chemical structure of chitosan. Then, we investigate the mechanism of chitosan 2020 Reviews in RSC Advances
Get Price2005-11-29 · Chitosan-g-poly(N-isopropylacrylamide) (chitosan-g-PNIPAM) was synthesized and characterized rheologically in aqueous solutions. The copolymer solution exhibits a thermoassociative behavior in which its elastic response dramatically increases when temperature is above the critical temperature or the association temperature, T assoc. The copolymer at low …
Get Price2021-7-15 · where C o and C t (mg L −1) are the initial and at t time concentrations of tetracycline, respectively; V (L) is the volume of the solution, and m (g): is the weight of adsorbent.. The adsorption isotherm and kinetic experiments for tetracycline were investigated at different concentrations of tetracycline (10–100 mg L −1): A 0.03 g of chitosan-graft-poly…
Get Price2021-5-4 · Nanoparticles of Chitosan/Poly(D,L-Lactide-Co-Glycolide) Enhanced the Immune Responses of Haemonchus contortus HCA59 Antigen in Model Mice Javascript is currently disabled in your browser. Several features of this site will not function whilst javascript is disabled.
Get PriceMore recently, our group evaluated the stability and rheological behavior of suspensions of PNIPAM, chitosan-g-PNIPAM and chitosan-g-(PNIPAM-co-PAA) particles, which were prepared by using potassium persulfate (50 °C) as initiator and MBA as a crosslinking agent. Differences on particle-particle and particle-solvent attractive interactions ...
Get PriceThis study was aimed to explore whether the chain length of poly-l-arginine grafted on chitosan had a great significance on the transfection efficiency of entering the cells. Herein, arginine and arginine peptide modified chitosan were synthesized as gene vectors (CS-Arg and CS-5Arg) and then the chemical structures were characterized by using ...
Get Price2019-7-31 · The chitosan was dried in an oven until a constant weight was observed. A 10 g L-1 solution of chitosan was prepared by dissolving 5 g of chitosan in 500 mL acetic acid (0.1 M) followed by stirring and heating at 60 oC overnight. The solution was filtered to remove dust and other traces of impurities.
Get Price2011-9-24 · Chitosan-graft-poly (2-hydroxyethyl methacrylate-co-itaconic acid) has been synthesized for different feed ratios of 2-hydroxyethyl methacrylate and itaconic acid and characterized by FT-IR, thermogravimetry and swelling in simulated biological fluids (SBF) and evaluated as a drug carrier with model drug, tramadol hydrochloride (TRM).Grafting decreased the thermal stability of chitosan.
Get PricePhysicochemical features and transfection properties of chitosan/poloxamer 188/poly(D,L-lactide-co-glycolide) nanoplexes. 14 Pages. Physicochemical features and transfection properties of chitosan/poloxamer 188/poly(D,L-lactide-co-glycolide) nanoplexes. International Journal of Nanomedicine, 2014.
Get Price2020-9-16 · Chitosan has wide applications in the field of medical dressings due to its good biomedical properties. This review provides the application status and technical analysis of chitosan medical dressings. First, we introduce the source and chemical structure of chitosan. Then, we investigate the mechanism of chitosan 2020 Reviews in RSC Advances
Get Price2012-4-2 · (2009). In Vivo Validation of Biological Responses of bFGF Released from Microspheres Formulated by Blending Poly-Lactide-co-Glycolide and Poly(ethylene glycol)-Grafted-Chitosan in Hamster Cheek Pouch Microcirculatory Models. Journal of Biomaterials Science, Polymer Edition: Vol. 20, No. 7-8, pp. 903-922.
Get PriceAPE was used as crosslinking agent. 2.5 g of acrylamide, 2.5 g of acrylic acid and 50 mg of APE were dissolved in 20 mL methanol, and then 0.2, 0.4, 0.6, 0.8, 1 g of DMAm were added to the alcoholic solution of AA/AAm (Table 1). The polymerization was initiated by the addition of 1 mL of 5% (w/v) solution of BPO in methanol.
Get Price2016-2-15 · Chitosan was grafted onto poly(3-hydroxybutyrate) (P(3HB)) as in our earlier work by using gamma radiation-induced polymerization reaction. We now provide structural and surface characteristics of the graft copolymer in view of potential applications. The modified P(3HB) was characterized by 1H/solid-state 13C CP-MAS nuclear magnetic resonance, Fourier transform …
Get Price2017-3-8 · A third allomorph g-chitin has also been described [1,3], but from a detailed analysis, it seems that it is. Fig. 1. Chemical structure (a) of chitin poly( N-acetyl-b-Dglucosamine) and (b) of chitosan (poly(D-glucosamine) repeat units. (c) Structure of partially acetylated chitosan, a copolymer characterized by its average degree of acetylation DA.
Get Price2019-9-17 · Chitosan-based hydrogel has received considerable interests because of its appealing properties and applications in many areas. The primary objective of this work was to produce novel cationic chitosan-based hydrogels via polymerizing chitosan with two cationic monomers of the same structure but with different counter ions [2-(methacryloyloxy)ethyl]trimethylammonium …
Get Price2016-7-13 · How SDS-PAGE Works. SDS-PAGE (sodium dodecyl sulphate-polyacrylamide gel electrophoresis) is commonly used in the lab for the separation of proteins based on their molecular weight. It’s one of those techniques that is commonly used but not frequently fully understood. So let’s try and fix that. SDS-PAGE separates proteins according to ...
Get PriceClick Chemistry Azide-Alkyne Cycloaddition 'Click Chemistry' is a term that was introduced by K. B. Sharpless in 2001 to describe reactions that are high yielding, wide in scope, create only byproducts that can be removed without chromatography, are stereospecific, simple to perform, and can be conducted in easily removable or benign solvents.
Get Price2018-12-17 · Antimicrobial Chitosan-g-poly(AMPS-co-AA-co-AM)/Ground BasaltComposite Hydrogel: Synthesis and Characterization Majd Said1, YomenAtassi1*, Mohammad Tally1, Maissa Kattan1 and Lamia Kouba2 1Laboratory of Materials Science, Department of Applied Physics, Higher Institute for Applied Science and Technology, P.O. Box 31983, Damascus, Syria 2Faculty of …
Get Price2021-7-15 · where C o and C t (mg L −1) are the initial and at t time concentrations of tetracycline, respectively; V (L) is the volume of the solution, and m (g): is the weight of adsorbent.. The adsorption isotherm and kinetic experiments for tetracycline were investigated at different concentrations of tetracycline (10–100 mg L −1): A 0.03 g of chitosan-graft-poly…
Get PriceOne of the most important polymers in research, poly(ε-caprolactone) (PCL), however, lacks biological performance, easy access to modifications and cellular recognition sites. To improve these properties and to enable further modifications, PCL was blended with chitosan grafted with PCL (CS-g-PCL) and subsequently processed via electrospinning.
Get PriceDrug-eluting microspheres based on semi-interpenetrating polymer network (semi-IPN) of modified chitosan (Cs) and poly(2-acrylamide-2-methylpropanesulfonic acid) (PAMPS) were prepared. The preparation included two steps: polymerization of AMPS, formation of Cs/PAMPS microspheres and surface modification of the microspheres.
Get PriceAPE was used as crosslinking agent. 2.5 g of acrylamide, 2.5 g of acrylic acid and 50 mg of APE were dissolved in 20 mL methanol, and then 0.2, 0.4, 0.6, 0.8, 1 g of DMAm were added to the alcoholic solution of AA/AAm (Table 1). The polymerization was initiated by the addition of 1 mL of 5% (w/v) solution of BPO in methanol.
Get Price2016-9-30 · AbstractThe main objective of this work was to develop polyelectrolyte complex (PEC) nanoparticles based on poly (malic acid), chitosan (PMLA/CS) as pH-dependent delivery systems. The results indicated that the PMLA/CS Nps were successfully prepared. The prepared PMLA/CS Nps showed spherical morphology with a mean diameter of 212.81 nm and negative surface …
Get Price2015-11-14 · Chitosan, a poly[b-(1-4)-linked 2-amino-2-deoxy-D-glucan] is a bio-based biocompatible polymer derived from thenatural parent chitin, which shows a tremendous chemical versa-tility to provide a set of various chitosan grades by deacetylationreaction.
Get Price24 Cheng F, Gao J, Wang L, Hu X. Composite chitosan/poly(ethylene oxide) electrospun nanofibrous mats as novel wound dressing matrixes for the controlled release of drugs. Journal of Applied Polymer Science. 2015;132(24). DOI: 10.1002/app.42060 [ Links ] 25 Li L, Hsieh YL. Chitosan bicomponent nanofibers and nanoporous fibers.
Get PriceAPE was used as crosslinking agent. 2.5 g of acrylamide, 2.5 g of acrylic acid and 50 mg of APE were dissolved in 20 mL methanol, and then 0.2, 0.4, 0.6, 0.8, 1 g of DMAm were added to the alcoholic solution of AA/AAm (Table 1). The polymerization was initiated by the addition of 1 mL of 5% (w/v) solution of BPO in methanol.
Get Price2017-3-8 · A third allomorph g-chitin has also been described [1,3], but from a detailed analysis, it seems that it is. Fig. 1. Chemical structure (a) of chitin poly( N-acetyl-b-Dglucosamine) and (b) of chitosan (poly(D-glucosamine) repeat units. (c) Structure of partially acetylated chitosan, a copolymer characterized by its average degree of acetylation DA.
Get Price2021-7-7 · Generally Recognized as Safe (GRAS) 'GRAS' is an acronym for the phrase G enerally R ecognized A s S afe. Under sections 201 (s) and 409 of the …
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