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2018-12-11 · The ionic polyacrylamide/graphene oxide (PAM/GO) hydrogel as an excellent methylene blue (MB) adsorbent was prepared by an improved one-step radical polymerization method using graphene oxide, acrylamide, and polar second monomers. The hydrogel was characterized by Fourier transform infrared spectroscopy, Raman spectra, X-ray diffraction, scanning ...
Get Price2013-6-1 · Cationic, neutral, and anionic polyacrylamide hydrogel beads were prepared using an inverse emulsion polymerization .The aqueous phase (∼9 mL total) contained water, acrylamide, bis-acrylamide, allylamine (only for cationic hydrogels) and AMPS (only for anionic) hydrogels, and APS.The organic phase consisted of 9 mL cyclohexane with dissolution of 900 μL of Span 80 as surfactant to ...
Get Price2018-12-11 · The ionic polyacrylamide/graphene oxide (PAM/GO) hydrogel as an excellent methylene blue (MB) adsorbent was prepared by an improved one-step radical polymerization method using graphene oxide, acrylamide, and polar second monomers.
Get Price2017-11-16 · posite hydrogel using anionic partially hydrolyzed polyacrylamide and laponite (nanoclay) with absence of any crosslinkers. They reported that the clay concentration had a significant effect on the gel strength of the nanocomposite hydrogel. They also found that the nanocomposite hydrogel withoutanycrosslinkerexhibitedexcellenttensilemechanical
Get Price2016-6-1 · Sucrose/polyacrylamide hydrogel was chosen in this new method combining gel casting and physical foaming. 2 wt% anionic surfactant sodium dodecyl sulfate (SDS) was added to modified the foaming process.Experimental features: The carbon precursor was thermal polymerized in an inert atmosphere at 350 °C for 5 h. Compressive properties such as the compressive strength, plateau …
Get Price2020-11-1 · In the present study, TiO 2 nanoparticles dispersed in chitosan grafted polyacrylamide matrix (TiO 2 -PAM-CS) was synthesized using in situ technique, and applied for the uptake of Sirius yellow K-CF dye from aqueous solution. The synthesized nano-composite was characterized by FE-SEM, TEM, XRD and FT-IR analysis.
Get Price2020-10-1 · They are usually prepared by typical chemical methods involving free radical reactions in association with chemical cross-linkers [ 3, 4 ]. PAM hydrogels have been widely employed in many areas such as conformance control/water shut-off [ 5 ], medicine and agriculture [ …
Get Price2017-3-27 · Removal of anionic dyes from aqueous solutions using polyacrylamide and polyacrylic acid hydrogels Khadijeh Didehban†, Mozhgan Hayasi, and Fatemeh Kermajani Department of Chemistry, Payame Noor University, Tehran, P. O. Box 19395-36972, Iran (Received 19 April 2016 • accepted 2 …
Get Price2016-7-20 · Anionic hydrogel (partially hydrolysed PVA-polyacrylamide IPNs) Anionic polyelectrolyte is synthesized by partially hydrolyzing a polyacrylamide–PVA IPN system in NaOH solution. The detailed procedure is reported elsewhere18. 1 wt% or 3 wt% of _____ *Corresponding author ([email protected]
Get Price2018-10-30 · achieve fracture energy as high as ∼9000 J m−2.15 The value is much higher than that of pure alginate hydrogel (∼25 J m−2)or PAAm hydrogel (∼150 J m−2).15 Besides remarkable mechanical properties, the Ca-alginate/PAAm hydrogel also exhibits excellent biocompability.16 The Ca-alginate/PAAm hydrogels were fabricated by a one-step method.
Get PriceA method to assemble loaded stimuli-responsive DNA-polyacrylamide hydrogel-stabilized microcapsules is presented. The method involves coating substrate-loaded CaCO 3 microparticles, functionalized with nucleic acid promoter units, and cross-linking DNA-modified polyacrylamide chains on the microcapsules, using the hybridization chain reaction (HCR) to yield the DNA-cross-linked hydrogel coating.
Get PriceThe partitioning and transport of proteins in anionic, polyacrylamide-based gels were characterized by a direct visualization method using cytochrome c as the probe molecule. Homogeneous gels stabilized against mechanical and osmotic forces were made by synthesizing them inside fused-silica capillaries with a square cross section. Mixtures of 2-acrylamido-2-methylpropane sulfonic acid and ...
Get PriceThe same method was applied for the anionic unit PCL 70-b-PSS 48 ... (Sample 2)) against the control (only polyacrylamide hydrogel) and it was found that p > 0.05, which signifies that there is no significant difference in cell proliferation between the test sample and the control one. So it can be concluded that in the presence of the test ...
Get Price2020-6-17 · Creating Complex Polyacrylamide Hydrogel Structures Using 3D Printing with Applications to Mechanobiology. Yu-li Wang, ... this communication describes a simple method, using readily available reagents and equipment, for 3D printing polyacrylamide hydrogels at a resolution of 100–150 μm to create complex structures. As a demonstration of the ...
Get PriceAbstract: The preparation and application of functional hydrogels based on natural polysaccharides have always been a hot research topic. In this study, using acrylamide (AM) monomer, N, N'-methylene bisacrylamide (MBA) as cross-linking agent, potassium persulfate (K 2 S 2 O 8) as initiator, in the presence of natural polysaccharide sodium alginate (SA), the PAM/SA hydrogel was prepared by ...
Get Price2015-3-31 · In this study, novel blend hydrogel beads were prepared for the use in removal of anionic textile dyes due to their hazardous impact to nature. Sodium alginate and sodium alginate/poly(N-vinyl-2-pyrrolidone) beads were prepared by gelation method into calcium chloride solution. Prepared blend beads were characterized by TGA and FTIR analysis, and they were successfully used in adsorption …
Get Price2021-1-8 · where S is the swelling content (g water g dry gel −1), w t is the weight of swollen hydrogel at time t, and w d is the weight of original dry hydrogel.. Adsorption experiments. Effect of pH on dye removal was studied over a pH range of 2–10 and the pH of the solution was adjusted to the required value with 0.1 mol L −1 acid (HCl) or base (NaOH) solution using a pH meter (Hanna HI-2211 ...
Get Price2016-7-20 · Anionic hydrogel (partially hydrolysed PVA-polyacrylamide IPNs) Anionic polyelectrolyte is synthesized by partially hydrolyzing a polyacrylamide–PVA IPN system in NaOH solution. The detailed procedure is reported elsewhere18. 1 wt% or 3 wt% of _____ *Corresponding author ([email protected]
Get Price2018-10-30 · achieve fracture energy as high as ∼9000 J m−2.15 The value is much higher than that of pure alginate hydrogel (∼25 J m−2)or PAAm hydrogel (∼150 J m−2).15 Besides remarkable mechanical properties, the Ca-alginate/PAAm hydrogel also exhibits excellent biocompability.16 The Ca-alginate/PAAm hydrogels were fabricated by a one-step method.
Get PriceThe same method was applied for the anionic unit PCL 70-b-PSS 48 ... (Sample 2)) against the control (only polyacrylamide hydrogel) and it was found that p > 0.05, which signifies that there is no significant difference in cell proliferation between the test sample and the control one. So it can be concluded that in the presence of the test ...
Get PriceA method to assemble loaded stimuli-responsive DNA-polyacrylamide hydrogel-stabilized microcapsules is presented. The method involves coating substrate-loaded CaCO 3 microparticles, functionalized with nucleic acid promoter units, and cross-linking DNA-modified polyacrylamide chains on the microcapsules, using the hybridization chain reaction (HCR) to yield the DNA-cross-linked hydrogel coating.
Get PriceA novel amphiphilic nano hydrogel using ketene based polyester with polyacrylamide for controlled drug delivery system J Mater Sci Mater Med . 2008 Sep;19(9):3005-14. doi: 10.1007/s10856-008-3430-5.
Get Price2020-6-17 · Creating Complex Polyacrylamide Hydrogel Structures Using 3D Printing with Applications to Mechanobiology. Yu-li Wang, ... this communication describes a simple method, using readily available reagents and equipment, for 3D printing polyacrylamide hydrogels at a resolution of 100–150 μm to create complex structures. As a demonstration of the ...
Get PricePolyacrylamide nonionic water-soluble polymer; CAS Number: 9003-05-8; Linear Formula: (C3H5NO)n; find Sigma-Aldrich-92560 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich
Get PriceAbstract: The preparation and application of functional hydrogels based on natural polysaccharides have always been a hot research topic. In this study, using acrylamide (AM) monomer, N, N'-methylene bisacrylamide (MBA) as cross-linking agent, potassium persulfate (K 2 S 2 O 8) as initiator, in the presence of natural polysaccharide sodium alginate (SA), the PAM/SA hydrogel was prepared by ...
Get Price9. The method of claim 5, wherein the polyethylene glycol is applied in the form of an aqueous solution thereof. 10. The method of claim 5, wherein the hydrogel polymer is polyacrylamide, a partially hydrolyzed product of polyacrylamide, or a copolymer derived from acrylamide and another vinyl monomer copolymerizable therewith. 11.
Get PriceRapid solidification of Portland cement/polyacrylamide . In this study, a series of Portland cement/polyacrylamide hydrogel (PC/PAM) composites suitable for the wastewater treatment were prepared by a one-pot method and their time-dependent reaction . Get Price
Get Price2016-7-20 · Anionic hydrogel (partially hydrolysed PVA-polyacrylamide IPNs) Anionic polyelectrolyte is synthesized by partially hydrolyzing a polyacrylamide–PVA IPN system in NaOH solution. The detailed procedure is reported elsewhere18. 1 wt% or 3 wt% of _____ *Corresponding author ([email protected]
Get Price2018-10-30 · achieve fracture energy as high as ∼9000 J m−2.15 The value is much higher than that of pure alginate hydrogel (∼25 J m−2)or PAAm hydrogel (∼150 J m−2).15 Besides remarkable mechanical properties, the Ca-alginate/PAAm hydrogel also exhibits excellent biocompability.16 The Ca-alginate/PAAm hydrogels were fabricated by a one-step method.
Get Price2016-8-19 · 2. Differences between polyacrylamide emulsions and powders Handling of emulsions using pumps is simpler than powders and in many cases, in-line injection can be used, avoiding the need for an aging tank. Furthermore, dissolution times are much shorter and there are almost no solubility problems. Unlike powders, emulsions are complex
Get PriceA novel amphiphilic nano hydrogel using ketene based polyester with polyacrylamide for controlled drug delivery system J Mater Sci Mater Med . 2008 Sep;19(9):3005-14. doi: 10.1007/s10856-008-3430-5.
Get PriceThe method of Polyacrylamide production technology. Emulsion polymerization is another important synthesis method polyacrylamide, which is a conventional operation in the dispersed aqueous acrylamide solution in an organic solvent such as gasoline, with vigorous stirring, the solution was uniformly dispersed emulsion system is formed, followed by the addition of acrylamide initiator reaction ...
Get PriceSynthesis of a cationic polyacrylamide by a photocatalytic surface-initiated method and evaluation of its flocculation and dewatering performance: nano-TiO 2 as
Get PriceChem. J. Chinese Universities ›› 2015, Vol. 36 ›› Issue (2): 395-398. doi: 10.7503/cjcu20140823 • Polymer Chemistry • Previous Articles Interaction of Anionic Polyacrylamide with Cationic Surfactants † CAO Xulong 1, * (), HU Yue 2, SONG Xinwang 1, ZHU Yangwen 1, HAN Yugui 1, WANG Kunpeng 2, GUO Dongsheng 2, LIU Yu 2, *
Get Price9. The method of claim 5, wherein the polyethylene glycol is applied in the form of an aqueous solution thereof. 10. The method of claim 5, wherein the hydrogel polymer is polyacrylamide, a partially hydrolyzed product of polyacrylamide, or a copolymer derived from acrylamide and another vinyl monomer copolymerizable therewith. 11.
Get Price2021-5-13 · The hydrogels were prepared using AAm concentrations of e 1.0, f 2.5, and g 5.0 mol/L. (h) Photographs of a swollen PAAm hydrogel during compression and shear tests.
Get Price2021-7-12 · The hydrogel was purified according to the method above. Characterization of AAL, PAAm, and the Hydrogels. The FT-IR spectra of AAL, PAAm, and LGA2 were obtained on a Nicolet Nexus 670 Fourier transform infrared spectrometer using the KBr pellet technique. The samples were scanned 32 times in the range of 4000 to 500 cm-1.
Get PriceThe originality of our preconcentrator is based on simple photochemical copolymerization of monomers using the following procedure: All channels of the PMMA-made microchip were filled with gel solution comprising acrylamide, N,N'-methylene-bisacrylamide, and 2-acrylamide-2-methylpropanesulfonic acid with riboflavin as a photocatalytic initiator.
Get Price(2014). “Hydrogel with lignin for dye,” BioResources 9(3), 4369-4381. 4369 Synthesis and Characterization of Porous Hydrogel Based on Lignin and Polyacrylamide Qinghua Feng, a,b aJinling Li, Heli Cheng, Fangeng Chen,c,* and Yimin Xie a,* A porous lignin-containing hydrogel was developed for …
Get Price2017-8-11 · Semi-empirical PM6-D3H4 method was employed to further figure out the adsorption mechanism between the PAAM/PA/PDA hydrogel and dye molecules by using Mopac2012 program since weak interactions in ...
Get PriceDiffusion of polymers through polyacrylamide gels. Diffusion of polymers through gels. L. Haggerty et al. RESULTS AND DISCUSSION Effect of monomer and crosslinker concentration on diffusion In Figure 4, the diffusion coefficients for the four solutes are plotted as a function of the initial monomer concentration in the gel (constant crosslink ratio of 0.035).
Get PriceA bio-compatible hydrogel sorbent was prepared through chemical conjugation of glutamic acid (GA) with gum tragacanth (GT) followed by mixing with anionic polyacrylamide (PAAm) and irradiating by the electron beam. The prepared composite of the hydrogel of …
Get Price2019-10-15 · To further understand the structural characteristics of the pie bentonite–acrylamide hydrogel formed by the nonmixing method, a Japanese Hitachi S-4800 scanning electron microscope combined with an EDAX XM2-60S spectrometer was used to analyze the elemental distribution in three regions (plane 1, plane 2, and plane 3) in the longitudinal ...
Get PriceWhat is claimed is: 1. A method of preparing a polyacrylamide hydrogel comprising: (a) providing a liquid solution comprising a polyacrylamide reactive prepolymer, wherein the polyacrylamide reactive prepolymer comprises a copolymer of acrylamide and one or more compounds selected from the group consisting of N-(6-acryloylhexyl)-2,3-dimethylmaleimide, vinyl cinnamate, and acrylic acid, wherein ...
Get Price2017-9-8 · In our recordings, spontaneous Ca 2+ activity was detected in 36% of control cells visualised in each field (21 out of 58 neurons, n = 8 fields) and, similarly, in 25% AMG0.2 cells (16 out of 64 ...
Get Price2021-4-9 · The hydrogels were prepared using AAm concentrations of e 1.0, f 2.5, and g 5.0 mol/L. h Photographs of a swollen PAAm hydrogel during compression and shear tests. The PAAm hydrogel …
Get Price2021-7-12 · The hydrogel was purified according to the method above. Characterization of AAL, PAAm, and the Hydrogels. The FT-IR spectra of AAL, PAAm, and LGA2 were obtained on a Nicolet Nexus 670 Fourier transform infrared spectrometer using the KBr pellet technique. The samples were scanned 32 times in the range of 4000 to 500 cm-1.
Get Price2015-1-25 · Using of Hydrogel to Increase Maize Salt Tolerance ... Anionic character is imparted to polyacrylamide which is basically non ionic, either by copolymerization with an unsaturated acid such as acrylic acid or by partial ... Proline was determined using the method of Bates et.al. (9).
Get Price(2014). “Hydrogel with lignin for dye,” BioResources 9(3), 4369-4381. 4369 Synthesis and Characterization of Porous Hydrogel Based on Lignin and Polyacrylamide Qinghua Feng, a,b aJinling Li, Heli Cheng, Fangeng Chen,c,* and Yimin Xie a,* A porous lignin-containing hydrogel was developed for …
Get Price2019-11-11 · Highly stable Ag NPs were synthesized using anionic polyacrylamide (APAM) as the template and reductant. When APAM concentration was 1.50 µM, as-prepared Ag NPs with the diameter of about 3.8 nm had a quantum yield as high as 1.51%. When adding Cu 2+ and Hg 2…
Get PriceTwo types of electrically conductive hydrogels were prepared using polyaniline (PANI), graphene and polyacrylamide (PAA). PANI/PAA hydrogels were prepared using interfacial polymerization method and Graphene/PAA hydrogels were prepared using free radical polymerization method. Several characterization tests were carried out to investigate the properties of conductive hydrogel such as …
Get PriceDiffusion of polymers through polyacrylamide gels. Diffusion of polymers through gels. L. Haggerty et al. RESULTS AND DISCUSSION Effect of monomer and crosslinker concentration on diffusion In Figure 4, the diffusion coefficients for the four solutes are plotted as a function of the initial monomer concentration in the gel (constant crosslink ratio of 0.035).
Get PriceSynthesis of a cationic polyacrylamide by a photocatalytic surface-initiated method and evaluation of its flocculation and dewatering performance: nano-TiO 2 as
Get Price2021-5-13 · The hydrogels were prepared using AAm concentrations of e 1.0, f 2.5, and g 5.0 mol/L. (h) Photographs of a swollen PAAm hydrogel during compression and shear tests.
Get Price2019-11-11 · Highly stable Ag NPs were synthesized using anionic polyacrylamide (APAM) as the template and reductant. When APAM concentration was 1.50 µM, as-prepared Ag NPs with the diameter of about 3.8 nm had a quantum yield as high as 1.51%. When adding Cu 2+ and Hg 2…
Get Price2021-6-21 · M2+ dual-crosslink gels (M: Ni or Zn). 2.1. Dual-Crosslink Gels by One-Pot Synthesis The one-pot synthesis method is a simple way to prepare dual-crosslink gels of variable crosslinking ratios at the same overall polymer concentration. The synthesized gels can also be compared in the as-prepared state. This synthesis method consists of the
Get Price2019-12-12 · Gel for Simultaneous Chemical Imaging of Anionic and Cationic Solutes Using Diffusive Gradients in Thin Films Andreas Kreuzeder,† Jakob Santner,*,† Thomas Prohaska,‡ and Walter W. Wenzel† †Department of Forest and Soil Sciences, Institute of Soil Research, ‡Department of Chemistry, VIRIS Laboratory, University of Natural Resources and Life Sciences, Vienna (BOKU), Konrad-Lorenz ...
Get PriceTwo types of electrically conductive hydrogels were prepared using polyaniline (PANI), graphene and polyacrylamide (PAA). PANI/PAA hydrogels were prepared using interfacial polymerization method and Graphene/PAA hydrogels were prepared using free radical polymerization method. Several characterization tests were carried out to investigate the properties of conductive hydrogel such as …
Get Price(2014). “Hydrogel with lignin for dye,” BioResources 9(3), 4369-4381. 4369 Synthesis and Characterization of Porous Hydrogel Based on Lignin and Polyacrylamide Qinghua Feng, a,b aJinling Li, Heli Cheng, Fangeng Chen,c,* and Yimin Xie a,* A porous lignin-containing hydrogel was developed for …
Get Price2020-3-5 · In this paper, a copolymer is first synthesized by the method of inverse emulsion polymn. using 2-acrylamide-2-tetradecyl Et sulfonic acid (AMC16S), acrylamide (AM), and acrylic acid (AA). The developed copolymer has a highly branching skeleton and can resist temp. up to 100 °C.
Get PriceAbstract In this study, a method to remove dioctyl phthalate (DOP) form water was realized through a flocculation process with a novel polyacrylamide flocculant P(AM/AA/AMPS). P(AM/AA/AMPS) was synthesized under ultraviolet (UV) irradiation using acryl amide (AM), acrylic acid (AA) and 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) with 2,2′-azobis (2-methylpropionamidine ...
Get Price2.2. Synthesis of copolymers Cationic polymeric flocculants named as TPADs (TPAD1–6) were synthesized by photocatalytic surface-initiated polymerization using nano-TiO 2 as initiator. The synthetic conditions are shown in Table 3.The desired amount of AM, DAC and a certain volume of ultrapure water were added to a 50 mL Pyrex glass vessel and then stirred until dissolving totally.
Get Price2021-5-13 · The hydrogels were prepared using AAm concentrations of e 1.0, f 2.5, and g 5.0 mol/L. (h) Photographs of a swollen PAAm hydrogel during compression and shear tests.
Get Price2021-6-21 · M2+ dual-crosslink gels (M: Ni or Zn). 2.1. Dual-Crosslink Gels by One-Pot Synthesis The one-pot synthesis method is a simple way to prepare dual-crosslink gels of variable crosslinking ratios at the same overall polymer concentration. The synthesized gels can also be compared in the as-prepared state. This synthesis method consists of the
Get Price2017-8-11 · Semi-empirical PM6-D3H4 method was employed to further figure out the adsorption mechanism between the PAAM/PA/PDA hydrogel and dye molecules by using Mopac2012 program since weak interactions in ...
Get Price2020-3-5 · In this paper, a copolymer is first synthesized by the method of inverse emulsion polymn. using 2-acrylamide-2-tetradecyl Et sulfonic acid (AMC16S), acrylamide (AM), and acrylic acid (AA). The developed copolymer has a highly branching skeleton and can resist temp. up to 100 °C.
Get Price2.2. Synthesis of copolymers Cationic polymeric flocculants named as TPADs (TPAD1–6) were synthesized by photocatalytic surface-initiated polymerization using nano-TiO 2 as initiator. The synthetic conditions are shown in Table 3.The desired amount of AM, DAC and a certain volume of ultrapure water were added to a 50 mL Pyrex glass vessel and then stirred until dissolving totally.
Get Price2017-3-30 · Herein, we report a new method for the fabrication of fluorescent composite hydrogels based on the in situ synthesis of UCNPs, using polyacrylamide (PAAm) as a hydrogel template. This approach achieves control over the fluorescence properties of the resulting hydrogel by simply adjusting hydrogel crosslinking intensity.
Get Price2017-8-11 · Herein, we demonstrate that the three-dimensional porous polyacrylamide-phytic acid-polydopamine (termed as PAAM/PA/PDA) hydrogel can be served as reusable adsorbent with high efficiency for either anionic or cationic dyes. Using methyl blue (MB), methylene blue (YMB), methyl violet (MV) and neutral red (NR) as model dyes, we investigate the ...
Get Price2021-4-9 · The hydrogels were prepared using AAm concentrations of e 1.0, f 2.5, and g 5.0 mol/L. h Photographs of a swollen PAAm hydrogel during compression and shear tests. The PAAm hydrogel …
Get Price2020-3-3 · For example, an artificial muscle that consist of anionic and cationic pH-responsive hydrogel layers can be bent toward anionic layer in acidic condition and toward cationic layer in neutral and basic conditions (Figure 3C). 92 In contrast to a unimorph system, the deformation energy of both layers always exert in same direction due to inverse ...
Get Price2020-12-17 · The characteristic feature of a hydrogel is the retention of excessive amounts of water, generally more than 20% from its dry weight. 3 Hydrophilic groups, such as COOH, OH, NH 2, CONH , CONH 2, and SO 3 H, present in the gel network are responsible for the absorption of water. 7, 12 Hydrogels can also absorb a wide range of solvents other than ...
Get Price2021-6-8 · Gaps in our ability to document local water relations in leaves compromise our ability to build complete models of leaf and plant function and our understanding of ecophysiological phenomena, such as response and adaptation to drought. Macroscopically, leaf water potential has been shown to impact vegetative growth and yield, susceptibility to disease, and, in extreme drought, plant viability ...
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