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chitosan-g-poly acrylamide function

  • Fabrication of chitosan-g-poly(acrylamide)/CuS ...

    2016-7-1 · In present study, we reported the synthesis of chitosan-g-poly (acrylamide)/CuS (CPA/CS) nanocomposite for controlled delivery of ofloxacin. The CPA/CS nanocomposites were characterized by Fourier transmission infrared spectroscopy (FTIR), UV–visible spectroscopy (UV), scanning electron microscopy (SEM), X-ray diffraction (XRD) analysis.

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  • Tough and Self-Healing Chitosan/Poly(acrylamide- co ...

    2016-3-1 · Synthesis of chitosan-g-poly(acrylamide)/Zn (CPA-Zn) nanocomposite. CPA-Zn nanocomposite was synthesized in a microwave reactor. In a typical procedure, 2 g chitosan dissolved in 100 mL 1% aqueous acetic acid was added drop wise into 50 mL of 0.1 M acrylamide solution with constant stirring. Then Zn nanoparticles prepared above were added into ...

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  • Preparation of a novel chitosan-g-poly(acrylamide)/Zn ...

    Superabsorbent composites based on chitosan‐g‐poly(acrylamide) and montorillonite (CTS‐g‐PAAm/MMT) were synthesized through in situ radical polymerization by grafting of crosslinked acrylamide onto chitosan backbone in presence of MMT at different contents. The formation of the grafted network was confirmed by attenuated total reflectance Fourier transform infrared spectroscopy (ATR ...

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  • Preparation of

    2018-9-15 · These reactions, so-called Schiff base linkages, are reversible which endows the hydrogel self-healing properties. F. Ding and colleagues developed an acrylamide-modified chitosan and oxidized alginate-based hydrogels with recoverable self-healing and mechanical properties.

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  • Chitosan-based hydrogels: From preparation to

    2017-2-1 · In this work, quaternary ammonium chitosan-g-poly(acrylic acid-co-acrylamide) superabsorbent hydrogels were prepared successfully with preferable water absorbency, good antibacterial activity and some mechanical property. The structure was assured by FTIR and SEM, which indicated porous structure clearly.

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  • Preparation and properties of quaternary ammonium

    2016-8-1 · In present study, we reported the synthesis of chitosan-g-poly(acrylamide)/CuS (CPA/CS) nanocomposite for controlled delivery of ofloxacin. The CPA/CS nanocomposites were characterized by Fourier transmission infrared spectroscopy (FTIR), UV-visible spectroscopy (UV), scanning electron microscopy (SEM), X-ray diffraction (XRD) analysis.

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  • Fabrication of chitosan-g-poly(acrylamide)/CuS ...

    2020-4-9 · Chitosan is an amino polysaccharide, which is produced from chitin. Chitosan is the most important soluble product of chitin and is produced in an alkaline process with (1  4)-2-amino-2-deoxy-β-D-glucan structure. Chitosan is biodegradable, safe and biocompatible.

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  • Synthesis, characterization and absorption study of ...

    2019-6-18 · Hydrogel polymers were prepared via graft polymerization of acrylamide (AAm) onto chitosan (CTS) backbone in the presence of methylene bisacrylamide (MBA) as cross-linker and ammonium persulfate (APS) as an initiator.

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  • Synthesis of Poly(Acrylamide-Graft-Chitosan)

    2017-5-1 · 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.

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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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  • Interpenetrated Chitosan-Poly(Acrylic Acid-Co

    In present study, we reported the synthesis of chitosan-g-poly(acrylamide)/CuS (CPA/CS) nanocomposite for controlled delivery of ofloxacin. The CPA/CS nanocomposites were characterized by Fourier transmission infrared spectroscopy (FTIR), UV-visible spectroscopy (UV), scanning electron microscopy (SEM), X-ray diffraction (XRD) analysis.

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  • Fabrication of chitosan-g-poly(acrylamide)/CuS ...

    2019-6-18 · Hydrogel polymers were prepared via graft polymerization of acrylamide (AAm) onto chitosan (CTS) backbone in the presence of methylene bisacrylamide (MBA) as cross-linker and ammonium persulfate (APS) as an initiator. Optimizing the crosslinking graft reaction of AAm onto CTS was studied by varying the concentration of CTS and MBA cross-linker and discussing the effect of these …

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  • Synthesis of Poly(Acrylamide-Graft-Chitosan)

    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.

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  • Preparation of a novel chitosan-g-poly(acrylamide)/Zn ...

    of Partially Hydrolyzed Chitosan-g-poly(Acrylamide) Hydrogels Ali POURJAVADI ∗, Gholam Reza MAHDAVINIA PolymerResearchLaboratory,DepartmentofChemistry,SharifUniversityofTechnology, AzadiAve.,P.O.Box11365-9516,Tehran-IRAN e-mail:[email protected] Received01.02.2006

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  • Superabsorbency, pH-Sensitivity and Swelling Kinetics of ...

    2010-7-22 · A comb-like dual hydrophilic graft chitosan copolymer, chitosan-graft-poly(N-isopropylacrylamide) (CS-g-PNIPAM), was synthesized by means of atom transfer radical polymerization (ATRP) and click chemistry. The thermo-responsive association behavior of the copolymer in dilute aqueous solutions has been investigated by laser light scattering (LLS), zeta potential, and …

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  • Thermo-Responsive Association of Chitosan-graft

    2018-9-15 · Inorganic particles have also been used to confer dual-responsiveness properties to CS-hydrogels. Magnetic- and pH-responsive beads based on chitosan and laponite were reported by Mahdavinia et al. (2018).The beads have shown to be pH-sensitive owing to the −NH 2 groups from CS. They investigated adsorption capacity of BSA as function of pH and Ionic strength.

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  • Chitosan-based hydrogels: From preparation to

    2020-11-15 · Chitosan is a non-toxic, non-carcinogenic, non-immunogenic [] versatile hydrophilic [] and cationic natural polysaccharide.It consists of β-(1–4) linked D-glucosamine and N- acetyl-D-glucosamine units [3,4].It is also known as soluble chitin and obtained from chitin via alkaline deacetylation of the chitin as shown in Fig. 1 [, , ].Chitin consists of unbranched chains of β-(1–4)-2 ...

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  • A review on the synthesis of graft copolymers of

    2020-6-15 · Ren et al. prepared sugarcane bagasse-g-poly(acrylic acid-co-acrylamide) hydrogels obtaining a maximum water absorbency of 269 g∙g −1 in deionized water. In addition, the preparation of superabsorbent polymer/clay composites has received great attention because of their relative low production cost and high-water absorbency [23] , [24] .

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  • Synthesis, Characterization, and Drug Delivery from

    2017-1-24 · 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 ...

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  • A new composite sorbent for water and dye uptake:

    2008-4-23 · Sema Ekici, Gamze Güntekin, Dursun Saraydın, The Removal of Textile Dyes with Cross-Linked Chitosan-Poly(acrylamide) Adsorbent Hydrogels, Polymer-Plastics Technology and Engineering, 10.1080/03602559.2011.574674, 50, 12, (1247-1255), (2011).

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  • Radiation grafting of acrylamide and maleic acid on ...

    The graft copolymerization has been proven as a superior polymerization technique because it combines the functional advantages of the grafted and base polymers. In this work, the radiation-induced grafting of acrylamide (AAm) and maleic acid (MA) onto chitosan (CTS) was developed and optimized by determining the grafting percentage and efficiency as a function of grafting conditions such as ...

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  • Surface Grafted Chitosan Gels. Part I. Molecular

    2021-3-12 · 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 Section 3.3 once the TIRR results are presented.

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  • Research Progress of Chitosan-Based Biomimetic Materials

    2021-6-27 · glycol chitosan (GC), ciprofloxacin (Cip), PDA nanoparticles (NPs) wound healing [38] hydroxybutyl chitosan (HBC), L-dopamine (L-DOPA), -poly-L-lysine (EPL) wound healing [39] The chitosan-based biomimetic materials and the forms of material prepared. Table 1. Proposed applications of chitosan-based materials based on forms.

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  • Superporous hydrogels containing poly(acrylic acid-co ...

    2006-11-21 · Highlighting the impact of chitosan on the development of gastroretentive drug delivery systems. Souza MPC , Sábio RM , Ribeiro TC , Santos AMD , Meneguin AB , Chorilli M Int J Biol Macromol , 159:804-822, 18 May 2020

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  • Poly(N-Isopropyl-Acrylamide)/Poly(γ-Glutamic Acid)

    Methods: 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 ...

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  • Hydrogels Based on Chitosan and Chitosan

    The acrylamide-sodium acrylate hydrogel was synthesized by free radical polymerization of the method of solution polymerization. Dynamic swelling tests were conducted at 25, 40, and 60°C temperatures, in order to investigate the swelling properties of the synthesized hydrogel. The results have shown that swelling content and swelling rate of the hydrogel increase with increasing the swelling ...

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  • Modeling and Investigation of the Swelling Kinetics of ...

    2021-3-12 · Kristian J. Tangso, Hetika Patel, Seth Lindberg, Patrick G. Hartley, Robert Knott, Patrick T. Spicer, and Ben J. Boyd. Controlling the Mesostructure Formation within the Shell of Novel Cubic/Hexagonal Phase Cetyltrimethylammonium Bromide–Poly(acrylamide-acrylic acid) Capsules for pH Stimulated Release.

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  • Preparation and Swelling Behavior of Chitosan/Poly(N

    2010-3-12 · Chitosan-based composite hydrogels covalently cross-linked were obtained by mixing, in different proportions, chitosan (CS) and poly(N-2-aminoethyl acrylamide) (PAEA), both polycations containing primary amine groups in the side chain able to react with glutaraldehyde (GA) as cross-linker. The swelling ratio of composite hydrogels increased with about 50% when the PAEA:CS molar ratio …

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  • Chitosan superporous hydrogel composite-based

    Acrylic acid (AA) and Acrylamide (AM) were chosen as the base monomers for their high water affinity and fast copolymerization velocity, while Chitosan was selected as the second polymer component for its biocompatibility. A floating drug delivery system, which was less dense than gastric juice was described.

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  • Progress, challenges, and opportunities in enhancing

    2019-3-7 · 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 ...

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  • Chitin/Chitosan: Versatile Ecological, Industrial, and ...

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

    2013-7-2 · E?ect of reaction temperature on the apparent viscosity of grafted polyblends AMPN, 0.125%; formic acid, 0.4 g/g chitosan g; M/L ratio 1:25, MAA, 0.55 g/g chitosan, time, 2 h. of grafted/poly(MAA) growing chains as well as homopoly(MAA) chain radicals by

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  • Preparation and characterization of chitosan-based ...

    2018-6-29 · For the synthesis of SPHC of poly (acrylamide-co-acrylic acid), the following substances were added subsequently into a test tube at 25°C: acrylamide 50%; acrylic acid 50%; methylenebisacrylamide 2.5%; span 80 10%; ammo­nium persulphate 20%; tetramethylethylenediamine 20%; chitosan aqueous solution 6%, and 200 mg of sodium bicarbonate as ...

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  • Polyacrylamide degradation and its implications in ...

    2018-9-7 · Acrylamide at a dose of 20 mg/kg/day stimulated the degeneration of peripheral nerves and the spinal cord of rats, although no obvious effects were found at doses less than 0.2 mg/kg/day. 152 ...

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  • Chitosan biopolymer‐derived self‐powered

    2019-5-2 · Chitosan, generally derived from natural chitin after deacetylation with alkaline treatments is primarily composed of glucosamine, 2‐amino‐2‐deoxy‐D‐glucose 47, 48 and can be produced from marine crustacean shells. 49 Chitosan is used in various fields, such as water treatment, 50-53 drug delivery, 54 and tissue engineering. 55 Being ...

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  • polyacrylamide | chemical compound | Britannica

    polyacrylamide, 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.

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  • Chitosan-Graft-Poly(acrylicacid-co-acrylamide ...

    Home Journal of Chitin and Chitosan Science, Volume 2, Number 4 Chitosan-Graft-Poly(acrylicacid-co-acrylamide) Superabsorbent Hydrogel Buy Article: 106.39 + tax (Refund Policy) Authors: Khairkar, S. R.; Raut, A. R. Source: Journal of Chitin and Chitosan Science, Volume 2, Number 4, December ...

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  • Preparation of a novel chitosan-g-poly(acrylamide)/Zn ...

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  • Novel interpenetrating network chitosan

    Preparation, Swelling and Antibacterial Behaviors of N-Succinyl Chitosan-g-Poly(Acrylic Acid-co-Acrylamide) Superabsorbent Hydrogels 来自 KNS 喜欢 0 阅读量: 15 作者: 何广华,KE Wanwan,LIU Liang,LI Ya,郑化,YIN Yihua,YI Ying ...

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  • Preparation and properties of quaternary ammonium

    This paper describes the synthesis of capecitabine-loaded semi-interpenetrating network hydrogel microspheres of chitosan-poly(ethylene oxide-g-acrylamide) by emulsion crosslinking using glutaraldehyde. Poly(ethylene oxide) was grafted with polyacrylamide by free radical polymerization using ceric ammonium nitrate as a redox initiator.

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  • Pourjavadi, A. and Mahdavinia, G.R. (2006)

    Publication date: Available online 6 December 2016 Source:Reactive and Functional Polymers Author(s): Guanghua He, Wanwan Ke, Xiang Chen, Yahui Kong, Hua Zheng, Yihua Yin, Weiquan Cai 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 ...

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  • Preparation and properties of quaternary ammonium

    Pourjavadi, A. and Mahdavinia, G.R. (2006) Superabsorbency, pH-Sensitivity and Swelling Kinetics of Partially Hydrolyzed Chitosan-g-poly(Acrylamide) Hydrogels. Turkish Journal of Chemistry, 30, 595-608.

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  • Polysaccharides | Free Full-Text | Trends of Chitosan ...

    Abstract 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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  • Blending chitosan‐g‐poly(caprolactone) with poly ...

    PNIPAAm (poly(N-isopropyl acrylamide) is widely studied and investigated for its temperature-dependent drug delivery system . The unique property of poly( N -isopropyl acrylamide) lies in its low critical solution temperature (LCST), due to which it is a liquid or soluble form at room temperature while it solidifies to a gel form at the body ...

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  • Hydrogels Based on Chitosan and Chitosan

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  • Studies on removal of Cr(VI) and Cu(II) ions using ...

    2019-7-9 · The adsorption kinetics of chitosan-g-polyacrylonitrile was found to ... The solubilisation occurs by the protonation of the –NH 2 function on the C-2 position of the D-glucosamine repeat unit, where by the polysaccharide is converted to a ... Graft copolymerization of acrylamide on chitosan using ammonium per sulfate as an initiator, was ...

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  • Chitosan: A Natural Biopolymer with a Wide and

    2020-9-1 · From a chemical viewpoint, chitin is a poly(β-(1-4)-N-acetyl-d-glucosamine) with β(14) linkages [], and it is considered to have a cellulose-like structure, where the hydroxyl group in the C2 position has been replaced by an acetamido group (Figure 1).Depending on the orientation of polysaccharide chains, chitin displays three polymorphs, denoted as α, β and γ [].

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  • Acrylamide | FDA

    2021-6-20 · Acrylamide is a chemical that can form in some foods during high-temperature cooking processes, such as frying, roasting, and baking. Acrylamide in food …

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  • Silicone Doped Chitosan-Acrylamide Coencapsulated

    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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  • Progress, challenges, and opportunities in enhancing

    2018-9-7 · Acrylamide at a dose of 20 mg/kg/day stimulated the degeneration of peripheral nerves and the spinal cord of rats, although no obvious effects were found at doses less than 0.2 mg/kg/day. 152 ...

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  • Polyacrylamide degradation and its implications in ...

    The purpose of the paper is to present the synthesis and characterization of hydrogels prepared by free-radical copolymerization of acrylamide and acrylic acid in aqueous solutions using potassium persulfate as initiator and trimethylolpropane trimethacrylate as cross-linker, via the radiation technique. The samples were subjected to electron beam treatment in the dose range of 2 to 4  ...

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  • Electron Beam Synthesis and Characterization of

    2021-7-8 · Chitosan is a sugar that is obtained from the hard outer skeleton of shellfish, including crab, lobster, and shrimp. It is used for medicine. Chitosan is used for high blood pressure, high ...

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  • CHITOSAN: Overview, Uses, Side Effects, Precautions ...

    polyacrylamide, 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.

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  • chitosan-g-poly (acrylicacid-co-acrylamide) composite

    chitosan-g-poly (acrylicacid-co-acrylamide) composite . By Shyam R. Khairkar and Arun R. Raut. Abstract. Adsorption studies for the removal heavy metal b Topics: Chitosan, Superabsorbent, Acrylamide, Acrylic Acid ...

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  • NOVEL SUPERABSORBENT HYDROGEL COMPOSITE

    Poly(acrylamide-co-acrylate) ... reports a decreasing in the water uptake of chitosan-graft-PAN hydrogels as function of the cation charge. 32 This effect was attributed to the complexation ability of those multivalent cations with negatively charged groups of the copolymer based on chitosan, acrylic acid and acrylamide. Here, salts contained ...

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  • Progress, challenges, and opportunities in enhancing

    Acrylic acid (AA) and Acrylamide (AM) were chosen as the base monomers for their high water affinity and fast copolymerization velocity, while Chitosan was selected as the second polymer component for its biocompatibility. A floating drug delivery system, which was less dense than gastric juice was described.

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  • Chitosan superporous hydrogel composite-based

    2018-6-29 · For the synthesis of SPHC of poly (acrylamide-co-acrylic acid), the following substances were added subsequently into a test tube at 25°C: acrylamide 50%; acrylic acid 50%; methylenebisacrylamide 2.5%; span 80 10%; ammo­nium persulphate 20%; tetramethylethylenediamine 20%; chitosan aqueous solution 6%, and 200 mg of sodium bicarbonate as ...

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  • Preparation and characterization of chitosan-based ...

    2014-12-28 · Cassia Grandis Seed Gum-graft-poly(acrylamide)-silica Hybrid: An Excellent Cadmium (II) Adsorbent Vandana Singh 1*, Stuti Tiwari 1, Sadanand Pandey 1, Preeti 1, Rashmi Sanghi 2 . 1 Department of Chemistry, University of Allahabad, Allahabad 211 002, India.

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  • Cassia Grandis Seed Gum-graft-poly(acrylamide)-silica ...

    Summary Conventional EOR polymers are acrylamide-based copolymers. Their viscosity in aqueous solution depends on various physicochemical parameters such as: monomer composition, concentration, average molecular weight, polydispersity, salinity level and ionic composition, temperature… Moreover, solutions are non-Newtonian, they exhibit a Low shear Newtonian plateau viscosity at low shear ...

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  • Universal Viscosifying Behavior of Acrylamide-based ...

    2019-5-2 · Chitosan, generally derived from natural chitin after deacetylation with alkaline treatments is primarily composed of glucosamine, 2‐amino‐2‐deoxy‐D‐glucose 47, 48 and can be produced from marine crustacean shells. 49 Chitosan is used in various fields, such as water treatment, 50-53 drug delivery, 54 and tissue engineering. 55 Being ...

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  • Chitosan biopolymer‐derived self‐powered

    2018-11-23 · Materials. Ammonium persulfate (APS, MW = 228.20), N-isopropylacrylamide (NIPAAm, MW = 113.16), N,N′-methylene-bis-acrylamide (MBA, MW = 154.17), tetramethylenediamine (TEMED, MW = 116.20, d = 0.775 g/ml);triethylamine (MW = 101.19, d = 0.796 g/mL) acryloyl chloride (MW = 90.51, d = 1.114 g/mL) were purchased from Sigma Aldrich. N-methyl pyrrolidone (NMP) was …

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  • Sliding Crosslinked Thermoresponsive Materials ...

    2008-1-1 · In this study, a novel approach to provide thermally sensitive neutral solutions based on chitosan/carboxymethyl cellulose (Ch/CMC) combinations is described. The potential of thermosensitive Ch/CMC as a biomaterial is evaluated for the culture of chondrocytes, with the goal of using the Ch/CMC polymer as an injectable matrix/cell therapeutic.

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