In this paper, the synthesis of new montmorillonite nanocomposite hydrogel (MMTNH) based on poly (acrylic acid-co-acrylamide) grafted onto starch, is described. Montmorillonite (MMT) as nanometer base, acrylic acid (AA) and acrylamide (AAm) as monomers, ammonium persulfate (APS) as an initiator, N,N-methylenebisacrylamide (MBA) as a crosslinker and starch as a biocompatible polymer were pre...

A pH-responsive hydrogel system was prepared by free radical polymerization of acrylamide and methyl acrylic acid in the presence of N-N′-methylene bisacrylamide. Sodium bicarbonate was further applied as a blowing agent, which afforded a porous hydrogel structure. The hydrogel system achieved a constant super swelling rate within simulated intestinal buffer (~4%/min) and remained relatively st...

Besides its growing impact on the Chemical fiber market, the amine Oxide process, employing a melt of N-methyl-morpholine-N-Oxide (NMMNO) as solvent for cellulose, is both a Stimulus to research in cellulose structure formation from Solution and a catalyst in getting People from fundamental and applied research together for joint effort [ 11. It is well known that cellulosic fibers of the ,,Lyo...

Introduction: This study aimed to assess the potential of poly (acrylic acid)/tricalcium phosphate nanoparticles (PAA/triCaPNPs) scaffold in terms biocompatibility and osteoconductivity properties in-vivo evaluation as well investigate performance PAA/triCaPNPs (with or without exosomes derived from UC-MSCs) for bone regeneration rat critical-sized defect. Methods: was made acrylic acid (AA) mo...

A novel thermo-sensitive superabsorbent hydrogel with saltand pH-responsiveness properties was obtained by grafting of mixtures of acrylic acid (AA) and N-isopropylacrylamide (NIPAM) monomers onto kappa-carrageenan, kC, using ammonium persulfate (APS) as a free radical initiator in the presence of methylene bisacrylamide (MBA) as a crosslinker. Infrared spectroscopy was carried out to confirm t...

A novel 1-naphthylamine (NA) coupled poly(2-hydroxyethyl methacrylate-co-N-methacryloyl-(L)-histidine methyl ester) [NA-PHEMAH] supermacroporous monolithic hydrophobic cryogel was prepared via covalent coupling of NA to PHEMAH for adsorption of lysozyme from aqueous solution. Firstly, PHEMAH monolithic cryogel was prepared by radical cryocopolymerization of HEMA with MAH as a functional comonom...

An approach to synthesizing photopatternable enzymatic degradable dextran hydrogel is presented. The glycidyl methacrylate derivatized dextran (Dex-GMA) was first prepared by reacting dextran with glycidyl methacrylate at 458C with grafting efficiency of 10%. The degree of substitution (DS) was confirmed by H-NMR. Next, Dex-GMA hydrogels were prepared by crosslinking in the presence of a crossl...

BACKGROUND In the available literature, the problem of pH and conductivity in FED is evaluated separately, and limited mainly to the final purity of the synthesized polymer. In this study data from conductivity and pH measurements were evaluated in the context of the structure of the macromolecule. OBJECTIVES The aim of the study was to evaluate the conductivity and pH of dispersions of nanos...

Copolymerization of N-isopropylacrylamide (NIPAM), itaconamic acid (IAM; 4-amino-2-methylene-4-oxobutanoic acid) and β-cyclodextrin was investigated in this study. β-cyclodextrin was at first modified by reacting with allyl glycidyl ether to substitute its OH end groups with moieties containing double bonds to facilitate the subsequent radical copolymerization with NIPAM and IAM. It was reporte...

novel collagen-based hydrogel nanocomposites were synthesized by graft copolymerization of acrylamide and maleic anhydrid in the presence of different amounts of montmorillonite, using methylenebisacrylamide (mba)and ammonium persulfate (aps) as crosslinker and initiator, respectively. the optimum amount of clay on the swelling properties of the samples was studied. it was found that the hydrog...