Hemicelluloses are widely used to prepare gel materials because of their renewability, biodegradability, and biocompatibility. Here, molecular chain extension of hemicelluloses was obtained in a two-step process. Composite hydrogels were prepared via free radical graft copolymerization of crosslinked quaternized hemicelluloses (CQH) and acrylic acid (AA) in the presence of crosslinking agent N,...

A CEC monolithic column with strong cation-exchange (SCX) stationary phase based on hydrophilic monomers was prepared by in situ polymerization of acrylamide, methylenebisacrylamide, and 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) in a complete organic binary porogenic solvent consisting of DMSO and dodecanol. The sulfonic groups provided by the monomer AMPS on the surface of the statio...

acrylamide gel. A highly active substance was isolated by ion-exchange chromatography on a 5 % cross-linked polymer ofacrylamide, NN'-methylenebisacrylamide and diethylaminoethyl methacrylate. 2. The initial gel-filtration experiments were carried out under a wide variety of conditions and resulted in the same yield of high-molecularweight and low-molecular-weight fractions with inotropic activ...

We demonstrate a new light-responsive poly(N-isopropylacrylamide) (PNIPAAm) hydrogel nanocomposite incorporating glycidyl methacrylate functionalized graphene oxide (GO–GMA) instead of metallic nanoparticle fillers. GO–GMA is synthesized by esterification with glycidyl methacrylate. GO–GMA incorporated hydrogels are synthesized by photopolymerization of NIPAAm including 4-dimethylaminopyridine ...

In this study, hydrogels were prepared from municipal sludge to recycle and realize the value-added utilization of carbon components in abundant waste material. The sources extracted using synthesised nano CaO2 as an oxidant, graft copolymerised with acrylic acid monomer N, N′-methylenebisacrylamide a crosslinking agent ammonium persulfate initiator. factors influencing hydrogel preparation inv...

Poly (vinylpyridine-N-N-methylenebisacrylamide-acrylicacid) (2-VP-MBAm-AA) was prepared from the reaction of TiO2-methacryloxypropyltrimethoxysilane (TiO2-MAPTMS) with 2-vinylpyridine, methylenbisacrylamide (MBAm) and tert-butyl acrylate (t-BuA). Subsequently (2-VP-MBAm-AA) was reacted with CuI to give the Cu(I) NPs supported onto the above polym...

the nanocomposites of poly (acryl amide-co-acrylic acid) with different contents of naazeolite were prepared using ammonium persulfate as an initiator and n, n′-methylenebisacrylamide as the crosslinker. the morphology was characterized by sem and the structure ofnanocomposite materials was studied with xrd and ft-ir that showed the interaction betweenporous materials and poly (aam-co-aac). the...

The nanocomposites of poly (Acryl amide-co-Acrylic acid) with different contents of NaAzeolite were prepared using ammonium persulfate as an initiator and N, N′-methylenebisacrylamide as the crosslinker. The morphology was characterized by SEM and the structure ofnanocomposite materials was studied with XRD and FT-IR that showed the interaction betweenporous materials and poly (AAm-co-Aac). The...

A novel magnetic hydrogel loaded with graphene oxide (GO) was developed in this study. Firstly, GO prepared from bagasse through a single step via oxidation the presence of ferrocene under muffled atmospheric conditions, followed by loading different amounts magnetite onto co-precipitation reaction iron sheets. Finally, 2-acrylamido-2-methyl-1-propane sulfonic acid grafted carboxymethyl cellulo...

Catalysis by Heteropoly acids (HPAs) and polyoxometalates (POMs) having a higher demand worldwide, as it can be designed to accelerate complex reactions more environmentally friendly. However, recycling of water-soluble solid catalysts remains problem. The synthesis recyclable composite with catalytic properties is the key better use HPAs POMs. Many researches have mentioned method immersing po...