Preparation And Performance Research Of Spinning Membrane Or Hydrogels

In recent years,the issue of environment pollution becomes the focus of the society attention,especially the water pollution which has threatened the health of human is urged to solve.The functional nanomaterials become the research focus because of its outstanding features,such as great specific surface area,porous structure,excellent mechanical strength and small size effect and so on.We designed and synthesized a number of functional nanomaterals,such as PVA/PAA/GO-COOH,PVA/PAA/GO-COOH@TiO2,PAA/Ag/AgNPs.In addition,we also study the catalytic properties of these nanocomposites.We prepared the PVA/PAA/GO-COOH nanomaterals by electrospining.By measuring the morphology and spectrem of the prepared nanomaterals,we find the appropriate electrostatic spinning condition.The water was selected as the solvent during the whole experiment and the added GO-COOH increase the specific surface area of the prepared comeposite materials.Moreover,we also research the the adsorption behavior toward dye.The prepared PVA/PAA/GO-COOH was dipped in the TiO2 slotion so that the TiO2 nanoparticles were anchored on the prepared composite nanofiber membrane due to the H band and electrostatic interaction.Then,the prepared PVA/PAA/GO-COOH@TiO2 composite materials show excellent catalytic performace toward the MB、RhB、CR dyes and the composite materials can be separated from the aqeous solution after reaction in order to reuse.In adttion,we also report the preparation of composite hydrogel materials of poly(acrylic acid)–silver/silver nanoparticles(PAA–Ag/AgNPs)by self-assembly through coordinate bonding and electrostatic interactions,which have the porous structure.Owing to the 3D porous network nanostructures formed,the as-prepared composite hydrogels demonstrated good catalytic capacity towards three model dyes,namely Congo red(CR),rhodamine B(RhB),and methylene blue(MB).The obtained dye removal behavior of the present hydrogels demonstrated good removal capacities and accorded with both a pseudo-rst-order model and a pseudo-second-order model.More importantly,the present obtained hydrogel materials can be prepared in an eco-friendly way,which could be applied on a large scale for removing organic dyes in the process of disposing of sewage.