Preparation And Properties Of Polymer Based Composite Hydrogel

Hydrogel is a functional polymer material with three-dimensional network structure.Due to its excellent properties such as water absorption and water retention,hydrogels have great application value in the fields of drug carriers,biomedicine and the like.In this paper,nano-silicon particles(F-SiNPs)were prepared by photocatalysis,and graphene oxide(GO)was prepared by the Hummers method,then as the inorganic substance added to traditional hydrogels,preparate intelligently organic/inorganic hydrogels to improve the strength of the traditional hydrogel,thermal stability and so on.Details as follows:F-SiNPs/PAM nanocomposite hydrogel was prepared by using acrylamide(AM)as monomer,N,N-methylenebisacrylamide(MBA)as crosslinking agent and ammonium persulfate(APS)as initiator in F-SiNPs aqueous solution.The presence of F-SiNPs inorganic particles confers gel fluorescence while still possesses strong pH sensitivity.SA/GO/PAM composite hydrogel was prepared by free radical polymerization in GO aqueous solution using alginate(SA),acrylamide(AM)as monomer,MBA as crosslinking agent and APS as initiator.Compared with pure PAM hydrogel,the addition of GO enhanced the mechanical properties of hydrogel and improved the thermal stability.PNIPAM/GO/PAM composite hydrogel was prepared in aqueous solution of GO with N-isopropylacrylamide(NIPAM),AM as monomer,MBA as crosslinking agent and APS as initiator.The swelling ratio and dewatering resistance of composite hydrogel were studied.The morphological characteristics of the hydrogel were characterized.The results show that the hydrogel has good temperature sensitivity and excellent mechanical properties.With NIPAM as monomer,by RAFT method on the surface of nano-silicon to prepare polymer temperature-sensitive hydrogel to avoid agglomeration effect of nano-particles.Characterization of the structural characteristics of polymer materials and fluorescence properties by ’H NRM and IR,but the results are not as perfect as expected.