PAMPS/PAA互穿双网络水凝胶的制备及强度研究

通过自由基溶液聚合法和互穿双网络技术(IPDN),合成包含第一网络PAMPS及第二网络PAA的高强度PAMPS/PAA互穿双网络水凝胶(IPDNH),探讨IPDNH的最佳制备条件、抗压缩性能影响因素。结果表明,PAMPS所占比例的提高及PAA交联剂用量的增大都使IPDNH的压缩强度呈现先增大后减小的趋势,而PAMPS交联剂用量的增大,则使压缩强度不断降低。当双网络的单体配比n(AMPS)/n(AA)=3.5/1,PAMPS交联剂用量为2%,引发剂用量为0.2%,PAA交联剂用量为0.5%,引发剂用量0.5%时,IPDNH的抗压缩强度可达58.3MPa,远大于普通水凝胶。

Study on synthesis and anti-compress property of(PAMPS/PAA)interpenetrating polymer double networks hydrogels

The interpenetrating polymer double networks(IPDN) hydrogels made of PAMPS first-net and PAA second-net was synthesized by solution polymerization and interpenetrating polymer double networks technology.Hydrogels compression strength were also studied by different proportion between two networks,the dosage of crosslinking agent and initator within double networks of hydrogels,the results showed that the tendency of compression strength was first enhanced and then was weaken when increasing the dosage of PAA and its crosslinking agent,yet the strength was weaken when the dosage of crosslinking agent of PAMPS was increased.When condition were:n(AMPS)/n(AA)=3.5/1(mass ratio),the PAMPS initator consumption 2wt%,the crosslinker consumption 0.2wt%,the PAA initator consumption 2wt% and the crosslinker consumption 0.2wt%,the compression strenth of hydrogel will get to the maximum of 58.3MPa,far more than usual hydrogels.