Poly(DMAM-co-AA)水凝胶的合成

Synthesis of Poly(DMAM-co-AA) Hydrogels

以N,N-二甲基丙烯酰胺(DMAM)与丙烯酸(AA)为单体,N,N-亚甲基双丙烯酰胺(NMBA)为交联剂,过硫酸铵为引发剂,采用水溶液聚合法合成了DMAM和AA的共聚物水凝胶。实验证明,加热温度、引发剂用量和反应体系中单体总浓度对聚合产物的吸水能力没有明显影响,但随着对反应溶液的加热温度升高、引发剂用量增大、单体总质量分数增大,聚合反应能够达到的最高温度就越高,达到最高温度的时间缩短。DMAM和AA的物质的量比偏离1越远,水凝胶的吸水能力越强。交联剂的质量分数为0.5%时,水凝胶的吸水能力最大。

Copolymer hydrogel of N,N-dimethylacrylamide（DMAM） and acrylic acid（AA） was synthesized by aqueous solution polymerization using DMAM and AA as monomers,and N,N-methylene bisacrylamide（NMBA） as crosslinking agent,ammonium persulfate as initiator.The results show that the temperature,initiator amount and monomer have no obvious effect on water absorption ability of the polymerization product.When the temperature,initiator amount and monomer mass fraction increase,the maximum temperature of the polymerization reaction increases,and the polymerization initiation time becomes shorter.When the mole ratio of DMAM and AA is more far away from 1,the absorption ability of the hydrogel is stronger.When the crosslinking agent mass fraction is 0.5%,the water absorption ability of the hydrogel is the maximum.