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采用溶液聚合法以聚乙烯吡咯烷酮(PVP)为第二网络,以丙烯酸(AA)、4-乙酰基丙烯酰乙酸乙酯(AAEA)为单体制备PVP-P(AAEA-co-AA)半互穿水凝胶(PVP-SIPN),再通过原位还原法合成PVP-P(AAEA-co-AA)/纳米金复合凝胶(GNPs gel),探讨凝胶的溶胀/消溶胀性能、温度及电场敏感性。研究表明,随PVP用量的增加PVP-SIPN溶胀速率减小,平衡溶胀度降低;当PVP用量低于5%凝胶保水率随PVP用量增加而降低,高于5%时保水率随PVP用量增加而增加;PVP-SIPN相转变温度升高,且凝胶温度敏感性随之减弱。纳米金的加入导致凝胶平衡溶胀度从82.3g/g降低至22.66g/g,在电场作用下,外界离子浓度小于0.2mol/L时,GNPs gel发生溶胀;反之,消溶胀,凝胶消溶胀速率随外界电压增大而增大。
PVP-P (AAEA-co-AA) was synthesized by the solution polymerization method using polyvinylpyrrolidone (PVP) as the second network and acrylic acid (AA) and ethyl 4-acetylacryloacetate (AAEA) (PVP-SIPN), and then the PVP-P (AAEA-co-AA) / GNPs gel was synthesized by in situ reduction method. The swelling / deswelling properties, Electric field sensitivity. The results showed that the swelling rate of PVP-SIPN decreased with the increase of PVP content. When PVP content was less than 5%, the water retention rate of PVP decreased with the increase of PVP content. While the phase transition temperature of PVP-SIPN increased, and the gel temperature sensitivity decreased. With the addition of nano-gold, the equilibrium swelling degree of gel decreased from 82.3g / g to 22.66g / g. Under the action of electric field, GNPs gel swelled when the concentration of ions was less than 0.2mol / L. On the contrary, The swelling rate increases with increasing external voltage.