摘要
以丙烯酰胺(AM)、N-异丙基丙烯酰胺(NIPAM)为单体,过硫酸铵(APS)-亚硫酸氢钠(SBS)为氧化-还原引发体系,N,N'-亚甲基双丙烯酰胺(BIS)为交联剂,制备了亲水型温敏凝胶P(NIPAM-co-AM)。研究了投料比m(AM)/m(NIPAM)对凝胶性能的影响。结果表明,随着凝胶体系中亲水单体AM比例的增大,共聚凝胶溶胀率、保水率、硬度均提高。当AM质量分数从0增大到100%时,凝胶硬度从84.929 g增为1 252.222 g。DSC表明,当AM质量分数从2%提高到10%时,凝胶LCST从38.61℃增加到57.95℃。随着AM比例降低,凝胶LCST向低温方向移动,相变范围温敏性越好。
Thermo-responsive hydrogels were synthesized from N-isopropylacrylamide （NIPAM） and acrylamide （ AM ） with N, N＇-methylenebisacrylamide （ BIS ） as crosslinker, and ammonium potassium and sodium bisulfite as initiators. The effect of the change of feed composition of AM/NIPAM on the properties were studied. The results show that, with the increase of hydrophilic monomer AM, the swelling ratio, water retention and hardness of P （NIPAM-co-AM） are enhanced. The hardness increases from 84. 929 g in absence of AM to 1 252. 222 g when AM is 100%. According to DSC ,when the dosage of AM increases from 2% to 10%, the LCST of P （NIPAM-co-AM） gel increases from 38.61 ℃ to 57.95 ℃. With the decrease of AM content, LCST of P（NIPAM-co-AM） gel declines, and responsiveness is improved.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2013年第3期259-263,共5页
Fine Chemicals
基金
国家自然科学基金(21174055)
333高层次人才培养工程(BRA2011184)
六大人才高峰高层次人才项目(2012XCL-007)~~
