摘要
以明胶、丙烯酸、N-异丙基丙烯酰胺、N,N′-亚甲基双丙烯酰胺为原料,通过两步辐照法制备了具有温度和pH响应的高强度明胶/聚丙烯酸/聚N-异丙基丙烯酰胺形状记忆水凝胶(GAN)。系统研究了GAN的结构、形貌、力学性能和形状记忆行为。结果表明,GAN具有致密的网络结构,其最高拉伸强度及最大断裂伸长率分别可达(5.4±0.3)MPa和745%。GAN在60℃及pH=12.8的形状恢复所需时间分别为10 s及15 min,形状固定率和形状恢复率均在90%以上,显示出优异的环境响应性能。本工作建立了一种制备环境响应型高强度形状记忆水凝胶的新方法。
A novel gelatin/polyacrylic acid/poly(N-isopropyl acrylamide)shape-memory hydrogel(GAN)with temperature and pH response and high strength was prepared by two-step irradiation method,with gelatin as matrix,acrylic acid(AAc)and N-isopropyl acrylamide(NIPAm)as monomers,and N,N′-methlene bisacrylamide(MBA)as crosslinking agent.The structure,morphology,mechanical properties,and shape-memory behavior of GAN were investigated in detail.The results showed that GAN has a dense network structure,and excellent mechanical properties with the maximum tensile strength up to(5.4±0.3)MPa,and the maximum elongation at break of 745%.GAN’s shape recovery time at 60℃and pH=12.8 can be controlled within 10 s and 15 min,with a shape fixation rate and shape recovery rate above 90%,respectively.This work provides a new method for the preparation of environmentally responsive high-strength shape-memory hydrogels.
作者
陈垦
彭静
李久强
翟茂林
CHEN Ken;PENG Jing;LI Jiuqiang;ZHAI Maolin(Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science,College of Chemistry and Molecular Engineering,Beijing National Laboratory for Molecular Science,Peking University,Beijing 100871,China)
出处
《辐射研究与辐射工艺学报》
CAS
CSCD
2020年第4期25-32,共8页
Journal of Radiation Research and Radiation Processing
基金
国家自然科学基金项目(11875078)资助。
