Lin Yinlei, Zeng Zheng, Li Yuhao, Sun Sheng, Liu Xiaoting, He Deliu, Li Guangji
School of Materials Science and Energy Engineering, Foshan University Foshan Guangdong 528000 China
School of Materials Science and Engineering, South China University of Technology Guangzhou Guangdong 510640 China.
RSC Adv. 2019 Oct 7;9(55):31806-31811. doi: 10.1039/c9ra06728k.
The development of zwitterionic hydrogels possessing both excellent self-healing and mechanical properties is of great significance. Herein, a class of zwitterionic sulfobetaine nanocomposite hydrogels was prepared by UV-initiated copolymerisation of zwitterionic sulfobetaine monomer ,-dimethyl--(3-methacrylamidopropyl)--(3-sulfopropyl) ammonium betaine (DMAPMAPS) and 2-hydroxyethyl methacrylate (HEMA) in the presence of exfoliated clay platelets uniformly dispersed in an aqueous medium. The effects of the hydrogel compositions, including the DMAPMAPS/HEMA mass ratio and the amount of clay, on the self-healing behaviors and mechanical properties of the nanocomposite hydrogels were investigated. The results indicate that the fabricated zwitterionic sulfobetaine nanocomposite hydrogels can autonomously repair incisions or cracks at ambient temperature without the need for any stimulus and possess excellent mechanical properties.
开发兼具优异自愈性能和机械性能的两性离子水凝胶具有重要意义。在此，通过在均匀分散于水介质中的片状黏土存在下，使两性离子磺基甜菜碱单体N,N-二甲基-N-(3-甲基丙烯酰胺基丙基)-N-(3-磺丙基)铵甜菜碱(DMAPMAPS)与甲基丙烯酸羟乙酯(HEMA)进行紫外引发共聚，制备了一类两性离子磺基甜菜碱纳米复合水凝胶。研究了水凝胶组成，包括DMAPMAPS/HEMA质量比和黏土用量，对纳米复合水凝胶自愈行为和机械性能的影响。结果表明，所制备的两性离子磺基甜菜碱纳米复合水凝胶在环境温度下无需任何刺激即可自主修复切口或裂缝，并具有优异的机械性能。
