高度坚韧且快速自愈的双物理交联聚（N,N-二甲基丙烯酰胺-丙烯酰胺）水凝胶。
Highly tough and rapid self-healing dual-physical crosslinking poly(DMAA--AM) hydrogel.
作者信息
Lin Yinlei, Wang Shuoqi, Sun Sheng, Liang Yaoheng, Xu Yisheng, Hu Huawen, Luo Jie, Zhang Haichen, Li Guangji
机构信息
School of Materials Science and Hydrogen Energy, Foshan University Foshan Guangdong 528000 P. R. China
Guangdong Key Laboratory for Hydrogen Energy Technologies Foshan 528000 P. R. China.
出版信息
RSC Adv. 2021 Oct 7;11(52):32988-32995. doi: 10.1039/d1ra05896g. eCollection 2021 Oct 4.
Introducing double physical crosslinking reagents (, a hydrophobic monomer micelle and the LAPONITE® XLG nano-clay) into the copolymerization reaction of hydrophilic monomers of ,-dimethylacrylamide (DMAA) and acrylamide (AM) is reported here by a thermally induced free-radical polymerization method, resulting in a highly tough and rapid self-healing dual-physical crosslinking poly(DMAA--AM) hydrogel. The mechanical and self-healing properties can be finely tuned by varying the weight ratio of nanoclay to DMAA. The tensile strength and elongation at break of the resulting nanocomposite hydrogel can be modulated in the range of 7.5-60 kPa and 1630-3000%, respectively. Notably, such a tough hydrogel also exhibits fast self-healing properties, , its self-healing rate reaches 48% and 80% within 2 and 24 h, respectively.
本文报道了通过热引发自由基聚合法将双物理交联剂（一种疏水性单体胶束和LAPONITE® XLG纳米粘土）引入N，N-二甲基丙烯酰胺（DMAA）和亲水性单体丙烯酰胺（AM）的共聚反应中，从而得到一种高韧性且快速自愈的双物理交联聚（DMAA-AM）水凝胶。通过改变纳米粘土与DMAA的重量比，可以精细调节其机械性能和自愈性能。所得纳米复合水凝胶的拉伸强度和断裂伸长率分别可在7.5-60 kPa和1630-3000%的范围内调节。值得注意的是，这种坚韧的水凝胶还具有快速自愈性能，即其自愈率在2小时和24小时内分别达到48%和80%。
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