文献类型：期刊文献

英文题名：Anti-Freezing Nanocomposite Organohydrogels with High Strength and Toughness

作者：Zheng, Huijuan[1];Huang, Qiqi[1];Lu, Meijun[1];Fu, Jiaxin[1];Liang, Zhen[1];Zhang, Tong[1];Wang, Di[1];Li, Chengpeng[1]

机构：[1]Guangdong Ocean Univ, Sch Chem & Environm Sci, Zhanjiang 524088, Peoples R China

年份：2022

卷号：14

期号：18

外文期刊名：POLYMERS

收录：SCI-EXPANDED(收录号：WOS:000856800300001)、、EI(收录号：20224012817657)、Scopus(收录号：2-s2.0-85138774013)、WOS

基金：This research was funded by the Research Start-up Fund of Guangdong Ocean University (No. R20035), Zhanjiang Non-funded Science and Technology Project (No. 2021B01099), Innovation and Entrepreneurship Training Program for College Students in Guangdong Province (No. 010403122108).

语种：英文

外文关键词：nanocomposite; organohydrogels; anti-freezing; solvent replacement; high strength

外文摘要：Hydrogels based on nanocomposites (NC) structure have acquired a great deal of interest, but they are still limited by relatively low mechanical strength, inevitably losing elasticity when applied below subzero temperatures, due to the formation of ice crystallization. In this study, an anti-freezing and mechanically strong Laponite NC organohydrogel was prepared by a direct solvent replacement strategy of immersing Laponite NC pre-hydrogel into ethylene glycol (EG)/water mixture solution. In the organohydrogel, a part of water molecules was replaced by EG, which inhibited the formation of ice crystallization even at extremely low temperatures. In addition, the formation of hydrogen bonds between Laponite and the monomers of N-isopropylacrylamide (NIPAM) and hydroxyethyl acrylate (HEA) endowed the organohydrogels with high mechanical strength and toughness. The NC organohydrogel can maintain its mechanical flexibility even at -25 degrees C. The compressive stress, tensile stress, and elongation at the break of N5H5L reached 3871.71 kPa, 137.05 kPa, and 173.39%, respectively, which may be potentially applied as ocean probes in low temperature environment.