自愈水凝胶
材料科学
韧性
化学工程
聚丙烯酰胺
复合材料
低温保护剂
溶剂
制作
甘油
高分子化学
化学
有机化学
低温保存
工程类
病理
细胞生物学
生物
胚胎
替代医学
医学
作者
Fan Chen,Dan Zhou,Jiahui Wang,Tianzhen Li,Xiaohu Zhou,Tiansheng Gan,Stephan Handschuh‐Wang,Xuechang Zhou
标识
DOI:10.1002/anie.201803366
摘要
Abstract Tough hydrogels, polymeric network structures with excellent mechanical properties (such as high stretchability and toughness), are emerging soft materials. Despite their remarkably mechanical features, tough hydrogels exhibit two flaws (freezing around the icing temperatures of water and drying under arid conditions). Inspired by cryoprotectants (CPAs) used in the inhibition of the icing of water in biological samples, a versatile and straightforward method is reported to fabricate extreme anti‐freezing, non‐drying CPA‐based organohydrogels with long‐term stability by partially displacing water molecules within the pre‐fabricated hydrogels. CPA‐based Ca‐alginate/polyacrylamide (PAAm) tough hydrogels were successfully fabricated with glycerol, glycol, and sorbitol. The CPA‐based organohydrogels remain unfrozen and mechanically flexible even up to −70 °C and are stable under ambient conditions or even vacuum.
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