期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 22, 页码 6568-6571出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201803366
关键词
anti-freezing; non-drying; organohydrogels; solvent displacement; tough hydrogels
资金
- National Natural Science Foundation of China [21674064]
- Shenzhen Science and Technology Foundation [JCYJ20160520173802186]
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 degrees C and are stable under ambient conditions or even vacuum.
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