Physical Organohydrogels With Extreme Strength and Temperature Tolerance
Physical Organohydrogels With Extreme Strength and Temperature Tolerance
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具有极高强度和耐温性的物理有机水凝胶
DOI：
10.3389/fchem.2020.00102
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发表时间：
2020-03
影响因子：
5.5
通讯作者：
Aziz Yasir
中科院分区：
文献类型：
--
作者：
Zhang Jing Wen;Dong Dian Dian;Guan Xiao Yu;Zhang En Mian;Chen Yong Mei;Yang Kuan;Zhang Yun Xia;Khan Malik Muhammad Bilal;Arfat Yasir;Aziz Yasir
具有极高耐温性的坚韧凝胶是一类在零下温度下需要优异综合性能的特定领域具有潜在应用的软材料。在此，物理交联的铕 (Eu)-海藻酸盐/聚乙烯醇 (PVA) 有机水凝胶在远低于 0°C 时不会冻结，同时保留了高应力和拉伸性。这些有机水凝胶是通过将水凝胶聚合物网络中膨胀的水置换为冷冻保护剂（例如乙二醇、甘油和 d-山梨醇）来合成的。由于冷冻保护剂具有较低的蒸气压和冰抑制作用，有机水凝胶膨胀的水-冷冻保护剂二元体系在冷却至-20和-45°C的温度后，弯曲、折叠甚至扭曲后可以恢复到原来的形状。由于多个氢键、配位键和致密聚合物网络的协同作用，物理有机水凝胶表现出最大应力（5.62±0.41 MPa）和应变（7.63±0.02），分别是原始水凝胶的10倍和2倍。基于这些特征，这种具有极高韧性和宽温度耐受性的物理交联有机水凝胶是一种有前途的软材料，扩大了凝胶在更特定和更恶劣条件下的应用。
Tough gel with extreme temperature tolerance is a class of soft materials having potential applications in the specific fields that require excellent integrated properties under subzero temperature. Herein, physically crosslinked Europium (Eu)-alginate/polyvinyl alcohol (PVA) organohydrogels that do not freeze at far below 0°C, while retention of high stress and stretchability is demonstrated. These organohydrogels are synthesized through displacement of water swollen in polymer networks of hydrogel to cryoprotectants (e.g., ethylene glycol, glycerol, and d-sorbitol). The organohydrogels swollen water-cryoprotectant binary systems can be recovered to their original shapes when be bent, folded and even twisted after being cooled down to a temperature as low as −20 and −45°C, due to lower vapor pressure and ice-inhibition of cryoprotectants. The physical organohydrogels exhibit the maximum stress (5.62 ± 0.41 MPa) and strain (7.63 ± 0.02), which is about 10 and 2 times of their original hydrogel, due to the synergistic effect of multiple hydrogen bonds, coordination bonds and dense polymer networks. Based on these features, such physically crosslinked organohydrogels with extreme toughness and wide temperature tolerance is a promising soft material expanding the applications of gels in more specific and harsh conditions.
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基于双网络有机凝胶的极其可拉伸、稳定且耐用的应变传感器
影响因子：
9.5
作者：
Zhang Haoxiang;Niu Wenbin;Zhang Shufen
通讯作者：
Zhang Shufen
影响因子：
11.2
作者：
Pang Zhu;Yonghong Deng;Chaoyang Wang
通讯作者：
Pang Zhu;Yonghong Deng;Chaoyang Wang
影响因子：
5.5
作者：
Wang W;Narain R;Zeng H
通讯作者：
Zeng H
DOI：
10.3390/molecules23051017
发表时间：
2018-04-26
期刊：
Molecules (Basel, Switzerland)
影响因子：
--
作者：
Han J;Zhao X;Xu W;Wang W;Han Y;Feng X
通讯作者：
Feng X
影响因子：
16.6
作者：
Gao, Yang;Song, Jingfeng;Li, Shumin;Elowsky, Christian;Zhou, You;Ducharme, Stephen;Chen, Yong Mei;Zhou, Qin;Tan, Li
通讯作者：
Tan, Li