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A Smart Design Strategy for Super-Elastic Hydrogel with Long-Term Moisture, Extreme Temperature Resistance, and Non-Flammability
Advanced Science ( IF 14.3 ) Pub Date : 2021-06-19 , DOI: 10.1002/advs.202100320 Haiquan Zhang 1 , Zijing Liu 1 , Junping Mai 1 , Ning Wang 1 , Houji Liu 1 , Jie Zhong 1 , Xianmin Mai 2
Advanced Science ( IF 14.3 ) Pub Date : 2021-06-19 , DOI: 10.1002/advs.202100320 Haiquan Zhang 1 , Zijing Liu 1 , Junping Mai 1 , Ning Wang 1 , Houji Liu 1 , Jie Zhong 1 , Xianmin Mai 2
Affiliation
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Elastic hydrogel is a promising material category for designing biological muscles, repairable building materials, flexible electronic devices, and vulcanized rubber substitutes, which is required to have a long life, good self-healing performance and extreme temperature tolerance. Herein, a super-elastic mineral hydrogel is developed with long-lasting moisture, based on dynamic physical crosslinking between hydrated calcium ion clusters and amide groups of polyacrylamide (PAM). The complex hydrogel exhibits a super stretchability of 13 600% at room temperature, and can maintain the super flexibility in a wide temperature range of −40–50 °C or for a long period of 28 days. Particularly, the soft material cannot be ignited under an open flame at 400–500 °C, because of coupling dual flame retardant mechanisms containing the endothermic effect of liquid water evaporation and the barrier effect of calcium mineral salt on oxygen. In conclusion, the novel complex hydrogel with excellent tensile property, stability in extreme temperature or long operating time, and flame retardancy may become a promising candidate in the fields of agriculture, food, construction, medicine, and machinery.
中文翻译：
具有长期保湿、耐极端温度和不可燃性的超弹性水凝胶的智能设计策略
弹性水凝胶是一种很有前景的材料类别，可用于设计生物肌肉、可修复建筑材料、柔性电子设备和硫化橡胶替代品，要求其具有长寿命、良好的自愈性能和极端温度耐受性。在此，基于水合钙离子簇和聚丙烯酰胺（PAM）酰胺基团之间的动态物理交联，开发了一种具有持久保湿性的超弹性矿物水凝胶。该复合水凝胶在室温下表现出13600%的超强拉伸性，并能在-40~50℃的宽温度范围内或长达28天的时间内保持超强的柔韧性。特别是，由于液态水蒸发的吸热效应和钙矿物盐对氧气的阻隔效应的双重阻燃机制的耦合，软质材料在400-500℃的明火下无法点燃。总之，新型复合水凝胶具有优异的拉伸性能、极端温度稳定性或较长的使用时间以及阻燃性，可能成为农业、食品、建筑、医药和机械领域的有前途的候选者。
更新日期：2021-08-19
中文翻译：
具有长期保湿、耐极端温度和不可燃性的超弹性水凝胶的智能设计策略
弹性水凝胶是一种很有前景的材料类别，可用于设计生物肌肉、可修复建筑材料、柔性电子设备和硫化橡胶替代品，要求其具有长寿命、良好的自愈性能和极端温度耐受性。在此，基于水合钙离子簇和聚丙烯酰胺（PAM）酰胺基团之间的动态物理交联，开发了一种具有持久保湿性的超弹性矿物水凝胶。该复合水凝胶在室温下表现出13600%的超强拉伸性，并能在-40~50℃的宽温度范围内或长达28天的时间内保持超强的柔韧性。特别是，由于液态水蒸发的吸热效应和钙矿物盐对氧气的阻隔效应的双重阻燃机制的耦合，软质材料在400-500℃的明火下无法点燃。总之，新型复合水凝胶具有优异的拉伸性能、极端温度稳定性或较长的使用时间以及阻燃性，可能成为农业、食品、建筑、医药和机械领域的有前途的候选者。
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