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Highly Swellable and Stretchable Thermoresponsive Hydrogels Enabled by Functionalized Boron Nitride Nanosheets
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2020-08-16 , DOI: 10.1002/mame.202000256 Meiling Guo 1 , Jin Du 1 , Junyao Zhang 1 , Yuanpeng Wu 1, 2 , Shishan Xue 1 , Xi Yang 1 , Zhenyu Li 1 , Hongwei Zhou 3 , Weiwei Lei 4
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2020-08-16 , DOI: 10.1002/mame.202000256 Meiling Guo 1 , Jin Du 1 , Junyao Zhang 1 , Yuanpeng Wu 1, 2 , Shishan Xue 1 , Xi Yang 1 , Zhenyu Li 1 , Hongwei Zhou 3 , Weiwei Lei 4
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Thermoresponsive hydrogels with high stretchability and large swelling ratio are promising materials for fabricating soft devices, sensors, artificial muscles, etc. However, it remains a challenge to achieve these properties simultaneously within one hydrogel. Herein, highly swellable and stretchable thermoresponsive hydrogels are developed by incorporating functionalized boron nitride nanosheets (f‐BNNSs) into poly(maleic anhydride functionalized β‐cyclodextrin‐co‐N‐isopropylacrylamide) hydrogel. In such hydrogels, the dynamic host–guest interactions between f‐BNNSs and polymer matrix act as sacrificial bonds to efficiently dissipate energy, and the homogeneous covalent cross‐linking network of polymer leads to a smooth stress propagation, which enables the hydrogels to obtain excellent mechanical properties, such as remarkable strength (up to 0.15 MPa) and outstanding stretchability (up to 1457%). What is more, the resultant hydrogel also exhibits excellent thermoresponsive properties (swelling rate up to 5000% at 25 °C and deswelling rate down to 6% at 50 °C). Thus, this work offers a promising strategy to fabricate highly swellable and stretchable thermoresponsive hydrogels for potential soft actuators and bionic robotics applications.
中文翻译：
通过功能化氮化硼纳米片实现的高度膨胀和可拉伸的热响应水凝胶
具有高拉伸性和大溶胀率的热敏水凝胶是用于制造软装置，传感器，人造肌肉等的有前途的材料。然而，在一种水凝胶中同时实现这些性能仍然是一个挑战。在此，高度可溶胀和可拉伸的温敏水凝胶是通过将官能化氮化硼纳米片（F-BNNSs）到聚（马来酸酐官能化β-cyclodextrin-开发共- ñ-异丙基丙烯酰胺）水凝胶。在这种水凝胶中，f-BNNS和聚合物基质之间的动态主客体相互作用是牺牲键，可以有效地耗散能量，聚合物的均质共价交联网络可导致应力传播的平稳进行，从而使水凝胶能够获得出色的机械性能，例如出色的强度（高达0.15 MPa）和出色的拉伸性（高达1457％）。而且，所得水凝胶还表现出优异的热响应性（在25℃下的溶胀率高达5000％，在50℃下的溶胀率高达6％）。因此，这项工作为制造潜在的软致动器和仿生机器人应用提供了高度可膨胀和可拉伸的热响应水凝胶的有前途的策略。
更新日期：2020-10-12
中文翻译：
通过功能化氮化硼纳米片实现的高度膨胀和可拉伸的热响应水凝胶
具有高拉伸性和大溶胀率的热敏水凝胶是用于制造软装置，传感器，人造肌肉等的有前途的材料。然而，在一种水凝胶中同时实现这些性能仍然是一个挑战。在此，高度可溶胀和可拉伸的温敏水凝胶是通过将官能化氮化硼纳米片（F-BNNSs）到聚（马来酸酐官能化β-cyclodextrin-开发共- ñ-异丙基丙烯酰胺）水凝胶。在这种水凝胶中，f-BNNS和聚合物基质之间的动态主客体相互作用是牺牲键，可以有效地耗散能量，聚合物的均质共价交联网络可导致应力传播的平稳进行，从而使水凝胶能够获得出色的机械性能，例如出色的强度（高达0.15 MPa）和出色的拉伸性（高达1457％）。而且，所得水凝胶还表现出优异的热响应性（在25℃下的溶胀率高达5000％，在50℃下的溶胀率高达6％）。因此，这项工作为制造潜在的软致动器和仿生机器人应用提供了高度可膨胀和可拉伸的热响应水凝胶的有前途的策略。
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