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Flexible and Shape-Reconfigurable Hydrogel Interlocking Adhesives for High Adhesion in Wet Environments Based on Anisotropic Swelling of Hydrogel Microstructures
ACS Macro Letters ( IF 5.1 ) Pub Date : 2017-11-14 00:00:00 , DOI: 10.1021/acsmacrolett.7b00829 Hyun-Ha Park 1 , Minho Seong 1 , Kahyun Sun 1 , Hangil Ko 1 , Sang Moon Kim 2 , Hoon Eui Jeong 1
ACS Macro Letters ( IF 5.1 ) Pub Date : 2017-11-14 00:00:00 , DOI: 10.1021/acsmacrolett.7b00829 Hyun-Ha Park 1 , Minho Seong 1 , Kahyun Sun 1 , Hangil Ko 1 , Sang Moon Kim 2 , Hoon Eui Jeong 1
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This study presents wet-responsive, shape-reconfigurable, and flexible hydrogel adhesives that exhibit strong adhesion under wet environments based on reversible interlocking between reconfigurable microhook arrays. The experimental investigation on the swelling behavior and structural characterization of the hydrogel microstructures reveal that the microhook arrays undergo anisotropic swelling and shape transformation upon contact with water. The adhesion between the interlocked microhook arrays is greatly enhanced under wet conditions because of the hydration-triggered shape reconfiguration of the hydrogel microstructures. Furthermore, wet adhesion monotonically increases with water-exposure time. A maximum adhesion force of 79.9 N cm–2 in the shear direction is obtained with the hydrogel microhook array after 20 h of swelling, which is 732.3% greater than that under dry conditions (i.e., 9.6 N cm–2). A simple theoretical model is developed to describe the measured adhesion forces. The results are in good agreement with the experimental data.
中文翻译：
基于水凝胶微结构各向异性膨胀的柔性和形状可重构水凝胶互锁粘合剂在潮湿环境中的高附着力
本研究提出了基于可重构微钩阵列之间的可逆互锁的湿响应、形状可重构和柔性水凝胶粘合剂，它们在潮湿环境下表现出很强的粘附性。对水凝胶微结构的溶胀行为和结构表征的实验研究表明，微钩阵列在与水接触时会发生各向异性的溶胀和形状转变。由于水凝胶微结构的水合触发形状重构，在潮湿条件下，互锁微钩阵列之间的粘附性大大增强。此外，湿附着力随着水暴露时间的增加而单调增加。最大附着力为 79.9 N cm –2水凝胶微钩阵列在膨胀 20 h 后获得的剪切方向的剪切力比干燥条件下（即 9.6 N cm -2）下的剪切力高 732.3%。开发了一个简单的理论模型来描述测量的粘附力。结果与实验数据吻合良好。
更新日期：2017-11-14
中文翻译：
基于水凝胶微结构各向异性膨胀的柔性和形状可重构水凝胶互锁粘合剂在潮湿环境中的高附着力
本研究提出了基于可重构微钩阵列之间的可逆互锁的湿响应、形状可重构和柔性水凝胶粘合剂，它们在潮湿环境下表现出很强的粘附性。对水凝胶微结构的溶胀行为和结构表征的实验研究表明，微钩阵列在与水接触时会发生各向异性的溶胀和形状转变。由于水凝胶微结构的水合触发形状重构，在潮湿条件下，互锁微钩阵列之间的粘附性大大增强。此外，湿附着力随着水暴露时间的增加而单调增加。最大附着力为 79.9 N cm –2水凝胶微钩阵列在膨胀 20 h 后获得的剪切方向的剪切力比干燥条件下（即 9.6 N cm -2）下的剪切力高 732.3%。开发了一个简单的理论模型来描述测量的粘附力。结果与实验数据吻合良好。
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