High-strength, Self-healable, Temperature-sensitive, MXene-containing Composite Hydrogel as a Smart Compression Sensor
High-strength, Self-healable, Temperature-sensitive, MXene-containing Composite Hydrogel as a Smart Compression Sensor
复制标题
高强度、可自修复、温度敏感、含 MXene 的复合水凝胶作为智能压力传感器
DOI：
10.1021/acsami.9b16078
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发表时间：
2019
影响因子：
9.5
通讯作者：
Rong Ran
中科院分区：
文献类型：
--
作者：
Yulin Zhang;KaiXuan Chen;Yueshan Li;Ji Lan;Bin Yan;Lingying Shi;Rong Ran
MXene作为一种类似石墨烯的新型二维材料，由于其优异的力学性能、导电性和导热性，在超级电容器等电化学材料领域引起了广泛的关注。比石墨烯更好的是，经过适当处理得到的少层MXene材料具有良好的水分散性，可以作为理想的纳米材料来增强水凝胶的导电性。然而，利用少层MXene材料制备复合水凝胶的文章很少。本文采用Yury温和法合成了MXene。以聚n -异丙基丙烯酰胺（PNIPAM）水凝胶和物理交联水凝胶为基体，制备了具有温度敏感和应力敏感性能的复合水凝胶。复合水凝胶表现出优异的力学性能，可拉伸至原来长度的14倍以上，抗拉强度达到0.4 MPa，同时具有良好的自愈能力，这对水凝胶的实际应用具有重要意义。复合水凝胶的电导率为1.092 S/m，是不含MXene的对照水凝胶的15倍左右。电导率测试也验证了复合水凝胶作为智能压缩传感器的潜力。
As a new two-dimensional material similar to graphene, MXene has attracted extensive attention in the field of electrochemical materials such as supercapacitors because of its excellent mechanical properties, electrical conductivity, and thermal conductivity. What is better than graphene is that the few-layer MXene material obtained by proper treatment has good water dispersibility and can be used as an ideal nanomaterial to enhance the conductivity of hydrogels. However, the articles about the few-layer MXene material used in the preparation of composite hydrogels are rare. In this paper, MXene was synthesized by Yury mild method. Poly(N-isopropyl acrylamide) (PNIPAM) hydrogel and physical cross-linking hydrogel were used as the matrix to prepare composite hydrogels with temperature sensitivity and stress-sensing properties. The composite hydrogels exhibited excellent mechanical properties: it could be stretched to over 14 times the original length and achieved a 0.4 MPa tensile strength while showing good self-healing ability, which was of great significance for the practical application of hydrogels. The conductivity of the composite hydrogel was 1.092 S/m, which was about 15 times that of the control hydrogel without MXene. The potential of the composite hydrogel as a smart compression sensor was also verified by the conductivity tests.