College of Materials Science and Technology, Central South University of Forestry and Technology, Changsha, Hunan, 410004, China.
Central of Hunan Forest Products Quality Inspection and Testing, Changsha, Hunan, 410004, China.
Macromol Rapid Commun. 2018 May;39(10):e1700836. doi: 10.1002/marc.201700836. Epub 2018 Mar 23.
Electrically conductive, yet stimuli-responsive hydrogels are highly desirable for many technological applications. However, the discontinuous conductivity of hydrogels during the response process has become a bottleneck that limits their application. To overcome this constraint, a linearly tunable, electrically conductive hydrogel is prepared using in-situ polymerized polyaniline (PANI) on a CNFs/MEO MA/PEGMA hydrogel (PANI@CMP hydrogel) substrate. The PANI@CMP hydrogel exhibits temperature-tunable electrical conductivity due to the liner relationship between thermosensitivity and temperature of the CMP hydrogel substrate. Furthermore, the stiffness and elasticity of the resultant hydrogel after PANI introduction is enhanced via physical interactions, and the compression load is improved by 42%. A highly sensitive temperature sensor is therefore fabricated with PANI@CMP hydrogel as the flexible induction element, and this sensor achieves temperature monitoring from 20 to 60 °C. This new temperature-controllable conductive hydrogel has excellent mechanical properties, showing great potential for applications in flexible smart sensors, conductive fillers, and medical devices.
具有导电性且对刺激响应的水凝胶在许多技术应用中是非常需要的。然而，水凝胶在响应过程中的不连续导电性已成为限制其应用的瓶颈。为了克服这一限制，使用原位聚合的聚苯胺 (PANI) 在 CNFs/MEO MA/PEGMA 水凝胶 (PANI@CMP 水凝胶) 基底上制备了线性可调、导电的水凝胶。PANI@CMP 水凝胶由于 CMP 水凝胶基底的热敏感性和温度之间的线性关系，表现出温度可调的电导率。此外，通过物理相互作用增强了引入 PANI 后所得水凝胶的刚性和弹性，压缩负载提高了 42%。因此，使用 PANI@CMP 水凝胶作为柔性感应元件制造了一种高灵敏度的温度传感器，该传感器可实现 20 至 60°C 的温度监测。这种新型的温度可控导电水凝胶具有优异的机械性能，在柔性智能传感器、导电填料和医疗器械等领域具有广阔的应用前景。
