A Temperature‐Controlled, Conductive PANI@CNFs/MEO2MA/PEGMA Hydrogel for Flexible Temperature Sensors. Issue 10 (23rd March 2018)

• Record Type: Journal Article
• Authors: Liu, Liu; Luo, Sha; Qing, Yan; Yan, Ning; Wu, Yiqiang; Xie, Xinfeng; Hu, Feiyu
• Is Part Of: Macromolecular rapid communications. Volume 39:Issue 10(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-03-23
• Subjects: flexible temperature sensors -- intelligent hydrogels -- linearly tunable electronic conductivity; Macromolecules -- Periodicals; Polymers -- Periodicals; Chemistry -- Periodicals; 547.705
• DOI: 10.1002/marc.201700836
• Languages: English
• ISSNs: 1022-1336

Abstract

Abstract: 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/MEO2 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. Abstract : A linearly tunable electronic conductive hydrogel is prepared by in‐situ polymerized polyaniline (PANI) on CNFs/MEO2 MA/PEGMA hydrogel substrate (PANI@CMP hydrogel). The PANI@CMP hydrogel exhibits temperature‐tunable electric conductive property from 20 to 65 °C. Based on this characteristic, a facile and remarkable temperature sensor with PANI@CMP hydrogel as the flexible induction element is fabricated, achieving temperature monitoring.