期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 47, 页码 53247-53256出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c14935
关键词
ultrastretchable; tough; antifreezing; conductive; wearable strain sensor
资金
- China Scholarship Council Fellowship [201706970002]
- Natural Science Basic Research Plan in Shaanxi Province of China [2020JM420]
- Wisteria Scientific Research Cooperation Special Project
Conductive hydrogels have shown great potential in the field of flexible strain sensors. However, their application is greatly limited due to the low conductivity and poor mechanical properties at subzero temperatures. Herein, an ultrastretchable, tough, antifreezing, and conductive cellulose hydrogel was fabricated by grafting acrylonitrile and acrylamide copolymers onto the cellulose chains in the presence of zinc chloride using ceric ammonium nitrate as the initiator. The resulting hydrogel exhibited ultrastretchability (1730%), excellent tensile strength (160 kPa), high elasticity (90%), good toughness (1074.7 kJ/m(3)), and fatigue resistance property due to the existence of dipole-dipole and multiple hydrogen-bonding interactions on the hydrogel network. In addition, the introduced zinc chloride endowed the cellulose-based hydrogel with remarkable electric conductivity (1.54 S/m) and excellent antifreezing performance (-33 degrees C). Finally, the hydrogel showed high sensitivity and stability to monitor human activities. In summary, this work presented a facile strategy to construct conductive hydrogel with excellent antifreezing and mechanical properties simultaneously, which showed great potential for wearable strain sensors.
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