Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 6, Issue 8, Pages 10595-10605Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.8b01933
Keywords
Spiral structure; Chitin nanocrystals; Strain sensor; Thermal spray; Carbon black
Categories
Funding
- National Natural Science Foundation of China [51473069, 51502113]
- Guangdong Natural Science Funds for Distinguished Young Scholar [S2013050014606]
- Guangdong Special support program [2014TQ01C127]
- Science and Technology PlanningProject of Guangdong Province [2014A020217006]
- Pearl River S&T Nova Program of Guangzhou [201610010026]
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In this research, a new type of conductive composite with high tensile strength, high elasticity, and cost competitiveness has been developed through solution mixing-spraying-rolling methods. Naturel rubber (NR) latex with chitin nanocrystals (ChNCs) as reinforcing filler and carbon black (CB) are thermally sprayed on glass substrate layer by layer, and then, spirally structured conductive composites are obtained by rolling the sheets. When the CB content is 4.44%, the conductivity of the NR/ChNCs-CB composite can reach 6.92 s/m. The tensile strength of 5% ChNCs reinforced conductive composites is 3.47 MPa, which is 3.1 times that of NR-CB composites without ChNCs. The strain sensor exhibits a high gauge factor (GF approximate to 5) and electrical conductivity stability in a small deformation range and still shows good stability and recoverability upon 25%, 50%, and 100% strain. The high-sensitivity strain sensors are further employed for monitoring human activities such as finger movements and pronunciation, which shows good reproducibility and reliability. This study provides a routine of preparing highly stretchable and multifunctional strain sensors based on inexpensive raw materials by a simple manner, which opens up new opportunities for the development of stretchable electronic devices.
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