HC Plastics News: Recently, the advanced electronic packaging materials innovation research team led by Academician Wang Zhengping and Researcher Sun Rong of the Advanced Materials Research Center of the Shenzhen Institute of Advanced Technology of the Chinese Academy of Sciences has developed a low-cost, high-stretchability, high Flexible tensile tensile strain sensor materials with functional properties such as sensitivity, and successful real-time monitoring of human motion behavior.
Research results "Micro-crack mechanism-based nickel/graphene-coated polyurethane sponge ternary hybrid material prepared by electrodeposition for high-sensitivity wearable flexible strain sensor" published online in the journal Journal of MaterialsChemistryC (DOI:10.1039/ C7tc03636a).
Wearable flexible strain sensor has become the key research direction for the development of smart materials in the future. It has broad application prospects in the fields of human-computer interaction system, electronic skin and human motion behavior monitoring system. Among them, stretchability and sensitivity are important performance indicators of strain sensor materials. How to achieve high stretchability while greatly improving sensitivity is still a challenge.
The team members Han Fei and Zhang Guoping, associate researchers, used polyurethane sponges to obtain conductive graphene-coated polyurethane sponges after several adsorption reduction processes, and then coated with a layer of micro-cracks by electrodeposition. The metal nickel was finally prepared by a flexible polymer encapsulation method to prepare a nickel/graphene coated polyurethane sponge flexible strain sensor.
The preparation method is simple and low in cost, and the electrochemical method is introduced into the preparation of the sensor, thereby improving the sensitivity thereof. The flexible strain sensor has good performance: wide strain range, high sensitivity, fast response time, high reliability (1000 stretching and bending cycles).
In addition, the sensor has been successfully applied to human body finger bending activity monitoring and facial muscle stretching monitoring, which fully demonstrates its good application value in the field of flexible wearable electronic devices. 
Editor in charge: Wang Ning 12
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