Highly Stretchable and Compressible Cellulose Ionic Hydrogels for Flexible Strain Sensors

编号 020021403

推送时间 20191125

研究领域 林产化工 

年份 2019 

类型 期刊 

语种 英语

标题 Highly Stretchable and Compressible Cellulose Ionic Hydrogels for Flexible Strain Sensors

来源期刊 Biomacromolecules

期 第214期

发表时间 20190417

关键词 Cellulose Ionic Hydrogels;  Flexible Strain Sensors; 

摘要 Stretchable and compressible hydrogels based on natural polymers have received immense considerations for electronics. The feasibility of using pure natural polymer-based hydrogels could be improved if their mechanical behaviors satisfy the requirements of practical applications. Herein, we report highly stretchable (tensile strain ～126%) and compressible (compression strain ～80%) cellulose ionic hydrogels (CIHs) among pure natural polymer-based hydrogels including cellulose, chitin, and chitosan via chemical cross-linking based on free radical polymerization of allyl cellulose in NaOH/urea aqueous solution. In addition, the hydrogels have good transparency (transmittance of ～89% at 550 nm) and ionic conductivity (～0.16 mS cm–1) and can be worked at ?20 °C without freezing and visual loss of transparency. Moreover, the CIHs can serve as reliable and stable strain sensors and have been successfully used to monitor human activities. Significantly, the various properties of hydrogel can be controlled through rationally adjusting the chemically cross-linked density. Our methodology will prove useful in developing the satisfied mechanical and transparent CIHs for a myriad of applications in flexible electronics.

服务人员 尚玮姣

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