Cellulose Hydrogels by Reversible Ion‐Exchange as Flexible Pressure Sensors

编号 020024905

推送时间 20200727

研究领域 林产化工 

年份 2020 

类型 期刊 

语种 英语

标题 Cellulose Hydrogels by Reversible Ion‐Exchange as Flexible Pressure Sensors

来源期刊 Advanced Materials Technologies

期 第249期

发表时间 20200706

关键词 cellulose;  hydrogels;  ions exchange;  orientation;  pressure sensing; 

摘要 Inspired by biological camouflage strategy according to the surrounding environment, a facile method to fabricate state‐switchable cellulose hydrogels (fluid, brittle, and rigid hydrogel) driven by Ca2+/Zn2+ ion exchange is reported. The high content of Ca2+ ions leads to the formation of a rigid hydrogel (Gel‐H‐Ca2+) with a great compressive strength (≈2.2 MPa) through coordination cross‐linking network, while Zn2+ ions give the cellulose (Sol‐L‐Zn2+) a fluid state by eliminating the cellulose intermolecular connections, making it possible to obtain injectable and healable hydrogels. Gel‐H‐Ca2+ is highly oriented and anisotropic, and such flexible hydrogel can effectively monitor slight bending and pressure changes of fingers. This cellulose hydrogel will be a promising candidate for bionic and multifunctional sensors.

服务人员 尚玮姣

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