Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Linggong Road #2, 116023 Dalian, China.
Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Linggong Road #2, 116023 Dalian, China.
Carbohydr Polym. 2022 Oct 15;294:119775. doi: 10.1016/j.carbpol.2022.119775. Epub 2022 Jun 26.
A series of chitosan (CS)-konjac glucomannan (KGM) foams with excellent thermal insulation property has been prepared using a directional freezing method, which exhibit high strain recovery, excellent piezoelectric generation and sensing properties. Layered lamellar or honeycomb morphologies in CS-KGM foams attributes a low thermal conductivity coefficient of ca. 0.03 W/(m·K). Bridge-like structure that mainly observed in CS-KGM foams from horizontal freezing endows them with excellent compression recovery performance even after 200 compression cycles. This along with piezoelectricity of CS contributes a long-lasting piezoelectric generation performance, ranging from 0.809 to 2.460 V during compression cycle process. Piezoelectric signals generated from pressing with certain strain and rate, finger taping and hand grasping can be sensed profoundly by CS-KGM. As thus, fully renewable source-based CS-KGM foams with outstanding thermal insulation and piezoelectric performance shows great potential in application as wearable thermal insulation and piezoelectric devices.
已使用定向冻结法制备了具有优异隔热性能的一系列壳聚糖 (CS)-魔芋葡甘聚糖 (KGM) 泡沫，其表现出高应变恢复、优异的压电发电和传感性能。CS-KGM 泡沫中的层状层状或蜂窝状形态导致导热系数约为 0.03 W/（m·K）。主要在水平冻结的 CS-KGM 泡沫中观察到的桥状结构使它们具有出色的压缩恢复性能，即使经过 200 次压缩循环也是如此。这与 CS 的压电性一起贡献了持久的压电发电性能，在压缩循环过程中范围从 0.809 到 2.460 V。可以通过 CS-KGM 深刻地感应到通过一定应变和速率按压、手指敲击和手抓产生的压电信号。因此，具有出色隔热和压电性能的完全可再生资源基 CS-KGM 泡沫在可穿戴隔热和压电设备中的应用具有巨大潜力。
