期刊
BIOMACROMOLECULES
卷 22, 期 12, 页码 5033-5041出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.biomac.1c01003
关键词
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资金
- National Natural Science Foundation of China [32171706]
- Key Laboratory of Bio-based Material Science & Technology (Northeast Forestry University), Ministry of Education [SWZ-ZD201906]
Research on anisotropic hydrogels is increasing due to their unique properties. A gradient anisotropic carboxymethyl cellulose hydrogel was prepared by directionally diffusing aluminum ions, showing good sensing performance and potential for monitoring tiny human movements with a strain sensor. This hydrogel-based strain sensor can be widely used in human-computer intelligence, human-computer interaction, and wearable devices in the future.
Recently, because of the unique properties of anisotropic and isotropic structures, there are more research studies on anisotropic hydrogels. We prepared a gradient anisotropic carboxymethyl cellulose hydrogel (CMC-Al3+) by directionally diffusing aluminum chloride solution. The orientation of carboxymethyl cellulose (CMC) chains is perpendicular to the direction of aluminum ion diffusion. The degree of cross-linking and orientation gradually decrease along the direction of aluminum ion diffusion. Compared with anisotropic hydrogels prepared by other methods, the hydrogels prepared by directionally diffusing aluminum ion solution have a gradient lamellar structure. Because of the large amount of aluminum ions in CMC-Al3+, the hydrogel shows good sensing performance. CMC-Al3+ is packaged with PVC electrical flame retardant tape to produce a strain sensor used to detect human tiny movements, which can accurately and stably monitor tiny movements. Hydrogel-based strain sensors can be widely used in the fields of human-computer intelligence, human-computer interaction, and wearable devices in the future.
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