High-crystallinity cellulose piezoelectric film and preparation method and application of sensor of high-crystallinity cellulose piezoelectric film

By treating cellulose piezoelectric film raw materials with organic alkali-assisted ultrasonic vibration technology, the problems of biodegradation and low piezoelectric effect of cellulose piezoelectric materials in the existing technology are solved, and a highly crystalline cellulose piezoelectric film is prepared, which improves the sensitivity and self-powering characteristics of the sensor and meets environmental protection requirements.

CN122294829APending Publication Date: 2026-06-26HUZHOU COLLEGE
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Patent Information

Application Number
CN202610392140.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-27
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

When existing synthetic polyvinylidene fluoride (PVDF) and its copolymers are used as flexible piezoelectric materials, they have drawbacks such as difficulty in biodegradation, environmental risks due to high fluorine content, and complex polarization processes. Furthermore, their piezoelectric effect is low, making it difficult to meet the requirements of self-powered, high-resolution, and high-flexibility.

Method used

Natural cellulose piezoelectric membrane raw materials were treated with organic base-assisted ultrasonic vibration technology. By breaking the glycosidic bonds in the amorphous region of cellulose through ultrasound, the crystallinity was improved, the piezoelectric effect of the cellulose piezoelectric membrane was activated, and a highly crystalline cellulose piezoelectric membrane was prepared.

Benefits of technology

It significantly improves the crystallinity and piezoelectric effect of cellulose piezoelectric film, enhances the sensitivity of the sensor, and achieves a combination of self-powered operation and high flexibility, which is in line with the concept of environmental protection.

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Abstract

The invention relates to the technical field of artificial intelligence sensing preparation, in particular to a high-crystallinity cellulose piezoelectric film and a preparation method and application of a sensor of the high-crystallinity cellulose piezoelectric film, and the preparation method comprises the following steps: pretreating a raw material of the cellulose piezoelectric film to obtain a first material; putting the first material into an organic alkali solution, and carrying out ultrasonic treatment to obtain a second material; and drying the second material to obtain the cellulose piezoelectric film. According to the invention, renewable waste fruit and vegetable peel is used as a raw material, and is obtained through an organic alkali-assisted ultrasonic vibration technology, and under the synergistic effect of mild organic alkali and ultrasonic, hemicellulose and cellulose amorphous regions in the fruit and vegetable peel are subjected to local breakage and preferential hydrolysis of glucosidic bonds, so that microstructure recombination is realized, the crystallinity is obviously improved, and the purity of the fruit and vegetable peel is improved. The thin and long crystal fibers in the cellulose layer sheets are stacked more orderly, the number of asymmetric dipoles is increased, controllable crystal region strengthening and structure optimization are achieved, the piezoelectric effect of the cellulose piezoelectric film is greatly activated, and the sensitivity of the sensor is improved.
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