电纺纳米纤维基柔性压力传感器的制备及性能研究

doi:10.3969/j.issn.0253-2417.2022.05.001

林产化学与工业 ›› 2022, Vol. 42 ›› Issue (5): 1-7.doi: 10.3969/j.issn.0253-2417.2022.05.001

电纺纳米纤维基柔性压力传感器的制备及性能研究

李翠环¹, 陈胜¹^,², 毛健贞², 牟佳慧¹, 邵自强³, 许凤¹^,*()

1. 北京林业大学林木生物质化学北京市重点实验室，北京 100083
2. 齐鲁工业大学(山东省科学院) 生物基材料与绿色造纸国家重点实验室，山东济南 250353
3. 北京理工大学北京市纤维素及其衍生材料工程技术研究中心，北京 100081

收稿日期:2021-07-27 出版日期:2022-10-28 发布日期:2022-11-02
通讯作者: 许凤 E-mail:xfx315@bjfu.edu.cn
作者简介:许凤，教授，博士生导师，研究领域为林木生物质资源高值利用；E-mail: xfx315@bjfu.edu.cn
李翠环(1998—)，女，山东菏泽人，硕士生，主要从事纤维素衍生物功能化利用研究工作
基金资助:
北京林业大学热点追踪资助项目(2021BLRD07);生物基材料与绿色造纸国家重点实验室开放基金资助项目(GZKF202029)

Preparation of Cellulose Nanofiber-based Flexible Pressure Sensors via Electrospun and Its Performance

Cuihuan LI¹, Sheng CHEN¹^,², Jianzhen MAO², Jiahui MU¹, Ziqiang SHAO³, Feng XU¹^,*()

1. Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China
2. State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology(Shandong Academy of Sciences), Jinan 250353, China
3. Beijing Engineering Research Center of Cellulose and Its Derivatives, Beijing Institute of Technology, Beijing 100081, China

Received:2021-07-27 Online:2022-10-28 Published:2022-11-02
Contact: Feng XU E-mail:xfx315@bjfu.edu.cn

摘要/Abstract

摘要：

以醋酸纤维素(CA)为原料，利用静电纺丝技术制备醋酸纤维素纳米纤维(CANFs)，脱乙酰化后得到纤维素纳米纤维(CNFs)，再通过原位聚合吡咯构建复合导电纳米纤维(CNFs-PPy)，结合纸电极组装柔性压力传感器。通过红外光谱、X射线衍射、扫描电镜对材料进行表征，联用万能材料试验机和电化学工作站研究传感器机电性能，结果表明: 聚吡咯成功复合在纤维素纳米纤维表面，复合导电纳米纤维氮元素质量分数为24.8%；传感器在1~15 kPa压强载荷下的电流-电压曲线均保持良好的线性关系，相对电流变化率随压强增加而升高；传感器在低压强(0~0.99 kPa)范围内灵敏度高达1.77 kPa^-1, 在中压强(1.00~8.33 kPa)和高压强(8.53~15 kPa)范围内灵敏度分别为0.43和0.22 kPa^-1；传感器具有优异的信号可靠性和稳定性，循环加载3 000次器件的传感信号仍保持稳定；该传感器可以实现对手指触碰等外界压力变化的实时监测，为绿色柔性电子的发展提供了新思路。

关键词: 纤维素, 静电纺丝, 聚吡咯, 柔性压力传感器

Abstract:

Cellulose acetate nanofibers(CANFs)were prepared by electrospinning cellulose acetate(CA), followed by deacetylation to obtain cellulose nanofibers(CNFs). Subsequentially, in-situ polymerization of polypyrrole was perform to fabricate the conductive composite nanofibers(CNFs-PPy), which was combined with cellulose paper as a flexible substrate for assembling a flexible pressure sensor. The materials were characterized by FT-IR, XRD and SEM, and the mechanical and sensing performance of the devices were analyzed using a universal material testing machine and an electrochemical workstation. The results showed that polypyrrole was successfully coated on the surface of cellulose nanofibers, and the nitrogen content of composite nanofiber was 24.8%. The current-voltage curves of the sensor maintained a good linear relationship under 1-15 kPa pressure load, and the relative current change rate increased with increasing pressure. The sensitivity values of the sensor were up to 1.77 kPa^-1 in the range of low pressure(0-0.99 kPa), 0.43 kPa^-1 in the range of medium pressure(1.00-8.33 kPa) and 0.22 kPa^-1 in high pressure(8.53-15 kPa), respectively. The sensor had excellent signal reliability and stability, i.e., the sensing signal remained stable after 3 000 cycles of loading. The sensor could realize the real-time monitoring of external pressure changes such as finger touch, which provided a new insights into the development of green electronics.

Key words: cellulose, electrospinning, polypyrrole, flexible pressure sensor

中图分类号:

TQ35

李翠环, 陈胜, 毛健贞, 牟佳慧, 邵自强, 许凤. 电纺纳米纤维基柔性压力传感器的制备及性能研究[J]. 林产化学与工业, 2022, 42(5): 1-7.

Cuihuan LI, Sheng CHEN, Jianzhen MAO, Jiahui MU, Ziqiang SHAO, Feng XU. Preparation of Cellulose Nanofiber-based Flexible Pressure Sensors via Electrospun and Its Performance[J]. Chemistry and Industry of Forest Products, 2022, 42(5): 1-7.

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电纺纳米纤维基柔性压力传感器的制备及性能研究

Preparation of Cellulose Nanofiber-based Flexible Pressure Sensors via Electrospun and Its Performance

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