天然鳞片石墨球形尾料制备柔性电热膜

doi:10.16085/j.issn.1000-6613.2023-1062

化工进展 ›› 2024, Vol. 43 ›› Issue (8): 4534-4541.DOI: 10.16085/j.issn.1000-6613.2023-1062

• 材料科学与技术 • 上一篇

天然鳞片石墨球形尾料制备柔性电热膜

徐冰¹^,²(), 杨晓蓉³, 刘月华²^,⁴, 何峰⁵, 周兴⁶(), 王志², 公旭中²^,⁷()

^1.山西农业大学园艺学院，山西晋中 030801
^2.中国科学院过程工程研究所，北京 100190
^3.中国地质大学材料科学与工程学院，北京 100083
^4.太原理工大学化学工程与技术学院，山西太原 030024
^5.北京服装学院材料设计与工程学院，北京 100105
^6.河北师范大学中燃工学院，河北石家庄 050024
^7.中国科学院大学化工学院，北京 100049

收稿日期:2023-06-27 修回日期:2023-09-12 出版日期:2024-08-15 发布日期:2024-09-02
通讯作者: 周兴,公旭中
作者简介:徐冰（1999—），女，硕士研究生，从事天然石墨材料研究。E-mail：xubing328@126.com。
基金资助:
国家重点研发计划(2020YFC1909605)

Preparation of flexible electrothermal film by natural flake graphite spherical tail material

XU Bing¹^,²(), YANG Xiaorong³, LIU Yuehua²^,⁴, HE Feng⁵, ZHOU Xing⁶(), WANG Zhi², GONG Xuzhong²^,⁷()

^1.College of Horticulture, Shanxi Agricultural University, Jinzhong 030801, Shanxi, China
^2.Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
^3.School of Materials Science and Engineering, China University of Geosciences, Beijing 100083, China
^4.School of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
^5.School of Material Design and Engineering, Beijing Institute of Fashion Technology, Beijing 100105, China
^6.College of Combustion Engineering, Hebei Normal University, Shijiazhuang 050024, Hebei, China
^7.College of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Received:2023-06-27 Revised:2023-09-12 Online:2024-08-15 Published:2024-09-02
Contact: ZHOU Xing, GONG Xuzhong

摘要/Abstract

摘要：

随着球形石墨在锂离子电池负极材料的应用，天然鳞片石墨球化过程中产生了大量的球形尾料，其利用率及附加值较低。本文将球形石墨（SG8）、球形尾料与羧基化纳米纤维素按不同比例混合，制备了6种柔性电热膜。通过调控球形石墨和球形尾料添加量、电压等参数，研究电热膜的电阻、电阻率和升温速率的演变规律。研究表明，在10V电压下，球形尾料含量为15%的加热膜电阻率为8.57mΩ/mm，达到发热最高温度为59.3℃，前30s的升温速率为0.50℃/s，水洗后球形尾料含量为15%的加热膜电阻率为9.30mΩ/mm，达到发热最高温度为58.6℃，前30s的升温速率为0.46℃/s，表明球形尾料电热膜水洗后仍具备良好的柔性和发热性能，证明了利用天然石墨球形尾料可制备柔性电热膜。相比于球形石墨，球形尾料具有更好的电热性能，为天然石墨球形尾料的高质化利用提供了解决途径。

关键词: 球形尾料, 球形天然石墨, 电热膜, 柔性, 丝网印刷

Abstract:

With the application of spherical natural graphite in the anode material of lithium-ion battery, a large number of spherical tails are produced in the process of spheroidization of natural flake graphite, which has low utilization rate and added value. In this paper, six kinds of flexible electrothermal films were prepared by mixing spherical graphite (SG8), spherical tail and carbonylated nanocellulose in different proportions. The evolution law of electric resistance, resistivity and heating rate of electrothermal film was studied by adjusting the addition amount and voltage of spherical graphite and spherical tail. The research showed that at 10V, the resistivity of the heating film with 15% content of spherical tail was 8.57mΩ/mm reaching the maximum heating temperature of 59.3℃, and the heating rate was 0.50℃/s in the first 30s. After washing, the resistivity of the heating film with 15% content of spherical tail was 9.30mΩ/mm. The maximum heating temperature was 58.6℃, and the heating rate was 0.46℃/s in the first 30s, indicating that the spherical tail material still had good flexibility and heating properties after washing. It was proved that the natural graphite spherical tail material could be used to produce flexible electric heating materials. Compared with spherical graphite, spherical tail had better electric heating properties, which provided a solution for the high-quality utilization of natural graphite spherical tail.

Key words: spherical tail, spherical natural graphite, electrothermal film, flexible, screen printing

中图分类号:

徐冰, 杨晓蓉, 刘月华, 何峰, 周兴, 王志, 公旭中. 天然鳞片石墨球形尾料制备柔性电热膜[J]. 化工进展, 2024, 43(8): 4534-4541.

XU Bing, YANG Xiaorong, LIU Yuehua, HE Feng, ZHOU Xing, WANG Zhi, GONG Xuzhong. Preparation of flexible electrothermal film by natural flake graphite spherical tail material[J]. Chemical Industry and Engineering Progress, 2024, 43(8): 4534-4541.

图/表 7

图1 柔性电热膜制备流程

图2 柔性电热膜制备可视图

图3 SG8、球形尾料电热膜的结构特征

图4 石墨含量对电阻及电阻率的影响

图5 10V下SG8、球形尾料加热膜水洗后红外热成像图

图6 SG8、球形尾料加热膜水洗前后电压-发热温度图

图7 SG8、球形尾料加热膜水洗前后的温度-时间图

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天然鳞片石墨球形尾料制备柔性电热膜

Preparation of flexible electrothermal film by natural flake graphite spherical tail material

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