北京生物医学工程

液态金属柔性热敷实验研究及仿真分析

Experimental study and simulation analysis on flexible hot compress of liquid metal

作者：王惠娟张恒宋颖超何志祝

单位：北京市中关村医院健康管理中心 (北京 100070) 中国农业大学工学院(北京 100083) 北京信息科技大学 (北京 100192)

关键词：生物传热；热敷；液态金属；关节炎；仿真分析

分类号：R318.01

出版年·卷·期（页码）：2019·38·4（339-344）

摘要：

目的利用液态金属和导热硅橡胶制备柔性电热膜进行相关实验, 探究其对人体肘关节皮肤加热效果。利用计算机仿真方法对简化模型进行数值模拟，分析其加热过程中温度场，为基于液态金属导线的热敷临床应用提供实验依据。方法采用3D打印和模板方法制备含硅橡胶管的柔性弹性膜，并通过管内灌注镓铟锡合金形成液态电阻加热丝，将制备的液态金属柔性膜贴敷肘关节，实验研究不同加热功率下热敷性能，最后利用数值模拟方法分析液态金属热敷过程中机体温度变化规律。结果液态金属柔性膜具有显著的加热效果，在加热功率2.4 W并持续900 s后，肘关节表皮温度达到37.6oC；而当加热功率5.4 W并持续700 s后，表皮温度高达42.8oC。结论本文提出的可拉伸柔性液态金属电热膜可对各种弯曲状态下肘部实施热敷，通过改善电热膜内层热导率可显著提升其传热性能，为人体表皮热敷提供了新思路。

Objective To develop a novel flexible heating film based on liquid metal and silicon rubber for compress device. A device model was made to test the heating performance on the human elbow, and a simplified simulation model was developed to investigate the temperature distribution of the body during hot-compress process. The work provided the experimental basis for clinical application in hot compress of liquid metal. Methods The 3D printing and template methods were used to prepare the heating film embedded with silicon tube, which was then filled with the liquid metal of GaInSn. The heating performance on the human elbow was experimentally studied, which was also investigated in detail through the simulation method. Results The flexible liquid metal-based film had significant heating performance, for power of 2.4 W and heating time of 900 seconds, the skin temperature located on elbow reached to 37.6oC, while the temperature could rise to 42.8oC for the power of 5.4 W and heating time of 700 seconds. Conclusions The developed stretchable liquid metal heating film could be used to hot compress on elbow with different angles of bend. In addition, the thermal conductivity of inner layer of the film was regulatable to remarkably improve its heat conduction, which opened a new way for hot compress.

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