北京生物醫(yī)學(xué)工程

液態(tài)金屬柔性熱敷實驗研究及仿真分析

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

作者：王惠娟張恒宋穎超何志祝

單位：北京市中關(guān)村醫(yī)院健康管理中心 (北京 100070) 中國農(nóng)業(yè)大學(xué)工學(xué)院(北京 100083) 北京信息科技大學(xué) (北京 100192)

關(guān)鍵詞：生物傳熱；熱敷；液態(tài)金屬；關(guān)節(jié)炎；仿真分析

分類號：R318.01

出版年·卷·期（頁碼）：2019·38·4（339-344）

摘要：

目的利用液態(tài)金屬和導(dǎo)熱硅橡膠制備柔性電熱膜進行相關(guān)實驗, 探究其對人體肘關(guān)節(jié)皮膚加熱效果。利用計算機仿真方法對簡化模型進行數(shù)值模擬，分析其加熱過程中溫度場，為基于液態(tài)金屬導(dǎo)線的熱敷臨床應(yīng)用提供實驗依據(jù)。方法采用3D打印和模板方法制備含硅橡膠管的柔性彈性膜，并通過管內(nèi)灌注鎵銦錫合金形成液態(tài)電阻加熱絲，將制備的液態(tài)金屬柔性膜貼敷肘關(guān)節(jié)，實驗研究不同加熱功率下熱敷性能，最后利用數(shù)值模擬方法分析液態(tài)金屬熱敷過程中機體溫度變化規(guī)律。結(jié)果液態(tài)金屬柔性膜具有顯著的加熱效果，在加熱功率2.4 W并持續(xù)900 s后，肘關(guān)節(jié)表皮溫度達到37.6oC；而當加熱功率5.4 W并持續(xù)700 s后，表皮溫度高達42.8oC。結(jié)論本文提出的可拉伸柔性液態(tài)金屬電熱膜可對各種彎曲狀態(tài)下肘部實施熱敷，通過改善電熱膜內(nèi)層熱導(dǎo)率可顯著提升其傳熱性能，為人體表皮熱敷提供了新思路。

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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