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新型聚乙烯醇/聚乙二醇水凝胶热沉性能研究

殷健宝 邢玉明 郝兆龙 王仕淞 王子贤 侯煦

殷健宝,邢玉明,郝兆龙,等. 新型聚乙烯醇/聚乙二醇水凝胶热沉性能研究[J]. 北京航空航天大学学报,2023,49(1):187-194 doi: 10.13700/j.bh.1001-5965.2021.0181
引用本文: 殷健宝,邢玉明,郝兆龙,等. 新型聚乙烯醇/聚乙二醇水凝胶热沉性能研究[J]. 北京航空航天大学学报,2023,49(1):187-194 doi: 10.13700/j.bh.1001-5965.2021.0181
YIN J B,XING Y M,HAO Z L,et al. Performance of a novel polyvinyl alcohol/polyethylene glycol hydrogel for heat sink[J]. Journal of Beijing University of Aeronautics and Astronautics,2023,49(1):187-194 (in Chinese) doi: 10.13700/j.bh.1001-5965.2021.0181
Citation: YIN J B,XING Y M,HAO Z L,et al. Performance of a novel polyvinyl alcohol/polyethylene glycol hydrogel for heat sink[J]. Journal of Beijing University of Aeronautics and Astronautics,2023,49(1):187-194 (in Chinese) doi: 10.13700/j.bh.1001-5965.2021.0181

新型聚乙烯醇/聚乙二醇水凝胶热沉性能研究

doi: 10.13700/j.bh.1001-5965.2021.0181
详细信息
    通讯作者:

    E-mail:haozhaolong@buaa.edu.cn

  • 中图分类号: TK124

Performance of a novel polyvinyl alcohol/polyethylene glycol hydrogel for heat sink

More Information
  • 摘要:

    为研究水凝胶作为热管理技术的可行性和潜力,采用物理循环冷冻法制备一种力学和经济性良好的新型聚乙烯醇(PVA)/聚乙二醇(PEG)复合水凝胶热沉,热沉尺寸为60 mm×60 mm×2 mm,通过表面的水分蒸发来实现自冷。在2712 W/m2热流下进行散热性能探究实验,得到了升温特性、蒸发对流强度变化关系和溶胀变化规律。发现加入2.5%质量分数的PEG减小了随循环冷冻次数增加造成的制备变形,减小了75.53%的含水量衰减,同时使芯片表面控温下降7.53%。根据实验结果计算得到了蒸发换热系数,并研究了热流、厚度和湿度对蒸发散热的影响。通过对水凝胶不同温度和使用情况(4 h连续使用及120 d常温储存)下溶胀率的测定,证明水凝胶具备一定的短时使用可靠性,但对温度的敏感响应并不显著。

     

  • 图 1  水凝胶热沉散热能力测试装置示意图

    Figure 1.  Schematic diagram of test device for heat dissipation capacity of hydrogel heat sink

    图 2  水凝胶热量平衡示意图

    Figure 2.  Schematic diagram of hydrogel heat balance

    图 3  1次循环冷冻后的实验样品及2712 W/m2热流下芯片表面的升温曲线

    Figure 3.  Physical image of experimental sample after a cycle of freezing, and heating curves of chip surface with heat flow of 2712 W/m2

    图 4  实际芯片升温曲线的测定

    Figure 4.  Measurement of actual chip heating curve

    图 5  4次循环冷冻的水凝胶实物图和对芯片表面的控温效果对比

    Figure 5.  Physical picture of frozen hydrogel with four cycles, and temperature control effect of these cycles on chip surface

    图 6  高温自然对流散热的实验样品图与对应升温曲线

    Figure 6.  Experimental sample diagram and corresponding heating curves of high temperature natural convection heat dissipation

    图 7  不同湿度条件下的水凝胶升温曲线

    Figure 7.  Hydrogel heating curves under different humidity conditions

    图 8  水凝胶溶胀率随循环次数和温度的变化曲线

    Figure 8.  Variation curves of hydrogel swelling ratio with cycle numbers and temperature

    图 9  不同条件下水凝胶的连续升温曲线

    Figure 9.  Continuous heating curves of hydrogel under different conditions

    表  1  水凝胶制备材料

    Table  1.   Materials for hydrogel preparation

    水凝胶PVA/gPEG/g去离子水/mL
    P10/010090
    P10/2.5102.587.5
    P5/2.552.592.5
    下载: 导出CSV

    表  2  不同参数下PVA/PEG复合水凝胶的蒸发换热系数及水凝胶的散热贡献率

    Table  2.   Evaporation heat transfer coefficient of PVA/PEG composite hydrogel with different parameters, and contribution of hydrogel to heat dissipation

    热流密度/
    ( W·m−2)
    水凝胶
    厚度/mm
    蒸发换热
    系数he
    /(W·(m2·K)−1)
    $\dfrac{q_{{\rm{sens}}}+q_{{\rm{evap}}}}{q}$/%
    760321.6052.39
    1280325.5750.85
    2000324.9048.82
    2712330.2158.32
    3640342.2965.28
    2712243.0162.30
    2712831.0663.04
    下载: 导出CSV
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  • 收稿日期:  2021-04-09
  • 录用日期:  2021-06-04
  • 刊出日期:  2021-07-01

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