Castor oil-based polyurethane ternary composites with enhanced thermal conductivity and mechanical properties by using liquid metal as second filler

被引:2
|
作者
Xu, Cui [1 ,2 ]
Du, Jun [1 ,2 ]
Jia, Xiao [1 ,2 ,3 ,4 ]
Wang, Shijun [1 ,2 ,3 ]
Liu, Bin [1 ,2 ,3 ]
Deng, Yamin [1 ,2 ]
Huai, Xiulan [1 ,2 ,3 ,4 ]
机构
[1] Chinese Acad Sci, Nanjing Inst Future Energy Syst, Inst Engn Thermophys, Nanjing, Peoples R China
[2] Chinese Acad Sci, Inst Engn Thermophys, Beijing, Peoples R China
[3] Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China
[4] Chinese Acad Sci, Nanjing Inst Future Energy Syst, Inst Engn Thermophys, Nanjing 211135, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
castor oil; electric insulation; hybrid filler; liquid metal; mechanical properties; polymer composite; thermal conductivity; POLYMERS;
D O I
10.1002/pc.28187
中图分类号
TB33 [复合材料];
学科分类号
摘要
With the miniaturization, high frequency of electronic devices, and low-carbon and sustainable development, higher requirements are put forward for thermal conductive polyurethane composites in terms of comprehensive performance and renewable raw materials. Herein, choosing bio-based polyurethane (PU) derived from castor oil as matrix, and liquid metal (LM) and aluminum hydroxide (ATH) as hybrid thermal conductive filler, castor oil-based PU composites were developed via high-speed rotation and in-situ polymerization method. The LM-ATH hybrid filler displayed a synergistic enhancement effect on the thermal conductivity of composites due to the presence of LM-bridging significantly improved the effective contact probability between ATH fillers. The thermal conductivity of 50LM-ATH/PU reached 1.69 Wm-1 K-1, which was 9.9 times and 1.4 times higher than that of pure PU and 50ATH/PU, respectively. Notably, the 50LM-ATH/PU exhibited outstanding mechanical properties including tensile strength up to 4.0 MPa and adhesion strength up to 7.9 MPa, especially elongation at break up to 120% which was improved by 200% compared with 50ATH/PU (40%). Additionally, the composite possessed excellent electric insulation, thermal stability, and inflaming retarding properties, showing great application potential in the electronic devices field.Highlights Castor oil-based PU composites with ATH-LM hybrid filer were developed. LM-ATH hybrid filler of 2:8 promoted the thermal conductivity of composites. Hybrid filler than ATH-endowed composites with better mechanical properties. The ATH-LM/PU exhibited excellent electric insulation. Preparation flowchart and performance of LM-ATH/PU composites. image
引用
收藏
页码:6184 / 6197
页数:14
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