高导热氮化硼/ 聚碳酸酯复合材料的制备与性能研究
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科技部国家重点研发计划(2017YFB0406200);中国科学院前沿科学重点研究项目(QYZDY-SSW-JSC010);广东省重点实验室 (2014B030301014);深圳市基础研究项目(JCYJ20150831154213681)

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Preparation and Properties of High Thermal Conductive Boron Nitride/Polycarbonate Nitride Composites
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    摘要:

    以聚碳酸树脂(PC)为基体,通过注塑成型制备了氮化硼/聚碳酸酯(BN/PC)复合材料,并重点 研究了复合材料中氮化硼粒径、含量、分散状态和材料加工成型工艺对复合体系导热性能和力学性能 的影响。实验结果表明,氮化硼粒子粒径在 1~10 μm 时,复合材料的导热性能随粒径的增大而增大, 而拉伸强度随之下降。随着氮化硼填充含量的增加,复合材料的导热性能升高,力学性能呈现先增后 降的趋势。当氮化硼用量为 5 wt% 时,复合材料的拉伸强度达到最佳(65.14 MPa)。在相同氮化硼填 充含量时,溶液混合法比其他固相混合方法更有利于制备具有优异导热性能的 BN/PC 复合材料。采用 两步混合法,即 BN/PC 溶液混合产物与聚碳酸树脂颗粒二次混合制备的复合材料的热力学性能,优于 BN/PC 一次混合法制备复合材料的热力学性能。

    Abstract:

    A thermally conductive composite consisting of polycarbonate (PC) resin and boron nitride (BN) was prepared by injection molding method. The effects of size and content of BN particles, preparation process of the composite, and the dispersion state of BN on the thermal and mechanical properties of the composites were investigated. The result showed that thermal conductivity of BN/PC composite prepared by the proposed was much higher than that of BN/PC composite prepared by either melting method or powder method. In addition, the thermal conductivity of the composites could be improved by increasing the BN particle size, but the tensile strength would be decreased. With the increasing content of BN particles, the thermal conductivity could be increased accordingly. Meanwhile, the tensile strength first increased and then decreased. When the content of BN was increased to 5 wt%, the tensile strength can reach the maximum value of 65.14 MPa. The thermal properties of the composites prepared by BN/PC solution and PC beads were better than those of BN/PC composites.

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引文格式
孙娜,曾小亮,陈鹏,等.高导热氮化硼/ 聚碳酸酯复合材料的制备与性能研究 [J].集成技术,2017,6(6):15-23

Citing format
SUN Na, ZENG Xiaoliang, CHEN Peng, et al. Preparation and Properties of High Thermal Conductive Boron Nitride/Polycarbonate Nitride Composites[J]. Journal of Integration Technology,2017,6(6):15-23

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  • 收稿日期:2017-08-08
  • 最后修改日期:2017-10-17
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  • 在线发布日期: 2017-11-21
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