高级检索

    吴唯, 刘建华, 刘江, 邹志强, 张雪薇. h-BN与Al2O3复配填充共聚甲醛导热材料的制备及性能[J]. 华东理工大学学报(自然科学版), 2019, 45(3): 419-423. DOI: 10.14135/j.cnki.1006-3080.20180408001
    引用本文: 吴唯, 刘建华, 刘江, 邹志强, 张雪薇. h-BN与Al2O3复配填充共聚甲醛导热材料的制备及性能[J]. 华东理工大学学报(自然科学版), 2019, 45(3): 419-423. DOI: 10.14135/j.cnki.1006-3080.20180408001
    WU Wei, LIU Jianhua, LIU Jiang, ZOU Zhiqiang, ZHANG Xuewei. Preparation and Properties of Thermally Conductive Co-POM Materials Filled with Composite of h-BN and Al2O3[J]. Journal of East China University of Science and Technology, 2019, 45(3): 419-423. DOI: 10.14135/j.cnki.1006-3080.20180408001
    Citation: WU Wei, LIU Jianhua, LIU Jiang, ZOU Zhiqiang, ZHANG Xuewei. Preparation and Properties of Thermally Conductive Co-POM Materials Filled with Composite of h-BN and Al2O3[J]. Journal of East China University of Science and Technology, 2019, 45(3): 419-423. DOI: 10.14135/j.cnki.1006-3080.20180408001

    h-BN与Al2O3复配填充共聚甲醛导热材料的制备及性能

    Preparation and Properties of Thermally Conductive Co-POM Materials Filled with Composite of h-BN and Al2O3

    • 摘要: 选用六方氮化硼(h-BN)和α球形Al2O3为导热填料,分别以单一填料和复配填料制备填充共聚甲醛(Co-POM)导热材料,研究了填料含量、复配比例等因素对Co-POM材料的导热系数、拉伸性能和微观形态的影响。结果表明:两种填料都能提高Co-POM材料的导热系数,填充量越大,导热系数越高,但h-BN比Al2O3导热改性效果更好。当h-BN和Al2O3复配填充质量比为1∶1(填充总量的质量分数为20%)时,Co-POM导热系数超过Al2O3质量分数为30%的单一填料的导热系数,并接近h-BN质量分数为20%的单一填料的导热系数,而复配填充Co-POM的力学性能变化不大。因此,复配填料能达到降低填充量以及降低填料成本的目的。

       

      Abstract: Copolyoxymethylene(Co-POM) material has ordered molecular structure without side-chain, and is called metallic plastic because of its good dimensional stability, mechanical properties, processability and insulation. Co-POM material is widely applied in many fields, such as electronics and electrical appliances, plumbing and irrigation equipments, automobiles. However, the application of Co-POM is limited in the fields of microelectronics and LED lighting due to its low thermal conductivity. Therefore, it is crucial to prepare the Co-POM material with high thermal conductivity and excellent mechanical properties. To this regard, we blend some thermally conductive fillers with Co-POM resin in order to improve its thermal conductivity. Hexagonal boron nitride (h-BN) and α spherical alumina (Al2O3) can be as thermally conductive filler, due to their higher thermal conductivity than Co-POM. Co-POM thermally conductive materials were prepared with single or composite fillers. The effects of filler content and composition ratio on the thermal conductivity, tensile property and micro-morphology of thermally conductive Co-POM materials were investigated in this work. The results showed that the thermal conductivity Co-POM materials could be improved by filling with h-BN or Al2O3, the more the content of filler was used, the higher thermal conductivity of filled materials was obtained. Notably, the thermally modified effect of h-BN was better than Al2O3. Furthermore, in case the mass ratio of h-BN and Al2O3 was at 1:1, the resulting thermally conductivity of Co-POM material (the mass fraction of filler was 20%, the same below) was higher than the Co-POM material prepared with 30% (mass fraction) Al2O3, and approaching to the thermal conductivity of Co-POM prepared with 20% (mass fraction) h-BN. Additionally, the tensile strength of Co-POM material filled with composite showed slight changes. Therefore, the use of composite fillers can reduce the added content of filler, and thereby decrease the cost of materials preparation.

       

    /

    返回文章
    返回