全文下载：2014020182
张娜， 杨刚， 马连湘*， 何燕， 唐元政
（青岛科技大学 机电工程学院， 山东 青岛 266042）
摘要： 选用三元乙丙橡胶（EPDM）为基胶，氮化铝(AlN)为导热填料，通过酚醛树脂(PF)对氮化铝进行表面改性处理，增加其在橡胶基体中的分散性。利用接触角和TGA测试表征改性效果。将改性前后的氮化铝分别填充到三元乙丙橡胶中，研究酚醛树脂改性氮化铝对复合材料的导热性能及力学性能的影响规律。结果表明：改性后氮化铝表面自由能均减小，氮化铝表面包覆了有机基团，减弱了其在橡胶基体中的团聚作用。热分解曲线可以说明，3种改性配比（1#~3#，m(PF)∶m(AlN)=1∶5，1∶4，1∶3）氮化铝的酚醛树脂包覆量为1#＜2#＜3#，填充改性后氮化铝的复合材料导热性能均有不同程度的提高，而力学性能均有所降低。综合考虑，酚醛树脂改性氮化铝的最佳质量配比为m(PF)∶m(AlN)=1∶4。
关键词： 氮化铝； 酚醛树脂； 三元乙丙橡胶； 复合材料； 热导率
中图分类号： TQ 050.4+3文献标志码： A
Thermal Conductivity and Mechanical Properties of EPDM Rubber Filled with ModifiedAlN
ZHANG Na, YANG Gang, MA Lianxiang, HE Yan, TANG Yuanzheng
（College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China）
Abstract: AlN were used as thermal conductive fillers of EPDM rubber. And in order to increase the dispersion of AlN in the matrix, the surface treatment of AlN were coated by phenol formaldehyde resin (PF). The contact angle and TGA of AlN and modified AlN were studied. The thermal conductivities and mechanical properties of composites material were also investigated. The results show that the surface free energy of modified AlN is lower than unmodified, the surface of modified AlN are coated by organic groups, so the modified AlN are easier dispersion in the matrix. Through the TGA analysis, it can be indicated that the surface coating thickness is 1#＜2#＜3#. With the increase of the filler, the thermal conductivities of composites are all on the rise, while the mechanical properties decreased in different degree. Synthetic analysis indicates that, the optimal ratio of AlN and PF is m(PF)∶m(AlN)=1∶4.
Key words: AlN; phenol formaldehyde resin; EPDM rubber; composite materials； thermal conductivity
收稿日期： 20130107
基金项目： 国家自然科学基金资助项目(51076070).
作者简介： 张娜（1987—）,女，硕士研究生.*通信联系人.
