丙烯腈-丁二烯-苯乙烯/热塑性聚氨酯/氮化硅/石墨导热复合材料的制备及性能  

Preparation and performance of thermally conductive composite materials based on ABS/TPU/Si_(3)N_(4)/FG

作　　者：刘雪婷 夏英 陈浩哲 金志翔 于洪健 王事捷 LIU Xueting;XIA Ying;CHEN Haozhe;JIN Zhixiang;YU Hongjian;WANG Shijie(School of Textile and Material Engineering,Dalian Polytechnic University,Dalian 116034,China)

机构地区：[1]大连工业大学纺织与材料工程学院,辽宁大连116034

出　　处：《大连工业大学学报》2025年第2期86-91,共6页Journal of Dalian Polytechnic University

基　　金：辽宁省教育厅A类项目(LJKZ0513);兴辽英才计划项目(XLYC1906017)。

摘　　要：以丙烯腈-丁二烯-苯乙烯(ABS)、热塑性聚氨酯(TPU)为基体,氮化硅(Si_(3)N_(4))和石墨(FG)为导热填料,采用熔融共混、模压成型技术制备了ABS/TPU/Si_(3)N_(4)(ATS)与ABS/TPU/Si_(3)N_(4)/FG(ATSG)填充型导热复合材料。分析了Si_(3)N_(4)和FG导热填料对复合材料导热性能、力学性能、微观形貌、热稳定性、流变性能的影响。结果表明,随着Si_(3)N_(4)和FG添加量的增加,复合材料导热率增加,热稳定性显著提高。当Si_(3)N_(4)用量为30%、FG用量为5g时,复合材料导热系数最高,达到0.53 W/(m·K),与ABS/TPU相比,导热系数提高了221.56%。Si_(3)N_(4)和FG在ABS/TPU基体中堆叠并接触,形成致密互联的导热网络,此时的复合材料在低频振荡区域有一个明显的储能模量与损耗模量变化不大的平台区,说明此用量下可形成流变渗透导热网络,提高了复合材料的导热性能。ABS/TPU/Si_(3)N_(4)(ATS)and ABS/TPU/Si_(3)N_(4)/FG(ATSG)filled thermal conductive composite materials were prepared by melt blending and compression molding techniques,using acrylonitrile butadiene styrene(ABS)and thermoplastic polyurethane(TPU)as matrices and silicon nitride(Si_(3)N_(4))and graphite(FG)as thermal conductive fillers.The effects of Si_(3)N_(4)and FG thermal conductive fillers on the thermal conductivity,mechanical properties,microstructure,thermal stability and rheological properties of composite materials were analyzed.The results indicated that with the increase of Si_(3)N_(4)and FG contents,the thermal conductivity of the composite material increases and the thermal stability is significantly improved.When the dosages of Si_(3)N_(4)and FG are 30%and 5 g,respectively,the thermal conductivity of the composite material reaches the highest of 0.53 W/(m·K),increased by 221.56%compared with ABS/TPU.Si_(3)N_(4)and FG are stacked and in contact in the ABS/TPU matrix,forming a dense interconnected thermal conductivity network.The composite material has a clear plateau area with little change in storage modulus and loss modulus in the low-frequency oscillation region,indicating that a rheological permeation thermal conductivity network formed with this dosage,which improves the thermal conductivity of the composite material.

关 键 词：氮化硅 石墨 丙烯腈-丁二烯-苯乙烯 热塑性聚氨酯 导热率 导热网络 

分 类 号：TB332[一般工业技术—材料科学与工程]