摘要
电子设备的快速散热为目前需要解决的技术问题。为了解决该问题,采用熔融共混法制备了聚丙烯(PP)/氧化铝(Al_(2)O_(3))/石墨烯(GNP)三元复合材料,研究了改性氧化铝(m-Al_(2)O_(3))和GNP含量对其导热性能和拉伸性能的影响。结果表明,Al_(2)O_(3)改性后,能改善填料与基体的界面结合及GNP的团聚现象,在PP/m-Al_(2)O_(3)复合材料中加入少量GNP,复合材料的热导率和拉伸性能均得到明显提升。当加入GNP的含量为7%时,PP/m-Al_(2)O_(3)/GNP复合材料的热导率达到最大,其值为2.65 W/(m·K),与纯PP和PP/Al_(2)O_(3)复合材料相比,分别提升了1225%、244%。采用红外热成像仪对样品的导热性能进行分析发现,在相同加热条件下,热导率较高的样品表面迅速升温。同时,复合材料的拉伸强度和弹性模量分别达到25.2 MPa和9.5 GPa。
Rapid heat dissipation of electronic devices had become a technical problem that needs to be solved urgently.To solve the problem,Polypropylene(PP)/alumina(Al_(2)O_(3))/graphene(GNP)ternary composite were prepared by melt blending method,and the effects of modified alumina(m-Al_(2)O_(3))and GNP content on their thermal conductivity and tensile properties were studied.The results indicate that Al_(2)O_(3)modification could improve the interfacial binding between the filler and the matrix and promote the dispersion of GNP.Adding a small amount of GNP to PP/m-Al_(2)O_(3)composite significantly improved the thermal conductivity and tensile properties of the composite.When the content of GNP added was 7%,the thermal conductivity of the corresponding PP/m-Al_(2)O_(3)/GNP composite reached the highest value,which was 2.65 W/(m·K),compared with pure PP and PP/Al_(2)O_(3)composite,it was increased by 1225%and 244%,respectively.The thermal conductivity of the sample was analyzed by infrared thermal imager,and it was found that the surface of the sample with high thermal conductivity could heat up rapidly under the same heating conditions.At the same time,the tensile strength and Young's modulus of the composite materials reached 25.2 MPa and 9.5 GPa,respectively.
作者
王锴
曾伟强
吴方娟
黄海涛
范新凤
方辉
WANG Kai;ZENG Weiqiang;WU Fangjuan;HUANG Haitao;FAN Xinfeng;FANG Hui(College of Materials Science and Engineering,Fujian University of Technology,Fuzhou,Fujian 350118,China)
出处
《塑料》
北大核心
2025年第3期28-32,共5页
Plastics
基金
中央引导地方科技发展专项(2021L3015)
大学生创新创业训练计划(S202310388054)。
关键词
复合材料
聚丙烯
热导率
氧化铝
石墨烯
熔融共混
composite
polypropylene
thermal conductivity
alumina
graphene
melt blending
