环氧树脂复合材料热稳定性及绝缘强度的研究.pdf

第43卷第4期
塑料工业
2015年4月
CHINA PLASTICS INDUSTRY
87
纳米A203/环氧树脂复合材料热稳定性及
绝绦强度的研究
徐丹丹,朱婕,刘子仪,唐榕,刘剑
(西南科技大学材料科学与工程学院,四川绵阳621010
摘要:采用超声清洗器对纳米三氧化铝(A203)用偶联剂(KH560)进行表面改性。然后利用超声细胞粉碎机
和机械搅拌将该纳米Al203与双酚A环氧树脂、胺类固化剂混合搅拌,随后将混合物在烘箱中进行固化反应。通过傅
里叶变换红外光谱仪、扫描电子显微、综合热分析仪和动态力学热分析仪等手段对体系的相关性能进行表征。结果表
明,与纯环氧树脂相比,纳米A2O3/环氧树脂复合材料的相关性能更加优异。断面形貌显示出体系的相容性好。随着
纳米Al203含量的增加,复合材料具有较好的热力学性能。与纯环氧树脂相比、当纳米A203质量分数为10%时,环
氧树脂复合材料在失重率5%和10%时的温度分别提高29.7℃和23.3℃,复合材料的储能模量和介电损耗角正切分
别提高40%和降低18.6%;纳米A2O2质量分数5%时,电气强度提高了43%。
关键词:环氧树脂;超声细胞粉碎机;热稳定性;储能模量;介电损耗角正切;电气强度
DOI:10.3969/.issn.1005~5770.2015.04.020
中图分类号:TQ323.5
文献标识码
文章编号:1005-5770(2015)04-0087-05
Thermal Stability and Insulation Strength of Nano-al2 O /Epoxy Resin Composites
XU Dan-dan, ZHU Jie, LIU Zi-yi, TANG Rong, LIU Jian
School of Materials Science and Engineering, Southwest University of Science and Technoogy, Mianyang 621010, China)
Abstract: The surfaces of nano-al, 0; particles were modified with coupling agent KH560 using
ultrasonic cleaner. The resultant modified nano-al O, were blended with bishenol A epoxy resin and amine
hardening agent in the ultrasonic cell crusher. And then the well blended mixture was cured in an ovent. The
properties of the system were characterized by Fourier transform infrared spectrometer, scanning electron
microscope, thermogravimetry differential scanning calorimetry, dynamic mechanical analysis and universal
testing machine. And the value of results showed the nano-al O /epoxy composite had more excellent
performances than pure epoxy resin. Section morphology showed that the blend was compatible. The
thermodynamics properties increased with increase of nano-alumina content. Compared with pure epoxy resin
the temperatures of weight loss at 5% and 10% of the epoxy composites with 10% nano-composites were 29. 7
C and 23.3 C respectively. And the storage modulus of epoxy composite with 10% nano-composites was
35%0 higher than that of pure epoxy resin, while the value of loss angle tangent was 15%o lower. The
electrical strength was 23. 1% higher than that of pure epoxy resin when the nano-a120 content reached 5
Keywords: Epoxy Resin; Ultrasonic Cell Crusher; Thermal Stability; Storage Modulus; Loss Angle
Tangent; Electrical Strength
环氧树脂本身的强度、热力学性能和模量相对其究。陈江华等?研究了偶联剂改性纳米A2O3/环氧
他材料都较低,使用纳米三氧化二铝(Al203)可以树脂复合材料,偶联剂的加入使无机粒子与基体界面
将纳米Al20,的耐热性好、强度高等特殊性质带进改强度提高。周红军等研究了活性纳米Al203/环氧
进的材料中。目前国内外科研工作者在环氧树脂树脂的复合材料,当活性纳米Al203加入2%时可以
复合材料的热力学性能及电学性能方面有了各种研使得热力学温度比纯环氧树脂提高17.5℃。
*联系人jian@swust.edu.cn
作者简介:徐丹丹,女,1988年出生,在读硕士研究生,从事纳米三氧化铝环氧树脂复合材料的制备及绝缘性的研究。