| SiO2包覆石墨烯/双马来酰亚胺复合材料的表征及性能 |
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| 引用本文： | 陈宇飞,武耘仲,代国庆,李治国,滕成君,崔巍巍. SiO2包覆石墨烯/双马来酰亚胺复合材料的表征及性能[J]. 复合材料学报, 2020, 37(5): 1015-1023. DOI: 10.13801/j.cnki.fhclxb.20190911.001 |
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| 作者姓名： | 陈宇飞 武耘仲 代国庆 李治国 滕成君 崔巍巍 |
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| 作者单位： | 1.哈尔滨理工大学 工程电介质及应用技术教育部重点实验室，哈尔滨 150080 |
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| 基金项目： | 国家自然科学基金(51177030)，哈尔滨创新人才专项(2015RAXXJ029) |
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| 摘 要： | 采用硅烷偶联剂乙烯基三甲氧基硅烷(VTMO)改性石墨烯(GE)，利用溶胶-凝胶法在GE表面包覆SiO2微球，得到SiO2包覆改性石墨烯(SiO2@(VTMO-GE))，以二烯丙基双酚A(BBA)和双酚A双烯丙基醚(BBE)为活性稀释剂，4,4′-二氨基二苯甲烷型双马树脂(MBMI)为单体，制备MBMI-BBA-BBE(MBAE)树脂基体；同时，以SiO2@(VTMO-GE)为增强体，采用原位聚合法制备SiO2@(VTMO-GE)/MBAE复合材料。对VTMO-GE及包覆效果进行表征和分析，研究SiO2@(VTMO-GE)增强体与SiO2@(VTMO-GE)/MBAE复合材料性能之间的关系。结果表明:VTMO成功改性GE，且SiO2微球均匀包覆在VTMO-GE表面；SiO2@(VTMO-GE)提高了SiO2@(VTMO-GE)/MBAE复合材料性能。当SiO2@(VTMO-GE)掺杂量为2.0wt%时，SiO2@(VTMO-GE)/MBAE复合材料的冲击强度和弯曲强度达到最大，分别为23.0 kJ/m2和157.4 MPa，较聚合物基体分别提高了150%和58%；在频率为102~104 Hz范围内，介电常数较为平稳，约为70.0；介电损耗约为3.7×10?3，耐热性能随SiO2@(VTMO-GE)掺杂量的增加有所提高。SiO2@(VTMO-GE)/MBAE复合材料具有优异的综合性能，为其进一步应用奠定了基础。
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| 关 键 词： | 双马来酰亚胺 石墨烯 SiO2 力学性能 介电性能 |
| 收稿时间： | 2019-05-28 |
Characterization and properties of SiO2-coated graphene/bismaleimide composites |
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| Affiliation: | 1.Key Laboratory of Engineering Dielectrics and its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, China2.College of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040， China3.Harbin Xiangfang District Center for Disease Control and Prevention, Harbin 150030, China |
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| Abstract: | The silane coupling agent vinyl trimethoxysilane (VTMO) was used to modify graphene (GE), and SiO2 microspheres were coated on the surface of graphene by sol-gel method to obtain SiO2-coated modified graphene (SiO2@(VTMO-GE)). The 4,4′-diaminodiphenyl methane bismaleimide-diallyl bisphenol A-bisphenol A bisallyl ether (BBA-BBE-MBMI, MBAE) matrix was synthesized from BBA, BBE and MBMI, in which BBA and BBE were used as reactive diluents and MBMI was used as the monomer. The MBAE modified by SiO2-coated graphene (SiO2@(VTMO-GE)/MBAE) composites were prepared by in-situ polymerization with SiO2@(VTMO-GE) as the reinforcement. The effect of SiO2@(VTMO-GE) on the properties of the SiO2@(VTMO-GE)/MBAE composite was studied by characterizing and analyzing the VTMO-GE and the coating effect. The results show that GE is successfully modified by VTMO, and SiO2 microspheres are uniformly coated on the surface of VTMO-GE. The SiO2@(VTMO-GE) component improves global properties of the SiO2@(VTMO-GE)/MBAE composite. The impact strength and bending strength of the SiO2@(VTMO-GE)/MBAE composite reach the maximum of 23.0 kJ/m2 and 157.4 MPa, respectively, which are 150% and 58% higher than that of the MBAE, when the content of SiO2@(VTMO-GE) is 2.0wt%. The dielectric constant and the dielectric loss are about 70.0 and 3.7×10–3 in the frequency range of 102–104 Hz, while the heat resistance enhances with the increase of SiO2@(VTMO-GE) amount. The SiO2@(VTMO-GE)/MBAE composite exhibits excellent global properties and lays the foundation for further application. |
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