中孔炭微球/酚醛树脂复合材料的力学及介电性能

周建国; 朱小磊; 张利; 乔文明; 龙东辉; 凌立成

中孔炭微球/酚醛树脂复合材料的力学及介电性能

1.
华东理工大学化学工程联合国家重点实验室, 上海 200237;
2.
中国化工集团公司, 北京 100080

基金项目: 国家自然科学基金(21576090,51302083,51172071);中央高校基本科研业务费专项资金;上海市青年科技启明星计划资助(15QA1401300).

详细信息

作者简介:
周建国,博士研究生.E-mail:zhoujg10@163.com

通讯作者:
龙东辉,副教授.E-mail:longdh@mail.ecust.edu.cn

中图分类号: TB332
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- 文章访问数: 749
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- 被引次数: 0
出版历程
- 收稿日期: 2016-05-03
- 录用日期: 2016-06-28
- 修回日期: 2016-06-01
- 刊出日期: 2016-06-28

Mechanical and dielectric properties of mesoporous carbon microsphere/phenolic resin composites

1.
State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
2.
China National Chemical Corporation, Beijing 100080, China

Funds: National Science Foundation of China (21576090, 51302083, 51172071);Fundamental Research Funds for the Central Universities and Shanghai Rising Star Program (15QA1401300).

摘要

摘要: 以间苯二酚-甲醛为前驱体、喷雾干燥法可规模制备出中孔炭微球,进一步采用聚乙烯醇对其进行表面致密化处理,再与酚醛树脂热压成型得到中孔炭微球/酚醛树脂复合材料,系统研究了复合材料的力学性能及介电性能。结果表明,所制炭微球具有较窄的粒径分布(1~10μm)、发达的中孔孔隙(孔容>3.0 cm³/g)。经表面包覆后,中孔炭微球表面致密,形成类"蛋壳"结构。当用于复合材料填料(0~10%)时,能有效的降低复合材料的密度(1.36 g/cm³至1.12 g/cm³),并显著提升复合材料的力学性能(压缩强度由106 MPa增加至168 MPa);在10²~10⁷ Hz频率下,复合材料的介电常数随着炭微球添加量的增加逐渐提高,由4.0~3.6提高至10.4~9.1。结果表明,中孔炭微球可作为新一类多功能填料,在降低复合材料密度的同时增加力学性能,并在较宽频率下具备高的介电性能,具有优异的低密度吸波基体材料的应用潜力。
- 中孔炭微球 /
- 复合材料 /
- 力学性能 /
- 介电性能
Abstract: Mesoporous carbon microspheres (MCMs) were prepared by a scalable spray-drying method using resorcinol-formaldehyde resin as the carbon precursor. The MCMs were used as low density fillers of phenolic resin matrix composites for microwave absorption. They were coated with polyvinyl alcohol (PVA) before being added to the phenolic resin and the composites were prepared by the hot-pressing method. Results showed that the MCMs had a narrow particle size distribution of 1-10 μm and developed mesopores with a total pore volume of 3.0 cm³/g. The PVA coating densified the surface of the MCMs to form a core-shell structure while retaining the mesopores. The density of the composites decreased from 1.36 to 1.12 g/cm³ by increasingthe MCM content from 0 to 10 wt%. The corresponding dielectric constant in the frequency range of 102-107 Hzincreased from 4.0-3.6 to 10.4-9.1. The compressive strength exhibited a maximum of 168 MPa with a MCM content of 5 wt%.The low density, high mechanical strength and high dielectric constant of the composites suggests that the MCMs are ideal fillers for phenolic resin-based microwave absorption materials.
- Mesoporous carbon microspheres /
- Composites /
- Mechanical properties /
- Dielectric properties

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