Preparation and Microwave Absorption Properties of CB/PBO Composite

doi:10.3724/SP.J.1077.2013.13041

Abstract

Abstract: TA salt was prepared by the solution of 4,6-diaminon1,3-benzenediol and terephthalic acid, and then copolymerized in PPA to get poly(p-phenylene benzobisoxazole) (PBO) with good thermal resistance. Using as-prepared PBO as matrix, carbon black (CB) as absorber, CB/PBO composites were fabricated by hot pressing. Influences of CB weight concentration on complex permitivity and on thermal properties of CB/PBO composites were investigated. The results show that the real and imaginary parts of permittivity are increased with the increase of carbon black concentration. The reflectivity bandwidth and reflection loss lower than -10 dB are about 2.4 GHz and -32 dB, respectively, when CB weight concentration is 5% and the thickness of composite is 2 mm. The mass loss of PBO and CB/PBO composite are 11.84% and 21.99%, respectively, when kept at 450℃ for 5 h.

Key words: PBO, thermal property, complex permittivity, composite, carbon black

CLC Number:

TB34

WANG Li, LUO Fa, LIU Li, ZHOU Wan-Cheng, ZHU Dong-Mei. Preparation and Microwave Absorption Properties of CB/PBO Composite[J]. Journal of Inorganic Materials, 2013, 28(12): 1333-1337.

References

[1] Luo Fa, Zhou Wancheng, Jiao Huan, et al. Current study of high temperature radar absorbing materials. Aerospace Materials & Technology, 2002(1): 8-11.

[2] Costa L C, Achour M E, Graca M P F, et al. Dielectric properties of the ethylene butylacrylate/carbon black nanocompsites. Journal of Non-Crystalline Solids, 2010, 356(4/5): 270-274.

[3] Oh Jung-Hoon, Oh Kyung-Sub, Kim Chun-Gon, et al. Design of radar absorbing structures using glass/epoxy composite containing carbon black in X-band frequency ranges. Composites:Part B, 2004, 35(1): 49-56.

[4] Wang Shuzhong. Aromatic high-performance fibers. China Systhetic Ffiber Industry, 1998, 21(6): 24928.

[5] Wu Pingping, Feng Dongdong, Han Zhewen. Study of super fiber-PBO. China Science and Technology Achivements, 2004(16): 20-23.

[6] Song B, Meng L H, Huang Y D. Influence of plasma treatment time on plasma induced vapor phase grafting modification of PBO fiber surface. Applied Surface Science, 2012, 258(14): 5505-5510.

[7] Wang J, Liang G, Zhao W, et al. Enzymatic surface modification of PBO fibres. Surface & Coatings Technology, 2007, 201(8): 4800-4804.

[8] Park J, Kim D, Kim S. Improvement of interfacial adhesion and nondestructive damage evaluation for plasma-treated PBO and Kevlar fibers/epoxy composites using micromechanical tecniques and surface wettability. Journal of Colloid and Interface Science, 2003, 264(27): 431-445.

[9] Zhang Chunhua, Huang Yudong, Wang Shiwei. Modification mechanism of PBO fiber surface by γ-ray irradiation. Materials Science & Technology, 2007, 15(3): 305-310.

[10] Wu G M, Shyng Y T, Kung S F, et al. Oxygen plasma processing and improved interfacial adhesion in PBO fiber reinforced epoxy composites. Vacuum, 2009, 83(S1): 5271-5274.

[11] Wang Bin, Jin Zhihao, Qiu Zheming, et al. Effect of coupling agent on interfacial adhesion of poly(p-phenylene benzobisoxazole) fiber/epoxy matrix composites. Journal of Xi'an Jiaotong University, 2002, 36(9): 975-978.

[12] Zhang Tao, Hu Dayong, Jin Junhong, et al. Improvement of surface wettability and interfacial adhesion ability of poly (p-phenylene benzobisoxazole) (PBO) fiber by incorporation of 2,5-dihydroxyterephthalic acid (DHTA). European Polymer Journal, 2009, 45(1): 302-307.

[13] 祁景玉. 现代分析测试技术.上海: 同济大学出版社, 2006: 326-339.

[14] Zhang Xin, Liu Shun-hua, Duan Yu-ping, et al. Electromagnetic characteristics of carbon black doped with nanometer manganese dioxide. Journal of Aeronautical Materials, 2007, 2(27): 58-62.

[15] 殷之文.电介质物理学.北京:科学出版社, 2003: 561.

[16] 刘顺华,刘军民, 董星龙.电磁波屏蔽及吸波材料.北京:化学工业出版社, 2006: 223.

[17] Wu K H, Ting T H, Wang G P, et al. Effect of carbon black content on electrical and microwave absorbing. Polymer Degradation and Stability, 2008, 93(2): 483-488.