Abstract
The polymer matrix with introduced carbon-based nanofiber displays fascinating properties. They have inspired extensive research on the synthesis of polymer composites, which have been applied in catalysis, electronics, and energy storage. In this report, we reported a facile and efficient method to prepare poly(p-phenylene benzobisoxazole) (PBO)/nanographene (PNG) composites fibers via in-situ polymerization, accompanied by the reduction from (nanographene oxide) NGO to (nanographene) NG. By tuning the ratio of feeding PBO monomer to NGO, various composites fibers with 0.1–1 wt % contents of NG were obtained. The efficient PBO chains grafting made NG uniformly disperse in the PBO matrix, and it also increased the uniformity of the packing orientation of PBO chains. Consequently, the tensile strength, tensile modulus, and thermal stability of the obtained PNG composites fibers had been improved significantly. In addition, the composites fibers with 0.5 wt % NG exhibited a 25% increment in tensile strength, and a 41% enhancement in tensile modulus compared with neat PBO fibers. It reveals an excellent reinforcement to PBO composites fibers with NG.
Highlights
Graphene, as being a single-layer two-dimensional nano-carbon material, has been widely investigated since its first discovery in 2004 [1]
The samples of Nanographene oxide (NGO) and PNG composites were characterized by Transmission electron microscopy (TEM: JEOL JEM-2010 operating at 200kV (Japan Electronics Co., Ltd., Tokyo, Japan), Fourier-transform infrared (FT-IR) spectrometer (Nicolet Nexus 670)
The excessive carboxyl groups on NGO in the process of condensation polymerization disrupted the proportion between carboxyl groups and amino groups in the reaction system, which terminated the increasing of active chains
Summary
Mingqiang Wang 1,† , Shuai Zhang 2,† , Jidong Dong 1,† , Yuanjun Song 1 , Jiao Mao 1 , Huaquan Xie 1 , Yue Qian 1 , Yudong Huang 1, * and Zaixing Jiang 1,2, *.
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