Wang Mingqiang, Zhang Shuai, Dong Jidong, Song Yuanjun, Mao Jiao, Xie Huaquan, Qian Yue, Huang Yudong, Jiang Zaixing
MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China.
Interdisciplinary Nanoscience Center (iNANO), Aarhus University, DK-8000 Aarhus C, Denmark.
Polymers (Basel). 2016 Jul 4;8(7):251. doi: 10.3390/polym8070251.
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(-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.
引入碳基纳米纤维的聚合物基体展现出迷人的性能。它们激发了对聚合物复合材料合成的广泛研究，这些复合材料已应用于催化、电子和能量存储领域。在本报告中，我们报道了一种简便高效的方法，通过原位聚合制备聚对苯撑苯并双恶唑（PBO）/纳米石墨烯（PNG）复合纤维，同时伴随着从（氧化纳米石墨烯）NGO到（纳米石墨烯）NG的还原。通过调整PBO单体与NGO的进料比例，获得了NG含量为0.1⁻1 wt%的各种复合纤维。高效的PBO链接枝使NG均匀分散在PBO基体中，还提高了PBO链堆积取向的均匀性。因此，所得PNG复合纤维的拉伸强度、拉伸模量和热稳定性得到了显著提高。此外，与纯PBO纤维相比，含0.5 wt% NG的复合纤维的拉伸强度提高了25%，拉伸模量提高了41%。这表明NG对PBO复合纤维具有优异的增强作用。
