物理化学学报2023，Vol.39Issue(10)：137-146,10.DOI:10.3866/PKU.WHXB202307046
亚微米尺寸、高结晶度石墨烯增强间位芳纶纤维力学性能
Submicron-Sized,High Crystalline Graphene-Reinforced Meta-Aramid Fibers with Enhanced Tensile Strength
摘要
Abstract
Aramid fiber is highly regarded for its outstanding properties and is widely used in various industrial applications.Among the different types of aramid fibers,meta-aramids,particularly poly(m-phenylene isophthalamide)(PMIA),are known for their exceptional flame retardance,high-temperature resistance,excellent electrical insulation,and remarkable chemical stability.As a result,PMIA-based materials find extensive use in industries focused on fire prevention,heat protection,and related applications.However,PMIA fibers have limitations due to the lack of conjugation between amide and benzene ring bonds in their molecular structure,resulting in flexible segments with low crystallinity,which in turn leads to inferior mechanical strength.Researchers have shown great interest in nanocomposites as a means to overcome these limitations.In this context,graphene nanocomposites have gained significant attention.Graphene,with its benzene ring arrangement within its layers,easily bonds with polymers possessing a similar structure.This property makes graphene a promising candidate for enhancing the mechanical strength of aromatic polymers like PMIA.Moreover,small-sized graphene particles exhibit superior dispersibility within fibrous polymer matrices,leading to more effective reinforcement compared to larger graphene sheets.Consequently,incorporating high-quality,small-sized graphene into polymer matrices can substantially improve the properties of these polymers.There is a growing demand for enhancing the mechanical characteristics of aramid fibers to expand their applications beyond traditional uses.This research demonstrates how sub-micron-sized graphene improves the structural integrity and mechanical strength of PMIA fibers.The results show a remarkable 46％enhancement in tensile strength compared to unmodified PMIA fibers.While the graphene/PMIA fiber exhibits exceptional mechanical properties,it also holds great potential for applications in wearables,flexible sensors,and various other domains,thanks to graphene's versatile characteristics.This research underscores the importance of utilizing small-sized,high-quality graphene to develop more robust carbonaceous nanocomposite fibers suitable for a wide range of commercial purposes.Beyond its immediate impact on PMIA fibers,this research represents a significant step forward in advancing the utilization and growth of graphene materials in various applications.关键词
亚微米级石墨烯/间位芳纶纤维/剪切分散/拉伸强度/内部结构优化Key words
Sub-micron-sized graphene/Meta-aramid fiber/Shear dispersion/Tensile strength/Internal structure optimization分类
化学化工引用本文复制引用
高振飞,于俊荣,张锦,宋清泉,肖志华,李兆龙,李涛,罗家俊,王珊珊,周万立,李兰英..亚微米尺寸、高结晶度石墨烯增强间位芳纶纤维力学性能[J].物理化学学报,2023,39(10):137-146,10.基金项目
The project was supported by the Ministry of Science and Technology of China(2022YFA1203302,2022YFA1203304,2016YFA0200100),National Natural Science Foundation of China(52021006,51720105003,21790052,52102035),Strategic Priority Research Program of CAS(XDB36030100),Beijing National Laboratory for Molecular Sciences(BNLMS-CXTD-202001),and Science Foundation of China University of Petroleum(Beijing)(ZX20230047).国家科技部(2022YFA1203302,2022YFA1203304,2016YFA0200100),国家自然科学基金(52021006,51720105003,21790052,52102035),中国科学院战略性先导科技专项(XDB36030100),北京分子科学国家研究中心(BNLMS-CXTD-202001)及中国石油大学(北京)科学基金(ZX20230047)资助项目 （2022YFA1203302,2022YFA1203304,2016YFA0200100）
