The matrix of poly(fluorinated ethylene‐propylene) (FEP) was modified with graphene (GE) as filler, and then the composite fibers were prepared by melt spinning method with a twin‐screw extruder. The effects of both the draw ratio and GE content on the structures and properties of FEP/GE composite fibers were investigated. The results showed that the addition of nanoparticles reduced the crystallization of molecular chains and the orientation of crystalline units in the fibers, while the drafting and heat setting process could effectively improve the crystallinity and orientation of composite fibers. Moreover, the addition of GE improved the mechanical properties of the composite fibers and had no effect on the chemical resistance of the composite fibers. A significant enhancement of mechanical properties of the composite fibers was obtained at low GE content, that, a 35.5% improvement of tensile strength and a 19.5% increase of Young's modulus were achieved at a GE content of only 0.3 wt%. Compared with pure FEP fibers, the oil affinity of composite fibers was also significantly improved. The prepared FEP/GE composite fibers that showed excellent chemical resistance have potential application in oil‐water separation, especially in high temperature resistant fibrous materials.

中文翻译：

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熔纺聚氟乙烯-丙烯/石墨烯复合纤维的制备及性能

用石墨烯（GE）改性聚氟乙烯-丙烯（FEP）的基体，然后用双螺杆挤出机通过熔融纺丝法制备复合纤维。研究了拉伸比和GE含量对FEP / GE复合纤维结构和性能的影响。结果表明，纳米粒子的加入减少了纤维中分子链的结晶和结晶单元的取向，而牵伸和热定形过程可以有效地改善复合纤维的结晶度和取向。而且，GE的添加改善了复合纤维的机械性能，并且对复合纤维的耐化学性没有影响。在低GE含量下，复合纤维的机械性能得到了显着提高，仅GE含量为0.3 wt％时，抗拉强度提高了35.5％，杨氏模量提高了19.5％。与纯FEP纤维相比，复合纤维的油亲和性也得到了显着提高。制备的具有优异耐化学性的FEP / GE复合纤维在油水分离中具有潜在的应用潜力，特别是在耐高温纤维材料中。