Study of crystal structure and properties of poly(vinylidene fluoride)/graphene composite fibers,Polymer International

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Study of crystal structure and properties of poly(vinylidene fluoride)/graphene composite fibers
Polymer International ( IF 2.9 ) Pub Date : 2021-07-24 , DOI: 10.1002/pi.6279
Jingjing Yan ₁ , Changfa Xiao _{1,

2} , Yan Huang ₃ , Tai Zhang ₁

Affiliation

Poly(vinylidene fluoride) (PVDF) nascent composite fibers were prepared through the melt-spinning method with different graphene (GE) contents, following which post-stretched composite fibers were obtained using a post-stretching process under thermal treatment condition. The effects of GE content and post-stretching ratio on the crystal structure and properties of the fibers were investigated in order to obtain PVDF composite fibers with high β crystal content and high hydrophobicity and oleophilicity. The results indicated that the addition of GE led to some extent to an improvement in the content of β crystals and the orientation of crystals. Furthermore, the addition of GE obviously improved the mechanical properties, hydrophobicity and oleophilicity of nascent composite fibers. The post-stretching ratio had a significant influence on the transition of the crystal phase from α to β and the orientation of crystals. In addition, the post-stretching played a positive role in enhancement of mechanical properties and hydrophobicity. When 5 wt% GE was added and the post-stretching ratio was 6, PVDF composite fibers with high β crystal content, super-oleophilicity and high hydrophobicity could be obtained. The β crystal content of PVDF composite fibers could reach 62.8%, oil contact angle was 0° and water contact angle was 116.0°. © 2021 Society of Industrial Chemistry.

中文翻译：

聚偏二氟乙烯/石墨烯复合纤维的晶体结构与性能研究

采用熔融纺丝法制备了不同石墨烯（GE）含量的聚偏二氟乙烯（PVDF）新生复合纤维，然后在热处理条件下通过后拉伸工艺获得了后拉伸复合纤维。研究了GE含量和后拉伸倍率对纤维晶体结构和性能的影响，以获得高β晶含量和高疏水亲油性的PVDF复合纤维。结果表明，GE的加入在一定程度上提高了β含量晶体和晶体的取向。此外，GE的加入显着改善了新生复合纤维的力学性能、疏水性和亲油性。后拉伸比对晶相从α到β的转变和晶体的取向有显着影响。此外，后拉伸对提高机械性能和疏水性也起到了积极的作用。当加入5wt%GE、后拉伸倍率为6时，可获得β晶含量高、超亲油性和高疏水性的PVDF复合纤维。该βPVDF复合纤维的结晶含量可达62.8%，油接触角为0°，水接触角为116.0°。© 2021 工业化学学会。

更新日期：2021-07-24

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