静电纺丝法制备聚丙烯腈纳米纤维
发布时间：2019-06-08 13:44
【摘要】：聚丙烯腈纳米纤维由于具有许多独特的性质和潜在应用价值,近年来受到人们的广泛关注。但由于通过静电纺丝法制备这种纳米纤维往往是以纤维毡的状态出现,而制备出定向性好的纳米纤维束一直是人们所追求的。本文旨在制备缺陷较少、纤维直径较均一、定向性良好的PAN和MWNTs/PAN纳米纤维束。 采用过硫酸铵-N,N,N,N四甲基乙二胺氧化还原体系为引发剂,通过水相沉淀聚合法合成了以丙烯腈为第一单体的共聚物,该法适合生产平均分子质量较高的聚合物。为提高碳纳米管的分散性,通过原位聚合法合成了MWNTs-PAN共聚物。使用乌氏粘度计、IR、XRD、DSC等方法对聚合物进行了分析。 以二甲基甲酰胺为溶剂配成纺丝液,静电纺丝法制备纳米纤维。研究制备优质纤维的纺丝条件与工艺。纺丝过程采用不同的接收装置,研究了转盘接收装置和转速对接收定向纤维的作用。实验过程中使用SEM和TEM分析方法研究了纺丝过程中纺丝条件对纤维直径形貌等的影响;采用多种手段表征了MWNTs对聚合物结构、性能、纤维形貌、直径以及直径分布的影响。
[Abstract]:Polyacrylic nanofibers have been paid more and more attention in recent years because of their unique properties and potential application values. However, the preparation of this kind of nanofiber by electrospinning often appears in the state of fiber felt, and the preparation of nanofiber bundles with good orientation has always been pursued by people. The purpose of this paper is to prepare PAN and MWNTs/PAN nanofiber bundles with few defects, uniform fiber diameter and good orientation. The polymer with acrylic as the first monomer was synthesized by aqueous precipitation polymerization with ammonium persulfate-N, N-tetramethyl ethylenediamine redox system as initiator. The method is suitable for the production of polymers with higher average molecular weight. In order to improve the dispersion of carbon nanotube (CNT), MWNTs-PAN copolymer was synthesized by in situ polymerization. The polymer was analyzed by Wu's viscometer and IR,XRD,DSC. Nanofibers were prepared by electrospinning with dimethyl formamide as solvent. The spinning conditions and process of preparing high quality fiber were studied. The effect of rotating disk receiving device and rotating speed on receiving directional fiber was studied by using different receiving devices in spinning process. In the course of the experiment, the effects of spinning conditions on the morphology of fiber diameter were studied by SEM and TEM, and the effects of MWNTs on the structure, properties, fiber morphology, diameter and diameter distribution of the polymer were characterized by various means.
【学位授予单位】：黑龙江大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TQ342.31
本文编号：2495327
[Abstract]:Polyacrylic nanofibers have been paid more and more attention in recent years because of their unique properties and potential application values. However, the preparation of this kind of nanofiber by electrospinning often appears in the state of fiber felt, and the preparation of nanofiber bundles with good orientation has always been pursued by people. The purpose of this paper is to prepare PAN and MWNTs/PAN nanofiber bundles with few defects, uniform fiber diameter and good orientation. The polymer with acrylic as the first monomer was synthesized by aqueous precipitation polymerization with ammonium persulfate-N, N-tetramethyl ethylenediamine redox system as initiator. The method is suitable for the production of polymers with higher average molecular weight. In order to improve the dispersion of carbon nanotube (CNT), MWNTs-PAN copolymer was synthesized by in situ polymerization. The polymer was analyzed by Wu's viscometer and IR,XRD,DSC. Nanofibers were prepared by electrospinning with dimethyl formamide as solvent. The spinning conditions and process of preparing high quality fiber were studied. The effect of rotating disk receiving device and rotating speed on receiving directional fiber was studied by using different receiving devices in spinning process. In the course of the experiment, the effects of spinning conditions on the morphology of fiber diameter were studied by SEM and TEM, and the effects of MWNTs on the structure, properties, fiber morphology, diameter and diameter distribution of the polymer were characterized by various means.
【学位授予单位】：黑龙江大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TQ342.31
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