Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention discloses a preparation method and application of polyacrylonitrile functionalized carbon nanotube composite fibers. The method comprises the following steps: preparing a high-purity [Bmim]Cl/CNT system from acrylonitrile/acrylamide binary copolymer PAN as a raw material, hydroxyl/carboxyl functionalized carbon nanotubes (SWCNT/MWCNT) as a reinforcing material, [Bmim]Cl as a plasticizer and A151 as a dispersant by adopting an in-situ synthesis method, uniformly mixing by adopting a mechanical blending method, granulating after extrusion, and carrying out plasticization melt spinning, whereinthe temperature of a melt blending area cannot be higher than 180 DEG C; and finally, enabling the prepared nascent fiber to be subjected to secondary water bath drafting, and the composite fiber is obtained. By strictly controlling raw materials, key spinning procedures and processes, the carbon nanotubes are promoted to be uniformly distributed in polyacrylonitrile fibers, and meanwhile, the composite fibers have fewer surface defects and circular sections; and the compressive property of the fiber concrete is effectively improved by a perfect morphological structure.
本发明公开了一种聚丙烯腈‑功能化碳纳米管复合纤维的制备方法及其应用。该方法选择丙烯腈/丙烯酰胺二元共聚物PAN为原料，羟基/羧基功能化碳纳米管(SWCNT/MWCNT)为增强材料，[Bmim]Cl为增塑剂，A151为分散剂，采用原位合成方法制备高纯度[Bmim]Cl/CNT体系，再通过机械共混方法混合均匀后，挤出后切粒，再进行增塑熔融纺丝，熔融共混区温度不能高于180℃，最后将制备的初生纤维进行二级水浴牵伸，即得复合纤维。通过对原料、关键纺丝工序及工艺的严格把控，促使碳纳米管在聚丙烯腈纤维中均匀分布，同时复合纤维表面缺陷较少，截面为圆形；完善的形态结构有效提高纤维混凝土的抗压性能。
The invention discloses a preparation method and application of polyacrylonitrile functionalized carbon nanotube composite fibers. The method comprises the following steps: preparing a high-purity [Bmim]Cl/CNT system from acrylonitrile/acrylamide binary copolymer PAN as a raw material, hydroxyl/carboxyl functionalized carbon nanotubes (SWCNT/MWCNT) as a reinforcing material, [Bmim]Cl as a plasticizer and A151 as a dispersant by adopting an in-situ synthesis method, uniformly mixing by adopting a mechanical blending method, granulating after extrusion, and carrying out plasticization melt spinning, whereinthe temperature of a melt blending area cannot be higher than 180 DEG C; and finally, enabling the prepared nascent fiber to be subjected to secondary water bath drafting, and the composite fiber is obtained. By strictly controlling raw materials, key spinning procedures and processes, the carbon nanotubes are promoted to be uniformly distributed in polyacrylonitrile fibers, and meanwhile, the composite fibers have fewer surface defects and circular sections; and the compressive property of the fiber concrete is effectively improved by a perfect morphological structure.
本发明公开了一种聚丙烯腈‑功能化碳纳米管复合纤维的制备方法及其应用。该方法选择丙烯腈/丙烯酰胺二元共聚物PAN为原料，羟基/羧基功能化碳纳米管(SWCNT/MWCNT)为增强材料，[Bmim]Cl为增塑剂，A151为分散剂，采用原位合成方法制备高纯度[Bmim]Cl/CNT体系，再通过机械共混方法混合均匀后，挤出后切粒，再进行增塑熔融纺丝，熔融共混区温度不能高于180℃，最后将制备的初生纤维进行二级水浴牵伸，即得复合纤维。通过对原料、关键纺丝工序及工艺的严格把控，促使碳纳米管在聚丙烯腈纤维中均匀分布，同时复合纤维表面缺陷较少，截面为圆形；完善的形态结构有效提高纤维混凝土的抗压性能。
Preparation method and application of polyacrylonitrile-functionalized carbon nanotube composite fibers
一种聚丙烯腈-功能化碳纳米管复合纤维的制备方法及其应用
30.04.2021
Patent
Elektronische Ressource
Chinesisch
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