Submicron heterocyclic aramid fiber and preparation method thereof

A technology for spinning heterocyclic aramid fibers and heterocyclic aramid fibers, which is applied in the directions of fiber treatment, spinning solution preparation, fiber chemical characteristics, etc., can solve the problems of high hardness and large size of heterocyclic aramid fibers, and achieve excellent flexibility. performance, low equipment requirements, and the effect of reducing surface tension
CN114686997AActive Publication Date: 2022-07-01TSINGHUA UNIV
5 Cites 1 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2022-07-01

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a submicron heterocyclic aramid fiber and a preparation method thereof. By regulating and controlling the raw material adding proportion, reaction parameters and the viscosity of the obtained polymer in the diamine monomer and diacyl chloride polymerization process, the surface tension of the heterocyclic aramid fiber spinning solution and the extrusion swelling effect during spinning are greatly reduced, and the stability and spinnability of the heterocyclic aramid fiber spinning solution are improved; spinning the heterocyclic aramid fiber spinning solution through an air flow spinning process to finally obtain the submicron fiber with the diameter of 100 nm to 1 mu m, and the fiber has excellent flexibility; and finally, the submicron heterocyclic aramid fiber can be prepared into different material forms through different collection modes, which is beneficial to widening the processing mode and application field of a later product. The preparation method of the submicron heterocyclic aramid fiber provided by the invention is simple in process, energy-saving, environment-friendly, efficient and low in equipment requirement, can be well compatible with the existing process, and has great large-scale application potential.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The application belongs to the technical field of preparation of heterocyclic aramid fibers, and in particular relates to a submicron heterocyclic aramid fiber and a preparation method thereof. Background technique

[0002] Heterocyclic aramid fiber has the properties of light weight, high strength, high toughness, heat resistance, flame retardant and excellent wave-transmitting insulation, etc. It can be used as a multi-purpose composite material integrating bulletproof, stealth and other functions. It has important application value in the fields of aerospace, national defense and military industry.

[0003] However, due to the influence of the viscosity, stability and spinning technology of the heterocyclic aramid spinning solution, the current heterocyclic aramid fibers mainly exist in the form of micron-sized fibers, and the hardness of the micron-sized heterocyclic aramid fiber fabrics is relatively high. high, and it is difficult to prepare sma...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More