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Aromatic polymer fiber with excellent interfacial properties and preparation method thereof

An aromatic polymer, interface performance technology, applied in fiber processing, fiber types, textiles and papermaking, etc., can solve problems such as fiber interface damage, improve compatibility, improve composite interface performance, and improve fiber surface roughness Effect

Active Publication Date: 2021-08-13
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high orientation of the cortex itself, the defect will quickly expand and extend along the axial direction of the fiber cortex, similar to the tearing of the strip-like cortex of bamboo, and eventually lead to fiber interface damage

Method used

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  • Aromatic polymer fiber with excellent interfacial properties and preparation method thereof
  • Aromatic polymer fiber with excellent interfacial properties and preparation method thereof
  • Aromatic polymer fiber with excellent interfacial properties and preparation method thereof

Examples

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preparation example Construction

[0050] 1. Preparation of aromatic polymer fibers containing fluorine on the surface:

[0051] (1.1) the preparation of aramid fiber (aramid fiber II, aramid fiber III) used in the present invention:

[0052] Poly(paraphenylene terephthalamide) fiber (aramid fiber II) is obtained by polymerizing and spinning two monomer raw materials of terephthaloyl chloride (TPC) and p-phenylenediamine (PDA). The molar ratio of phthaloyl chloride to p-phenylenediamine is 1:1.

[0053] Aromatic heterocyclic polyamide fiber (aramid III) is composed of three kinds of terephthaloyl chloride, p-phenylenediamine and 5(6)-amino-2-(4-aminophenyl) benzimidazole (PABZ). The monomer is prepared by polymerizing raw materials and spinning, and the ratio of terephthaloyl chloride: p-phenylenediamine: 5(6)-amino-2-(4-aminophenyl)benzimidazole is 100:50 :50.

[0054] (1.2) With reference to the methods disclosed in the invention patents CN 101798748 A and CN 104911895A already authorized by the applicant,...

Embodiment 1

[0066] Use the above method (1.2) to fluorinate the aramid fiber III under the condition that the fluorine partial pressure is 1.5KPa and the nitrogen partial pressure is 15KPa to obtain the aramid fiber III with fluorine on the surface, and then dynamically pass through 25 ℃ contains a mixed solution of carbon nanotube derivatives and aromatic polyamide (the aromatic polyamide is obtained by polymerization of monomer molar ratio PABZ:TPC=10:10), the solution of carbon nanotube derivatives in the mixed solution The mass fraction is 0.01%, the mass fraction of the aromatic polyamide polymer solution is 0.5%, soaking for 0.5 minutes, coagulating and drying, and then heat-treating at 360°C to obtain the aromatic polymer fiber of the present invention. The preparation process of the aromatic polymer fiber is as follows figure 1 shown.

[0067] The obtained aromatic polymer fiber was added to E-51 epoxy resin matrix to prepare a corresponding composite material, and the mass fract...

Embodiment 2

[0069] Use the above-mentioned method (1.2) to fluorinate the aramid fiber III under the condition that the partial pressure of fluorine gas is 5KPa and the partial pressure of nitrogen gas is 60KPa, so as to obtain the aramid fiber III with fluorine on the surface, and then dynamically pass through 0 ℃ contains a mixed solution of carbon nanotube derivatives / aromatic polyamide (the aromatic polyamide is obtained by polymerization of the monomer molar ratio PDA:PABZ:TPC=5:5:10), and the carbon nanotubes in the mixed solution The mass fraction of the derivative solution is 0.0025%, the mass fraction of the aromatic polyamide polymer solution is 0.2%, soaking for 2 minutes, coagulating and drying, and then heat-treating to obtain the aromatic polymer fiber of the present invention.

[0070] The obtained aromatic polymer fiber was added to E-51 epoxy resin matrix to prepare a corresponding composite material, and the mass fraction of the aromatic polymer fiber in the composite mat...

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Abstract

The invention discloses a carbon nanotube derivative, which is a carbon nanotube modified by an aromatic polyamide macromolecule. The invention also discloses the aromatic polymer fiber prepared by using the aramid fibers containing fluorine on the surface, the above-mentioned carbon nanotube derivatives and aromatic polyamide as raw materials. The orientation degree of the new skin layer of the aromatic polymer fiber is reduced, the polarity is increased, and the direct adhesion between the fiber and the resin matrix at the interface is improved. Using it to prepare epoxy resin composite materials, the tensile strength and interlayer shear of the dipped wire The strength is significantly improved and has broad application prospects.

Description

technical field [0001] The invention belongs to the field of aromatic polymers, and in particular relates to an aromatic polymer fiber with excellent interface properties and a preparation method thereof. Background technique [0002] Aramid fiber, also known as aramid fiber, is a high-strength, high-modulus, high-temperature-resistant high-performance organic fiber. Since DuPont began to produce the first generation of Kevlar fiber in the 1970s, it has gained great popularity in various military and civilian fields. The development of aramid fiber, especially as a structural reinforcement for the preparation of resin-based high-performance composite materials, shows a trend of all-round replacement of traditional metal alloy materials. However, as a reinforcement of composite materials, aramid fiber has always faced the problem of poor interface performance of composite materials. The interface shear strength between it and epoxy resin is only 30MPa, which is far lower than...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/74D06M15/59C08G69/28C08G69/32C08J5/06C08L63/00D06M101/36
CPCC08G69/28C08G69/32C08J5/046C08J5/06C08J2363/00C08J2477/10D06M11/74D06M15/59D06M2101/36
Inventor 刘向阳程政罗龙波刘洋王旭吕鈞炜刘昌莉
Owner SICHUAN UNIV
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