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Surface nanometer coating modified fiber and preparation method thereof

A coating and modification technology, applied in the direction of fiber type, fiber treatment, textile and papermaking, etc., can solve the problems of poor compression performance, weak compression performance, poor mechanical properties of composite materials, etc. Effect

Inactive Publication Date: 2018-10-23
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, ultra-high molecular weight polyethylene fibers, although the axial tensile properties of the fibers are strong, but the radial compression properties are weak, which limits the application of fibers in fiber-reinforced composite materials.
[0003] In fiber-reinforced composite materials, fibers have high-strength and high-modulus properties, and fibers act as reinforcements to carry most of the load. Most of the high mechanical properties of composite materials are reflected in the tensile failure of fibers, that is, the excellent mechanical properties have directional properties. , and the mechanical properties in the radial direction of the fibers, especially the compressive properties, are usually poor, which leads to poor overall mechanical properties of the composite material, which greatly limits the further expansion of its application range.

Method used

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  • Surface nanometer coating modified fiber and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In this embodiment, the surface nano-coated modified fiber includes polyester fiber and a coating layer coated on the polyester fiber surface from the inside to the outside, and the coating layer includes carbon nanotubes coated on the polyester fiber surface The nanoparticle coating and the polypyrrole outer coating coated on the carbon nanotube nanoparticle coating surface, wherein, the mass ratio of the polyester fiber and the coating layer is 1:0.2, and the carbon nanotube nanoparticle coating and The mass ratio of polypyrrole outer coating is 1:12.

[0026] In the present embodiment, the method for preparing the fiber modified by surface nano-coating, the specific steps are as follows:

[0027] 1) Nano-suspension configuration: get an aqueous solution containing polyethyleneimine with a concentration of 0.5wt% and ferric chloride with a concentration of 2mol / L, and then add carbon nanotube nanoparticles (CNTs) acidified with 60% nitric acid for 1h. ) 1wt%, and at ...

Embodiment 2

[0031] This embodiment is the same as Example 1, and the difference is that the organic fiber is an ultra-high molecular weight polyethylene fiber in the present embodiment, and the raw material of the nanoparticle coating is a vapor-phase grown carbon fiber (VGCF);

[0032] The addition of VGCF nanoparticles is 2wt% in the step (1);

[0033] The drying temperature in step (2) is 95°C.

[0034] The topography of the VGCF particle adhesion-pyrrole-coated nano-coated ultra-high molecular weight polyethylene fiber prepared in Example 2 is as follows figure 1 As shown, the uniform distribution of nanoparticles can be seen.

Embodiment 3

[0036] The present embodiment is the same as embodiment 1, and the difference is that in the present embodiment, the organic fiber is a phenylene benzobisoxazole fiber (PBO), and the raw material of the nanoparticle coating is graphene;

[0037] In step (1), the mixed solution is an aqueous solution containing polyethyleneimine with a concentration of 1.5wt% and ferric chloride with a concentration of 2mol / L. The graphene is acidified with 60% nitric acid for 2h and ultrasonically treated for 1min. The addition amount of particle is 2wt%,

[0038] Soak in step (2) for 6 hours, the drying temperature is 95°C, and the duration is 5 minutes;

[0039] Vapor deposition in step (3) for 20 minutes.

[0040] Performance comparison:

[0041] When the transverse compressive strain rate was 0.4, the radial compressive modulus of the unprocessed ultra-high molecular weight polyethylene (UHMWPE1) was 0.025Gpa, and the modified ultra-high molecular weight polyethylene (UHMWPE2) prepared b...

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Abstract

The invention discloses surface nanometer coating modified fiber and a preparation method thereof, and belongs to the technical field of fiber surface modification. The preparation method comprises the steps that the surface of the organic fiber is coated with a nano-particle coating in a liquid phase mode and a polypyrrole outer coating in a gas phase mode, liquid-phase coating is beneficial foreven dispersion of different nano-particles on the surface of fiber, and gas-phase coating can make the nano-particles be isotropous coating. A layer of even nano-particle coating is formed on the surface of the fiber provided by the invention, the radial mechanical property of the fiber is obviously enhanced after fiber is utilized for producing a fiber compound material, the interface property between polymer matrixes can be improved, and accordingly the mechanical property of the compound material is improved. The surface nanometer coating modified fiber overcomes the defects that the equipment is complex in a radiation method, and the cost is high, meanwhile the body of the fiber is not damaged, and a brand-new method is provided so as to improve the radial compressive property of thefiber.

Description

technical field [0001] The invention belongs to the technical field of fiber surface modification, and in particular relates to a fiber surface modified by nano-coating and a preparation method thereof. Background technique [0002] In the prior art, industrial yarns, chemical fiber filaments and high-performance fibers are materials with a high aspect ratio, and their properties have strong anisotropy, which is manifested in the radial and axial mechanical properties of the fibers. For example, ultra-high molecular weight polyethylene fibers have strong axial tensile properties, but weak radial compressive properties, which limits the application of fibers in fiber-reinforced composite materials. [0003] In fiber-reinforced composite materials, fibers have high-strength and high-modulus properties, and fibers act as reinforcements to carry most of the load. Most of the high mechanical properties of composite materials are reflected in the tensile failure of fibers, that is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/74D06M15/37D06M101/32D06M101/20D06M101/30
CPCD06M11/74D06M15/37D06M2101/20D06M2101/30D06M2101/32
Inventor 阮芳涛鲍力民徐珍珍邹梨花张思凡宋雪旸岳阳
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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