Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing hexagonal boron nitride coating on surface of carbon fiber material

A technology of hexagonal boron nitride and carbon fiber, which is applied in the fields of carbon fiber, fiber treatment, textiles and papermaking, etc., can solve the problems of biological toxicity, high surface tension, and easy methanol volatilization, and achieve good electrical insulation properties, control coating The effect of simple layer thickness and preparation process

Inactive Publication Date: 2018-10-12
XIAN CHAOMA SCI TECH
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology has the following disadvantages in the preparation of hexagonal boron nitride coatings: firstly, methanol in aqueous methanol solution is volatile and has biological toxicity, and human body inhalation will damage retinal nerves, so it is difficult to use in batches in industrial production; secondly, methanol in aqueous methanol solution The surface tension of water is large, and cracks are prone to appear during the drying and dehydration process of the coating. However, due to the strong oxidation characteristics of high-temperature water vapor during the dehydration process of boric acid and urea, the surface of carbon fibers will be oxidized and damaged, which seriously affects the carbon fiber surface. The strength and toughness of the coating limit the engineering application of the coating

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing hexagonal boron nitride coating on surface of carbon fiber material
  • Method for preparing hexagonal boron nitride coating on surface of carbon fiber material
  • Method for preparing hexagonal boron nitride coating on surface of carbon fiber material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 Shown, the preparation method of the present embodiment comprises the following steps:

[0028] Step 1. Carbon fiber surface pretreatment: put the carbon fiber in acetone for 36 hours to remove the epoxy organic matter on the surface of the carbon fiber, then ultrasonically treat it for 20 minutes to fully disperse the carbon fiber fibroin into monofilaments, and then wash it with distilled water for 3 times Then place it in a vacuum drying oven at 60°C for 8 hours, and finally place it in a muffle furnace at 300°C for surface activation treatment on the carbon fiber for 25 minutes;

[0029] Step 2. Precursor preparation: use boric acid as the boron source of the hexagonal boron nitride coating, and urea as the nitrogen source of the hexagonal boron nitride coating. The mass ratio of the boric acid and urea is 1:2, and the boric acid and urea are mixed After uniformity, heat and melt in a vacuum drying oven at a temperature of 180°C, and stir for 10 mi...

Embodiment 2

[0036] Such as figure 1 Shown, the preparation method of the present embodiment comprises the following steps:

[0037] Step 1. Carbon fiber surface pretreatment: put the carbon fiber in acetone for 24 hours to remove the epoxy organic matter on the surface of the carbon fiber, then ultrasonically treat it for 30 minutes to fully disperse the carbon fiber fibroin into monofilaments, and then wash it 4 times with distilled water Then place it in a vacuum drying oven at 70°C for 12 hours, and finally place it in a muffle furnace at 350°C for surface activation treatment on the carbon fiber for 20 minutes;

[0038] Step 2. Precursor preparation: use boric acid as the boron source of the hexagonal boron nitride coating, and urea as the nitrogen source of the coating. The mass ratio of the boric acid and urea is 1:2. Mix the boric acid and urea evenly and place Heat and melt in a vacuum drying oven at a temperature of 170°C, and stir for 20 minutes to obtain a uniform liquid precu...

Embodiment 3

[0045] Such as figure 1 Shown, the preparation method of the present embodiment comprises the following steps:

[0046] Step 1. Carbon fiber surface pretreatment: put the carbon fiber in acetone for 48 hours to remove the epoxy organic matter on the surface of the carbon fiber, then ultrasonically treat it for 30 minutes to fully disperse the carbon fiber fibroin into monofilaments, and then wash it with distilled water for 4 times Then place it in a vacuum drying oven at 70°C for 12 hours, and finally place it in a muffle furnace at 350°C for surface activation treatment on the carbon fiber for 30 minutes;

[0047] Step 2. Precursor preparation: use boric acid as the boron source of the hexagonal boron nitride coating, and urea as the nitrogen source of the coating. The mass ratio of the boric acid and urea is 1:3. Mix the boric acid and urea evenly and place Heat and melt in a vacuum drying oven at a temperature of 160°C, and stir for 30 minutes to obtain a uniform liquid p...

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

PUM

PropertyMeasurementUnit
oxidation rateaaaaaaaaaa
electrical resistivityaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a hexagonal boron nitride coating on the surface of a carbon fiber material. The method comprises the following steps: carrying out surface pretreatmenton the carbon fiber material, impregnating the surface-pretreated carbon fiber material in a liquid precursor which is a mixed solution formed by mixing molten boric acid and urea which are respectively used as the boron source and the nitrogen source for hexagonal boron nitride, carrying out supercooling crystallization, and finally carrying out heat treatment in a nitrogen atmosphere furnace toobtain carbon fibers with the hexagonal boron nitride coating on the surface. The hexagonal boron nitride coating prepared on the surface of the carbon fiber material does not affect the strength or the toughness of the carbon fiber material, and the method has the advantages of simple process, low cost, dense coating, firmness in bonding, and the like, is suitable for carbon fiber tows, carbon cloths and fiber preforms, and has a significant application potential in engineering practices.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber surface coating preparation, and in particular relates to a preparation method of a hexagonal boron nitride coating on the surface of a carbon fiber material. Background technique [0002] Carbon fiber is a spinnable fiber material with comprehensive excellent properties such as light weight, high strength, high modulus, corrosion resistance, low expansion, anti-fatigue, self-lubrication and good biocompatibility. It is the most important element of modern advanced composite materials. One of the reinforcements, as a strategic basic material and a typical military-civilian dual-use material, it has a wide range of application values ​​in the fields of aerospace, building materials, transportation facilities, sports and medical equipment. In recent years, with the maturity and improvement of domestic carbon fiber preparation technology, the application of carbon fiber reinforced ceramic compos...

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

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/80D06M101/40
CPCD06M11/80D06M2101/40C04B35/62655C04B35/62675C04B35/62868C04B35/62886C04B35/62897C04B2235/3409C04B2235/5248C04B2235/5252C04B2235/606C04B2235/616C04B2235/96
Inventor 杨万利代丽娜张瀚晨姚西明樊振宁
Owner XIAN CHAOMA SCI TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com