Surface modification method of quartz fiber

A technology of quartz fiber and surface modification, which is applied in the field of reinforcing materials for polymer matrix composites, and can solve problems such as difficulty in quartz fibers

Active Publication Date: 2006-06-14
HARBIN INST OF TECH
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for surface modification of quartz fibers to overcome the defect that quartz fibers are difficult to form a firm bond with the matrix through chemical or physical actions, so that the quartz fibers can easily form a firm bond with the matrix

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

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0004] The specific embodiment one: the present embodiment is realized through the following steps: one, the quartz fiber is soaked in the graft body solution, and the graft body is the ethanol solution of phenolic resin; two, the two are irradiated with gamma rays, The irradiation dose is 170 to 300kGy, and the quartz fiber taken out is the modified quartz fiber. The selection of the graft is based on two considerations: first, the graft is an active substance that can react chemically with the surface of the fiber under the irradiation of rays. Second, the graft contains functional groups that can react with the matrix resin, thereby forming a covalently bonded bridge between the fiber and the resin matrix, and enhancing the interfacial bonding energy of the composite material. The ethanol solution of phenolic resin is selected as the graft body of quartz fiber because phenolic resin and ethanol are the main components of the resin matrix of quartz fiber composite material, ...

specific Embodiment approach 2

[0005] Specific embodiment two: the difference between this embodiment and embodiment one is: the gamma ray source is 60 The Co source, the irradiation dose rate is 4.8kGy / h (kilogray / hour), and the irradiation dose is 200kGy (kilogray). On the one hand, gamma rays with appropriate energy can trigger the graft reaction between the graft body and the surface slurry of the quartz fiber, improving the interface strength. On the other hand, gamma rays with too high energy will etch the fiber and reduce the fiber body strength. Experiments show that when the irradiation dose reaches 200kGy, the interfacial shear strength (ILSS) of the quartz fiber / phenolic composite has increased by 55.5% compared with that of the unirradiated one. After continuing to increase the irradiation dose to 300kGy, the interfacial shear strength no longer increases. Therefore the present invention determines that 200kGy is the optimal irradiation dose. Other steps are the same as those in Embodiment 1. ...

specific Embodiment approach 3

[0006] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the mass percentage of the phenolic resin in the ethanol solution is 4 to 7%, and the optimum is 5%. When the concentration of the phenolic resin in the ethanol solution is higher than 5%, the surface coating of the quartz fiber is too thick, which affects the stress transmission between the resin matrix and the quartz fiber. When the concentration is lower than this value, as the concentration decreases, the active functional groups produced after the co-irradiation grafting reaction are less, and the degree of covalent bond formation at the interface after participating in the curing reaction of the phenolic resin is small, so the quartz fiber / phenolic composites have low interfacial properties. Therefore, 5% ethanol solution of phenolic resin is ideal as the medium for radiation modification. When the ethanol solution of 5% phenolic resin is used as the graft body of quartz fiber, the ILS...

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

No PUM Login to view more

Abstract

The present invention relates to a quartz fibre surface modification method. Said method includes the following steps: soaking quartz fibre in graft body solution, the described graft body is ethyl alcohol solution of phenol formaldehyde resin; irradiating both them by using gamma ray, its irradiation dose is 170-300KGy, taking out quartz fibre so as to obtain the invented modified quartz fibre.

Description

technical field [0001] The invention relates to a surface modification treatment method of quartz fiber, a reinforcing material for polymer-based composite materials. Background technique [0002] Due to the high SiO content in the quartz fiber 2 content and has many excellent properties, such as high purity, high temperature resistance, ablation resistance, low thermal conductivity, thermal shock resistance, excellent dielectric properties and good chemical stability, etc., so it is used in modern aviation, aerospace, electronics and weaponry and other fields have been more and more widely used. However, due to its relatively smooth surface, small surface area, and low surface energy, the active surface generally does not exceed 10% of the total surface and is hydrophobic, so it is difficult for quartz fibers to form a firm bond with the matrix through chemical or physical actions. combined. Contents of the invention [0003] The purpose of the present invention is to ...

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): C03C25/16C03C25/34
Inventor 刘丽黄玉东刘立洵王虎扬帆
Owner HARBIN INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap