Method for modification of carbon fiber surface by use of metal organic framework

A metal-organic framework and fiber surface technology, which is applied in fiber processing, textiles and papermaking, can solve the problems of lower body strength, achieve the effect of improving surface properties and increasing tensile strength

Active Publication Date: 2015-12-09
宜兴环保产业有限公司
View PDF5 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the body strength of most carbon fibers decreases after surface modification, the present invention uses a novel metal-organic framework nanomaterial to graft the surface of carbon fibers, which significantly improves the surface activity of carbon fibers, and at the same time improves the surface activity of carbon fibers to a certain extent. body strength

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 modification of carbon fiber surface by use of metal organic framework
  • Method for modification of carbon fiber surface by use of metal organic framework
  • Method for modification of carbon fiber surface by use of metal organic framework

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. Clean the carbon fiber surface: put 2g of carbon fiber bundles into a Soxhlet extractor, add 150ml of acetone, wash at 70°C for 48h, put the cleaned carbon fiber in a vacuum oven and dry at 70°C for 10h.

[0020] 2. Surface pretreatment of the cleaned carbon fiber: Put the dried carbon fiber bundle into a single-mouth bottle, pour 100ml of concentrated nitric acid, completely immerse the carbon fiber in the concentrated nitric acid, and react at 80°C for 4 hours. The oxidized carbon fibers were taken out and washed repeatedly with clean water until neutral, and then put into a vacuum oven and dried at 70°C for 10 hours.

[0021] 3. Grafting metal-organic framework UiO-66-NH on the surface of pretreated carbon fibers 2 : put the carbon fiber bundle after surface pretreatment into ZrCl 4 And 2-aminoterephthalic acid in DMF solution, heated to 80 ° C for 24h. Rinse the treated carbon fiber bundles under clean water repeatedly.

[0022] 4. Ultrasonic treatment of mod...

Embodiment 2~9

[0023] Embodiment 2~9: with reference to embodiment 1, change parameter:

[0024]

[0025] Depend on figure 1 It can be seen that the surface of carbon fiber has polar groups such as -COOH and -OH after being oxidized by nitric acid. By working with UiO-66-NH 2 The precursor undergoes a coordination reaction, so that UiO-66-NH 2 grafted onto the carbon fiber surface.

[0026] Depend on figure 2 It can be seen that dense UiO-66-NH appeared on the surface of the grafted carbon fiber 2 Crystal particles, after EDX elemental analysis, mainly contain elements such as Zr, C, N and O.

[0027] Depend on image 3 It can be seen that the interfacial shear strength of the modified carbon fiber is increased by 44% and 32% respectively compared with the original carbon fiber and the nitrated carbon fiber.

[0028] Depend on Figure 4 It can be seen that the single filament tensile strength of the modified carbon fiber is increased by 25% and 30% respectively compared with the ...

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

A method for modification of carbon fiber surface by use of a metal organic framework belongs to the field of composite material interfacial modification. By combination of a new metal organic framework nanomaterial, a new carbon fiber surface modification method is provided, the main purpose is to solve the problem of carbon fiber body strength loss while improvement of carbon fiber surface energy of carbon fiber surface modification methods in the prior art. The preparation process is as follows: first, cleaning carbon fiber surface; second, pretreating the cleaned carbon fiber surface; third, grafting the pretreated carbon fiber surface with metal organic framework UiO-66-NH2; and fourth, ultrasonically processing the modified carbon fiber. Interfacial shear strength of the composite material prepared from the carbon fiber and epoxy E51 is increased by 44%, meanwhile the tensile strength of the carbon fiber is increased by 25%, and the composite material is used in aerospace, automotive, transportation, construction, chemical engineering and other fields.

Description

technical field [0001] The invention belongs to the field of interface modification of composite materials, and relates to a preparation method for graft modification of a novel carbon fiber surface metal-organic framework. Background technique [0002] As a composite reinforcement, carbon fiber has high strength, high modulus, low density, and good chemical and thermal stability. In recent years, it has been widely used in aerospace, military, electronics, transportation, construction and other fields. The untreated carbon fiber surface is inert, has poor wettability with the resin matrix, low bonding strength, and many interface defects, which greatly limit the advantages of carbon fiber. Therefore, improving the surface energy of carbon fibers through surface modification is crucial to the development of carbon fiber composites. At present, there are mainly two methods for surface modification of carbon fibers: oxidation and non-oxidation methods. Commonly used are ele...

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): D06M13/503D06M11/65
Inventor 邵路杨晓彬姜旭
Owner 宜兴环保产业有限公司
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