Method for surface modification of carbon fibers by sizing agent containing carbon nanomaterials

A technology of surface modification and nanomaterials, applied in the direction of carbon fiber, fiber type, fiber treatment, etc., can solve the problems of poor fracture toughness, low interface strength, etc., and achieve the effect of improved mechanical properties, increased tensile strength, and good continuity

Inactive Publication Date: 2019-07-12
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for surface modification of carbon fiber by a sizing agent for carbon nanomaterials, aiming at solving the problems of poor interfacial fracture toughness and low interfacial strength of carbon fiber reinforced composite materials

Method used

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  • Method for surface modification of carbon fibers by sizing agent containing carbon nanomaterials
  • Method for surface modification of carbon fibers by sizing agent containing carbon nanomaterials
  • Method for surface modification of carbon fibers by sizing agent containing carbon nanomaterials

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Take 12 sections of T300B carbon fiber (15 cm each), soak them in acetone for 2 h, rinse them with deionized water, dry them in vacuum, and take them out for later use. Control the mass fraction of epoxy resin E-51 in DMF to be 0.5%, add E-51 to DMF, stir with a magnetic stirrer until E51 is completely dissolved, then add weighed GnP, CNTs and TETA, and finally The beaker was placed in an ultrasonic cell pulverizer for ultrasonication for 2 h to prepare a GnP-CNTs sizing agent with a mass fraction of 0.4%. The mass ratio of GnP and CNTs in the sizing agent was 1:4, and the mass ratio of E51 and TETA was 20:1. Pour the GnP-CNTs sizing agent into the aluminum box, then put the spare CF in the GnP-CNTs sizing agent and completely immerse it, take it out after 10 s and scrape off the residual liquid droplets on the fiber, and finally fix the CF on both sides of the aluminum box. The ends were dried in a vacuum oven at 60°C for 1 h, and the modified CF was obtained.

Embodiment 2

[0020] Take 12 sections of T300B carbon fiber (15 cm each), soak them in acetone for 2 h, rinse them with deionized water, dry them in vacuum, and take them out for later use. Control the mass fraction of epoxy resin E-51 in DMF to be 0.5%, add E-51 to DMF, stir with a magnetic stirrer until E51 is completely dissolved, then add weighed GnP, CNTs and TETA, and finally The beaker was placed in an ultrasonic cell pulverizer for 2 hours of sonication, and a GnP-CNTs sizing agent with a mass fraction of 0.4% was prepared. The mass ratio of GnP and CNTs in the sizing agent is 1:4, and the mass ratio of E51 and TETA is 20:1; pour the prepared GnP-CNTs sizing agent into the aluminum box, and then put the spare CF in the GnP-CNTs Completely submerged in the sizing agent, took it out after 20 s and scraped off the residual liquid droplets on the fiber, and finally fixed the CF on both ends of the aluminum box and dried it in a vacuum drying oven at 60°C for 1 h to obtain the modified C...

Embodiment 3

[0022] Take 12 sections of T300B carbon fiber (15 cm each), soak them in acetone for 2 h, rinse them with deionized water, dry them in vacuum, and take them out for later use. Control the mass fraction of epoxy resin E-51 in DMF to be 0.5%, add E-51 to DMF, stir with a magnetic stirrer until E51 is completely dissolved, then add weighed GnP, CNTs and TETA, and finally The beaker was placed in an ultrasonic cell pulverizer for ultrasonication for 2 h to prepare a GnP-CNTs sizing agent with a mass fraction of 0.4%. The mass ratio of GnP and CNTs in the sizing agent was 1:4, and the mass ratio of E51 and TETA was 20:1. Pour the GnP-CNTs sizing agent into the aluminum box, then put the spare CF in the GnP-CNTs sizing agent and completely submerge it, take it out after 30 s and scrape off the residual liquid droplets on the fiber, and finally fix the CF on both sides of the aluminum box. The ends were dried in a vacuum oven at 60°C for 1 h, and the modified CF was obtained.

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Abstract

The invention discloses a method for surface modification of carbon fibers by a sizing agent containing carbon nanomaterials. Graphene and carbon nanotubes are adopted as materials of the sizing agentfor surface modification of carbon fibers. The method includes steps of carbon fiber surface treatment, GnP-CNTs sizing agent preparation and GnP-CNTs sizing agent surface modified carbon fiber preparation. The nanomaterials including the carbon nanotubes and graphene with excellent mechanical properties and large specific surface areas are added into the sizing agent, and graphene and the carbonnanotubes are uniformly deposited on the carbon fiber surface. After surface modification, the mechanical properties of the carbon fibers are evidently improved after surface modification, and aftersizing time reaches 30s, monofilament tensile strength of CF subjected to surface modification is improved by 20.7% as compared with that of desized CF, so that problems of poor interfacial fracture toughness and low interfacial strength of a carbon fiber reinforced composite material can be solved.

Description

technical field [0001] The invention relates to a method for modifying the surface of carbon fibers with a sizing agent containing carbon nanomaterials, and specifically belongs to the technical field of surface modification of composite materials. [0002] technical background [0003] Carbon fiber is known as the "king of new materials". It is a high-performance fiber with higher strength than steel and lower density than aluminum. It is widely used in many fields such as aviation, aerospace and national defense industries. However, due to the low surface energy of carbon fiber The poor wettability of the resin leads to the decline of the interface performance, which restricts the excellent performance of the carbon fiber, so the surface treatment of the carbon fiber is required. Due to the unique electrical, optical, mechanical and thermal properties of graphene, based on the functional and structural types of graphene, nanocomposites have become an important part of many ...

Claims

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Application Information

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IPC IPC(8): D06M11/74D06M15/55D06M101/40
CPCD06M11/74D06M15/55D06M2101/40D06M2200/40
Inventor 陈飞燕秦文贞钟竹瑞肖胜蓝邱什胡锦亮牛敬祥
Owner NANCHANG HANGKONG UNIVERSITY
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