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Fiber surface modification method capable of adaptively constructing interaction for base bodies with different properties and application thereof

A fiber surface, self-adaptive technology, used in carbon fiber, fiber processing, textiles and papermaking, etc., can solve problems such as drop, fiber damage performance, etc., to increase specific surface area, enhance mechanical lock and function, and enhance the effect of interface bonding

Inactive Publication Date: 2013-05-22
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the process of industrial production, the fibers have to be treated with sizing agents during the production process. Different types of sizing agents are aimed at different properties of the resin matrix. The amount of carbon fiber used in the experimental research and industrial development process is very small, and the post-treatment method is used to change. Fiber surface treatment agent, but whether it is solvent extraction or high-temperature burning, it will cause damage to the fiber and its performance will be significantly reduced, especially for fiber reinforced materials in the form of braids, the damage will be more serious after treatment

Method used

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  • Fiber surface modification method capable of adaptively constructing interaction for base bodies with different properties and application thereof
  • Fiber surface modification method capable of adaptively constructing interaction for base bodies with different properties and application thereof
  • Fiber surface modification method capable of adaptively constructing interaction for base bodies with different properties and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] 1 nm SiO 2 Synthesis of hybrid particles

[0068] 1) Synthesis of AP-SN

[0069] in N 2 Under the atmosphere, 5g of nano-SiO 2 Add to a 500ml three-necked round-bottomed flask filled with anhydrous toluene, stir to form a suspension, and when the system temperature reaches the toluene reflux temperature (110°C), add a mixed solution of 10.5ml of APTES and 10ml of anhydrous toluene dropwise, and stir to reflux After 24 hours, cool, centrifuge, wash three times with absolute ethanol, dry under vacuum at 40°C, and record it as AP-SN.

[0070]2) synthesis of macroinitiator 1 (reaction 40%-NH 2 )

[0071] in N 2 Under the atmosphere, add 4g of AP-SN and 0.2232ml of triethylamine into a three-necked round-bottomed flask filled with 250ml of anhydrous toluene respectively, ice bath and stir for 15min, until the temperature of the system drops to 0°C, dropwise Add a mixed solution of 0.1392ml bromoacetyl bromide and 10ml anhydrous toluene, react at room temperature for 1...

Embodiment 2

[0103] 1 nm SiO 2 Synthesis of hybrid particles

[0104] 1) Synthesis of AP-SN

[0105] APTES is the APTES of 15.85ml, and other is with embodiment 1.

[0106]2) Synthesis of macroinitiator 1 (reaction 40%-NH 2 )

[0107] AP-SN is 4g, triethylamine 0.311ml, bromoacetyl bromide 0.194ml, and others are the same as in Example 1.

[0108] 3) Initiate the ATRP reaction of St

[0109] The macroinitiator 1 of 4g, PMDETA0.465ml, CuBr0.319g, St5.838ml, other are the same as embodiment 1.

[0110] 4) PS-Br dehalogenation

[0111] PS-Br3g, PMDETA0.175ml, CuBr0.121g, TBH1.347ml, other with embodiment 1.

[0112] 5) Synthesis of macroinitiator 2 (reaction 60%-NH 2 )

[0113] 3 g of the dehalogenated product, 0.351 ml of triethylamine, 0.229 ml of bromoacetyl bromide, and the others are the same as in Example 1.

[0114] 6) Initiate the ATRP reaction of HEA

[0115] 3g macroinitiator 2, PMDETA0.523ml, CuBr0.358g, HEA6.589ml, others are the same as embodiment 1.

[0116] 2nm SiO ...

Embodiment 3

[0121] 1 nm SiO 2 Synthesis of hybrid particles

[0122] 1) Synthesis of AP-SN

[0123] APTES is the APTES of 26.45ml, and other is with embodiment 1.

[0124] 2) Synthesis of macroinitiator 1 (reaction 40%-NH 2 )

[0125] AP-SN is 4g, triethylamine 0.379ml, bromoacetyl bromide 0.237ml, and others are the same as in Example 1.

[0126] 3) Initiate the ATRP reaction of St

[0127] The macroinitiator 1 of 4g, PMDETA0.568ml, CuBr0.391g, St7.140ml, other are the same as embodiment 1.

[0128] 4) PS-Br dehalogenation

[0129] PS-Br3g, PMDETA0.214ml, CuBr0.148g, TBH1.647ml, other with embodiment 1.

[0130] 5) Synthesis of macroinitiator 2 (reaction 60%-NH 2 )

[0131] 3 g of the dehalogenated product, 0.428 ml of triethylamine, 0.281 ml of bromoacetyl bromide, and others are the same as in Example 1.

[0132] 6) Initiate the ATRP reaction of HEA

[0133] 3g macroinitiator 2, PMDETA0.639ml, CuBr0.439g, HEA8.058ml, others are the same as embodiment 1.

[0134] 2nm SiO 2 ...

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Abstract

The invention discloses a fiber surface modification method capable of adaptively constructing interaction for base bodies with different properties and an application thereof. Nano SiO2 hybrid particles of which the surfaces are grafted with two polymer chain segments with different properties are adopted, and active hydroxyls on the surfaces of the particles form chemical bond combination with a reinforcing material so as to play strong interaction. In the process of compounding the reinforcing material with polymer base bodies with different properties, the binary polymer chain segment grafted on the surface of nano SiO2 can form active diffusion and entanglement or conduct a chemical reaction with a base body having relatively good compatibility with the binary polymer chain segment so as to enhance the interface bonding strength; in the presence of nano SiO2, the surface roughness of fiber can be improved to a certain extent, and the mechanical locking effect with the base body is enhanced; and the nano SiO2 also can serve as a new focal point of stress to initiate microcracks so as to prevent expansion of large cracks and remarkably absorb external impact energy and crack propagation energy, a multi-dimensional reinforcing system of a fiber-nano SiO2-base body is formed, and the strength of a polymer-based composite material is improved.

Description

technical field [0001] The present invention relates to two kinds of polymer segment modified nano-silica (nano-SiO2) with different properties. 2 ), and grafted to carbon fibers to realize the self-adaptive construction of strong interaction fiber surface modification method and its application for different properties of the matrix. Background technique [0002] In fiber-reinforced polymer composites, the compatibility of reinforcing fibers with the polymer matrix is ​​poor, and it is difficult to form effective interfacial bonding. In terms of fiber surface modification, a lot of research work has been carried out: including gas phase oxidation method, liquid phase oxidation method, anodic oxidation method, coating method, electropolymerization, plasma modification, surface grafting and other methods. ( [1] A Fjeldly, T Olsen, et al. Composites Part A: Applied Science and Manufacturing. 2001.32:373-378. [2] A. Fukunaga, S. Ueda, M. Nagumo. Carbon, 1999, 37: 1081-1085.)...

Claims

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Application Information

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IPC IPC(8): D06M11/79C08F292/00C03C25/42D06M101/40
Inventor 周晓东王慧林群芳郭兵兵方立赵婧婧邓双辉蔡伦
Owner EAST CHINA UNIV OF SCI & TECH
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