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Sizing carbon fiber cloth reinforced flame-retardant epoxy resin and preparation method thereof

A technology of epoxy resin and carbon fiber cloth, which is applied in the field of polymer materials and can solve problems such as poor compatibility, easy moisture absorption, and high cost

Active Publication Date: 2021-09-24
NORTHEAST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the common IFRs are mostly compound flame retardants, which are often poorly compatible with the matrix and easy to absorb moisture, and the carbon source as the main component generally comes from carbon-rich polyols produced by petroleum cracking. High cost and does not meet environmental protection requirements

Method used

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  • Sizing carbon fiber cloth reinforced flame-retardant epoxy resin and preparation method thereof
  • Sizing carbon fiber cloth reinforced flame-retardant epoxy resin and preparation method thereof
  • Sizing carbon fiber cloth reinforced flame-retardant epoxy resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation method of sizing agent reinforced carbon fiber cloth:

[0031] (1) Ozonation treatment of lignin: 5g of organic solvent lignin is placed in an ozonation device, and treated for 1.5h at a mixed gas flow rate of 450L / h and an ozone concentration of 13mg / L to obtain ozonated organic solvent lignin ;

[0032](2) After dissolving the organic solvent lignin and 8.5g bisphenol A type epoxy resin obtained by the ozonation treatment of 1.5g step (1) in N,N-dimethylformamide (DMF), stir at room temperature for 15 Minutes, then be warming up to 95 ℃ and stir to obtain lignin-based epoxy resin after 1.5 hours;

[0033] (3) Add absolute ethanol to the lignin-based epoxy resin obtained in step (2), then add 3g of diethanolamine, stir at 75°C for 2h, and stir at a speed of 400rpm to obtain a lignin-based ring grafted with diethanolamine oxygen resin;

[0034] (4) Add 1.75g ​​of acetic acid solution to the lignin-based epoxy resin grafted with diethanolamine obtained in ...

Embodiment 2

[0037] Preparation method of lignin-based intumescent flame retardant:

[0038] (1) Weigh 12.93g of enzymatic lignin (Lignin) and dissolve it in 20mL N,N-dimethylformamide (DMF), then add 12.60g of melamine (MEL) and mix well, heat to 80-100°C, and react 3 to 5 hours to obtain the intermediate product LM;

[0039] (2) Then add 29.90g of aminotrimethylene phosphonic acid (ATMP) to the intermediate product LM obtained in step (1), react at 80-100°C for 10-15 hours, ethanol elute to obtain the product lignin-based expansion type Flame retardant (LMA).

[0040] (3) The product LMA obtained in step (2) is dried at 70-80°C for 12-14 hours and then pulverized to obtain lignin-based intumescent flame retardant LMA powder. The synthesized lignin-based intumescent flame retardant Infrared characterization as Figure 4 shown.

Embodiment 3

[0042] The preparation method of the sizing carbon fiber cloth reinforced flame retardant epoxy resin with a flame retardant content of 10wt%:

[0043] (1) 12g of the lignin-based intumescent flame retardant (LMA) powder obtained in step (3) of Example 2 was dissolved in 8g of N,N-dimethylformamide (DMF);

[0044] (2) 108g bisphenol A type epoxy resin is joined in the fire retardant that step (1) dissolves and continues reaction 40min at 60 ℃ and prepares the flame retardant epoxy resin that flame retardant content is 10wt%;

[0045] (3) Using a vacuum-assisted molding process, the carbon fiber after the sizing pretreatment in step (5) of Example 1 is arranged in a vacuum-assisted molding device, and a vacuum operation is performed, and the curing agent diethylenetriamine is mixed with the step (2) by negative pressure. ) The flame retardant epoxy resin obtained is mixed evenly according to the mass ratio of 9.2:100, then injected into the vacuum assisted molding device, pumpe...

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Abstract

The invention provides sizing carbon fiber cloth reinforced flame-retardant epoxy resin and a preparation method thereof. The preparation method comprises the following steps: reacting lignin, melamine and amino trimethylene phosphonic acid to obtain a lignin-based intumescent flame retardant; reacting the flame retardant with epoxy resin to prepare flame-retardant epoxy resin; reacting epoxy resin with ozonized lignin to obtain lignin-based epoxy resin, adding alcohol amine, carboxylic acid and a silane coupling agent to obtain a sizing agent, soaking carbon fiber cloth in a sizing agent aqueous solution, pulling out the carbon fiber cloth, and drying the carbon fiber cloth to obtain sized carbon fiber cloth; and obtaining the sizing carbon fiber cloth reinforced flame-retardant epoxy resin composite material by using a vacuum auxiliary forming device. According to the flame retardant and the sizing agent, the sizing carbon fiber cloth reinforced flame-retardant epoxy resin composite material has good flame retardance, bonding property and mechanical property. The flame retardant and the sizing agent synthesized from lignin are low in cost and environmentally friendly, and the prepared sizing carbon fiber cloth reinforced flame-retardant epoxy resin composite material is excellent in comprehensive performance.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a sizing carbon fiber cloth reinforced flame-retardant epoxy resin and a preparation method thereof. Background technique [0002] Epoxy resin has stable chemical properties, simple processing technology, good insulation, chemical corrosion resistance, and good solvent resistance, which makes epoxy resin widely used in composite materials. However, epoxy resin is flammable and will produce a large amount of toxic fumes during combustion. At the same time, it has poor wear resistance, impact damage resistance, and poor toughness, which limits its application in daily life. The flame retardancy of epoxy resin is mainly achieved by introducing flame retardant components, that is, additive flame retardant technology, and the added flame retardant components are called additive flame retardants. The flame retardant can be a non-reactive but flame-retardant substance, but its disadvan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/06C08L63/00C08K9/06C08K9/04C08K7/06
CPCC08J5/06C08J2363/00C08K9/06C08K9/08C08K7/06
Inventor 呼微刘昱含张晨晨刘佰军朱广山徐义全
Owner NORTHEAST NORMAL UNIVERSITY
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