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Water-soluble temperature-resistant carbon fiber sizing agent and preparation method thereof

A water-soluble, sizing technology, applied in the direction of carbon fiber, fiber treatment, fiber type, etc., can solve the problems of low temperature resistance and poor storage stability of sizing agent, and achieve good adhesion, good adhesion, and Tg temperature. high effect

Active Publication Date: 2021-07-13
KAIFENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a water-soluble temperature-resistant carbon fiber sizing agent and its preparation method for processing and preparing high-temperature-resistant composite materials with a temperature resistance above 250°C, in order to solve the problem of sizing agents in the prior art. Technical problems of low temperature resistance and poor storage stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: a kind of water-soluble polyamine-imide resin, its preparation method comprises the steps:

[0031] (1) Put diphenylmethane diisocyanate into N,N dimethylformamide at a temperature of 40°C to obtain a mixed system A;

[0032] Wherein, by mass percentage, the addition of diphenylmethane diisocyanate is N, 20% of N dimethylformamide;

[0033] (2) Put trimellitic anhydride (TMA) into the mixed system A, slowly heat to 90°C, and react for 8 hours to obtain the mixed system B;

[0034] Wherein, the molar ratio of TMA to diphenylmethane diisocyanate is 1.01:1;

[0035] (3) Add diphenyl ether diamine to the mixed system B to react for 1 hour, and then lower the temperature to 80°C to obtain the mixed system C;

[0036] Wherein, by molar percentage, the addition of diphenyl ether diamine is 5% of diphenylmethane diisocyanate;

[0037] (4) Add triethylamine to the mixed system C and react for 5 hours to obtain the mixed system D;

[0038] Wherein, by mass perce...

Embodiment 2

[0040] Embodiment 2: a kind of water-soluble polyamine-imide resin, its preparation method comprises the steps:

[0041] (1) Take toluene diisocyanate (TDI) and put it into N-methylpyrrolidone at a temperature of 30°C to obtain a mixed system A;

[0042] Wherein, by mass percentage, the addition of TDI is 25% of N-methylpyrrolidone;

[0043] (2) Put trimellitic anhydride (TMA) into the mixed system A, slowly heat to 95°C, and react for 10 hours to obtain the mixed system B;

[0044] Among them, the molar ratio of TMA to TDI is 1.06:1;

[0045] (3) Add m-phenylenediamine to the mixed system B to continue the reaction for 1.5 hours, and then lower the temperature to 75°C to obtain the mixed system C;

[0046] Wherein, by molar percentage, the addition of m-phenylenediamine is 8% of TDI;

[0047] (4) Add diethanolamine to the mixed system C and react for 3 hours to obtain the mixed system D;

[0048] Wherein, by mass percentage, the add-on of diethanolamine is 20% of TMA;

...

Embodiment 3

[0050] Embodiment 3: a kind of water-soluble polyamine-imide resin, its preparation method comprises the steps:

[0051] (1) Take diphenylmethane diisocyanate and add it to N,N dimethylacetamide at a temperature of 35°C to obtain a mixed system A;

[0052] Wherein, by mass percentage, the addition of diphenylmethane diisocyanate is N, 50% of N dimethylacetamide;

[0053] (2) Put trimellitic anhydride (TMA) into the mixed system A, slowly heat to 100°C, and react for 12 hours to obtain the mixed system B;

[0054] Wherein, the molar ratio of TMA to diphenylmethane diisocyanate is 1.1:1;

[0055] (3) Add o-phenylenediamine to the mixed system B to continue the reaction for 2 hours, and then lower the temperature to 80°C to obtain the mixed system C;

[0056] Wherein, in terms of molar percentage, the addition of o-phenylenediamine is 10% of diphenylmethane diisocyanate;

[0057] (4) Add triethanolamine to the mixed system C and react for 4 hours to obtain the mixed system D; ...

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PUM

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Abstract

The invention discloses a water-soluble temperature-resistant carbon fiber sizing agent and a preparation method thereof, aiming at solving the technical problems of low temperature resistance and poor storage stability of the sizing agent in the prior art. Take diisocyanate and add strong polar non-protonated solvent to get mixed system A; put trimellitic anhydride into mixed system A and heat slowly to get mixed system B; add diamine to mixed system B and lower the temperature to get mixed system C; Add polyamine resin water-based reagent to system C to obtain mixed system D; add deionized water to mixed system D to obtain water-soluble polyamideimide resin; take water-soluble polyamineimide resin and add it to deionized water, and then add Penetrating agent, temperature-resistant carbon fiber sizing agent. The temperature-resistant carbon fiber sizing agent of the present invention has good bonding performance, high Tg temperature, good temperature resistance, environmental protection, safety and harmlessness, can effectively improve the comprehensive performance of composite materials, improve the quality of carbon fiber, and improve the grade of carbon fiber.

Description

technical field [0001] The invention relates to the technical field of carbon fiber sizing agents, in particular to a water-soluble temperature-resistant carbon fiber sizing agent and a preparation method thereof. Background technique [0002] Carbon fiber has excellent mechanical properties and is widely used in modern aerospace, sports and leisure products, civil construction, electronic products, medical equipment and other fields. However, the elongation of carbon fiber is low and brittle. In the process of production and processing, mechanical friction, stretching and impact are prone to breakage, wool and monofilament breakage, which reduces the strength of carbon fiber. [0003] Carrying out gluing treatment on carbon fiber, that is, coating a layer of protective glue on the surface-treated carbon fiber, can not only protect the surface of carbon fiber, reduce hairiness, monofilament and monofilament breakage, make carbon fiber cluster, improve deep processing perform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/59C08G73/10D06M101/40
CPCC08G73/1003D06M15/59D06M2101/40D06M2200/40
Inventor 石海洋周永恒王宫男王迪
Owner KAIFENG UNIV