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A kind of preparation method of nonionic epoxy type carbon fiber sizing agent

An epoxy-type, carbon fiber technology, applied in the field of fiber manufacturing, can solve the problems of uneven sizing on the surface of carbon fiber, affecting the use range of carbon fiber, and easy adhesion on guide rollers, etc., to achieve good clustering, narrow particle size distribution, and stability good sex effect

Active Publication Date: 2021-05-28
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solvent-based sizing agents are less stable when used online due to their low boiling point and volatility, and the main sizing agent (resin) is easy to adhere to the guide roller, resulting in uneven sizing on the surface of carbon fibers; emulsion-type sizing agents are divided into There are two types of ionic and non-ionic. Ionic sizing agents inevitably introduce alkali metal ions such as sodium and potassium on the surface of carbon fibers. They are oxidation catalysts for carbon elements and affect the scope of use of carbon fibers; non-ionic sizing agents do not have solvent-based And the above defects of ionic sizing agent, so non-ionic emulsion sizing agent will become the first choice important additive for carbon fiber manufacturing industry

Method used

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  • A kind of preparation method of nonionic epoxy type carbon fiber sizing agent

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Experimental program
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Effect test

Embodiment 1

[0022] At room temperature, add 2000g of polyethylene glycol PEG-1000 and 1500g of methyl ethyl ketone in sequence to a four-necked reaction flask equipped with a stirrer, reflux condenser, thermometer and dropping funnel, raise the temperature in the water bath to 45°C, and fully stir until The material was completely dissolved in butanone, and 120g of toluene diisocyanate TDI-100 was added dropwise at a rate of 5ml / min. After reacting for 1.5 hours, 130g of epoxy resin E-55 was added, and after continuing to react for 1 hour, the temperature of the water bath was raised to 85°C. Add 300g of capping agent octylphenol polyoxyethylene ether OP-10 and 100g of epoxy resin E-55, after 0.5 hours, the temperature of the water bath drops to 55°C, and add 60g of toluene diisocyanate TDI-100 dropwise at a speed of 4ml / min. After reacting for 2 hours, transfer the material to a closed container with a vacuum device, raise the temperature to 95°C, turn on the vacuum pump, and distill the ...

Embodiment 2

[0026] At room temperature, add 2000g of polyethylene glycol PEG-4000 and 1800g of methyl ethyl ketone in sequence to a four-necked reaction flask equipped with a stirrer, reflux condenser, thermometer and dropping funnel, raise the temperature in the water bath to 50°C, and fully stir until The material is completely dissolved in methyl ethyl ketone, and 100g of toluene diisocyanate TDI-80 is added dropwise at a rate of 5ml / min. After reacting for 1 hour, 120g of bisphenol F epoxy resin NPEF-170 is added, and after continuing to react for 1 hour, the temperature of the water bath is raised. To 80°C, add 320g end-capping agent nonylphenol polyoxyethylene ether TX-12 and 100g bisphenol F-type epoxy resin NPEF-170, after 0.5 hours, the temperature of the water bath drops to 50°C, and add dropwise at a speed of 4ml / min 50g of toluene diisocyanate TDI-80, after reacting for 2 hours, transfer the material to a closed container with a vacuum device, raise the temperature to 95°C, tur...

Embodiment 3

[0030] At room temperature, add 1800g of polyethylene glycol PEG-6000 and 1800g of butanone in sequence to a four-necked reaction flask equipped with a stirrer, reflux condenser, thermometer and dropping funnel, raise the temperature in the water bath to 50°C, and fully stir until The material was completely dissolved in butanone, and 90g of toluene diisocyanate TDI-80 was added dropwise at a rate of 5ml / min. After reacting for 1 hour, 130g of epoxy resin E-55 was added, and after continuing to react for 1 hour, the water bath was heated to 85°C. Add 300g end-capping agent tristyrylphenol polyoxyethylene polyoxypropylene ether and 90g epoxy resin E-55, after 0.5 hours, the water bath temperature drops to 50°C, and add 45g toluene diisocyanate TDI- 80. After reacting for 1.5 hours, transfer the material to a closed container with a vacuum device, raise the temperature to 90°C, turn on the vacuum pump, and distill the butanone in the material under reduced pressure for 3 hours un...

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Abstract

The invention provides a preparation method of a nonionic water-based epoxy carbon fiber sizing agent, which belongs to the field of fiber manufacturing. Comprise the following steps: 1. use polyethylene glycol, methyl ethyl ketone to mix, epoxy resin, blocking agent, diisocyanate monomer to make golden yellow nonionic emulsifier; 2. the nonionic emulsifier prepared in step 1 and Epoxy resin is melted and stirred at 50-75°C, mixed evenly, and inversely emulsified to become a water-based emulsion; 3. Reduce the stirring speed, continue to add deionized water at room temperature dropwise, adjust the solid content of the emulsion, pass through a 200-mesh filter, and prepare A non-ionic epoxy carbon fiber sizing agent was obtained. The carbon fiber sizing agent prepared by the method provided by the invention has good stability, small emulsion particles, and narrow particle size distribution, which can endow carbon fibers with good bundling properties, wear resistance, wettability, and compatibility with epoxy matrix resins Good performance, excellent comprehensive mechanical properties of carbon fiber composites.

Description

technical field [0001] The invention belongs to the field of fiber manufacturing, in particular to a preparation method of a nonionic epoxy carbon fiber sizing agent. Background technique [0002] Carbon fiber has excellent properties such as high strength and modulus, high temperature resistance, corrosion resistance, fatigue resistance, creep resistance, high electrical and thermal conductivity, and low thermal expansion coefficient. It has developed into an important reinforcing fiber material at home and abroad, especially carbon fiber reinforced resin. At present, the application of matrix composite materials in aerospace, aviation, weaponry, industrial equipment manufacturing, medical equipment, sporting goods and other fields has shown a rapid growth trend. [0003] The performance of carbon fiber directly determines the performance of composite products. Carbon fibers have low elongation and are brittle, and are prone to fluffing, wire splitting and broken wires dur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/55D06M15/568D06M101/40
CPCD06M15/55D06M15/568D06M2101/40D06M2200/40
Inventor 王国军魏浩欧阳肖李瑞高闪张智嘉马宁张馨月舒立伟王强
Owner HARBIN ENG UNIV