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Water-based-epoxy sizing agent and preparing method thereof

A water-based epoxy and sizing agent technology, applied in textiles and papermaking, carbon fiber, fiber processing, etc., can solve the problems of poor emulsification effect, high viscosity and difficult dispersion, achieve good bundling and fiber opening, and overcome the solvent problem. Effect

Active Publication Date: 2019-06-11
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional emulsifiers are mostly linear small molecules, one end is lipophilic and the other end is hydrophilic, but for epoxy resin, the hydrophobicity is too strong, the viscosity is high and it is difficult to disperse, so the traditional emulsifier has a very good emulsifying effect on epoxy resin. Difference

Method used

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  • Water-based-epoxy sizing agent and preparing method thereof
  • Water-based-epoxy sizing agent and preparing method thereof
  • Water-based-epoxy sizing agent and preparing method thereof

Examples

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Effect test

Embodiment 1

[0035] In this embodiment, the water-based epoxy sizing agent consists of 100g epoxy resin E51, 10g hyperbranched emulsifier, 1g alkyl polyoxyethylene ether EL20, 1g hydroxyethyl cellulose and 100g deionized water.

[0036] Wherein, the hyperbranched emulsifier is prepared through the following steps:

[0037] 1) Raw material preparation: raw materials were prepared according to the following components: 100 g of polyethylene glycol 1000, 10 parts by weight of dimethylol propionic acid, 30 g of trimethylolpropane triglycidyl ether and 2 g of ammonium persulfate;

[0038] 2) Add the long-chain polyol, multifunctional modifier, epoxy compound and catalyst prepared in step 1) into the reaction kettle, and heat up to 100°C for 4 hours under stirring;

[0039] 3) After the reaction in step 2) is completed, cool to normal temperature and discharge to obtain the hyperbranched emulsifier.

Embodiment 2

[0041] The difference between the water-based epoxy sizing agent in this example and the water-based epoxy sizing agent in Example 1 is that the amount of ammonium persulfate used to prepare the hyperbranched emulsifier used in the water-based epoxy sizing agent in this example is 4g.

Embodiment 3

[0043]The difference between the water-based epoxy sizing agent in this example and the water-based epoxy sizing agent in Example 1 is that the amount of ammonium persulfate used to prepare the hyperbranched emulsifier used in the water-based epoxy sizing agent in this example is 5 g.

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Abstract

The invention discloses a water-based-epoxy sizing agent and a preparing method thereof. The water-based-epoxy sizing agent is prepared from, by weight, 100 parts of epoxy resin, 10-30 parts of a hyperbranched emulsifying agent, 1-5 parts of an auxiliary emulsifying agent, 1-5 parts of a dispersing agent and 100-300 parts of deionized water. A hyperbranched structure of a modified epoxy emulsifying agent has a large quantity of holes, the holes are added into the epoxy resin, the viscosity of a system can be reduced, and the grain size of emulsion can be decreased in the phase transformation process to improve wetting of the sizing agent to the surface of a carbon fiber. According to the water-based-epoxy sizing agent and the preparing method thereof, the solvent problem caused by the large viscosity in a traditional emulsification epoxy process is solved, the grain size of the sizing agent prepared with the method is 200 nm or below, the sizing agent can be evenly spread on the surface of the carbon fiber, and the carbon simultaneously has good bundling and splitting properties accordingly. The interlaminar shear strength of an epoxy composite material prepared from the carbon fiber sized through the sizing agent can be 70 MPa or above.

Description

technical field [0001] The invention relates to the technical field of sizing agents, in particular to a water-based epoxy sizing agent which can be used for carbon fiber sizing in the carbon fiber spinning process and a preparation method thereof. Background technique [0002] Carbon fiber and its composite materials have many excellent properties and have been widely used in military and civilian fields. However, carbon fiber has a certain degree of brittleness, and it is easy to produce monofilament breakage and fluff during the production process. At the same time, due to high-temperature carbonization, it has few surface active groups, low polarity, and poor bonding with epoxy resin. It is necessary to carry out surface treatment on carbon fiber to improve its clustering and interfacial bonding force with epoxy resin, and improve the physical and mechanical properties of composite materials. At present, the surface treatment of carbon fiber mainly uses sizing agent for...

Claims

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Application Information

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IPC IPC(8): D06M15/55D06M101/40
Inventor 叶俊李效玉贾晓龙邱藤
Owner BEIJING UNIV OF CHEM TECH
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