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Method for preparing self-emulsifying carbon fiber sizing agent component

A self-emulsifying, carbon fiber technology, applied in the direction of carbon fiber, can solve the problems of poor compatibility between emulsifiers and resins, demulsification, and poor compatibility between emulsifiers and epoxy resins, and achieve good sizing effect and compatibility. The effect of good performance and easy reaction process

Inactive Publication Date: 2011-12-21
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the poor compatibility of the emulsifier and the resin, when the storage time is long, demulsification often occurs due to the poor compatibility of the emulsifier and the epoxy resin.
The emulsion made with the existing commercial emulsifier is placed in the environment of 50 ℃, and the demulsification phenomenon will occur within a week

Method used

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  • Method for preparing self-emulsifying carbon fiber sizing agent component

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Preparation of self-emulsifying carbon fiber sizing components.

[0026] In the first step, the epoxy resin E-51 is grafted and modified by emulsion polymerization, and ester groups are introduced into the side chain of the epoxy resin;

[0027] In the second step, the ester group on the side chain is hydrolyzed to obtain a hydroxyl group, and the modified epoxy resin emulsifier with the hydroxyl group and the bisphenol A epoxy resin are prepared through a phase inversion process to prepare a modified epoxy resin emulsion.

[0028] The raw materials used in the emulsion polymerization method are as follows: the epoxy resin adopts epoxy resin E-51, and the emulsifier used in the first step emulsion polymerization adopts polyoxyethylene nonylphenol ether (OP-10), polyoxyethylene dehydrated The composite of sorbitan monooleate (T-80) and sodium dodecylbenzenesulfonate (DBS), the initiator is ammonium persulfate, and the modifier is vinyl acetate.

[0029] Afte...

Embodiment 2

[0053] Select vinyl acetate and epoxy resin E-51 according to the mass ratio of 1:1.5, after the amount of vinyl acetate and epoxy resin E-51 is determined, other components account for the sum of the amount of vinyl acetate and epoxy resin E-51 The weight percent (Wt%) of is:

[0054] Polyoxyethylene nonylphenol ether (OP-10) 6%

[0055] Polyoxyethylene sorbitan monooleate (T-80) 1%

[0056] Sodium dodecylbenzenesulfonate (DBS) 0.5%

[0057] Ammonium persulfate 2%

[0058] Distilled water 60%

[0059] The preparation method is the same as in Example 1, and the solid content of this example is 30%. The prepared sizing agent component is subjected to a performance test, and the results are as follows:

[0060] 1. Increase the stable pH range of the modified epoxy after the second step: 1-14, and the stable pH range of the modified epoxy emulsion after the first step is 4-12;

[0061] 2. Increase the storage period of the modified epoxy emulsion at room temperature after th...

Embodiment 3

[0069] Select vinyl acetate and bisphenol A epoxy resin according to the mass ratio of 1:1. After the amount of vinyl acetate and bisphenol A epoxy resin is determined, other components account for the proportion of vinyl acetate and bisphenol A epoxy resin. The weight percent (Wt%) of consumption sum is:

[0070] Polyoxyethylene nonylphenol ether (OP-10) 4%

[0071] Polyoxyethylene sorbitan monooleate (T-80) 3%

[0072] Sodium dodecylbenzenesulfonate (DBS) 1%

[0073] Ammonium persulfate 0.5%

[0074] Distilled water 50%

[0075] The preparation method is the same as in Example 1, and the solid content of this example is 50%. The prepared sizing agent component is subjected to a performance test, and the results are as follows:

[0076] 1. Increase the stable pH range of the modified epoxy after the second step: 1-14, and the stable pH range of the modified epoxy emulsion after the first step is 6-12;

[0077] 2. Increase the storage period of the modified epoxy emulsion...

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Abstract

The invention discloses a method for preparing a self-emulsifying carbon fiber sizing agent component, which comprises the following steps of: performing graft polymerization reaction on epoxy resin by adopting an emulsion polymerization method to prepare modified epoxy emulsion; and standing the modified epoxy emulsion at 80 DEG C for two hours, adding dropwise ammonia water into the solution after demulsification to make the solution alkaline, standing the solution at 95 DEG C in a sealing way, stirring and hydrolyzing the solution for 3 hours, taking the solution out, acidifying and neutralizing the redundant ammonia water, drying and rinsing the solution to produce modified bisphenol A epoxy resin, placing the synthesis product in the step and the bisphenol A epoxy resin into a container according to a certain weight ratio, and performing phase-inversion emulsification on the mixture at 70 DEG C to prepare a modified epoxy emulsion sizing agent component with certain solid content. The prepared carbon fiber sizing agent component has the characteristics of storage time longer than 12 months, high high-temperature stability, and high dilution stability, so that the method has huge breakthrough compared with the prior art. Carbon fibers sized by the sizing agent have high machining performance and improved inter-layer shear strength.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and relates to a product containing a high molecular polymer and a preparation method thereof, in particular to a preparation method of a self-emulsifying carbon fiber sizing agent component. Background technique [0002] The carbon fiber sizing agent component prepared in the prior art is usually made of epoxy resin as the main body, and is made by adding a certain amount of emulsifier and auxiliary agent. When used as a component of the sizing agent, it generally does not leave resin on the guide roller, and compared with the solution type sizing agent, it does not pollute the environment due to the use of solvents. Prior art adopts bisphenol A epoxy resin, polyoxyethylene nonylphenol ether (OP-10) and polyoxyethylene sorbitan monooleate (T-80) composite emulsifier, using modifier Acrylic and vinyl acetate to make water-based emulsion carbon fiber sizing. Due to the poor compatibility ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/55C08F283/10C08F2/24C08F8/12D06M101/40
Inventor 肇研段跃新刘千丁东罗云烽汤冰洁董安琪
Owner BEIHANG UNIV
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