Preparation method of dopamine modified glass fiber/unsaturated polyester composite material

A polyester composite material and glass fiber technology, which is applied in the field of dopamine-modified glass fiber/unsaturated polyester composite material preparation, can solve the problems of high cost, cumbersome treatment process, fiber damage interface bonding force, etc., and achieves comprehensive performance improvement. , The polymerization conditions are simple, and the effect of improving the interface bonding force

Inactive Publication Date: 2019-08-06
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have improved the interfacial properties of composite materials to a certain extent, but in addition to sizing and coating methods, these methods often have cumbersome processing techniques, high costs, easy damage to fibers, and weak interfacial bonding. shortcoming

Method used

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  • Preparation method of dopamine modified glass fiber/unsaturated polyester composite material
  • Preparation method of dopamine modified glass fiber/unsaturated polyester composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take 10 pieces of 04 platinum glass fibers (20cm*30cm each), soak them in acetone for 4 hours, then wash them with deionized water and dry them with air at 60°C, then take them out for use. After weighing 191# unsaturated polyester resin, cyclohexanone peroxide and cobalt epoxy acid according to the ratio of 100:2:1, stir evenly, coat on a glass plate covered with release cloth, and spread a Layer glass fiber, and then brush a layer of resin solution, until all 10 pieces of glass fiber cloth are covered. After curing at room temperature for 4 hours, an unmodified glass fiber composite board was obtained.

Embodiment 2

[0020] Take 10 pieces of 04 platinum glass fibers (20cm*30cm each), soak them in acetone for 4 hours, then clean them with deionized water and dry them with air at 60°C, then take them out for use. Prepare a 2.0 g / L dopamine hydrochloric acid solution, soak the desized glass fiber in the dopamine hydrochloric acid solution for 2 hours, take it out, wash it once with deionized water, and dry it in an oven at 60°C for later use. After weighing 191# unsaturated polyester resin, cyclohexanone peroxide and cobalt epoxy acid according to the ratio of 100:2:1, stir evenly, coat on a glass plate covered with release cloth, and spread a Layer glass fiber, and then brush a layer of resin solution, until all 10 pieces of glass fiber cloth are covered. Curing at room temperature for 4 hours to obtain a glass fiber composite board with a dopamine modification time of 2 hours.

Embodiment 3

[0022] Take 10 pieces of 04 platinum glass fibers (20cm*30cm each), soak them in acetone for 4 hours, then clean them with deionized water and dry them with air at 60°C, then take them out for use. Prepare a 2.0g / L dopamine hydrochloric acid solution, soak the desized glass fiber in the dopamine hydrochloric acid solution for 6 hours, take it out, wash it once with deionized water, and dry it in an oven at 60°C for later use. After weighing 191# unsaturated polyester resin, cyclohexanone peroxide and cobalt epoxy acid according to the ratio of 100:2:1, stir evenly, coat on a glass plate covered with release cloth, and spread a Layer glass fiber, and then brush a layer of resin solution, until all 10 pieces of glass fiber cloth are covered. Curing at room temperature for 4 hours to obtain a glass fiber composite board with a modification time of 6 hours.

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Abstract

The invention relate to a preparation method of a dopamine modified glass fiber/unsaturated polyester composite material. Acetone is adopted to carry out desizing treatment on a glass fiber raw material, desized glass fiber is put into a dopamine hydrochloric acid solution for soaking, then the glass fiber is taken out and cleaned by deionized water, and dried to obtain modified glass fiber, and the modified glass fiber and unsaturated resin are mixed to prepare the dopamine modified glass fiber reinforced resin composite material. According to the preparation method, the glass fiber is modified by dopamine, the interface structure between the glass fiber and the resin on a microscopic scale is designed, adjusted and controlled, the wettability and the interface bonding strength between the glass fiber and the resin are increased, and the comprehensive performance of the modified glass fiber unsaturated polyester composite material is obviously improved. However, dopamine polymerization conditions are simple, and the environment is relatively mild. The thickness of the dopamine deposited on the surface of the glass fiber is controllable. Therefore, the preparation method is more conducive to the industrial production and wider application of the glass fiber composite material.

Description

technical field [0001] The invention relates to a method for preparing a dopamine-modified glass fiber / unsaturated polyester composite material, and specifically belongs to the technical field of glass fiber surface modification. Background technique [0002] Glass fiber is an inorganic non-metallic material with excellent performance. It has a series of excellent properties such as good insulation, strong heat resistance, good corrosion resistance, and high mechanical strength. Therefore, its composite materials are widely used in construction, chemical and chemical industries. , transportation and electronics industries. Unsaturated polyester has excellent process performance, can be cured at room temperature, molded under normal pressure, process performance is flexible, especially suitable for the preparation of large-scale and on-site glass fiber / unsaturated polyester composite materials, and unsaturated polyester after curing Comprehensive performance is good. Howeve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/06C08K9/04C08K7/14C08G73/06
CPCC08G73/0672C08K7/14C08K9/04C08K9/08C08L67/06
Inventor 秦文贞陈方友孟江燕洪珍
Owner NANCHANG HANGKONG UNIVERSITY
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