Fiber-reinforced foamed epoxy resin composite material and preparation method thereof

An epoxy resin and fiber-reinforced technology, applied in coatings and other directions, can solve problems such as small deformation shrinkage, car door breakage, and low safety factor, and achieve the effects of improving toughness and strength, increasing strength, and improving compactness

Inactive Publication Date: 2018-10-16
ANHUI HAOSEN NEW MATERIAL TECH CO LTD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0004] The epoxy resin cured by epoxy resin has good physical and chemical properties. It has small deformation shrinkage rate on the surface of metal and non-metal materials, good dimensional stability of products, high hardness and good flexibility. Part of the solvent is stable, but the strength of the epoxy resin is not enough to support the strain force generated by the car at high speed. When the car is running at high speed, especially when a collision occurs, the door is easily broken, the safety factor is low, and the current Poor sound insulation effect of epoxy resin in existing technologies

Method used

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  • Fiber-reinforced foamed epoxy resin composite material and preparation method thereof

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[0032]Simultaneously, the present invention also provides a kind of preparation method according to the fiber-reinforced foamed epoxy resin composite material of the present invention, comprises the following steps:

[0033] (1) Mix epoxy resin, surfactant, foaming agent, reinforcing fiber, amino-modified silica with a particle size of 100-300 nanometers and the first part of chain extender in an organic solvent, and then React at 80°C for 30-180 minutes to obtain a composite emulsion;

[0034] (2) Add amino-modified silica with a particle size of 50-100 nanometers and the second part of the chain extender to the composite emulsion, and then react at 60-90°C for 60-120 minutes, then add a curing agent, and mix evenly. get the pre-product;

[0035] (3) Heat treatment of the pre-product: treat the pre-product at a pressure of 100-300 MPa and a temperature of 130-200° C. for 5-25 minutes, and then cool to room temperature to obtain a fiber-reinforced foamed epoxy resin composite...

Embodiment 1

[0056] (1) Preparation of amino-modified silica:

[0057] Preparation of amino-modified silica A: Mix 50g of tetraethylorthosilicate in 500mL of sodium hydroxide aqueous solution with a pH of 8, then let it stand at 30°C for 120min, and centrifugally wash to obtain nano-silica. Said nano-silica and silane coupling agent KH550 were uniformly mixed in toluene, and then refluxed at 100°C for 8 hours to obtain amino-modified silica with a particle size of 50 nm and a surface amino content of 0.45 mmol / g;

[0058] Preparation of amino-modified silica B: Mix 50g of tetraethylorthosilicate in 500mL of sodium hydroxide aqueous solution with a pH of 9.5, then let it stand at 30°C for 120min, and wash by centrifugation to obtain a particle size of 50nm Mix the nano-silica and silane coupling agent KH550 in toluene evenly, and then reflux at 85°C for 8 hours to obtain an amino-modified compound with a particle size of 200 nm and a surface amino content of 0.8 mmol / g. Silica;

[0059] (...

Embodiment 2

[0064] (1) Preparation of amino-modified silica:

[0065] Preparation of amino-modified silica A: Mix 38g of tetraethylorthosilicate in 500mL of sodium hydroxide aqueous solution with a pH of 8, then let it stand at 30°C for 120min, and centrifugally wash to obtain nano-silica. Said nano-silica and silane coupling agent KH550 were uniformly mixed in toluene, and then refluxed at 90°C for 8 hours to obtain amino-modified silica with a particle size of 50 nm and a surface amino content of 0.41 mmol / g;

[0066] Preparation of amino-modified silica B: Mix 55g of tetraethylorthosilicate in 800mL of sodium hydroxide aqueous solution with a pH of 10.3, then let it stand at 30°C for 120min, and wash it by centrifugation to obtain silica with a particle size of 50nm. Silica, mix the nano-silica and silane coupling agent KH550 in toluene evenly, and then reflux at 100°C for 6h to obtain an amino-modified compound with a particle size of 250 nanometers and a surface amino content of 0.6m...

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Abstract

The invention relates to the field of epoxy resin, in particular to a fiber-reinforced foamed epoxy resin composite material and a preparation method thereof. The preparation method includes the stepsof firstly, evenly mixing epoxy resin, surfactant, a foaming agent, reinforcing fibers, amino modified silicon dioxide with the particle size being 100-300 nanometers and first part of chain extenderin an organic solvent, and performing reaction under 50-80 DEG C for 30-180 minutes to obtain a composite emulsion; secondly, adding amino modified silicon dioxide with the particle size being 50-100nanometers and second part of chain extender into the composite emulsion, and performing reaction under 60-90 DEG C for 60-120 minutes, and adding a curing agent to obtain a preliminary product; thirdly, performing heat treatment on the preliminary product to obtain the fiber-reinforced foamed epoxy resin composite material. The fiber-reinforced foamed epoxy resin composite material prepared by the method is lightweight, high in strength, good in sound insulation effect and promising in application prospect in car body materials.

Description

technical field [0001] The invention relates to the technical field of epoxy resin, in particular to a fiber-reinforced foamed epoxy resin composite material and a preparation method thereof. Background technique [0002] In recent years, automobile lightweight has become the key direction of the development of the current automobile field. Lightweight technology can not only effectively solve the problem of environmental pollution, achieve the goal of energy saving and emission reduction, but also greatly reduce the cost of automobile manufacturing. It has great economic benefits compared with the cars currently in use. [0003] At present, the methods of reducing the weight of automobiles mainly include the use of lightweight materials and the reduction of the cross-section of door panels. Reducing the cross-section of the door panel means reducing the thickness of the door panel. Although it can reduce the overall weight of the car, it will also lead to a decrease in the...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08K7/08C08K7/04C08K9/06C08K3/36C08J9/10C08J5/04C08J7/04
CPCC08J9/103C08J9/105C08J2203/04C08J2363/00C08J2463/00C08K3/36C08K7/04C08K7/08C08K9/06C08J7/0427C08J5/0405
Inventor 翟彬
Owner ANHUI HAOSEN NEW MATERIAL TECH CO LTD
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