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Hand lay-up epoxy resin composite material for wind power blade

A technology of epoxy resin and wind turbine blades, which is applied in the field of advanced composite materials, can solve problems such as temperature changes, hand lay-up anti-sagging and fiber wettability, curing speed and production efficiency, and temperature changes can not be taken into account at the same time, to achieve improvement Good heat resistance, wettability improvement, crosslink density, and anti-sag performance

Pending Publication Date: 2022-01-21
广东华彩复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the specific construction process, the anti-sagging and fiber wettability of hand-laid resin composite materials, temperature changes, crystallization and construction convenience in low-temperature environments, curing speed, production efficiency, and temperature changes cannot be taken into account at the same time. defect

Method used

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  • Hand lay-up epoxy resin composite material for wind power blade
  • Hand lay-up epoxy resin composite material for wind power blade
  • Hand lay-up epoxy resin composite material for wind power blade

Examples

Experimental program
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Effect test

preparation example 1

[0036] This preparation example adopts the following method to prepare silanized cardanol modified epoxy resin I, comprising the following steps:

[0037](1) Take cardanol and epichlorohydrin according to the weight ratio of 1:5, add quaternary ammonium salt catalyst benzyltriethylammonium chloride, the consumption is 1% of the quality of cardanol, feed dry nitrogen, and heat up to 110 ℃ for 5 hours; after the reaction, lower the temperature to 60 ℃, add solid alkali sodium hydroxide in batches, the amount is 0.4 times the mass of cardanol, and continue the reaction for 3 hours. , remove excess epichlorohydrin, obtain cardanol glycidyl ether;

[0038] (2) Take by weighing the cardanol glycidyl ether and triethoxysilane prepared in step (1) according to the ratio of 1:0.9 by weight, after mixing evenly, add 1.5 times the xylene of the cardanol glycidyl ether quality, And Castel catalyst, the dosage is 0.008% of the mass of cardanol glycidyl ether, heated up to 120°C for 4 hour...

preparation example 2

[0043] This preparation example adopts the following method to prepare silanized cardanol modified epoxy resin II, comprising the following steps:

[0044] (1) Weigh cardanol and epichlorohydrin according to the weight ratio of 1:3, add quaternary ammonium salt catalyst tetrabutylammonium bromide, the dosage is 0.7% of the mass of cardanol, feed dry nitrogen, and heat up to 120°C for reaction 3h; after the reaction, lower the temperature to 65°C, add solid alkali potassium hydroxide in batches, the dosage is 0.5 times the mass of cardanol, and continue the reaction for 4h. Excessive epichlorohydrin, obtains cardanol glycidyl ether;

[0045] (2) Take the cardanol glycidyl ether and triethoxysilane prepared by step (1) according to the ratio of 1:1.1 by weight, after mixing evenly, add 1.5 times the xylene of the cardanol glycidyl ether quality, As well as Castel catalyst, the dosage is 0.006% of the mass of cardanol glycidyl ether, and the temperature is raised to 110°C for 6 ...

Embodiment 1

[0047] A kind of hand lay-up epoxy resin composite material for wind power blades, comprising A component and B component, the weight ratio of said A component and B component is 100:20;

[0048] The A component includes the following raw materials by weight: 100 parts of bisphenol A type epoxy resin, 30 parts of silanized cardanol modified epoxy resin I, 8 parts of bisphenolic acid epoxy resin, 25 parts of reactive diluent, 2 parts of silane coupling agent, 1 part of anti-sag additive, 3 parts of filler; 40 parts of solvent;

[0049] The B component includes the following raw materials in parts by weight: 30 parts of curing agent, 5 parts of curing accelerator, 5 parts of vinyl ether compound, 1 part of defoamer, and 5 parts of solvent.

[0050] Described bisphenol A type epoxy resin has the epoxy equivalent of 320g / eq, and viscosity is 6500cps; Described bisphenol acid epoxy resin has the structure of formula (II): And an epoxy equivalent of 220g / eq.

[0051] The reactive...

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Abstract

The invention discloses a hand lay-up epoxy resin composite material for a wind turbine blade, common bisphenol A type epoxy resin is used as a main material, silanized cardanol modified epoxy resin and diphenolic acid epoxy resin are compounded, and the wettability of the hand lay-up epoxy resin composite material to fibers and the curing speed are improved; and meanwhile, by reasonably adding corresponding reactive diluents and auxiliaries, the hand lay-up epoxy resin composite material can meet the application requirements of wind power blade hand lay-up repair, and has the advantages of proper construction viscosity, good antisagging performance, low operation environment requirements, good fiber wettability and low shrinkage curing rate, and good toughness, mechanical properties, heat resistance, wear resistance and the like are achieved after curing.

Description

technical field [0001] The invention belongs to the technical field of advanced composite materials, and in particular relates to a hand-pasted epoxy resin composite material for wind power blades. Background technique [0002] Wind turbine blades are an important part of wind turbines. They are mainly made of fiber-reinforced epoxy resin composite materials through vacuum infusion molding. Due to the huge shape and complex layering of fan blades, various defects and damages often occur, which not only affect Production safety, but also cause economic losses. For this reason, it is necessary to carry out bonding and reinforcement after the components are formed, and the reinforcement usually adopts the hand lay-up process. [0003] The hand lay-up process is to use hand lay-up epoxy resin composite material to impregnate the fiber braiding layer, lay it in layers, apply pressure and bond it, and then cure it by heating. However, in the specific construction process, the an...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08K3/22C08K3/26C08K3/36
CPCC08L63/00C08K2201/011C08K2003/2227C08K2003/2241C08K2003/265C08L2201/08C08K3/22C08K3/26C08K3/36Y02E10/72
Inventor 李刚林文丹黄必文郑斯祥邓辉尧邱诗砚
Owner 广东华彩复合材料有限公司
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