Epoxy resin composition used for fiber winding and preparation method of epoxy resin composition

Abstract

The invention relates to the field of composite materials, and concretely relates to an epoxy resin composition used for fiber winding and a preparation method of the epoxy resin composition. The epoxy resin composition comprises an epoxy resin component, a curing agent component and an additive component which are in the weight ratio of 100:(80-120):(0.1-20); the epoxy resin component comprises the following materials in percentage by weight: 5-65% of epoxy resin and 10-20% of an epoxy diluent; the curing agent component comprises the following materials in percentage by weight: 90-99% of acid anhydride curing agents and 1-10% of an accelerator; the additive component comprises the following materials in percentage by weight: 0.1-3% of a defoaming agent, 2-5% of a coupling agent, 0.1-3% of a wetting agent, and 5-20% of a flexibilizer; and the flexibilizer comprises one or a mixture of more selected from glass microspheres, liquid carboxyl-terminated butadiene acrylonitrile rubber, carboxyl-terminated butadiene acrylonitrile rubber, core-shell rubber and polyurethane rubber. According to the invention, the epoxy resin composition prepared by the method has the advantages of havingexcellent toughness and strength and excellent bonding properties with fibers.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to an epoxy resin composition for fiber winding and a preparation method thereof. Background technique [0002] In today's increasingly environmentally friendly environment, the use of fuel vehicles has caused energy depletion and urban environmental pollution, which has attracted global attention. One of the measures is to use clean energy, such as compressed natural gas (CNG) or hydrogen. These clean energies need to be stored and transported in pressure vessels. Composite gas cylinders with fiber-wound steel liners can effectively reduce weight and increase vehicle safety during driving. Composite CNG gas cylinders have become the best carrier for natural gas storage and transportation because of their advantages such as light weight, high specific strength, safety against damage, energy saving and convenient transportation. [0003] In the wound gas cylinder with fiber-wound ...

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Problems solved by technology

Among them, the toughening agent is preferably a mixture of AGE and QS-H Qishi toughening agent, QS-H is carboxyl-terminated nitrile rubber, using the above-mentioned toughening agent, the "sea-island structure" can be used for toughening, but the above-mentioned toughening The toughening agent has the following defects. With the increase of its dosage, it will lead to a decrease in temperature resistance. The specific performance is that the glass transition point (Tg) decreases, and it is easier to form a phase separation phenomenon with epoxy resin.

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