Preparation method of high-interface-strength fiber composite material

Abstract

The invention discloses a preparation method of a high-interface-strength fiber composite material. The preparation method comprises the steps of material soaking, electric field auxiliary infiltration and high-temperature curing, wherein in the material soaking step, liquid resin is firstly put into a resin tank; the fibers enter the resin tank to infiltrate liquid resin, and the fibers and the liquid resin are fully infiltrated through liquid resin shower; electric field auxiliary infiltration and high-temperature curing are that the fibers subjected to liquid resin shower infiltration pass through a high-temperature electric field box with an electric field, and the electric field drives the liquid resin to flow, so that the liquid resin and the fibers are further wetted; and high-temperature curing is carried out while electric field auxiliary infiltration is performed, so that the liquid resin is cured in micro-grooves in the fiber surface to form mechanical meshing, thereby preparing the high-interfacial-strength fiber composite material. The wetting efficiency of the fibers and the liquid resin is effectively improved under the conditions that the fibers are not modified and procedures are increased excessively, the interface strength of the composite material is remarkably improved, and the comprehensive performance of the composite material is improved.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a preparation method of high interface strength fiber composite material. Background technique [0002] In fiber-reinforced resin-based composites, the fibers play a reinforcing role, while the resin matrix makes the composite material into a whole that bears external forces, and transmits the load to the fibers through the interface, so it has a great impact on the technical performance and molding process of the composite material. have a direct impact. For resin-based composites, interfacial mechanical engagement is extremely beneficial for improving the bonding performance between fibers and the matrix. The increase in interfacial bonding strength can make the reinforcing effect of fibers more effective, because when the composite material is subjected to external force , in addition to the stress on the reinforced material and the matrix, ...

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Problems solved by technology

[0004] However, many scientific research results of comprehensive fiber surface modification have found that conventional fiber modification technology is mostly chemical modification. Although its reaction rate is fast and the effect is obvious, it is difficult to control during the modification process, and it is easy to damage the inside of the fiber, thereby reducing the fiber. strength, which is also the difficulty of fiber surface modification

Most of the new modification technologies are physical modification methods, which cause little damage to the body. However, due to the high requirements for equipment and high cost of the new modification technologies, this is also an important reason restricting its development.

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