Glass fiber reinforced plastic composite material and preparation method thereof

Abstract

The invention discloses a preparation method of a polyacrylonitrile-based carbon fiber. According to the invention, a polyhydroxy and / or polyamino polymer is added into a conventional sizing agent component, so the diameter of the carbon fiber finished by the sizing agent is increased, the tensile strength of the carbon fiber is enhanced, and meanwhile, the fuzzing amount of the carbon fiber is reduced. In addition, the invention also provides a method for preparing an epoxy resin-based glass fiber reinforced plastic composite material from the polyacrylonitrile-based carbon fiber. The performance of the carbon fiber is optimized, so the finally prepared glass fiber reinforced plastic composite material is high in elastic modulus and good in shear strength and wear resistance.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a glass fiber reinforced plastic composite material and a preparation method thereof. Background technique [0002] FRP is a fiber-reinforced plastic, which generally refers to a reinforced plastic compounded with glass fiber, carbon fiber or boron fiber as a reinforcing material. At present, due to the different types of resins used, there are polyester FRP, epoxy FRP, and phenolic FRP. Due to its high mechanical strength, stable performance, light weight and high hardness, FRP can be used instead of steel, and is widely used in machinery manufacturing, aerospace, decorative construction and other fields. At the same time, FRP also has the following defects: 1. Low elastic modulus. The elastic modulus of FRP is twice as large as that of wood and 10 times smaller than that of steel. FRP products often feel insufficient rigidity and easy to deform in actual ...

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Problems solved by technology

At the same time, FRP also has the following defects: 1. Low elastic modulus. The elastic modulus of FRP is twice as large as that of wood and 10 times smaller than that of steel. FRP products often feel insufficient rigidity and easy to deform in actual use; 2. Low shear strength; 3. The wear resistance is poor. The interlayer shear strength and wear resistance of FRP are all borne by the resin. The resin matrix commonly used has low strength and poor wear resistance. In addition, fiber reinforced materials Poor adhesion to the resin matrix is ​​also an important reason for the low shear strength of FRP

Therefore, more fine denier fibers are used, and coarse denier fibers are rarely used due to the difficulty in improving the tensile strength.

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