Preparation method of silicon carbide modified epoxy resin and silicon carbide modified epoxy resin composite material

Abstract

The invention discloses a preparation method of silicon carbide modified epoxy resin and a silicon carbide modified epoxy resin composite material. The silicon carbide modified epoxy resin comprises the following raw materials: polyethylene fibers with a super-high molecular weight, 0.03-0.5g of Tris, 200ml of water, 0.1-0.8g of tannic acid, 3-8g of NaCl, silicon carbide, absolute ethanol, epoxy resin, and a 1,3-bis(aminomethyl)benzene curing agent. According to the method provided by the invention, the silicon carbide modified epoxy resin prepared by the method has a simple process and low costs, reagents used in the resin are conventional reagents, special equipment is not needed, and therefore the silicon carbide modified epoxy resin has the characteristic of easy industrialization implementation; and according to the silicon carbide modified epoxy resin prepared by the method, the silicon carbide is added into the epoxy resin, and the silicon carbide not only improves resin properties, but also improves interfacial bonding force by enhancing a cross network of the resin and the tannic acid.

Description

technical field [0001] The invention relates to the technical field of composite materials of fibers and resins, in particular to a preparation method of silicon carbide modified epoxy resin and composite materials thereof. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) fiber was successfully developed in the early 1980s. It is the third generation of high-performance fiber after carbon fiber and aramid fiber. It is currently the fiber with the highest specific strength and specific modulus in the world. . It has a series of excellent properties, such as: high specific strength and high specific modulus, the specific strength is more than ten times that of steel wire with the same cross section, and the specific modulus is second only to super carbon fiber. The elongation at break is low, the work at break is large, and it has a strong ability to absorb energy, so it has outstanding impact resistance and cut resistance. The fiber density is...

AI Technical Summary

Problems solved by technology

However, due to the lack of polar groups on the surface of UHMWPE fibers, no chemical activity, low surface energy, non-polar substances are difficult to infiltrate, and the melting point is low, which limits its application.

Especially in the aspect of reinforced resin-based composite materials, the bonding performance between it and the resin matrix is ​​poor, resulting in low impact resistance, which leads to problems such as debonding of the fiber and the resin matrix and cracking of the resin matrix during the use of the composite material.