Resin matrix composite with super-hydrophobic bionic surface and preparation method of resin matrix composite

Abstract

The invention provides a resin matrix composite with a super-hydrophobic bionic surface and a preparation method of the resin matrix composite. The method comprises steps as follows: the surface of a matrix of the resin matrix composite is polished until the surface turns white; the matrix of the resin matrix composite is processed through ultrafast laser, and a microstructure is formed on the surface; a first coating is sprayed on the microstructure surface of the matrix of the resin matrix composite through a pneumatic type paint spray gun to form a bonding layer, a second coating containing nanosilicon dioxide particles is sprayed to form a surface hydrophobic function layer, and the resin matrix composite with the super-hydrophobic bionic surface is obtained. The preparation method is simple to operate and facilitates production, the prepared resin matrix composite with the super-hydrophobic bionic surface can allow water drops to freely slip off, and the real self-cleaning super-hydrophobic function is realized.

Description

technical field [0001] The invention relates to a resin-based composite material with a superhydrophobic bionic surface and a preparation method thereof, belonging to the field of composite materials. Background technique [0002] The wettability (also known as wettability) of the solid surface to the liquid is an important property of the material surface. It is the macroscopic performance of the structure and properties of the solid surface, the surface properties of the liquid, and the interaction between solid-liquid two-phase molecules. , the wettability of the solid surface can be measured by two important indicators of contact angle (CA, ContactAngle) and rolling (SA, SlidingAngle). People usually call the surface with a water contact angle greater than 90° as a hydrophobic surface, and the surface with a water contact angle greater than 150° is called a superhydrophobic surface. For a self-cleaning superhydrophobic surface, it is generally considered that the rolling...

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Problems solved by technology

This requires not only forming a material with low surface energy on the surface of the material, but also forming a relatively complex surface morphology on the surface of the material, such as forming a secondary or higher micro-nano structure, generating "composite water droplets" to ensure that the water droplets can be removed from the surface. The rough surface slides freely, etching and its composite method with low surface energy coating are the best methods to produce this structure, but the previous etching methods, such as chemical corrosion (see the literature "Glass Fiber Reinforced Epoxy Composites Preparation of hydrophobic surface layer"), traditional etching such as plasma or long-pulse laser, or the implementation process is relatively complicated and difficult to implement (not easy to react with acetone and acid after curing), or due to the thermal effect of high-energy beam etching. matrix composite damage

[0010] CN201110077761 discloses a method for preparing a hydrophobic coating by thermal spraying. It uses thermal spraying technology to spray composite powder (micron-scale metal or alloy powder coated nano-scale ceramic powder) on the surface of the substrate to form a micro-nano secondary structure. Then use a hydrophobic organic coating to modify it to form a super-hydrophobic bionic surface. Due to the large thermal effect of thermal spraying, this method is suitable for spraying on metals to manufacture surface micro-nano structures. If it is applied to resin-based composite materials, it will inevitably cause thermal damage. , and the bonding strength is low, so it is not suitable for resin matrix composites

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