Multifunctional fluorine-containing microsphere as well as preparation method and application thereof

Abstract

The invention belongs to the field of super-amphiphobic materials, and discloses a multifunctional fluorine-containing microsphere as well as a preparation method and application thereof. The multifunctional fluorine-containing microsphere is prepared through the following steps: an inorganic microsphere is modified through a hydrosulphonyl-containing silane coupling agent, so as to obtain a modified inorganic microsphere; a hydrophilic monomer A, epoxy-containing double-bond monomer B and a fluorine-containing monomer C are triggered through hydrosulphonyl on the modified inorganic microsphere, so that the fluorine-containing microsphere with a multifunctional polymer grafted on the surface is obtained. According to the invention, a random copolymer is grafted on the surface of the inorganic microsphere through a one step method, the structure of the surface-grafting part can be adjusted through feeding ratio of monomers, and the method is a simple and feasible preparation method for the super-amphiphobic materials; in addition, the multifunctional fluorine-containing microsphere can endow base material with super hydrophobicity and oleophobicity, the hydrophobicity and oleophobicity of the surfaces of materials can be adjusted through the number of fluorine atoms; obtained super-amphiphobic surfaces has excellent scrub resistance and corrosion resistance.

Description

technical field [0001] The invention belongs to the field of super-amphiphobic materials, and in particular relates to a multifunctional fluorine-containing microsphere and a preparation method and application thereof. Background technique [0002] Surface wettability is one of the important characteristics of solid surfaces. The wettability can be measured by the contact angle of water on the surface. Usually, the surface with a water contact angle of more than 150° and a rolling angle of less than 10° is called a superhydrophobic surface. The surface has a contact angle of more than 150° to oil, which can be considered as a superoleophobic surface. Superamphiphobic surfaces have the characteristics of antifouling, self-cleaning, and hydrophobic properties, and have important application prospects in industrial and agricultural production and daily life. [0003] The roughness and low surface energy of solid surfaces are the most critical factors for the preparation of sup...

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Problems solved by technology

However, the fluorine-containing part on the surface is a thin monomolecular layer, so it is easy to be polluted or damaged

[0005] Patent 201110266897.9 proposes a method of blending fluorine-containing silicon-containing copolymers and silicon dioxide to assemble a film on the surface containing active groups, which can endow the surface with good super-amphiphobic properties. This method is widely used Fluorine-containing silicon-containing copolymers, and blending and assembly reactions are required during use, and the process is relatively complicated

[0006] Patent 201110373304.9 proposes to use atom transfer radical polymerization to graft cross-linkable monomers and fluorine-containing monomers on the surface of amino-modified inorganic microspheres to obtain cross-linkable super-amphiphobic microspheres, which are assembled into films Obtaining a super-amphiphobic surface can also be well bonded to the substrate surface, but the process of this method is cumbersome and requires high reagents and equipment

[0007] In recent years, there have been many literatures and patents on the use of fluoropolymers to construct superhydrophobic and superoleophobic interfaces. However, the adhesion between most fluoropolymers reported in the literature and the surface of the substrate is not strong, which leads to the resistance of the coating. Friction, washing resistance is not strong

In addition, the fluoropolymers used to construct superhydrophobic and superoleophobic are mainly oil-soluble. This oil-soluble fluoropolymer requires a large amount of organic solvents. On the one hand, organic solvents will pollute the environment and are expensive. It will also endanger the health of construction workers

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