Anti-corrosion super-hydrophobic coating and preparing method and application thereof

Abstract

The invention discloses anti-corrosion super-hydrophobic coating and a preparing method and application thereof. The coating comprises, by weight, 0.8-1.2 parts of SBS resin (a styrene-butadiene-styrene triblock copolymer) produced industrially on a large scale, 0.01-0.15 part of natural rubber, 10-30 parts of a solvent, 0.1-2.0 parts of nanosilicon dioxide sol modified by a silane coupling agentand 2.0-8.0 parts of nanometer titania. The preparing method includes the steps of dissolving the SBS resin and the natural rubber in the solvent to be stirred, and adding the modified silicon dioxidesol and nanometer titanium dioxide to be stirred at a room temperature to prepare the coating. The obtained coating has the contact angle larger than 150 degrees and the rolling angle smaller than 6degrees and still has super hydrophobicity after being soaked in saline (3.5% of NaCl) for 10 days. By synergistically modifying the modified silicon dioxide sol and nanometer titanium dioxide, the multi-scale coarse structure on the surface of the plastic coating has excellent and stable hydrophobicity, has good high temperature resistance, ageing resistance and mechanical performance, and is simple in preparing method and wide in application prospect.

Description

technical field [0001] The invention relates to the technical field of paint preparation, and more specifically, to a corrosion-resistant superhydrophobic paint and its preparation method and application. Background technique [0002] A superhydrophobic self-cleaning surface refers to a surface with a contact angle of more than 150° and a rolling angle of less than 10° with water droplets. Materials with superhydrophobic surfaces have a wide range of practical applications in industrial and agricultural production and daily life, such as anti-corrosion protection on glass surfaces. Fog, self-cleaning building materials, anti-corrosion of underwater buildings and vehicles, anti-fouling of fabrics, oil-water separation, and microfluidic transportation, etc. [0003] In recent years, with the in-depth research on superhydrophobic coatings, the preparation methods of superhydrophobic biomimetic coatings emerge in endlessly. In addition, the research on the preparation methods of...

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Problems solved by technology

[0004] So far, although there are many material systems and preparation methods for superhydrophobic biomimetic coatings, due to many reasons, the preparation cost of existing superhydrophobic coatings is generally high, and the preparation process is complicated; in addition, field operation experience shows that the existing Superhydrophobic coatings also have problems such as poor mechanical properties (including adhesion to the substrate, surface hardness and wear resistance, etc.) and easy loss of hydrophobicity, and the comprehensive performance needs to be further improved.

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