Preparation of a durable superhydrophobic coating and its application on glass fibers
Glass fibers are widely used in various fields such as construction and aerospace due to their lightweight and high-strength properties.However,the strong hydrophilicity of glass fibers makes them prone to absorb moisture in humid environments,resulting in a decrease in mechanical properties and shortening service life.To improve the durability of glass fibers and expand their application range,employing emulsion polymerization with the crosslinking agent diethylene glycol diacrylate(DEGDA),a spheri-cal polymer crosslinked network structure with low surface energy was formed by using methyl methacrylate(MMA)and vinyl triethoxysilane(VTES).Subsequently,nano-SiO2 particles modified by silane coupling agent were covalently bonded to the polymer network,creating a durable superhydrophobic coating on the surface of glass fibers.When the organic silicone component VTES content is 30 wt%and the nano-SiO2 component content is 5 wt%,the coating exhibits excellent superhydrophobicity,with a water contact angle of 154.6°±0.8°.After immersion in acid-base solutions for 10 days,exposure to ultraviolet radiation for 48 hours,and 60 abrasion cycles,the water contact angle of the coating remains above 150°,indicating good weather resistance and mechanical durability.After a brief high-temperature treatment,the O2 plasma-etched coating can restore from a superhydrophilic state to a superhydrophobic state,demonstrating excellent self-healing properties.The experimental results show that this coating significantly enhances the durability of glass fibers,providing a robust guarantee for their long-term stable use.In addition,the coating can be used on a variety of substrates such as glass,copper foam,filter paper,sponges,etc.It is expected to be widely used in more fields.
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