Method for preparing hydrophobic nano-white carbon black by virtue of sol-gel method

Abstract

The invention discloses a method for preparing hydrophobic nano-white carbon black by virtue of a sol-gel method. According to the method, rice hull ash and bentonite are taken as the raw materials, the rice hull ash is subjected to acid pickling and impurity removal, the bentonite is subjected to acid pickling under a microwave effect and reacts with sodium hydroxide in a microwave reaction manner so as to generate a water glass liquid, the water glass liquid is taken as a silicon source, ammonia water is taken as a catalyst, and the prepared white carbon black is small in particle size, large in specific surface area and high in purity and has excellent physical and chemical properties; vinyl silane is taken as a modifying agent, hydrophobic group vinyl is successfully grafted to the surface of the white carbon black by virtue of the sol-gel method, so that the hydrophobicity of the white carbon black is improved, the interaction effect between the white carbon black and silicone rubber is enhanced, and the white carbon black can be widely applied to the fields of low, middle and high-end rubber products, special-use coatings, silicone rubber products and the like and can be particularly applied to the field of insulating silicone rubber products.

Description

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AI Technical Summary

Benefits of technology

This patented technology uses different types of material such as rice shells or baked clay instead of traditional sources like quartz sand that were previously commonly utilized due to its lower costs compared with pure crystalline SiO2. Additionally, this new approach involves modifying certain molecules called vanillin sulfonic acid (VSO) into an organosiloxanes compound, resulting in smaller sizes and increased activity when exposed to moisture. These modified VSO's also improve their ability to bind metal oxides effectively during reactions involving alkali metals. Overall these technical improvements make them more efficient than previous methods while reducing manufacturing costs.

Problems solved by technology

This patented technical problem addressed in this patents relates to traditional ways used to produce silicate (SiO2) that have various qualities such as low density, strong cohesion force, durability against abrasion), flexibility, resistance towards heat aggression, etc., while still maintaining their beneficial characteristics like strengthening elastomer materials made from them.