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Nano silica surface modification
The surface of nano-SiO 2 is hydrophilic, which leads to poor compatibility when it is combined with organic substances such as rubber, which is difficult to mix in and disperse
① Heat treatment
After heat treatment, the moisture absorption of the silica surface is low, and the moisture absorption of the filled product is also significantly reduced.
②Chemical modification
The surface active silanol group of SiO 2 can chemically react with organic silane, alcohol and other substances to improve its affinity and reactivity with polymers
a.
b.
Related links: Physical and chemical properties and preparation methods of nano-silica