Iota Silicone Oil (Anhui) Co., Ltd
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Surface modification of silica particles transforms their compatibility with diverse media. Hydrophilic silica, rich in silanol groups (≡Si-OH), interacts strongly with polar solvents. Hydrophobization via silane coupling agents (e.g., hexamethyldisilazane) replaces silanols with nonpolar alkyl groups, reducing water affinity. This technique is critical for enhancing dispersion in plastics, improving anti-blocking in films, and stabilizing emulsions. The degree of modification, quantified by contact angle measurements, dictates final performance.
