The surface groups and active site of fibrous mineral materials

Abstract

The exposed and transformed groups of fibrous brucite, wollastonite, chrysotile asbestos, sepiolite, palygorskite, clinoptilolite, crocidolite and diatomaceous earth mineral materials are analyzed by IR spectra after acid and alikali etching, strong mechanical and polarity molecular interaction. The results show the active sites concentrate on the ends in stick mineral materials and on the defect or hole edge in pipe mineral materials. The inside active site of mineral materials plays a main role in small molecular substance. The shape of minerals influence their distribution and density of active site. The strong mechanical impulsion and weak chemical force change the active site feature of minerals, the powder process enables minerals exposed more surface group and more combined types. The surface processing with the small polarity molecular or the brand of middle molecular may produce ionation and new coordinate bond, and change the active properties and level of original mineral materials.

Keywords

fibrous minerals / surface groups / active site

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