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Open Access γ-aminopropyl Triethoxysilane Graft on Surface of Attapulgite

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γ-aminopropyl triethoxysilane(APTES) was grafted onto the surface of attapulgite(ATP) by hydrous system and anhydrous system modification methods respectively, obtained the modification particles AT-APTES. The samples were characterized by Fourier transform infrared spectra, DXR smart Raman spectrometer, thermo gravimetric analyzer and transmission electron microscopy. In infrared and Raman spectra, the appearance of amino group absorption peak at 3 350 cm-1 and 3 321 cm-1 both conformed the APTES was successfully grafted onto surface of ATP. Titration method was used to determine the graft degree of APTES. The influence of formulation and grafting process on graft degree of APTES was investigated. The results showed that, in hydrous systems, APTES use more than 5% and the modification time more than 6 h both would cause the decrease of graft degree. In anhydrous systems, the graft degree of the modified particles was significantly higher than the hydrous systems, and the graft efficiency was higher. In the glycol system, due to the stacking interactions of hydroxy centers, the graft degree obtained in a reaction time of 6 h was up to 725.8 mmol/kg.
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Keywords: attapulgite; graft degree; graft efficiency; γ-aminopropyl triethoxysilane

Document Type: Research Article

Publication date: 2013-06-01

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  • Journal of the Chinese Ceramic Society (JCCS), published in Chinese and in English, is a comprehensive monthly periodical focused on the fields of inorganic and non-metallic materials. The main purpose of the JCCS is to report the latest creative achievements in research, production and design for ceramics, glass, cementing materials, refractory, artificial crystals and other non-metallic materials. JCCS is regarded as an important journal in inorganic and non-metallic materials sciences in China and has been awarded by China Association for Science and Technology. The full-text of papers in JCCS is also published by CNKI (China National Knowledge Infrastructure). JCCS is indexed in EI Compendex, CA( Chemical Abstracts) ,SA and Ж and more than 20 databases.
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