کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
609940 880634 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
New synthesis strategies for effective functionalization of kaolinite and saponite with silylating agents
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
New synthesis strategies for effective functionalization of kaolinite and saponite with silylating agents
چکیده انگلیسی

Functionalization of Brazilian São Simão kaolinite and Spanish Yunclillos saponite with the alkoxysilanes 3-aminopropyltriethoxysilane and 3-mercaptopropyltrimethoxysilane is reported. The resulting hybrids were characterized by X-ray diffraction, thermal analysis, infrared absorption spectroscopy, and scanning electron microscopy, which demonstrated the effectiveness of the interlamellar grafting process. The X-ray diffractograms revealed incorporation of the alkoxide molecules into the interlayer space of the clays. The displacement of the stretching bands of interlayer hydroxyls in the infrared spectra of the modified kaolinites and the increased intensity of the Mg–OH vibrations in the spectra of the modified saponites confirmed the functionalization of the clays. The thermal behavior of the organoclays confirmed the stability of the hybrids, which was dependent on the clay used for preparation of the materials.

Kaolinite, previously intercalated with dimethyl sulfoxide, and saponite, has been successfully functionalized with the alkoxysilanes 3-aminopropyltriethoxysilane (APTS) and 3-mercaptopropyltrimethoxysilane (MPTMS).Figure optionsDownload high-quality image (52 K)Download as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 341, Issue 1, 1 January 2010, Pages 186–193
نویسندگان
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