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Materials 2017, 10(10), 1182;

Microstructural Modification and Characterization of Sericite

School of Materials Science and Technology, China University of Geosciences, No. 29 Xueyuan Road, Haidian District, Beijing 100083, China
Author to whom correspondence should be addressed.
Received: 24 August 2017 / Revised: 6 October 2017 / Accepted: 7 October 2017 / Published: 16 October 2017
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Activated sericite was prepared by thermal modification, acid activation and sodium modification, and it was characterized by X-ray diffraction (XRD) analysis, differential scanning calorimetry (DSC), N2 adsorption test, thermo-gravimetric analysis (TGA), nuclear magnetic resonance (NMR), and scanning electron microscope (SEM). The results indicated that the crystallinity of raw sericite decreased after thermal modification; the pores with sizes between 5 nm to 10 nm of thermal-modified sericite have collapsed and the surface area increased after thermal modification. The dissolving-out amount of Al3+ reached ca. 31 mg/g in the optimal processing conditions during acid activation; cation exchange capacity (CEC) of acid-treated sericite increased to 56.37 mmol/100 g meq/g after sodium modification compared with that of raw sericite (7.42 mmol/100 g). The activated sericite is a promising matrix for clay-polymer nanocomposites. View Full-Text
Keywords: sericite; thermal modification; acid activation; sodium modification sericite; thermal modification; acid activation; sodium modification

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Liang, Y.; Ding, H.; Sun, S.; Chen, Y. Microstructural Modification and Characterization of Sericite. Materials 2017, 10, 1182.

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