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Intercalation and Exfoliation of Kaolinite with Sodium Dodecyl Sulfate

Centre for Mineral Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
Hunan Key Lab of Mineral Materials and Application, Central South University, Changsha 410083, China
School of Geoscience and Surveying Engineering, China University of Mining & Technology, Beijing 100083, China
Authors to whom correspondence should be addressed.
Minerals 2018, 8(3), 112;
Received: 24 January 2018 / Revised: 26 February 2018 / Accepted: 7 March 2018 / Published: 9 March 2018
PDF [2020 KB, uploaded 9 March 2018]


Kaolinite (Kaol) was intercalated with dimethyl sulfoxide (DMSO) and subsequently methanol (MeOH) to prepare intercalation compounds Kaol-DMSO and Kaol-MeOH. Kaol-MeOH was used as an intermediate to synthesize Kaol-sodium dodecyl sulfate (SDS) intercalation compound (Kaol-SDS) via displacement reaction. The ultrasonic exfoliation of Kaol-SDS produced a resultant Kaol-SDS-U. The samples were characterized by X-ray diffraction (XRD), Fourier transformation infrared spectroscopy (FTIR), thermal analysis, scanning electronic microscopy (SEM), transmission electron microscopy (TEM) and particle size analysis. The results revealed that the intercalation of sodium dodecyl sulfate into kaolinite layers caused an obvious increase of the basal spacing from 0.72–4.21 nm. The dehydroxylation temperature of Kaol-SDS was obviously lower than that of original kaolinite. During the intercalation process of sodium dodecyl sulfate, a few kaolinite layers were exfoliated and curled up from the edges of the kaolinite sheets. After sonication treatment, the kaolinite layers were further transformed into nanoscrolls, and the exfoliated resultant Kaol-SDS-U possessed a smaller particle size close to nanoscale. View Full-Text
Keywords: kaolinite; intercalation; exfoliation; sodium dodecyl sulfate kaolinite; intercalation; exfoliation; sodium dodecyl sulfate

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Zuo, X.; Wang, D.; Zhang, S.; Liu, Q.; Yang, H. Intercalation and Exfoliation of Kaolinite with Sodium Dodecyl Sulfate. Minerals 2018, 8, 112.

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