Journal
APPLIED CLAY SCIENCE
Volume 181, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.clay.2019.105231
Keywords
Magadiite; Layered silicates; Dispersion; Complexation; Polyethylene glycol
Funding
- National Key R&D Program of China [2017YFB0702800]
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By using the combination of PEG 300 (polyethylene glycol with average molecular weight of 300) and sodium salts, highly dispersed nanosheets of magadiite were directly obtained from hydrothermal synthesis. The total concentration of sodium ions(Na+/PEG 300), the crystallization time and the stirring speed are three key parameters that determine the dispersion of magadiite. As the molar ratio of Na+/PEG 300 was increased to 0.96 or above, highly dispersed nanosheets of magadiite were synthesized. By increasing the stirring speed, magadiite becomes more stable and its dispersity is greatly enhanced. Based on these results, a mechanism for the formation of dispersed magadiite has been proposed, in which in situ delamination was assumed.
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