Synthesis of magnesium oxysulfate whiskers in the presence of sodium dodecyl benzene sulfonate

✍ Scribed by X. T. Sun; L. Xiang

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 178 KB
• Volume: 43
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.200711113

✦ Synopsis

Uniform magnesium oxysulfate (5Mg(OH) 2 •MgSO 4 •3H 2 O) whiskers with a length of 10-15 µm and a diameter of 0.4-1.0 µm were synthesized in the presence of sodium dodecyl benzene sulfonate (Na-SO 3 -C 6 H 4 -C 12 H 25 ) at 200°C for 1 h, using MgSO 4 •7H 2 O and NaOH as the reactants. Mg(OH) 2 precursor with poor crystallization and small crystal size was formed owing to the adsorption of sodium dodecyl benzene sulfonate on the Mg(OH) 2 surface. The quick dissolution of Mg(OH) 2 precursor in the subsequent hydrothermal reaction inhibited the occurrence of the sector-like byproduct and promoted the formation of magnesium oxysulfate whiskers with uniform morphology.