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| Titel: |
Study on the Synthetic Technology of Polyethylene Glycol's Gemini Surfactant and Its Suspension Properties |
| Auteur: |
Liwen, Zhao Honglu, Xie |
| Verschenen in: |
Journal of dispersion science and technology |
| Paginering: | Jaargang 29 (2008) nr. 2 pagina's 284-288 |
| Jaar: |
2008-02 |
| Inhoud: |
Sodium α-sulfonated polyethylene glycol (400) stearate was synthesized by the reaction of stearic acid with polyethylene glycol using phosphoric acid and p-Toluene sulfonic acid as catalysts, following by sulfonation with chlorosulfonic acid and neutralization. Effects of single factors such as temperature, time, material ratio on the esterification ratios were investigated. On this basis, employing the orthogonal design, the optimum synthetic conditions were studied. Experiment results: Stearic acid and polyethylene glycol reacted for 4 hours at 140-150°C with the mole ratio 2.5:1.0 with 2.0% catalyst to give the product in 83% yield. Chlorosulfonic acid and Stearate reacted for 1 hour at 60-70°C with mole ratio 2.4:1.0 to give the product in 96% yield. Total yield was 79.7%. Gemini surfactants demonstrated good suspension ability and cooperative effect of mixed system. Compared to conventional surfactants, Gemini surfactants have prior performance attributed to few change in suspension ratios at high temperature and in rate of viscosity change in impact experiments. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 148 van 189 gevonden artikelen
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