Syntheses of Anionic Surfactants Having Two Polyfluoroalkyl Chains and Their Flocculation Ability for Dispersed Magnetite Particles in Water.
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概要
- 論文の詳細を見る
Four anionic surfactants having two polyfluoroalkyl chains in a molecule, sodium salt of bis(1<I>H</I>,1<I>H</I>,2<I>H</I>,2<I>H</I>-heptadecafluorodecyl) 2-sulfosuccinate, CF<SUB>3</SUB>(CF<SUB>2</SUB>)<SUB>7</SUB>(CH<SUB>2</SUB>)<SUB>2</SUB>OCOCH<SUB>2</SUB>CH(SO<SUB>3</SUB>Na)COO(CH<SUB>2</SUB>)<SUB>2</SUB>(CF<SUB>2</SUB>)<SUB>7</SUB>CF<SUB>3</SUB>, sodium salt of bis(1<I>H</I>,1<I>H</I>,9<I>H</I>-hexadecafruorononyl) 2-sulfosuccinate, H(CF<SUB>2</SUB>)<SUB>8</SUB>CH<SUB>2</SUB>OCOCH<SUB>2</SUB>CH(SO<SUB>3</SUB>Na)COOCH<SUB>2</SUB>(CF<SUB>2</SUB>)<SUB>8</SUB>H, sodium salt of bis(1<I>H</I>,1<I>H</I>,7<I>H</I>-dodecafluoroheptyl) 2-sulfosuccinate, H(CF<SUB>2</SUB>)<SUB>6</SUB>CH<SUB>2</SUB>OCOCH<SUB>2</SUB>CH(SO<SUB>3</SUB>Na)COOCH<SUB>2</SUB>(CF<SUB>2</SUB>)<SUB>6</SUB>H and sodium salt of bis(1<I>H</I>,1<I>H</I>,5<I>H</I>-octafluoropentyl) 2-sulfosuccinate, H(CF<SUB>2</SUB>)<SUB>4</SUB>CH<SUB>2</SUB>OCOCH<SUB>2</SUB>CH(SO<SUB>3</SUB>Na)COOCH<SUB>2</SUB>(CF<SUB>2</SUB>)<SUB>4</SUB>H, were prepared from maleic anhydride, the corresponding alcohols having a polyfluoroalkyl chain and sodium hydrogensulfite. The flocculation and redispersion abilities of these surfactants against dispersed magnetite particles in water have been examined in comparison with other four anionic surfactants having a single polyfluoroalkyl chain in a molecule; sodium pentadecafluorooctanoate, CF<SUB>3</SUB>(CF<SUB>2</SUB>)<SUB>6</SUB>COONa, sodium 9<I>H</I>-hexadecafluorononanoate, H(CF<SUB>2</SUB>)<SUB>8</SUB>COONa, sodium 7<I>H</I>-dodecafluoroheptanoate, H(CF<SUB>2</SUB>)<SUB>6</SUB>COONa, and sodium 5<I>H</I>-octafluoropentanoate, H(CF<SUB>2</SUB>)<SUB>4</SUB>COONa. These abilities were estimated by measurement of the contact angle against water using pelleted surface-modified magnetite. The abilities of the surfactants having two polyfluoroalkyl chains against flocculation-redispersion were superior to those of the surfactants having one polyfluoroalkyl chain. Especially, sodium salt of bis(1<I>H</I>,1<I>H</I>,2<I>H</I>,2<I>H</I>-heptadecafluorodecyl) 2-sulfosuccinate was the most effective surface active agent for these abilities.
- 公益社団法人 日本化学会の論文
著者
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Yoshino Norio
Department Of Dental Radiology And Radiation Research Tokyo Medical And Dental University
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Suzuki Jun-ichi
Department Of Advanced Clinical Science And Therapeutics Graduate School Of Medicine University Of T
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Hirai Hidefumi
Department Of Industrial Chemistry Faculty Of Engineering Science University Of Tokyo
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Komine Noboru
Department of Industrial Chemistry, Faculty of Engineering, Science University of Tokyo
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Arima Yuki
Department of Industrial Chemistry, Faculty of Engineering, Science University of Tokyo
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