Bulletin of the Graduate School of Education, Hiroshima University. Part. II, Arts and science education Issue 50
2002-02-28 発行

スチレン/アクリルアミド共重合体に対する界面活性剤の吸・脱着速度

Adsorption and Desorption Kinetics of Surfactants to and from Styrene/Acrylamide Copolymer
Miyamoto, Shiori
Kuwai, Itsuki
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abstract
The desorption rate of surfactants ions from styrene / acrylamide copolymer latex par-ticles was investigated by applying the electric stopped-flow method at the concentration below the critical micell concentration. The surfactants used were sodium decyl, sodium dodecyl, sodium tetradecyl and sodium hexadecyl sulfates. The desorption rate constants were obtained by applying the first-order reaction scheme. The adsorption rate constants of those ions to the particles were estimated from the experimental desorption rate con-stants and adsorption equilibrium constants assuming the second-order kinetics. The de-sorption rate constants were determined to be 4 - 7sec-1 and the adsorption rate constants to be 3 X 104 - 2 X 105 mol - I dm3 sec - 1 ; the former decreased and the latter increased with increasing number of carbon atoms in alkyl chain of the surfactants.
subject
スチレン/アクリルアミド共重合体
硫酸アルキルナトリウム
吸着
脱離
伝導度ストップトフロー法
Styrene/Acrylamide Copolymer
Sodium Alkyl Sulfates
Adsorption
Desorption
Electric Conductivity Stopped-flow Method
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