Effect of Salt on Temperature-Swing Adsorption of Nonionic Surfactant with Poly(Vinylmethyl Ether) Gel

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

KAZUAKI YAMAGIWA¹  HISAO ICHIJO²  MASANORI YOSHIDA³  MIKINORI KATOH¹  AKIRA OHKAWA³ 

[1] Graduate School of Science and Technology, Niigata University;National Institute of Materials and Chemical Research;Department of Chemistry and Chemical Engineering, Niigata University

关键词: Adsorption;    Temperature-Swing;    Temperature-Sensitive Hydrogel;    Salt;    Nonionic Surfactant;   

DOI  :  10.1252/jcej.34.479

来源: Maruzen Company Ltd

【 摘 要 】

References(5)Cited-By(1)The effect of salt concentration on temperature-swing adsorption of nonionic surfactant Triton X-100 with poly(vinylmethylether) gel (PVMEG) was investigated with sodium salts of citrate, succinate, sulfate, hydrogen phosphate, chloride and nitrate. With increasing salt concentration, the amount of Triton X-100 adsorbed on PVMEG increased and the critical temperature range across which the adsorbed amount of Triton X-100 drastically changed shifted to the lower temperature side. The effects of salt type and concentration on temperature-swing adsorption process were evaluated in terms of effective adsorbed amount, midpoint temperature and temperature sensitivity. The effective adsorbed amount increased with increasing ionic strength up to a certain critical value depending on salt type, and then sharply decreased above the critical value. The dependency of midpoint temperature on ionic strength below the critical value was different from that above the critical value. The temperature sensitivity became minimum at ionic strength around the critical value .The critical ionic strength was found to be depend mainly on the valence of ion.

【 授权许可】

Unknown