Interaction Between GMAC-m-CS and Surfactants: Surface Tension and Conductivity Methods. Issue 10 (2nd October 2016)

• Record Type: Journal Article
• Authors: Zhang, Chuanguang; Yang, Xiaodeng; Wang, Shijie; Li, Junying; Cui, Yuezhi; Li, Tianduo
• Is Part Of: Journal of dispersion science and technology. Volume 37:Issue 10(2016)
• Page Start: 1502
• Page End: 1510
• Publication Date: 2016-10-02
• Subjects: Conductivity -- glycidyl trimethyl ammonium chloride-modified chitosan (GMAC-m-CS) -- interaction -- surface tension; Emulsions -- Periodicals; Suspensions (Chemistry) -- Periodicals; Emulsions; Suspensions; 541.34
• DOI: 10.1080/01932691.2015.1015543
• Languages: English
• ISSNs: 0193-2691

Abstract

Abstract : Glycidyl trimethyl ammonium chloride-modified chitosan (GMAC-m-CS) was synthesized through nucleophilic substitution of GMAC on CS in isopropanol dispersed system, which was characterized by FTIR and 1 H NMR methods. The interaction between GMAC-m-CS and surface active ILs −1-dodecyl (tetradecyl and hexadecyl)-3-methylimidazolium bromide (Cn mimBr, n = 12, 14, 16) was studied by surface tension and conductivity methods. The amount of Cn mimBr adsorbed on GMAC-m-CS increases first with raising temperature, and then decreases, which reaches the largest amount at 30°C. The amount increases with the increase of alkyl chain length. The surface tension reducing capabilities of GMAC-m-CS/Cn mimBr systems increase with temperature, however, decrease with the increase of GMAC-m-CS concentration. The aggregation processes of C14 mimBr in solutions without GMAC-m-CS and with high concentration of GMAC-m-CS were entropy driven; however, it is enthalpy driven in solutions with low concentration of GMAC-m-CS. Based on the analysis of properties of GMAC-m-CS/Cn mimBr, the interaction model of GMAC-m-CS/ILs was proposed. GRAPHICAL ABSTRACT: