title: Interactions of cellulose-based comb polyelectrolyte with oppositely charged surfactant dodecyl-trimethylammonium bromide.
abstract: A comb ethyl cellulose-g-sodium polyacrylate (EC-g-SPA) was synthesized by atom transfer radical polymerization. The amphiphilic properties of the EC-g-SPA were determined by surface tension measurements. The interactions between EC-g-SPA and the cationic surfactant dodecyl-trimethylammonium bromide (C12TAB) were investigated by surface tension, turbidity, dynamic light scattering and transmission electron microscopy (TEM). The results revealed that the critical aggregate concentration (CAC) of the complexes was 0.8mM. When the C12TAB concentration was lower than the CAC, the hydrodynamic diameter (Dh) of the complexes decreased as the surfactant concentration was increased. As the C12TAB concentration was increased above the CAC, the Dh initially increased slightly, followed by a sharp decrease. The changes in the sizes and shapes of the aggregates were studied by TEM. The interactions between two species and the structure of the EC-g-SPA/C12TAB complexes were also discussed.
authors.affiliation: Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, PR China; Department of Basic Science, Tianjin Agricultural College, Tianjin 300384, PR China.
authors.forename: Hong
authors.initials: H
authors.lastname: Pan
authors.affiliation: Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, PR China.
authors.forename: Pei-Yao
authors.initials: PY
authors.lastname: Chen
authors.affiliation: Department of Basic Science, Tianjin Agricultural College, Tianjin 300384, PR China.
authors.forename: Hai-Xue
authors.initials: HX
authors.lastname: Liu
authors.affiliation: Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, PR China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, PR China.
authors.forename: Yu-Ping
authors.initials: YP
authors.lastname: Wei
authors.affiliation: Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, PR China.
authors.forename: Ming-Jie
authors.initials: MJ
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, PR China.
authors.forename: Fa
authors.initials: F
authors.lastname: Cheng
mesh_terms: D002482:Cellulose / Q000031:analogs & derivatives* / Q000737:chemistry; D004573:Electrolytes / Q000737:chemistry*; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D013501:Surface-Active Agents / Q000737:chemistry*
chemical_list: D004573:Electrolytes; D000644:Quaternary Ammonium Compounds; D013501:Surface-Active Agents; C013517:ethyl cellulose; D002482:Cellulose