title: Interaction between xanthan gum and cationic cellulose JR400 in aqueous solution.
abstract: The electrostatic and hydrogen bonding interactions between xanthan gum (XG) and semisynthetic cationic cellulose (JR400) in aqueous solution are investigated via stability map, FT-IR spectra, thermogravimetric analysis, potentiometric measurement and rheological method. The stability map shows three regions, a stable region with XG as the major component, a flocculated region and another stable region with JR400 as the major component. The stability of mixing system depends on both the concentration fraction of JR400 (fJR) and the overlapping concentrations of these two polymers. In the region near the stoichiometric fJR, the mixture shows stoichiometric flocculation, which is independent of the total polymer concentration. However, in the regions away from the stoichiometric fJR, the mixtures are stable when the concentration of major polymer component is higher than its overlapping concentration. In stable regions, the electrostatic and hydrogen bonding interactions can enhance the viscosity of mixing system at appropriate fJR values.
authors.affiliation: Key Laboratory for Colloid and Interface Chemistry of Education Ministry, Shandong University, Jinan 250100, PR China.
authors.forename: Haiping
authors.initials: H
authors.lastname: Li
authors.affiliation: Key Laboratory for Colloid and Interface Chemistry of Education Ministry, Shandong University, Jinan 250100, PR China; Key Laboratory for Eco-chemical Engineering of Education Ministry, Qingdao University of Science and Technology, Qingdao 266042, PR China.
authors.forename: Wanguo
authors.initials: W
authors.lastname: Hou
authors.affiliation: Huiqu Junior High School of Anqiu City, Anqiu 262121, Shandong Province, PR China.
authors.forename: Xiuzhi
authors.initials: X
authors.lastname: Li
mesh_terms: D002482:Cellulose / Q000737:chemistry*; D011135:Polysaccharides, Bacterial / Q000737:chemistry*; D011199:Potentiometry; D012212:Rheology; D012996:Solutions; D017550:Spectroscopy, Fourier Transform Infrared; D013818:Thermogravimetry; D014783:Viscosity
chemical_list: D011135:Polysaccharides, Bacterial; D012996:Solutions; D002482:Cellulose; C002563:xanthan gum