The time dependence of chitosan nonionic surfactant solution viscosity
Само за регистроване кориснике
1996
Чланак у часопису (Објављена верзија)

Метаподаци
Приказ свих података о документуАпстракт
The measurement of the viscosity of semiconcentrated chitosan (0.08-0.14%) solutions in the system with octaethyleneglycol mono n-dodecylether (C(12)E(8)) was carried out using Cannon-Fenske capillary viscometer. The interaction was - as expected - very weak, but when the time dependent hydrodynamic behaviour of the system was considered, the interaction has been established at particular surfactant concentrations. The most significant time dependence is shown in a form of sudden viscosity drop in a region close to and above CMC value of the surfactant, which implied existence of the interaction between chitosan and surfactant. At low surfactant concentrations viscosity values vere constant with increasing surfactant concentration, but solution also showed time dependent decrease in the viscosity which has been connected with well known time dependent viscosity of pure chitosan solution. The viscometry enabled monitoring of the extent of chitosan/surfactant association by establishing ...the viscosity decrease rate constant. The rate constant was derived from the first order constant of the quadratic polynomial curves used for the approximation of experimental values when these are presented in the form of viscosity-time profiles. This method showed the existence of critical surfactant concentration values (C-1, C-2, and C-3) These values are closely connected with the proposed interaction model which is based on the assumption that spherical surfactant micelles are bound by chitosan molecule.
Кључне речи:
chitosan / nonionic surfactant / interaction / viscosity / time-dependenceИзвор:
Colloid and Polymer Science, 1996, 274, 4, 375-383Издавач:
- Dr Dietrich Steinkopff Verlag, Berlin 33
DOI: 10.1007/BF00654058
ISSN: 0303-402X
WoS: A1996UG55500009
Scopus: 2-s2.0-0029994680
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Jocić, Dragan AU - Julia, MR AU - Erra, P PY - 1996 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/96 AB - The measurement of the viscosity of semiconcentrated chitosan (0.08-0.14%) solutions in the system with octaethyleneglycol mono n-dodecylether (C(12)E(8)) was carried out using Cannon-Fenske capillary viscometer. The interaction was - as expected - very weak, but when the time dependent hydrodynamic behaviour of the system was considered, the interaction has been established at particular surfactant concentrations. The most significant time dependence is shown in a form of sudden viscosity drop in a region close to and above CMC value of the surfactant, which implied existence of the interaction between chitosan and surfactant. At low surfactant concentrations viscosity values vere constant with increasing surfactant concentration, but solution also showed time dependent decrease in the viscosity which has been connected with well known time dependent viscosity of pure chitosan solution. The viscometry enabled monitoring of the extent of chitosan/surfactant association by establishing the viscosity decrease rate constant. The rate constant was derived from the first order constant of the quadratic polynomial curves used for the approximation of experimental values when these are presented in the form of viscosity-time profiles. This method showed the existence of critical surfactant concentration values (C-1, C-2, and C-3) These values are closely connected with the proposed interaction model which is based on the assumption that spherical surfactant micelles are bound by chitosan molecule. PB - Dr Dietrich Steinkopff Verlag, Berlin 33 T2 - Colloid and Polymer Science T1 - The time dependence of chitosan nonionic surfactant solution viscosity EP - 383 IS - 4 SP - 375 VL - 274 DO - 10.1007/BF00654058 ER -
@article{ author = "Jocić, Dragan and Julia, MR and Erra, P", year = "1996", abstract = "The measurement of the viscosity of semiconcentrated chitosan (0.08-0.14%) solutions in the system with octaethyleneglycol mono n-dodecylether (C(12)E(8)) was carried out using Cannon-Fenske capillary viscometer. The interaction was - as expected - very weak, but when the time dependent hydrodynamic behaviour of the system was considered, the interaction has been established at particular surfactant concentrations. The most significant time dependence is shown in a form of sudden viscosity drop in a region close to and above CMC value of the surfactant, which implied existence of the interaction between chitosan and surfactant. At low surfactant concentrations viscosity values vere constant with increasing surfactant concentration, but solution also showed time dependent decrease in the viscosity which has been connected with well known time dependent viscosity of pure chitosan solution. The viscometry enabled monitoring of the extent of chitosan/surfactant association by establishing the viscosity decrease rate constant. The rate constant was derived from the first order constant of the quadratic polynomial curves used for the approximation of experimental values when these are presented in the form of viscosity-time profiles. This method showed the existence of critical surfactant concentration values (C-1, C-2, and C-3) These values are closely connected with the proposed interaction model which is based on the assumption that spherical surfactant micelles are bound by chitosan molecule.", publisher = "Dr Dietrich Steinkopff Verlag, Berlin 33", journal = "Colloid and Polymer Science", title = "The time dependence of chitosan nonionic surfactant solution viscosity", pages = "383-375", number = "4", volume = "274", doi = "10.1007/BF00654058" }
Jocić, D., Julia, M.,& Erra, P.. (1996). The time dependence of chitosan nonionic surfactant solution viscosity. in Colloid and Polymer Science Dr Dietrich Steinkopff Verlag, Berlin 33., 274(4), 375-383. https://doi.org/10.1007/BF00654058
Jocić D, Julia M, Erra P. The time dependence of chitosan nonionic surfactant solution viscosity. in Colloid and Polymer Science. 1996;274(4):375-383. doi:10.1007/BF00654058 .
Jocić, Dragan, Julia, MR, Erra, P, "The time dependence of chitosan nonionic surfactant solution viscosity" in Colloid and Polymer Science, 274, no. 4 (1996):375-383, https://doi.org/10.1007/BF00654058 . .