scholarly journals Compressibility of polymer colloids. I. Ultrasonic study of aqueous solutions of polymers and their adsorbed state on polystyrene latex

1982 ◽  
Vol 71 (S1) ◽  
pp. S93-S93
Author(s):  
M. A. Barrett Gültepe ◽  
M. E. Gültepe ◽  
E. B. Yeager
Keyword(s):  
Aqueous Solutions ◽  
Polystyrene Latex ◽  
Adsorbed State ◽  
Polymer Colloids ◽  
Ultrasonic Study

Development and creation of zeta potential reference material of the particles in a liquid medium

2021 ◽  
pp. 58-62
Author(s):  
Dmitrii I. Belenkii ◽  
Dmitry V. Averkin ◽  
Dmitry V. Vishnevetskii ◽  
Svetlana D. Khizhnyak ◽  
Pavel M. Pakhomov
Keyword(s):  
Bovine Serum Albumin ◽  
Zeta Potential ◽  
Serum Albumin ◽  
Aqueous Solutions ◽  
Bovine Serum ◽  
Polystyrene Latex ◽  
Powder Materials ◽  
Silver Acetate ◽  
Supramolecular Systems ◽  
Standard Samples

A comprehensive study to develop and create standard samples of the zeta potential unit of particles in a liquid in accordance with the requirements of GOST ISO 13099-2-2016 in the range of measured values from minus 150 mV to plus 150 mV was carried out. The existing standard samples of zeta potential in Russia and the world have been investigated; the analysis of the applicability of the starting materials and components for the creation of new standard samples has done. Samples based on modified polystyrene latex microspheres, bovine serum albumin and supramolecular systems based on aqueous solutions of L-cysteine, N-acetylcysteine, and silver acetate were considered as promising standard samples of the zeta potential of particles. All studies were carried out on equipment from the State Primary Standard of Dispersed Parameters of Aerosols, Suspensions and Powder Materials GET 163-2020 using the method of electrophoretic light scattering and measuring the pH value. It was found that polystyrene latex microspheres do not correspond to the requirements of the work in terms of developing a set of standard samples. Samples based on suspensions of bovine serum albumin do not correspond to the requirements of GOST ISO 13099-2-2016. Supramolecular systems based on aqueous solutions of L-cysteine, N-acetylcysteine, and silver acetate were proposed as standard samples. Such systems are characterized by the ability to modify the initial potential-determining layer of particles without changing their aggregate stability. Studies of the long-term stability of the developed standard samples of the zeta-potential unit of particles in a liquid have been carried out.

Adsorption of sodium cyclododecylmethanoate and cycloundecylmethanoate at the air/water interface

1984 ◽  
Vol 62 (11) ◽  
pp. 2359-2363 ◽  
Author(s):  
Jan J. Spitzer
Keyword(s):  
Aqueous Solutions ◽  
Sodium Ion ◽  
Ion Concentration ◽  
Ionic Surfactants ◽  
Free Energies ◽  
Straight Chain ◽  
Double Chain ◽  
Adsorbed State ◽  
Critical Micelle Concentrations ◽  
Air Water Interface

Surface tension measurements on aqueous solutions of sodium cyclododecylmethanoate and sodium cycloundecylmethanoate in sodium carbonate/bicarbonate buffers and at constant sodium ion concentration at 25 °C were used to obtain the standard free energies of adsorption, the saturation areas per surfactant ion, and the critical "micelle" concentrations of these compounds. Similar measurements were done for solutions of sodium dodecanoate for comparisons.The standard free energies of adsorption of CH2 group that is located in a macrocyclic cycloalkyl ring appears to follow the "rule of two" (−RT ln 2) that is also valid for straight chain ionic surfactants. The saturation areas of both cyclododecylmethanoate and cycloundecylmethanoate are about 52 Å2/ion as compared to about 32 Å2/ion for normal dodecanoate.For large ring cycloalkylmethanoates the critical "micelle" concentrations appear to decrease by a factor of about 4/5 for each CH2 group added to the ring as compared to the factor of about 1/2 for each CH2 group added to the chain of normal alkanoates. The data suggest that large cycloalkyl rings have "collapsed ring", or "double chain", conformation in aqueous solutions and in the adsorbed state.

scholarly journals An Ultrasonic Study of Sphere to Rod Transitions in Aqueous Solutions of Hexadecyltrimethylammonium Bromide.

1982 ◽  
Vol 36a ◽  
pp. 698-700 ◽  
Author(s):  
Sune Backlund ◽  
Harald Høiland ◽  
Ove J. Kvammen ◽  
Eva Ljosland ◽  
V. B. Sokolov ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Hexadecyltrimethylammonium Bromide ◽  
Ultrasonic Study

Ultrasonic Study of Molecular Association of Polyethylenoxide Aqueous Solutions (A Method to Determine Molecular Weight)

1986 ◽  
Vol 18 (3) ◽  
pp. 187-190 ◽  
Author(s):  
Subhi Kemal Hassun ◽  
Suham H. F. Al-Madfai ◽  
Mustafa M. F. Al-Jarrah
Keyword(s):  
Molecular Weight ◽  
Aqueous Solutions ◽  
Molecular Association ◽  
Ultrasonic Study

Ultrasonic Study of Aqueous Solutions of Amines

1977 ◽  
Vol 50 (7) ◽  
pp. 1716-1719 ◽  
Author(s):  
Sadakatsu Nishikawa ◽  
Unpei Otani ◽  
Mitsuo Mashima
Keyword(s):  
Aqueous Solutions ◽  
Ultrasonic Study

Ultrasonic Study of Aqueous Solutions of ZnCl2: From Dilute Solutions to Hydrated Melts

1970 ◽  
Vol 53 (3) ◽  
pp. 859-866 ◽  
Author(s):  
G. S. Darbari ◽  
M. R. Richelson ◽  
S. Petrucci
Keyword(s):  
Aqueous Solutions ◽  
Dilute Solutions ◽  
Ultrasonic Study ◽  
Hydrated Melts
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