scholarly journals Polymer-Amphiphile Interactions: An Overview

2017 ◽  
Vol 19 (2) ◽  
pp. 99 ◽  
Author(s):  
Manorama Panda ◽  
Mohammad Kamil
Keyword(s):  
Aqueous Solution ◽  
Physicochemical Properties ◽  
Aqueous Solutions ◽  
Gemini Surfactants ◽  
Review Article ◽  
Present Review ◽  
Complex Behavior ◽  
Solution Properties ◽  
Polymer Systems ◽  
Mixed Systems

Interactions between the polymers and amphiphiles in aqueous solutions have generated considerable interest among researchers because of the widespread applications, relatively complex behavior and improved physicochemical properties of the mixtures. Numerous studies on the surfactant-polymer systems have been carried out in recent years and the number of scientific reports has considerably increased. Various applications of polymers in different areas and many works concerning the amphiphiles are being published every year. Usually, the mixed systems containing polymers and amphiphiles show solution properties different from those of individual solutions due to interaction between the components. The present review article mainly focuses on the behaviour of polymers in aqueous solutions, in the absence or presence of amphiphiles, such as surfactants, drugs, etc. It also summarizes effect of the nature of amphiphiles on aggregation properties of polymers in aqueous solution, and interaction of conventional as well as gemini surfactants with polymers.

Experimental and Theoretical Approach to Mixed Systems of Non-Ionic Cremophor EL and Cationic Gemini Surfactants in Aqueous Solution

2015 ◽  
Vol 229 (3) ◽  
Author(s):  
Andleeb Z. Naqvi ◽  
Sahar Noori ◽  
Kabir-ud-Din
Keyword(s):  
Aqueous Solution ◽  
Surface Tension ◽  
Gemini Surfactants ◽  
Cremophor El ◽  
Practical Applications ◽  
Surfactant Solutions ◽  
Cationic Gemini Surfactants ◽  
Mixing Behavior ◽  
Different Types ◽  
Mixed Systems

AbstractSurfactant solutions in practical applications usually are mixtures of different types, especially ionic and nonionic ones. The mixing behavior of nonionic Cremophor EL-cationic gemini systems was therefore investigated by surface tension measurements. The Gemini surfactants used were of the type alkanediyl –

Polymerizable Anionic Gemini Surfactants: Physicochemical Properties in Aqueous Solution and Polymerization Behavior

2009 ◽  
Vol 58 (8) ◽  
pp. 403-413 ◽  
Author(s):  
Kenichi Sakai ◽  
Miyuki Wada ◽  
Wataru Matsuda ◽  
Koji Tsuchiya ◽  
Yuichiro Takamatsu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Physicochemical Properties ◽  
Gemini Surfactants ◽  
Polymerization Behavior

scholarly journals Quaternary Ammonium-Type Gemini Surfactants Synthesized from Oleic Acid: Aqueous Solution Properties and Adsorption Characteristics

2013 ◽  
Vol 62 (7) ◽  
pp. 489-498 ◽  
Author(s):  
Kenichi Sakai ◽  
Yuki Saito ◽  
Akihito Uka ◽  
Wataru Matsuda ◽  
Yuichiro Takamatsu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Oleic Acid ◽  
Quaternary Ammonium ◽  
Gemini Surfactants ◽  
Solution Properties ◽  
Adsorption Characteristics ◽  
Acid Aqueous Solution

scholarly journals Synthesis and aqueous solution properties of homologous gemini surfactants with different head groups

2007 ◽  
Vol 5 (2) ◽  
pp. 620-634 ◽  
Author(s):  
Yuhai Sun ◽  
Yujun Feng ◽  
Hongwei Dong ◽  
Zhi Chen ◽  
Likun Han
Keyword(s):  
Aqueous Solution ◽  
Gemini Surfactant ◽  
Gemini Surfactants ◽  
Structural Features ◽  
Water Interface ◽  
Solution Properties ◽  
Surface Activities ◽  
Head Groups ◽  
Air Water Interface ◽  
Monomeric Surfactants

AbstractA series of homologous gemini surfactants possessing identical hydrophobic chains but different ionic head groups (cationic, anionic, zwitterionic) were synthesized, and their aqueous solution properties were examined. The results showed that the surface activities of gemini surfactants are superior to those of corresponding conventional monomeric surfactants, and molecular arrangements of gemini surfactants at the air-water interface are tighter than those of corresponding conventional surfactants. It was also found that zwitterionic gemini surfactant possesses the highest surface activity among the three surfactants. The behavior at the air-water interface is closely related to the molecular structural features of surfactants, which provide an indication for synthesizing highly-efficient surfactants.

scholarly journals Features of Urea influence on physicochemical properties of working solutions of insecticides

2021 ◽  
pp. 8-11
Author(s):  
О. Vlasova ◽  
M. Sekun ◽  
M. Zatserklyana
Keyword(s):  
Aqueous Solution ◽  
Surface Tension ◽  
Physicochemical Properties ◽  
Aqueous Solutions ◽  
Technological Process ◽  
Laboratory Experiments ◽  
Plant Protection ◽  
Analytical Analysis ◽  
Field Crops ◽  
Evaporation Of Droplets

Goal. To study the effect of Urea on the properties of working solutions of emulsions and suspensions of chemical and microbiological drugs in plant protection against pests. Methods. Information-analytical analysis of the effectiveness of joint use of insecticides with Urea. Laboratory experiments on the effect of Urea on: evaporation of droplets from the treated surface; surface tension; reaction of the medium of suspensions and emulsions of working solutions of chemical and microbiological preparations. To do this, in aqueous solutions of insecticides and biological products in concentrations recommended for use in field crops, was added 0.2% aqueous solution of Urea. After a certain period of time, the characteristics of the solutions were determined. An analytical generalization of the change in the properties of working solutions under the influence of urea is carried out. Results. The information on the possibilities of joint use of insecticides and microbiological preparations with Urea in a single technological process is generalized. Their combination leads to a significant reduction in the evaporation of solution droplets from the treated surface, but does not affect the surface tension and reaction of the solutions. Conclusions. Urea is an active anti-evaporator of working solutions of insecticides of various nature. Adding it to the solutions of evaporation of drops from the treated surface reduces more than 1.5 times. It does not significantly affect the surface tension and reaction of the solution. This characteristic of the solutions is maintained for 24 hours after preparation.

Preparation and characterisation of vanadium pentoxide supported rhodium catalyst

1988 ◽  
Vol 46 ◽  
pp. 946-947
Author(s):  
A. Legrouri
Keyword(s):  
Aqueous Solution ◽  
Thermal Decomposition ◽  
Physicochemical Properties ◽  
Surface Area ◽  
Vanadium Pentoxide ◽  
High Purity ◽  
Gas Adsorption ◽  
Rhodium Catalyst ◽  
Optical Methods ◽  
Reducible Oxides

The industrial importance of metal catalysts supported on reducible oxides has stimulated considerable interest during the last few years. This presentation reports on the study of the physicochemical properties of metallic rhodium supported on vanadium pentoxide (Rh/V2O5). Electron optical methods, in conjunction with other techniques, were used to characterise the catalyst before its use in the hydrogenolysis of butane; a reaction for which Rh metal is known to be among the most active catalysts.V2O5 powder was prepared by thermal decomposition of high purity ammonium metavanadate in air at 400 °C for 2 hours. Previous studies of the microstructure of this compound, by HREM, SEM and gas adsorption, showed it to be non— porous with a very low surface area of 6m2/g3. The metal loading of the catalyst used was lwt%Rh on V2Q5. It was prepared by wet impregnating the support with an aqueous solution of RhCI3.3H2O.

Review on Silicone Surfactants: Silicone-based Gemini Surfactants, Physicochemical Properties and Applications

2019 ◽  
Vol 56 (4) ◽  
pp. 268-278 ◽  
Author(s):  
Dipak D. Pukale ◽  
Archana S. Bansode ◽  
Nilesh L. Jadhav ◽  
Dipak V. Pinjari ◽  
Rahul R. Kulkarni
Keyword(s):  
Physicochemical Properties ◽  
Gemini Surfactants ◽  
Silicone Surfactants

Ahara as Pathya and Apathya in Amlapitta - A Review.

2017 ◽  
Vol 2 (1) ◽  
Author(s):  
Rakshith . ◽  
Shivakumar . ◽  
Sreeharsha . ◽  
Divyasree .
Keyword(s):  
Physical Health ◽  
Review Article ◽  
The Other ◽  
Social Health ◽  
Present Review ◽  
Common Disease ◽  
The Core ◽  
Common Disorder ◽  
The Common

The core principles in Ayurveda give prime importance to Agni, Prakriti, Ahara (food) and Vihara (lifestyle) in maintaining health. Present era people are scheduled to one or the other works due to which they are following unrightful food and habits which lead the manifestation of one of the common disorder which troubles person a lot - Amlapitta. By excess “Hurry, Worry and Curry” GIT disorders are the most common, not only affecting physical health but also psychological and social health. Amlapitta is one of that and it is a burning problem of the whole World. Amalpitta is composed of word Amla and Pitta. Amlapitta is a very common disease caused by Vidagdha Pitta with features like Amlodgara, Tiktodgara, Hrit, Kantha Daha etc. Pathya recommended in Amlapitta are Yava, Godhuma, Purana Shali, Mudga Yusha, Lajasaktu etc. Apathya recommended in Amlapitta are Navanna, Avidugdha, Masha, Kulattha, Dadhi and etc. So this present review article throws light on Pathya (conducive) and Apathya (non conducive) in Amlapitta.

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