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Bhagwat, Sunil S.
- Physicochemical Behaviour of Ternary System Based on Coconut Oil/C12E8/n-pentanol/water
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Authors
Affiliations
1 Department of Chemical Engineering, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai-400 019, IN
1 Department of Chemical Engineering, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai-400 019, IN
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Journal of Surface Science and Technology, Vol 29, No 1-2 (2013), Pagination: 1-13Abstract
Physicochemical properties of a system based on Coconut Oil, nonionic surfactant C12E8, cosurfactant n-pentanol and water has been studied. The phase behavior, effect of temperature and electrical conductivity of the system was studied at different surfactant (S) to cosurfactant (C) ratios, the ratios being 1:1, 1:1.5, 1:2 (w/w). Pseudoternary phase behavior of these ratios was studied, the phase diagrams generated distinguishes between monophasic/isotropic and biphasic/anisotropic regions. The monophasic region was found to be a strong function of the S:C ratio. The largest monophasic region was obtained when the S:C ratio was 1:1, the monophasic region gradually depleted with decrease in amount of S in the order 1:1 > 1:1.5 > 1:2. The effect of temperature was examined on the phase behavior of the system, and for all S:C ratios it was observed that the monophasic region decreased with increase in temperature. The electrical conductivity of the system increases with aqueous phase content indicating a transition from water-in-oil to oil-in-water microemulsions.Keywords
Phase Behavior, Coconut Oil, Nonionic Surfactant, Temperature, Conductivity, Microemulsion.
- Solvent Free Synthesis, Characterization and Evaluation of Dimethylaminopropylamine based Double Tailed Amidoamine Cationic Surfactant
Abstract Views :269 |
PDF Views:11
Authors
Affiliations
1 Department of Chemical Engineering, Institute of Chemical Technology, Mumbai - 400019, IN
2 Department of Chemical Engineering, Institute of Chemical Technology, Mumbai - 400019, Maharashtra, IN
1 Department of Chemical Engineering, Institute of Chemical Technology, Mumbai - 400019, IN
2 Department of Chemical Engineering, Institute of Chemical Technology, Mumbai - 400019, Maharashtra, IN
Source
Journal of Surface Science and Technology, Vol 34, No 1-2 (2018), Pagination: 7-18Abstract
Lauramidopropyl dimethylamine was quaternised using Lauryl Bromide to synthesize a double chain cationic surfactant. The surfactant was obtained in good yield without the use of any solvent. Amidoamine cationic surfactant chemical structure was analyzed using mass spectroscopic technique. The physicochemical properties of the amidoamine surfactant were calculated from surface tension and conductance measurements giving a critical micelle concentration of 8.04 × 10-3 mM which is quite lower than conventional surfactants. The amidoamine also exhibits a good foaming ability and wettability. The amidoamine cationic surfactant was evaluated for efficacy against different microorganisms and the results show that it has good antimicrobial activity against both Gram positive and Gram negative bacteria.Keywords
Amidoamine, Critical Micelle Concentration, Quaternization, Surfactant, Synthesis.References
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- Cadmium Removal by Adsorption: Enhancement by Surfactant Mediation
Abstract Views :318 |
PDF Views:2
Authors
Affiliations
1 Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai – 400019, Maharashtra, IN
2 Department of Chemistry, Institute of Chemical Technology, Matunga, Mumbai – 400019, Maharashtra, IN
1 Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai – 400019, Maharashtra, IN
2 Department of Chemistry, Institute of Chemical Technology, Matunga, Mumbai – 400019, Maharashtra, IN
Source
Journal of Surface Science and Technology, Vol 36, No 3-4 (2020), Pagination: 89–101Abstract
This work proposes to tackle the problem of heavy metal contamination of water, using adsorption phenomenon. We have tried to enhance the adsorptive cadmium uptake capacity of activated carbon by modifying its surface with the surfactant - Alpha olefin sulfonate. The effect of contact time and the initial concentration on the adsorption process has been determined. Study of the cadmium uptake by both the unmodified and surfactant modified carbon, with the adsorption data fitted to adsorption isotherms, showed the cadmium uptake capacity of the surfactant modified activated carbon to have enhanced two-fold over the unmodified activated carbon.Keywords
Activated Carbon, Alpha Olefin Sulfonate, Cadmium, Surfactant Modified Activated Carbon.References
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- Synthesis, Surface Active Properties and Antimicrobial Activity of Novel Ester – Amidoamine Linked Double Tailed Cationic Surfactants
Abstract Views :144 |
PDF Views:2
Authors
Affiliations
1 Department of Chemical Engineering, Institute of Chemical Technology, Mumbai – 400019, Maharashtra, IN
1 Department of Chemical Engineering, Institute of Chemical Technology, Mumbai – 400019, Maharashtra, IN
Source
Journal of Surface Science and Technology, Vol 37, No 3-4 (2021), Pagination: 141-157Abstract
Three novel ester-amidoamine linked cationic surfactants bearing a double tail were synthesized. Their chemical structures were interpreted with FTIR, 1H and 13C NMR spectroscopy. These surfactants consist of hydrophobes that may be obtained from sustainable resources. The objective was to synthesize a double tailed amidoamine having two functional groups in the structure and to investigate the effect of these groups on the interfacial as well as physical properties of the surfactants. The interfacial properties of the surfactants were determined using tensiometry, conductometry measurements and dye solubilization techniques. The synthesized surfactants have been found to exhibit quite low CMC in comparison with conventional surfactants of similar structure. The effect of sodium chloride on their surface properties was also studied. They were found to possess good and stable foaming ability and wettability. All the synthesized surfactants delivered appreciable antimicrobial activity against three tested microorganisms, Staphylococcus aureus and Escherichia coli.Keywords
Double Tailed Ester-Amidoamine, Critical Micelle Concentration, Quaternization, Surfactant, Synthesis.References
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