Oleate Ester-Derived Nonionic Surfactants: Synthesis and Cloud Point Behaviour Studies
The synthesis and cloud point behavior of high oleate ester-derived nonionic surfactants are now reported. The effect of various polyethoxylate chain lengths (polyethylene glycol with 7, 11 and 16Â units of ethylene oxide (EO) monomer) as the surfactant's hydrophilic head on the cloud point wa...
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my.utp.eprints.105862013-12-16T23:48:23Z Oleate Ester-Derived Nonionic Surfactants: Synthesis and Cloud Point Behaviour Studies Mushtaq, Muhammad Tan, Isa M. Ismail, Lukman Lee, Susan Y. C Nadeem, M. Sagir, M. The synthesis and cloud point behavior of high oleate ester-derived nonionic surfactants are now reported. The effect of various polyethoxylate chain lengths (polyethylene glycol with 7, 11 and 16 units of ethylene oxide (EO) monomer) as the surfactant's hydrophilic head on the cloud point was investigated. The effect of varying amounts of sodium chloride and five different ionic surfactants on the cloud points of the synthesized nonionic surfactants were also presented. When the chain length of polyethoxylate increased, the cloud point of the synthesized nonionic surfactant also increased, ranging from 16, 43 and 64°C for 7, 11 and 16 EO units respectively. Increments in sodium chloride concentration depressed the cloud point values of the synthesized nonionic surfactants linearly. The addition of ionic surfactants elevated the cloud points of the synthesized nonionic surfactant. However, in the presence of sodium chloride, the cloud point of the mixed ionic-nonionic solution was suppressed and anincrease in ionic surfactant concentration was required to elevate the cloud point. It was also found that the cloud points of synthesized surfactants can be raised up to 95°C in the presence of 4 wt. NaCl solution. 2013 Article PeerReviewed http://www.tandfonline.com/doi/abs/10.1080/01932691.2013.783492 Mushtaq, Muhammad and Tan, Isa M. and Ismail, Lukman and Lee, Susan Y. C and Nadeem, M. and Sagir, M. (2013) Oleate Ester-Derived Nonionic Surfactants: Synthesis and Cloud Point Behaviour Studies. Journal of Dispersion Science and Technology (ja). null. (In Press) http://eprints.utp.edu.my/10586/ |
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The synthesis and cloud point behavior of high oleate ester-derived nonionic surfactants are now reported. The effect of various polyethoxylate chain lengths (polyethylene glycol with 7, 11 and 16 units of ethylene oxide (EO) monomer) as the surfactant's hydrophilic head on the cloud point was investigated. The effect of varying amounts of sodium chloride and five different ionic surfactants on the cloud points of the synthesized nonionic surfactants were also presented. When the chain length of polyethoxylate increased, the cloud point of the synthesized nonionic surfactant also increased, ranging from 16, 43 and 64°C for 7, 11 and 16 EO units respectively. Increments in sodium chloride concentration depressed the cloud point values of the synthesized nonionic surfactants linearly. The addition of ionic surfactants elevated the cloud points of the synthesized nonionic surfactant. However, in the presence of sodium chloride, the cloud point of the mixed ionic-nonionic solution was suppressed and anincrease in ionic surfactant concentration was required to elevate the cloud point. It was also found that the cloud points of synthesized surfactants can be raised up to 95°C in the presence of 4 wt. NaCl solution. |
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Article |
author |
Mushtaq, Muhammad Tan, Isa M. Ismail, Lukman Lee, Susan Y. C Nadeem, M. Sagir, M. |
spellingShingle |
Mushtaq, Muhammad Tan, Isa M. Ismail, Lukman Lee, Susan Y. C Nadeem, M. Sagir, M. Oleate Ester-Derived Nonionic Surfactants: Synthesis and Cloud Point Behaviour Studies |
author_facet |
Mushtaq, Muhammad Tan, Isa M. Ismail, Lukman Lee, Susan Y. C Nadeem, M. Sagir, M. |
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Mushtaq, Muhammad |
title |
Oleate Ester-Derived Nonionic Surfactants: Synthesis and Cloud Point Behaviour Studies |
title_short |
Oleate Ester-Derived Nonionic Surfactants: Synthesis and Cloud Point Behaviour Studies |
title_full |
Oleate Ester-Derived Nonionic Surfactants: Synthesis and Cloud Point Behaviour Studies |
title_fullStr |
Oleate Ester-Derived Nonionic Surfactants: Synthesis and Cloud Point Behaviour Studies |
title_full_unstemmed |
Oleate Ester-Derived Nonionic Surfactants: Synthesis and Cloud Point Behaviour Studies |
title_sort |
oleate ester-derived nonionic surfactants: synthesis and cloud point behaviour studies |
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2013 |
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http://www.tandfonline.com/doi/abs/10.1080/01932691.2013.783492 http://eprints.utp.edu.my/10586/ |
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1738655874727018496 |
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13.160551 |