DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, Hui Chan | - |
dc.contributor.author | Kim, Jong-Duk | - |
dc.date.accessioned | 2011-09-09T01:09:03Z | - |
dc.date.available | 2011-09-09T01:09:03Z | - |
dc.date.issued | 2010-09-24 | - |
dc.identifier.citation | Journal of Colloid and Interface Science, Vol.352, pp.444-448 | en |
dc.identifier.issn | 0021-9797 | - |
dc.identifier.uri | http://hdl.handle.net/10203/25149 | - |
dc.description.abstract | The cloud points of aqueous solutions containing polyoxyethylene surfactant molecules with a distribution of chain lengths were studied for several nonionic surfactants. Experimentally, the cloud points increased as the oxyethylene chain lengths increased with a linear or logarithmic relation of the number of oxyethylates, as proposed by Schott. An experimental scale, the p Po scale, was previously developed to correspond to the cloud points, where p is the average number of oxyethylene units per molecule and Po is the shortest chain length reference. However, no previous prediction methods of cloud point addressed systems containing a range of chain lengths. In this work, we propose a rescaling of the representative chain length as s Po, where s is the cloud point-weighted mean ethylene oxide chain below p, and approximated as (p Po)/PDI where PDI is the polydispersity index. Using the rescaled length, the experimental data for C12Es (lauryl alcohol ethoxylate, LAE), NPE-10 (nonyl phenol ethoxylate) and TDE-10 (tridecyl alcohol ethoxylate) were successfully predicted with no additional parameters, such as {(p Po)/(PDI)}/CP = a + b{(p Po)/(PDI)}, where PDI indicates the Broadness of the chain length distribution. | en |
dc.description.sponsorship | The authors wish to thank for the BK program and we are grateful to Mr. Hong Ji Anh at Honam petrochemical for preparation of NRE samples. | en |
dc.language.iso | en_US | en |
dc.publisher | Elsevier | en |
dc.subject | Cloud point | en |
dc.subject | Polydispersity index | en |
dc.subject | Polyoxyethylene distribution | en |
dc.subject | Broadness | en |
dc.title | The polydispersity effect of distributed oxyethylene chains on the cloud points of nonionic surfactants | en |
dc.type | Article | en |
dc.identifier.doi | 10.1016/j.jcis.2010.08.078 | - |
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