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Synthesis and surface-active properties of a trisiloxane modified oligo(propylene oxide-block-ethylene oxide) wetting agent

Title
Synthesis and surface-active properties of a trisiloxane modified oligo(propylene oxide-block-ethylene oxide) wetting agent
Author
노시태
Keywords
hydrosilylation; surface tension; critical micelle concentration; wetting power; emulsion stability
Issue Date
2004-03
Publisher
JOHN WILEY & SONS INC
Citation
JOURNAL OF APPLIED POLYMER SCIENCE, v. 92, No. 5, Page. 3292-3302
Abstract
Polyclisperse 1,1,1,3,5,5,5-heptamethyltrisiloxane-oligo(propylene oxide-block-ethylene oxide) wetting agents were synthesized through the hydrosilylation of 1,1,1,3,5,5,5-heptamethyltrisiloxane (HMTS) with active hydrogen and allyl oligo(propylene oxide-block-ethylene oxide) [allyl oligo(PO-b-EO)] with hexachloro dihydrogen platinate(IV) as a catalyst. Allyl oligo(PO-b-EO) with a hydrophilic- hydrophobic balance was synthesized through the combination of propylene oxide (PO) and ethylene oxide with allyl alcohol. The wetting agents with a hydrophilic-hydrophobic balance were synthesized. The aqueous solutions of the wetting agents (0.1 wt %) were almost visibly turbid. An increase in the number of hydrophobic groups of HMTS and PO for the wetting agents resulted in a lower critical solution temperature. Lower surface tensions of 20-25 dyn/cm were found above the critical micelle concentration (cmc), and they decreased with an increase in the number of hydrophobic groups. The cmcs were below 0.01 wt %, decreasing with as the number of hydrophobic groups increased. The wetting power and emulsion stability for the oil-in-water systems increased as the concentration of the wetting agents increased, and they decreased as the number of hydrophobic groups increased.
URI
https://onlinelibrary.wiley.com/doi/abs/10.1002%2Fapp.20284https://repository.hanyang.ac.kr/handle/20.500.11754/151014
ISSN
0021-8995
DOI
10.1002/app.20284
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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