Surface Active Properties and LCST Behavior of Oligo(propylene oxide-block-ethylene oxide) Allyl Ether Siloxane Surfactants in Aqueous Solution
- Title
- Surface Active Properties and LCST Behavior of Oligo(propylene oxide-block-ethylene oxide) Allyl Ether Siloxane Surfactants in Aqueous Solution
- Author
- 노시태
- Keywords
- Polydisperse oligo(PO-b-EO) allyl ether siloxane surfactants; Surface tension; Surface arrangement; Hydrolysis; Cp values
- Issue Date
- 2004-08
- Publisher
- Korean Chemical Society
- Citation
- Bulletin of the Korean Chemical Societ, v. 25, No. 8, Page. 1182-1188
- Abstract
- Polydisperse oligo(PO-b-EO) allyl ether siloxane surfactants were synthesized by the hydrosilylation reaction
of OMTS with Allyl-oligo(PO-b-EO) series. The surface tension of siloxane surfactants increased with
increasing the EO chain length while it decreased with increasing the PO ratio. However, the sedimentation
time of the aqueous solution showed opposite trend to the surface tension data. Both the surface tension and
sedimentation time of the aqueous solution containing inorganic electrolyte gradually decreased as the content
of inorganic electrolyte increased because of the surface arrangement of surfactant molecules. However, they
increased with an increase of pH values due to the hydrolysis of the siloxane backbone. The Cp values tendedto
increase with the increase in the EO chain length and decrease of the PO ratio. It seems that intermolecular
interaction between PO/EO block copolymer and water affects the variation of transition temperature.
- URI
- http://ocean.kisti.re.kr/downfile/volume/chemical/JCGMCS/2004/v25n8/JCGMCS_2004_v25n8_1182.pdfhttps://repository.hanyang.ac.kr/handle/20.500.11754/151652
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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