WFRF:(Palazzo F)
Search: WFRF:(Palazzo F) > Phase behavior of t...
- 42 of 52
- Previous record
- Next record
- To hitlist
- Angelico, R (author)
Phase behavior of the lecithin/water/isooctane and lecithin/water/decane systems
- Article/chapterEnglish2004
Publisher, publication year, extent ...
- 2003-12-23
- American Chemical Society (ACS),2004
Numbers
- LIBRIS-ID:oai:lup.lub.lu.se:e872a90c-6918-4352-99e6-13e0f7955ce8
- https://lup.lub.lu.se/record/153885URI
- https://doi.org/10.1021/la035603dDOI
Supplementary language notes
- Language:English
- Summary in:English
Part of subdatabase
- SwePubSwePub
Classification
Notes
- The isothermal pseudo-ternary-phase diagram was determined at 25 degreesC for systems composed of lecithin, water, and, as oil, either isooctane or decane. This was accomplished by a combination of polarizing microscopy, small-angle X-ray scattering, and NMR techniques. The lecithin-rich region of the phase diagram is dominated by a lamellar liquid-crystalline phase (L-alpha). For lecithin contents less than 60% and low hydration (mole ratio water/lecithin = W-0 < 5.5), the system forms a viscous gel of branched cylindrical reverse micelles. With increase in the water content, the system phase separates into two phases, which is either gel in equilibrium with essentially pure isooctane (for lecithin < 25%) or a gel in equilibrium with L-alpha, (for lecithin > 25%). These two-phase regions are very thin with respect to water dilution. For 8 < W-0 < 54 very stable water-in-oil emulsions form. It is only after ripening for more than I year that the large region occupied by the emulsion reveals a complex pattern of stable phases. Moving along water dilution lines, one finds (i) the coexistence of gel, isooctane and L-alpha,(ii) equilibrium between reverse micelles and spherulites, and, finally, (iii) disconnected reverse micelles that fail to solubilize water for W-0 > 54. This results in a Winsor II phase equilibrium at low lecithin content, while for lecithin > 20% the neat water is in equilibrium with a reverse hexagonal phase and an isotropic liquid-crystalline phase. The use of the decane as oil does not change the main features of the phase behavior.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
- Ceglie, A (author)
- Colafemmina, G (author)
- Delfine, F (author)
- Olsson, UlfLund University,Lunds universitet,Fysikalisk kemi,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Physical Chemistry,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)fk1-uol (author)
- Palazzo, G (author)
- Fysikalisk kemiEnheten för fysikalisk och teoretisk kemi (creator_code:org_t)
Related titles
- In:Langmuir: American Chemical Society (ACS)20:3, s. 619-6310743-74631520-5827
Internet link
- 42 of 52
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- Angelico, R
- Ceglie, A
- Colafemmina, G
- Delfine, F
- Olsson, Ulf
- Palazzo, G
- About the subject
-
- NATURAL SCIENCES
- NATURAL SCIENCES
- and Chemical Science ...
- and Physical Chemist ...
- Articles in the publication
- Langmuir
- By the university
- Lund University
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
