Abstract
The structure of a simple O/W cream and its separate components were investigated by differential scanning calorimetry. The results obtained for cetylstearylalcohol agree with those cited in literature. The thermal behaviour of the component poly(oxyethylene)20 glycerolmonostearate (= PGM20) was also investigated. It is pointed out that the thermal history of the PGM20 batch may play an important role in a study concerning the structure of this surfactant. To both components water was added to study the effects of hydration. Hydration affected the transition temperatures of either component. The melting enthalpy per unit mass of cetylstearylalcohol was not influenced, in contrast with the melting enthalpy of the hydrocarbon fraction in PGM20/water mixtures. It is supposed that hydration induces a tilt of the hydrocarbon chains with respect to the lattice plane in lamellar PGM20/water mixtures. Cooling experiments indicated that, in samples containing sufficient water, 2 water molecules were tightly bound to the polyoxyethylene chains of the surfactant. The properties of simple creams containing cetylstearylalcohol, PGM20 and water can be explained regarding their structure and considering the behaviour of the separate components.
Article PDF
Similar content being viewed by others
Explore related subjects
Discover the latest articles, news and stories from top researchers in related subjects.Avoid common mistakes on your manuscript.
References
De Vringer T, Joosten JGH, Junginger HE (1984) Coll & Polym Sci 262:56
Deutscher Arzneimittel Codex (1979) 1 Ergänzung 81
De Vringer T, Joosten JGH, Junginger HE, Coll & Polym Sci, proceeding paper
Beer AH (1980) Untersuchungen über das Phasenverhalten normaler langkettiger Alkohole und deren Zweikomponentengemische, Dissertation, Technische Universität Braunschweig
Junginger HE, Führer C, Ziegenmeyer J, Friberg S (1979) J Soc Cosmet Chem 30:9
Precht D (1974) Kiel Milchwirtsch Forschungsber 26:221
Hager SL, Macrury TB (1980) J Appl Polym Sci 25:1559
Altmeyer A, Veit-Holger K, Ueberreiter K (1981) Makromol Chem 182:3311
Martindale (1979) The Extra Pharmacopoeia 27th ed, The Pharmaceutical Press, London, p 630
Fischer G (1977) Untersuchungen über die kolloidchemische Struktur der Polyäthylenglykolsalbe, Dissertation, Technische Universität Braunschweig
Dorset DL (1983) J Coll Int Sci 96:172
Boddé HE, De Vringer T, Junginger HE, Coll & Polym Sci, in press
Author information
Authors and Affiliations
Additional information
Dedicated to Prof. Dr. Elsa Ullmann on the occasion of her 75th anniversary.
Rights and permissions
About this article
Cite this article
de Vringer, T., Joosten, J.G.H. & Junginger, H.E. A study of the gel structure in a nonionic O/W cream by differential scanning calorimetry. Colloid & Polymer Sci 264, 691–700 (1986). https://doi.org/10.1007/BF01469530
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01469530