温度对脱水山梨醇表面活性剂单分子层的影响。

The Effect of Temperature on Sorbitan Surfactant Monolayers.

作者信息

Peltonen Leena, Hirvonen Jouni, Yliruusi Jouko

机构信息

Department of Pharmacy, Pharmaceutical Technology Division, University of Helsinki, Helsinki, FIN-00014, Finland

出版信息

J Colloid Interface Sci. 2001 Jul 1;239(1):134-138. doi: 10.1006/jcis.2001.7520.

DOI:10.1006/jcis.2001.7520

PMID:11397057

Abstract

The effect of temperature on four sorbitan ester (Span 20, sorbitan monolaurate; Span 40, sorbitan monopalmitate; Span 60, sorbitan monostearate; and Span 80, sorbitan monooleate) monolayers was analyzed. The covered temperature range was from 22 to 42 degrees C. Surface pressure-molecular area isotherms were measured with a Langmuir-type instrument. As the temperature was increased, the monolayers expanded more. This change can also be seen from the surface compressional modulus that was lowered as the temperature was increased. Also, the collapse pressure was lowered as the temperature was increased. Copyright 2001 Academic Press.

摘要

分析了温度对四种山梨醇酐酯（司盘20，山梨醇酐单月桂酸酯；司盘40，山梨醇酐单棕榈酸酯；司盘60，山梨醇酐单硬脂酸酯；司盘80，山梨醇酐单油酸酯）单分子层的影响。覆盖的温度范围为22至42摄氏度。用朗缪尔型仪器测量表面压力-分子面积等温线。随着温度升高，单分子层膨胀得更多。这种变化也可以从表面压缩模量看出，表面压缩模量随着温度升高而降低。此外，随着温度升高，崩溃压力降低。版权所有2001年学术出版社。