文献类型：期刊文献

英文题名：Calculation of hydrophile-lipophile balance for polyethoxylated surfactants by group contribution method

作者：Guo, Xiaowen[1]; Rong, Zongming[1]; Ying, Xugen[1]

机构：[1]E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China

年份：2006

卷号：298

期号：1

起止页码：441

外文期刊名：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录：;EI(收录号：2006189859240);WOS:【SCI-EXPANDED(收录号:WOS:000237399600051)】；

语种：英文

外文关键词：HLB; group contribution method; polyethoxylated surfactants; effective chain length; Gamma PDF

摘要：Based on Davies' group contribution method, hydrophile-lipophile balance (HLB) values were calculated by effective chain length (ECL) instead of actual chain length of straight alkyl chain. polyoxyethylene (EO) chain, and polyoxypropylene (PO) chain. Linear equations were adopted for the effective chain length of straight alkyl chain and PO chain; a Gamma probability density function (PDF) was used to describe the contribution of each EO group to HLB and the effective chain length of EO chain Could be obtained by integrating Gamma PDF The HLB values of 224 nonionic surfactants were calculated and the average absolute error is less than 1.5, which is much better than the results obtained by Davies. (c) 2005 Elsevier Inc. All rights reserved.