Distribution of surfactants in latex films: A Rutherford backscattering study

被引：23
|
作者：
Lee, Wai Peng
Gundabala, Venkata R.
Akpa, Belinda S.
Johns, Michael L.
Jeynes, Chris
Routh, Alexander F.
机构：
[1] Univ Sheffield, Dept Chem Engn, Sheffield S1 3JD, S Yorkshire, England
[2] Univ Cambridge, Dept Chem Engn, Cambridge CB2 3RA, England
[3] Univ Surrey, Ion Beam Ctr, Guildford GU2 7XH, Surrey, England
来源：
LANGMUIR | 2006年 / 22卷 / 12期
基金：
英国工程与自然科学研究理事会;
关键词：
D O I：
10.1021/la0601760
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Uneven distribution of surfactant in dried latex films can affect the final film properties such as its water-resistance, gloss, and adhesiveness. Therefore, it is important to understand the driving force for surfactant transport during drying. In this paper, the accumulation of surfactant on the surface of poly(styrene-co-butyl acrylate) latex is studied using Rutherford Backscattering (RBS) and compared with results from a model that is based on the diffusive transport of particles and surfactant. Experimentally, a 30-50 nm thick surface layer, rich in surfactant, is seen and the concentration in the bulk of the film, obtained from RBS, agrees, at least qualitatively, with the model predictions for two of the surfactants tested.
引用
收藏
页码：5314 / 5320
页数：7
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