Laser Monitoring of Non-Newtonian Liquids During Dip Coating

被引：3

作者：

Michels, Alexandre F. ^{[1
]}

Lovato, Pedro ^{[2
]}

Horowitz, Flavio ^{[2
]}

机构：

[1] Univ Caxias do Sul, Ctr Ciencias Exatas & Tecnol, BR-95070050 Caxias Do Sul, RS, Brazil

[2] Univ Fed Rio Grande do Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil

来源：

AICHE JOURNAL | 2009年 / 55卷 / 12期

关键词：

coating flows; fluid mechanics; optics; process control; VARYING REFRACTIVE-INDEX; FLAT PLATES; VERTICAL SURFACE; SOL-GEL; WITHDRAWAL; FLUIDS; FILMS;

D O I：

10.1002/aic.11834

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Dip coated films, widely used in the coating industry, are usually measured by capacitive methods with micrometric precision. In this work, interferometric determination of thickness evolution in real time, for the first time to our best knowledge, is applied to volatile non-Newtonian liquids with several viscosities and distinct dip withdrawing speeds. Thickness evolution during the process depends on time as predicted by a power law model. Comparison with measured results (uncertainty of +/- 0.007 mu m) showed very good agreement after initial steps of the process. (C) 2009 American Institute of Chemical Engineers AIChE J, 55: 3052-3055, 2009

引用

页码：3052 / 3055

页数：4

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