Real-time optical monitoring of the dip coating process

Alexandre F. Michels; T. Menegotto; Hans-Peter P. Grieneisen; C. V. Santilli; S. H. Pulcinelli; Flavio Horowitz

doi:10.1117/12.590759

21 October 2004 Real-time optical monitoring of the dip coating process

Alexandre F. Michels, T. Menegotto, Hans-Peter P. Grieneisen, C. V. Santilli, S. H. Pulcinelli, Flavio Horowitz

Proceedings Volume 5622, 5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications; (2004) https://doi.org/10.1117/12.590759
Event: 5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications, 2004, Porlamar, Venezuela

Abstract

A significant part of film production by the coating industry is based on wet bench processes, where better understanding of their temporal dynamics could facilitate control and optimization. In this work, in situ laser interferometry is applied to study properties of flowing liquids and quantitatively monitor the dip coating batch process. Two oil standards -- Newtonian, non-volatile, with constant refractive indices and distinct flow properties -- were measured under several withdrawing speeds. The dynamics of film physical thickness then depends on time as t^-1/2, and flow characterization becomes possible with high precision (linear slope uncertainty of ±0.04%). Resulting kinematic viscosities for OP60 and OP400 are 1,17 ± 0,03 St and 9,9 ± 0,2 St, respectively. These results agree with nominal values, as provided by the manufacturer. For more complex films (a mutli-component sol-gel Zirconyl Chloride aqueous solution) with a varying refractive index, through a direct polarimetric measurement, allowing also determination of the temporal evolution of physical thickness (uncertainty of ± 0,007 microns) is also determined during dip coating.

Citation Download Citation

Alexandre F. Michels, T. Menegotto, Hans-Peter P. Grieneisen, C. V. Santilli, S. H. Pulcinelli, and Flavio Horowitz "Real-time optical monitoring of the dip coating process", Proc. SPIE 5622, 5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications, (21 October 2004); https://doi.org/10.1117/12.590759

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Coating

Refractive index

Liquids

Kinematics

Minerals

Calcium

Interferometry

Show All Keywords

Keywords/Phrases

Search In:

Publication Years