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Determination of Polydimethylsiloxane on Cotton Fabrics Using Fourier Transform Attenuated Total Reflection Infrared Spectroscopy

Volume 39, Number 5 (Oct. 1985) Page 856-860

Murthy, R. S. Shreedhara; Leyden, D.E.; D'Alonzo, R.P.


Polydimethylsiloxane (PDMS) was chosen as a model siloxane molecule so a method could be developed for its quantification on cotton fabric with the use of ATR/FT-IR spectroscopy. PDMS is transferred onto an ATR crystal in the presence of methanol under pressure. This eliminates strong spectral interference from cellulose and improves precision. Methanol was needed to swell the fibers to release PDMS. The method is more sensitive, rapid, and nondestructive compared to extraction and transmission techniques.