The Universal Attenuated Total Reflectance Fourier Transform Infrared (UATR-FTIR) equipped with a ZnSe-Diamond composite crystal allows collection of FTIR spectra directly on a sample without any special preparation. The instrument is equipped with a "pressure arm" which is used to apply a constant pressure to the cotton samples positioned on top of the ZnSe-Diamond crystal to ensure a good contact between the sample and the incident IR beam and prevent the loss of the IR beam. The amount of pressure applied is monitored by the Perkin-Elmer FTIR software. In this chapter a review of applications of the FTIR to study cotton fibers. The UATR-FTIR is used to investigate the structural changes that occur during the different developmental stages of cotton fibers from fibers initiation to maturity. The UATR-FTIR is used also to analyze contaminated cotton fibers. In this case, the Principal Component Analysis of the FTIR spectra showed that it is possible to discriminate between contaminated and non-contaminated cotton. The results obtained showed that the ZnSe-Diamond composite crystal FTIR accessory could be used as a fast and precise nondestructive method to discriminate between contaminated and non-contaminated cotton. Furthermore, the UATR-FTIR is routinely used to investigate the cellulose chemical functionalization to impart different properties to cotton fabric.
|Title of host publication||Fourier Transform Infrared Spectroscopy|
|Subtitle of host publication||Developments, Techniques and Applications|
|Publisher||Nova Science Publishers, Inc.|
|Number of pages||20|
|State||Published - Feb 2011|