Sidhu, Mehra SinghNeha2024-03-042024-03-042023Neha (2023). Parametric study of cotton fibres for quality assessment (Unpublished M.Sc. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.https://krishikosh.egranth.ac.in/handle/1/5810207323Cotton is a major cash crop of Punjab widely known as the 'White Gold'. In the current study, an attempt was made to analyze parametrically the physical, chemical, and molecular properties of single and compared with bulk cotton fibres, for cotton genotypes from Ludhiana (LDH) and Bathinda (BTD) regions of Punjab (LD 949 (desi cotton), F 2228, PAU Bt 2, and PAU Bt 3). The strength of the fibre was simulated using COMSOL multiphysics. The single fibre's diameter ranged from 12-20 m in both regions, while the diameter of LD949 was significantly higher. The length of LD 949 fibres‟ was lower (~6.0 ± 1.0 mm) than fibres of F 2228, PAU Bt 3 and PAU Bt 2 genotypes in both regions; evidently, this results in the higher micronaire quality value for desi cotton fibre led to lower spun/yarn quality. The average strength for single cotton fibres for LDH and BTD genotypes were about 2.2  0.1, and 2.1 0.11 MPa, respectively, comparable to bulk analysis. From XRD spectra of cotton fibres, peaks at 15, 16.5 and 23 degrees (2) was determined, corresponding to planes in the sample with Miller indices 1 ̅̅̅̅, 110, and 200. These indices indicate that the crystalline component is cellulose I, lying along the chain axis of the cotton fibre. The FTIR spectrum of cotton fibre showed the characteristic cellulose bands at 1056 cm-1, 1166 cm-1, 1432 cm-1, 1645 cm-1, 2899 cm-1, and 3300 cm-1. The simulated and experimentally estimated cotton fibre strength behaves non-linearly while stretching along the fibre axis, perhaps due to their multi-layered structure.EnglishThesis