Thumbnail Image

Thesis

Browse

20221
Reset filters
Subject: Clothing and Textiles × Author: Laimayum Jogeeta Devi × Start date: 2012 × Thesis Type: Ph.D ×
Reset filters

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    ThesisItemRestricted
    Development and application of moth-repellent finishes on proteinaceous fabrics using plant extracts
    (Punjab Agricultural University, Ludhiana, 2022) Laimayum Jogeeta Devi; Grewal, Sumeet
    The present study was conducted to develop the moth-repellent finishes for application on proteinaceous fabrics using plant sources as eco-friendly moth repellent agents. Four plants were selected, namely, lemongrass (Cymbopogon citratus), silver oak (Grevillea robusta), tulsi (Ocimum sanctum) and henna (Lawsonia inermis) on the basis of possessing effective insect repellency. Pure wool and silk fabrics were used for application of developed finishes. Active compounds from plant leaves were extracted using Soxhlet apparatus and conditions for extraction were optimized on the basis of percentage of yield on parameters, namely, types of solvents, extraction pH, solute to solvent ratio, extraction time and extraction temperature. Extraction was done using the optimized conditions of extraction for the respective plants. Phytochemical analysis, both qualitative and quantitative was conducted. Microcapsules were prepared using the optimized extracts as core material, sodium alginate as sheath material and citric acid as cross linker though simple coacervation technique. Parameters for application of microencapsulated finishes on wool and silk fabrics namely, concentrations of microcapsules, concentration of binders, curing temperature and curing time, were optimized on the basis of their effects on tensile strength, flexural rigidity and whiteness index. The microencapsulated extracts were applied on wool and silk fabrics using the optimized conditions using pad-dry-cure method. Surface morphology of the finished wool and silk fabrics were analyzed through Scanning Electron Microscopy. Physical properties of untreated control and finished fabrics were assessed It was found that the developed finishes did not have any adverse effect on the physical properties of the fabrics. Moth repellency of the finished fabrics were tested on the unwashed finished samples of both wool and silk fabrics using ISO 3998-1977(E). Using the same test, efficacy of the finishes were analyzed after washing the fabrics for 5, 10 and 15 wash cycles and after commercially dry cleaning. The test revealed that wool fabric finished with microcapsules of lemongrass extract showed the highest moth repellency with the lowest feeding damage followed by silver oak, tulsi and henna respectively. And silk fabrics finished with microcapsules of henna extract showed the highest moth repellency with the least feeding damage followed by lemongrass, silver oak and tulsi respectively. The finishes were also effective upto 15 washes and dry cleaning except for tulsi. Hence, the finishes prepared from the plant sources namely, lemongrass, silver oak, tulsi and henna can be successfully applied to proteinaceous fabrics to impart effective moth repellent property.