International Journal For Multidisciplinary Research

E-ISSN: 2582-2160   •   Impact Factor: 9.24

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Volume 8 Issue 2
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Impact of Alkali Treatment on Physical and Chromatic Properties of Reactive Dyed Coir Fiber”

Author(s) Ms. SHIVANI NAVNITBHAI MACHHI, Dr. KEVAL J. UMRIGAR, Dr. SHAILESH R. SHAH
Country India
Abstract Coir fibre, a lignocellulosic natural fibre derived from coconut husk, exhibits high durability but limited dyeability due to the presence of lignin and surface impurities. This study investigates the impact of alkali treatment on the physical and chromatic properties of coir fibre dyed with reactive dyes. Alkali treatment using sodium hydroxide (NaOH) was carried out at varying concentrations to modify the fibre surface by removing lignin, hemicellulose, and waxy substances. The treated fibres were subsequently dyed with reactive dyes under controlled conditions. Physical properties such as tensile strength, elongation, and surface morphology were evaluated, along with chromatic parameters including colour strength (K/S), CIELAB values, and fastness properties. The results indicate that alkali treatment significantly enhances dye uptake and colour strength due to increased fibre porosity and improved accessibility of hydroxyl groups. However, excessive alkali concentration adversely affects mechanical strength. The study demonstrates that optimized alkali treatment improves both dyeability and aesthetic properties of coir fibre, making it suitable for value-added textile applications.
Keywords Coir fibre; Alkali treatment; Reactive dyeing; Colour strength; Surface modification
Published In Volume 8, Issue 2, March-April 2026
Published On 2026-04-16
DOI https://doi.org/10.36948/ijfmr.2026.v08i02.74864
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