Chemical Modification of Indian Yak Fibre for Development of Jute/Yak Fibres Blended Warm Textile

Conference paper


Yak wool, an important speciality protein fibre, is mostly available in China, Mongolia and India. The yak fibre is commonly categorized into down or fine fibre, guard or coarser fibre and middle type fibre based on their fibre fineness. A large quantity of coarser yak fibre, which is quite stiffer and thicker, remains underutilized including its application in textile. In our work, the coarser grade black colour yak (fibre) wool of 9.3 tex was suitably chemically modified for blending with jute (ligno-cellulosic) fibre to develop blended textile with jute to yak fibres blend ratio of 25:75. After chemical modification, the coefficient of friction between the yak fibre and the metal was found to enhance to 0.368 from 0.280 in the unmodified hair sample, which is closer to the coefficient of friction of jute fibre. This facilitates in developing jute and yak fibres blended yarn with higher percentage of yak fibre content in the yarn. Indeed after modification, the natural black colour of yak fibre turned into a colour alike to ligno-cellulosic jute fibre with a marginal decrease in breaking load (12%) and linear density (16%). Scanning electron microscope (SEM) and EDX elemental analysis showed no detrimental changes in surface morphology and chemical composition of the yak wool after requisite chemical modification. Different fabrics were developed from the jute and yak wool blended un-dyed and dyed yarns. The jute–yak fibres (50:50) blended woven fabric of 385 g/m2 areal density showed a thermal insulation value of 1.4 (Tog).


Yak fibre Jute fibre EDX of hair Jute–yak fibres textile 


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© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.ICAR-National Institute of Natural Fibre Engineering and TechnologyKolkataIndia

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