Influence of Ultraviolet Irradiation and Protease on Scale Structure of Alpaca Wool Fibers

Open access


The present research aimed to explore the influence of different felt-proofing methods on alpaca fibers’ scale structure. Dyed alpaca fibers were exposed to a particular wavelength of ultraviolet (UV) light for different periods and treated with protease to analyze the felt property and compare with untreated fibers. Experimental results have shown that alpaca fibers have better shrinkage resistance and dyeability after being exposed to UV light, whereas no recognizable change was obtained on the surface of alpaca fibers’ scale structure by scanning electron microscopy (SEM). In contrary, enzyme-treated alpaca fibers revealed improved dye rate and resistance to shrinkage. Especially, damaged scales on many areas of fiber surface were appeared by SEM, which indicates that UV may have a positive effect on enzyme treatment by damaging alpaca fibers’ surface structure and promoting the amount of protease going into the fibers’ inner layers. Therefore, eventually a better shrinkage resistance was obtained.

[1] Memon, H., Wang, H., Langat, E. (2018). Determination and characterization of the wool fiber yield of Kenyan sheep breeds: an economically sustainable practical approach for Kenya. Fibers, 6(3), 1-12.

[2] Khoso, A., Memon, H., Hussain, M., Sanbhal, N., et. al. (2016). Production and Characterization of Wool and Hair Fibers in Highlands of Baluchistan, an Economic and Sustainable Approach for Pakistan. Key Engineering Materials. 671, 473-482.

[3] Dooley, W. H. Textiles for commercial, industrial, and domestic arts schools: also adapted to those engaged in wholesale and retail dry goods, wool, cotton, and dressmaker’s trades: DC Heath, 1914.

[4] Atav, R., Turkmen, F. (2015). Investigation of the dyeing characteristics of alpaca fibers (Huacaya and Suri) in comparison with wool. Textile Research Journal, 85(13), 1331–1339

[5] Czaplicki, Z. (2012). Properties and structure of Polish alpaca wool. Fibres and Textiles in Eastern Europe,20(1, 90), 8–12.

[6] Dalton, J., Franck, R. R. (2001). Cashmere, camel hair and other hair fibres. In: Franck, R.R. (Ed.). Silk, Mohair, Cashmere and Other Luxury Fibers. Woodhead Publishing Ltd. (England).

[7] Wang, L., Lin, T., et. al. (2005). Frictional and tensile properties of conducting polymer coated wool and alpaca fibers. Fibers and Polymers, 6, 259-262.

[8] Liu, X., Wang, L., Wang, X. (2004). Resistance to compression behavior of alpaca and wool. Textile research journal, 74 (3), 265-270.

[9] Liu, X., Wang, L., Wang, X. (2004). Evaluating the softness of animal fibers. Textile Research Journal, 74(6), 535-538.

[10] Czaplicki, Z., Ruszkowski, K. (2014). Optimization of scouring alpaca wool by ultrasonic technique. Journal of Natural Fibers, 11(2), 169-183.

[11] Valbonesi, A., Cristofanelli, S., Pierdominici, F., Gonzales, M., Antonini, M. (2010). Comparison of fiber and cuticular attributes of alpaca and llama fleeces. Textile Research Journal, 80(4), 344-353.

[12] Jacobsen, M., Dhingra, R., Postle, R. (1992). A psychophysical evaluation of the tactile qualities of hand knitting yarns. Textile Research Journal, 62(10), 557-566.

[13] Czaplicki, Z., Mikołajczyk, Z., Prążyńska, A. (2018). Analysis of functional properties of knitted fabrics made of alpaca wool and other fibres. Fibres & Textiles in Eastern Europe, 26(3), 52-59.

[14] Galaska, M. L., Sqrow, L. D., Wolf, J. D., Morgan, A. B. (2019). Flammability Characteristics of Animal Fibers: Single Breed Wools, Alpaca/Wool, and Llama/Wool Blends. Fibers, 7(1),1-20.

[15] Makinson, K. R. (1975). Surface Properties of Wool Fibers. In: Schick, M.(Ed.). Surface Characteristics of Fibers and Textiles, Part 1 (0th edition). Marcel Dekker Inc (New York and Basel).

[16] Okada, M., Kimura, Y., Joko, K. (2010). Morphological analysis of shrinkproof wool fibers by SEM combined with alkaline and enzymatic etching techniques: microstructural differences of DCCA- and Kroy-processed fibers. Sent Gakkaishi, 66(5), 131-139.

[17] Hassan, M. M., Carr, C. M. (2019). A review of the sustainable methods in imparting shrink resistance to wool fabrics. Journal of Advanced Research, 18, 39-60.

[18] Baird, K., Foulds, R. A. (1968). Felting shrinkage of plain-knitted wool fabrics: Its dependence upon fabric structure and shrinkproofing level. Textile Research Journal, 38(7), 743-753.

[19] Sabatini, F., Nacci, T., Degano, I., Colombini, M. P. (2018). Investigating the composition and degradation of wool through EGA/MS and Py-GC/MS. Journal of Analytical and Applied Pyrolysis, 135, 111-121.

[20] Asquith, R. S., Rivett, D. E. (1959). The Photolysis of Tyrosine and its Possible Relationship to the Yellowing of Wool. Textile Research Journal, 39(7), 633-637.

[21] Memon, H., Wang, H., Yasin S., Halepoto, A. (2018). Influence of Incorporating Silver Nanoparticles in Protease Treatment on Fiber Friction, Antistatic, and Antibacterial Properties of Wool Fibers. Journal of Chemistry, 2018, 4845687, 1-8. doi:10.1155/2018/4845687.

[22] Wang, H., Memon, S., Memon, H. (2018). Kenyan Wool Fiber Properties Sampled from Different Sheep Body Parts. Journal of Donghua University (English Edition), 35(6), 503-508.

Autex Research Journal

The Journal of Association of Universities for Textiles (AUTEX)

Journal Information

IMPACT FACTOR 2018: 0.927
5-year IMPACT FACTOR: 1,016

CiteScore 2018: 1.21

SCImago Journal Rank (SJR) 2018: 0.395
Source Normalized Impact per Paper (SNIP) 2018: 1.044


All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 21 21 13
PDF Downloads 16 16 11