Hydrophobic Coating on Cellulosic Textile Material by Betulin and a Betulin Based Polymer
Independent thesis Advanced level (degree of Master (Two Years)), 80 credits / 120 HE creditsStudent thesis
Betulin is a naturally abundant compound in the outer bark of birch and can be easily
obtained by solvent extraction. Herein, solutions of betulin were used to treat cellulosic
textile fibers and improve their water repellency. Cotton fabrics impregnated in a 7.5 g
L-1 solution of betulin in ethanol showed the highest water contact angle of about 153°
while the impregnation in a 3.75 g L-1 solution resulted in a close effect. A terephthaloyl
chloride-betulin copolymer was synthesized and dissolved in tetrahydrofuran to afford a
solution with a concentration of 3.75 g L-1. The cotton fabric impregnated in this
solution showed a water contact angle of 150°. Changes in morphology of the cellulose
fibers before and after the treatment were observed by scanning electron microscopy,
and the water repellency was measured by a standard spray test. The marketing strategy
of the potential product, which will be developed based on this technique, was discussed.
Place, publisher, year, edition, pages
2016. , 22 p.
Betulin, biorefinery, cellulose, contact angle, copolymer, hydrophobicity, marketing strategy, standard spray test, textile fibers, water repellency.
Textile, Rubber and Polymeric Materials
IdentifiersURN: urn:nbn:se:lnu:diva-53446OAI: oai:DiVA.org:lnu-53446DiVA: diva2:936312
wood chemistry and pulp technology divison in KTH Royal Institute of Technology
Subject / course
Innovation through Business, Engineering and Design - Specialisation Business, Master Programme, 120 credits
2016-06-01, N2040, Linnaeus University, Växjö, 12:20 (English)
Ek, Monica, ProfessorLi, Dongfang, Doctor
Mahapatra, Krushna, Associate Professor