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Enhancing Breathability of Bio-polyurethane Membrane Films by Hybridizing Them with TiO2
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  • Journal title : Textile Science and Engineering
  • Volume 53, Issue 2,  2016, pp.83-90
  • Publisher : The Korean Fiber Society
  • DOI : 10.12772/TSE.2016.53.083
 Title & Authors
Enhancing Breathability of Bio-polyurethane Membrane Films by Hybridizing Them with TiO2
Kang, Seung-Gu; Kang, Goo; Kwak, Nam Ho; Jin, Hojin; Hong, Seong Hyun; Joo, Il Jung; Kwon, Oh Kyung; Min, Byung Gil;
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The aim of this work was to enhance the water vapor permeability of bio-polyurethane thin film, whose essential application is as a non-microporous type of film in breathable fabrics, by hybridizing it with nano- and micro-sized titania (). The bio-polyurethanes were synthesized from 4,4-diphenylmethane diisocyanate (MDI) and a polyol mixture containing polyethylene glycol (PEG) and soybean oil-based polyol, that is, bio-glycols by the hydroxylation of soybean oils upto 25% by weight of bio-polyurethane. We studied the effect of hybridizing the bio-polyurethane films with hydrophilic nano- or micro-sized on their breathability by measuring the water contact angle and the water vapor permeability of the films; it was found to significantly enhance the permeability of the bio-polyurethane film. Further, nano- was more effective than micro- due to the higher surface area resulting from nano particles. On the other hand, it is expected that it would be possible to provide additive functionality to the bio-PU membranes due to photocatalytic effect of nano-.
bio-polyurethane;nano-titania;hybrid film;breathable film;contact angle;permeability;
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