Smart Water Vapour Permeability of Cellulose Nanowhisker Reinforced Thermo-moisture Responsive Polyurethane Nanocomposite Films

Korkmaz Memiş N. , Kaplan S.

8th International Istanbul Textile Conference, İstanbul, Turkey, 14 - 16 April 2018, vol.1, no.1, pp.1-6

  • Publication Type: Conference Paper / Full Text
  • Volume: 1
  • City: İstanbul
  • Country: Turkey
  • Page Numbers: pp.1-6


In this study, smart water vapour permeable films were produced by modification of commercially available thermal responsive SMPU with cellulose nanowhisker (CNW) reinforcement. Modification of SMPU which has a transition temperature suitable for
body applications was carried out by adding CNWs to possess moisture-sensitive water vapour permeability besides its thermal stimulation. This modification is an easier process than synthesis of a twin-switch shape memory polymer. Nanocomposite films with varying CNW concentrations (5, 10 and 20 wt. %) were produced by solution blending and casting methods in turn. Fourier Transform Infrared (FT-IR) Analysis was performed to characterize structure of nanocomposite films. Water vapour permeability and absorption capacity of the films were carried out under different thermal conditions (20, 40 and 65°C). According to FT-IR
results, peaks belonging to cellulose became visible in films with the increase of the CNW content. Smart water vapour permeability was observed for the produced films that permeability improved as the CNW concentration and temperature increased. Absorption capacity also had a similar trend. Summing up, produced SMPU nanocomposite films having both thermal and moisture induced water vapour permeability can be used in various forms for smart clothing (sports, protective, etc.) that adapts dynamic environmental and body physiological conditions.