The influence of nanofiller shape and nature on the functional properties of waterborne poly(urethane-urea) nanocomposite films

0531942 - ÚMCH 2021 RIV CH eng J - Journal Article
Špírková, Milena - Hodan, Jiří - Konefal, Rafal - Machová, Luďka - Němeček, Pavel - Paruzel, Aleksandra
The influence of nanofiller shape and nature on the functional properties of waterborne poly(urethane-urea) nanocomposite films.
Polymers. Roč. 12, č. 9 (2020), s. 1-18, č. článku 2001. E-ISSN 2073-4360
R&D Projects: GA ČR(CZ) GA18-03932S
Institutional support: RVO:61389013
Keywords : waterborne poly(urethane-urea) dispersion * nanocomposite * film
OECD category: Polymer science
Impact factor: 4.329, year: 2020
Method of publishing: Open access
https://www.mdpi.com/2073-4360/12/9/2001

A series of waterborne polycarbonate-based poly(urethane-urea) nanocomposite films were prepared and characterized. An isocyanate excess of 30 mol% with respect to the hydroxyl groups was used in the procedure, omitting the chain-extension step of the acetone process in the dispersion preparation. The individual steps of the synthesis of the poly(urethane-urea) matrix were followed by nuclear magnetic resonance (NMR) spectroscopy. The nanofillers (1 wt% in the final nanocomposite) differed in nature and shape. Starch, graphene oxide and nanocellulose were used as representatives of organic nanofillers, while halloysite, montmorillonite, nanosilica and hydroxyapatite were used as representatives of inorganic nanofillers. Moreover, the fillers differed in their shape and average particle size. The films were characterized by a set of methods to obtain the tensile, thermal and surface properties of the nanocomposites as well as the internal arrangement of the nanoparticles in the nanocomposite film. The degradation process was evaluated at 37 °C in a H2O2 + CoCl2 solution.
Permanent Link: http://hdl.handle.net/11104/0312248