Comparison of different coating techniques on the properties of FucoPol films.

Autor: Ferreira ARV; LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516, Caparica, Portugal. Electronic address: arf18913@campus.fct.unl.pt., Haapanen J; Department of Physics, Aerosol Physics Laboratory, Tampere University of Technology, P.O. Box 692, Tampere FI-33101, Finland. Electronic address: janne.haapanen@tut.fi., Mäkelä JM; Department of Physics, Aerosol Physics Laboratory, Tampere University of Technology, P.O. Box 692, Tampere FI-33101, Finland. Electronic address: jyrki.makela@tut.fi., Bratvold JE; Department of Chemistry, Centre for Materials Science and Nanotechnology (SMN), University of Oslo, P.O. Box 1033 Blindern, N-0315, Oslo, Norway. Electronic address: j.e.bratvold@kjemi.uio.no., Nilsen O; Department of Chemistry, Centre for Materials Science and Nanotechnology (SMN), University of Oslo, P.O. Box 1033 Blindern, N-0315, Oslo, Norway. Electronic address: ola.nilsen@kjemi.uio.no., Tuominen M; Chemistry, Materials and Surfaces, SP Technical Research Institute of Sweden, P.O. Box 5607, Stockholm SE-114 86, Sweden. Electronic address: Mikko.Tuominen@sp.se., Alves VD; LEAF-Linking Landscape, Environment, Agriculture and Food, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda 1349017, Lisboa, Portugal. Electronic address: vitoralves@isa.ulisboa.pt., Coelhoso IM; LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516, Caparica, Portugal. Electronic address: imrc@fct.unl.pt.
Jazyk: angličtina
Zdroj: International journal of biological macromolecules [Int J Biol Macromol] 2017 Oct; Vol. 103, pp. 268-274. Date of Electronic Publication: 2017 May 10.
DOI: 10.1016/j.ijbiomac.2017.05.021
Abstrakt: Plasma deposition, liquid flame spray (LFS) and atomic layer deposition (ALD) were used to form inorganic coatings in new exopolysaccharide (FucoPol) biodegradable films. Coated films were characterised in terms of surface, optical and barrier properties in order to evaluate their potential use in food packaging. FucoPol films presented dense and homogeneous surface with instant water contact angle of 95̊. Plasma deposition of perfluorohexane (PFH) on FucoPol surface has not shown significant improvement in the hydrophobic behaviour over the time. The FucoPol coating of SiO 2 nanoparticles deposited by LFS and plasma deposition of PFH have shown higher instant water contact angle (135°) caused by coating surface roughness, but this hydrophobic behaviour was not stable over time. FucoPol films coated only with TiO 2 deposited by ALD and combination of that with plasma deposition of PFH have shown stable water contact angle during time (90̊ and 115̊, respectively), transparency in the same order of magnitude and significantly lower permeability to water vapour (3.45×10 -11 mol/m s Pa and 3.45×10 -11 mol/m s Pa when compared to uncoated films with 5.32×10 -11 mol/m s Pa). Moreover, films coated with TiO 2 -PFH have also shown a permeability to oxygen of 1.70×10 -16 molm/m 2 sPa which is 67% lower than uncoated films.
(Copyright © 2017 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: