TY - JOUR
T1 - Cellulose-nanofiber/polygalacturonic acid coatings with high oxygen barrier and targeted release properties
AU - Mølgaard, Susanne L.
AU - Henriksson, Marielle
AU - Cardenas Gomez, Marite
AU - Svagan, Anna J.
N1 - Copyright © 2014 Elsevier Ltd. All rights reserved.
PY - 2014/12/19
Y1 - 2014/12/19
N2 - A bio-inspired coating consisting of pectin (polygalacturonic acid) and cationic cellulose nanofibers were successfully produced by the layer-by-layer method. The build-up and the morphology of the resulting coatings were studied with spectroscopic ellipsometry and atomic force microscopy, respectively. The coating was able to survive the exposure of a simulated gastric fluid, but was partially degraded upon exposure to pectinase enzyme, which simulate the action of the microbial symbionts present in the human colon. Prior to exposure, the oxygen permeability coefficient of the coating (0.033ml(STP)mmm(-2)day(-1)atm(-1) at 23°C and 20% RH) was in the same order of magnitude as for ethylene vinyl alcohol films (0.001-0.01ml(STP)mmm(-2)day(-1)atm(-1)). However, after exposure to the mimicked gastrointestinal (GI) tract conditions, the contribution of coating to the overall barrier properties was not measurable.
AB - A bio-inspired coating consisting of pectin (polygalacturonic acid) and cationic cellulose nanofibers were successfully produced by the layer-by-layer method. The build-up and the morphology of the resulting coatings were studied with spectroscopic ellipsometry and atomic force microscopy, respectively. The coating was able to survive the exposure of a simulated gastric fluid, but was partially degraded upon exposure to pectinase enzyme, which simulate the action of the microbial symbionts present in the human colon. Prior to exposure, the oxygen permeability coefficient of the coating (0.033ml(STP)mmm(-2)day(-1)atm(-1) at 23°C and 20% RH) was in the same order of magnitude as for ethylene vinyl alcohol films (0.001-0.01ml(STP)mmm(-2)day(-1)atm(-1)). However, after exposure to the mimicked gastrointestinal (GI) tract conditions, the contribution of coating to the overall barrier properties was not measurable.
U2 - 10.1016/j.carbpol.2014.08.011
DO - 10.1016/j.carbpol.2014.08.011
M3 - Journal article
C2 - 25263879
SN - 0144-8617
VL - 114
SP - 179
EP - 182
JO - Carbohydrate Polymers
JF - Carbohydrate Polymers
ER -