Improving the oxygen barrier of microcapsules using cellulose nanofibres

2021 ◽  
Author(s):  
Atisheel Kak ◽  
Ashutos Parhi ◽  
Barbara A. Rasco ◽  
Juming Tang ◽  
Shyam S. Sablani
Keyword(s):  
Oxygen Barrier ◽  
Cellulose Nanofibres

Highly proton conductive membranes based on carboxylated cellulose nanofibres and their performance in proton exchange membrane fuel cells

2019 ◽  
Author(s):  
Valentina Guccini ◽  
Annika Carlson ◽  
Shun Yu ◽  
Göran Lindbergh ◽  
Rakel Wreland Lindström ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Surface Charge ◽  
Proton Exchange Membrane ◽  
Membrane Surface ◽  
Proton Exchange ◽  
Membrane Thickness ◽  
Fuel Cell Performance ◽  
Cellulose Nanofibres ◽  
Exchange Membrane

The performance of thin carboxylated cellulose nanofiber-based (CNF) membranes as proton exchange membranes in fuel cells has been measured in-situ as a function of CNF surface charge density (600 and 1550 µmol g<sup>-1</sup>), counterion (H<sup>+</sup>or Na<sup>+</sup>), membrane thickness and fuel cell relative humidity (RH 55 to 95 %). The structural evolution of the membranes as a function of RH as measured by Small Angle X-ray scattering shows that water channels are formed only above 75 % RH. The amount of absorbed water was shown to depend on the membrane surface charge and counter ions (Na<sup>+</sup>or H<sup>+</sup>). The high affinity of CNF for water and the high aspect ratio of the nanofibers, together with a well-defined and homogenous membrane structure, ensures a proton conductivity exceeding 1 mS cm<sup>-1</sup>at 30 °C between 65 and 95 % RH. This is two orders of magnitude larger than previously reported values for cellulose materials and only one order of magnitude lower than Nafion 212. Moreover, the CNF membranes are characterized by a lower hydrogen crossover than Nafion, despite being ≈ 30 % thinner. Thanks to their environmental compatibility and promising fuel cell performance the CNF membranes should be considered for new generation proton exchange membrane fuel cells.<br>

scholarly journals Bioplastic films with unusually good oxygen barrier properties based on potato fruit-juice

RSC Advances ◽  
2021 ◽  
Vol 11 (21) ◽  
pp. 12543-12548
Author(s):  
Simi Poulose ◽  
Ilari Jönkkäri ◽  
Mikael S. Hedenqvist ◽  
Jurkka Kuusipalo
Keyword(s):  
Waste Management ◽  
Industrial Waste ◽  
Fruit Juice ◽  
Potato Starch ◽  
Barrier Properties ◽  
Oxygen Barrier ◽  
Industrial Waste Management ◽  
Starch Industry

Valorization of potato fruit juice, a potato starch industry by-product, by developing biopolymer films that could replace petroleum based alternatives in packaging, providing a greener and sustainable solution to industrial waste management.

scholarly journals Sustainable, self-cleaning, transparent, and moisture/oxygen-barrier coating film for food packaging

2021 ◽  
Author(s):  
Vu Thi Tuyet Thuy ◽  
Lam Tan Hao ◽  
Hyeonyeol Jeon ◽  
Jun Mo Koo ◽  
Jaeduk Park ◽  
...  
Keyword(s):  
Barrier Function ◽  
Food Packaging ◽  
Oxygen Barrier ◽  
Coating Film ◽  
Gas Barrier ◽  
Plastic Packaging ◽  
Chemical Damage ◽  
Barrier Coating ◽  
Self Cleaning

Plastic packaging effectively protects food from mechanical, microbial, and chemical damage; however, oxygen and moisture permeate these plastics and spoil the food. Thus, the gas barrier function is usually imparted...

Thermal and Oxygen Barrier Properties of Chitosan Bionanocomposites by Reinforcement of Calcium Carbonate Nanopowder

2014 ◽  
Vol 30 (8) ◽  
pp. 791-795 ◽  
Author(s):  
Sarat K. Swain ◽  
Satyabrata Dash ◽  
Sudhir K. Kisku ◽  
Rajesh K. Singh
Keyword(s):  
Calcium Carbonate ◽  
Barrier Properties ◽  
Oxygen Barrier

Ecofriendly Fabrication of Modified Graphene Oxide Latex Nanocomposites with High Oxygen Barrier Performance

2016 ◽  
Vol 8 (48) ◽  
pp. 33210-33220 ◽  
Author(s):  
Yidan Guan ◽  
Kevin P. Meyers ◽  
Sharathkumar K. Mendon ◽  
Guangjie Hao ◽  
Jessica R. Douglas ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
High Oxygen ◽  
Oxygen Barrier ◽  
Modified Graphene Oxide ◽  
Barrier Performance ◽  
Modified Graphene

Layer contribution model for layer-by-layer self-assembly oxygen barrier film

2017 ◽  
Vol 658 (1) ◽  
pp. 127-130 ◽  
Author(s):  
Su jeong Min ◽  
Seong Yun Lee ◽  
Jun Young Lee ◽  
Sangkug Lee ◽  
Kyung Ho Choi ◽  
...  
Keyword(s):  
Self Assembly ◽  
Oxygen Barrier ◽  
Layer By Layer ◽  
Barrier Film

RuO2 Thin Films as Bottom Electrodes for High Dielectric Constant Materials

1994 ◽  
Vol 343 ◽  
Author(s):  
K. Yoshikawa ◽  
T. Kimura ◽  
H. Noshiro ◽  
S. Ohtani ◽  
M. Yamada ◽  
...  
Keyword(s):  
Thin Films ◽  
Barrier Layer ◽  
Bottom Electrode ◽  
High Dielectric Constant ◽  
Oxygen Barrier ◽  
Metal Diffusion ◽  
Diffusion Barrier Layer ◽  
High Temperature Processes ◽  
Sputter Deposited ◽  
High Dielectric

ABSTRACTRuthenium dioxide (RuO2) thin films are evaluated as bottom electrode for dielectric SrTiO3. It was found that a RuO2 (50nm) / Ru (20nm) barrier layer on a Si substrate is effective as an oxygen barrier layer and as a metal diffusion barrier layer for sputter deposited SrTiO3 films at substrate temperature of 450°C. To test suitability for high temperature processes, RuO2/Ru electrodes were annealed in air at 600°C. 100nm-thiick RuO2 was sufficient to prevent oxygen diffusion. After annealing in the same condition, the leakage current of sputter deposited SrTiO3 (150nm) on RuO2(50nm) / Ru(50nm) was 7.6 × 10 −9 (A/cm2) at 2V.

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