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Paper-Based Bipolar Electrochemistry
Renault, Christophe,Scida, Karen,Knust, Kyle N.,Fosdick, Stephen E.,Crooks, Richard M. The Korean Electrochemical Society 2013 Journal of electrochemical science and technology Vol.4 No.4
We demonstrate that carbon electrodes screen-printed directly on cellulose paper can be employed to perform bipolar electrochemistry. In addition, an array of 18 screen-printed bipolar electrodes (BPEs) can be simultaneously controlled using a single pair of driving electrodes. The electrochemical state of the BPEs is read-out using electrogenerated chemiluminescence. These results are important because they demonstrate the feasibility of coupling bipolar electrochemistry to microfluidic paperbased analytical devices (${\mu}PADs$) to perform highly multiplexed, low-cost measurements.
Khouloud Cheour,Mustapha Assarar,Daniel Scida,Rezak Ayad,Xiao-Lu Gong 한국섬유공학회 2020 Fibers and polymers Vol.21 No.1
The hybrid solution of natural-synthetic fibres can be an effective option to enhance the moisture resistance ofnatural fibre reinforced polymer composites. This work aims at studying the effect of long-term water immersion of hybridcomposites on their mechanical and damping properties. These properties were investigated using free vibrations fromsamples composed of quasi-unidirectional flax and glass layers and epoxy resin. The results showed that the saturation massuptake and the diffusion coefficient of the composites were strongly dependent on the stacking sequence between the flax andglass layers. For instance, less than 25 days were necessary to reach the water saturation when flax fibre reinforcements werein the outer layers, whereas it took over 10 months when these reinforcements were in the inner layers. Compared to the flaxfibre reinforced composite, the flax-glass hybrid laminate with two inner flax layers and two outer glass layers was the mostefficient for a specification where damping and bending modulus are the main criteria. This one enabled a significant increasein bending and specific bending moduli (+38 % and +79 % respectively compared to the unaged flax laminate), aconsiderable slowing down of the diffusion phenomenon, while limiting the decrease in damping property with ageing(-20 %).