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Title: Chitosan/polyvinyl alcohol nanofibrous membranes: towards green super-adsorbents for toxic gases
Authors: Sargazi, G.
Afzali, D.
Mostafavi, A.
Shadman, A.
Rezaee, B.
Zarrintaj, P.
Saeb, M.R.
Ramakrishna, S. 
Mozafari, M.
Keywords: Materials science
Issue Date: 2019
Publisher: Elsevier Ltd
Citation: Sargazi, G., Afzali, D., Mostafavi, A., Shadman, A., Rezaee, B., Zarrintaj, P., Saeb, M.R., Ramakrishna, S., Mozafari, M. (2019). Chitosan/polyvinyl alcohol nanofibrous membranes: towards green super-adsorbents for toxic gases. Heliyon 5 (4) : e01527. ScholarBank@NUS Repository.
Rights: Attribution-NonCommercial-NoDerivatives 4.0 International
Abstract: Removal of hazardous gases from the atmosphere has become a big challenge for scientists and engineers alike. Eco-friendly nature of biopolymers has given a new dimension to the debate within the environmental science area but attempts mainly failed to cleanse the air stream of toxic gases as a consequence of design imperfections. In this work, green electrospun nanofibrous membranes based on chitosan (Cs)/polyvinyl alcohol (PVA) composite with a very high carbon monoxide adsorption capacity (much higher than the values one may expect from activated carbon and zeolite adsorbents, and also higher than that of the metal-organic framework) are developed. 2 k?1 factorial design, response surface and desirability function analyses are merged to optimize the electrospinning parameters for functional-based carbon monoxide elimination. The best Cs/PVA adsorbent obtained through multi-objective optimization has a very high desirability value level of 0.953. Optimized electrospinning parameters are: Voltage = 17 kV, spinning distance = 13 cm, flow rate = 0.2 mL/h, and PVA concentration = 6 wt.%; and optimized properties are: maximum thermal stability = 329 °C, minimum fiber diameter = 9.8 nm, and maximum surface area = 2204 m 2 /g. This work opens a new era for taking the next steps towards the design and optimization of green super-adsorbents for gaseous contaminations. © 2019
Source Title: Heliyon
ISSN: 2405-8440
DOI: 10.1016/j.heliyon.2019.e01527
Rights: Attribution-NonCommercial-NoDerivatives 4.0 International
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