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Polymers 2017, 9(8), 336; https://doi.org/10.3390/polym9080336

New Eco-Friendly Phosphorus Organic Polymers as Gas Storage Media

1
Department of Chemistry, College of Science, Tikrit University, Tikrit, Iraq
2
Cornea Research Chair, Department of Optometry, College of Applied Medical Sciences, King Saud University, P.O. Box 10219, Riyadh 11433, Saudi Arabia
3
Department of Chemistry, College of Science, Al-Nahrain University, Baghdad 64021, Iraq
*
Authors to whom correspondence should be addressed.
Received: 12 July 2017 / Revised: 30 July 2017 / Accepted: 1 August 2017 / Published: 3 August 2017
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Abstract

Three phosphate esters 13 were successfully synthesized from the reaction of 2-, 3- and 4-hydroxybenzaldehyde with phosphoryl chloride. Reactions of 13 with benzidine in the presence of glacial acetic acid gave the corresponding novel phosphorus organic polymers 46 containing the azomethane linkage. The structures of the synthesized compounds were confirmed by Fourier transform infrared spectroscopy, nuclear magnetic resonance and elemental analysis. Interesting physiochemical properties for the polymeric materials 46 were observed using a combination of several techniques such as gel permeation chromatography, scanning electron microscopy, Brunauer–Emmett–Teller and nitrogen adsorption–desorption isotherm, Barrett–Joyner–Halenda and H-sorb 2600 analyzer. The mesoporous polymers 46 exhibit tunable porosity with Brunauer–Emmett–Teller surface area (SABET = 24.8–30 m2·g–1), pore volume (0.03–0.05 cm3·g–1) and narrow pore size distribution, in which the average pore size was 2.4–2.8 nm. Polymers 46 were found to have high gas storage capacity and physico-chemical stability, particularly at a high pressure. At 323 K and 50 bars, polymers 46 have remarkable carbon dioxide uptake (up to 82.1 cm3·g–1) and a low hydrogen uptake (up to 7.4 cm3·g–1). The adsorption capacity of gasses for polymer 5 was found to be higher than those for polymers 4 and 6. View Full-Text
Keywords: eco-friendly polymers; phosphorus polymers; gas storage; gas uptake; gas capture; Brunauer–Emmett–Teller surface area eco-friendly polymers; phosphorus polymers; gas storage; gas uptake; gas capture; Brunauer–Emmett–Teller surface area
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Ahmed, D.S.; El-Hiti, G.A.; Yousif, E.; Hameed, A.S.; Abdalla, M. New Eco-Friendly Phosphorus Organic Polymers as Gas Storage Media. Polymers 2017, 9, 336.

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