将氧化石墨烯量子点(GOQDs)引入聚醚嵌段共聚酰胺(PEBA),通过溶剂挥发法制备了具有良好分散性能和界面结合性能的PEBA/GOQDs混合基质膜,研究了GOQDs添加量对混合基质膜理化性质及气体渗透性能的影响。结果表明:GOQDs可均匀分散在PEBA聚合物基质中,提高了混合基质膜的力学性能;GOQDs含有大量的羟基和羧基,亲和能力强,对CO2有强吸附作用,显著提高了混合基质膜的CO2/N2渗透性能。当GOQDs添加量为3%(质量分数)时,PEBA/GOQDs混合基质膜的CO2渗透系数为184.32Barrer,CO2/N2选择性达到了63.56,与纯PEBA膜相比分别提高了241%和253%。
Graphene oxide quantum dots(GOQDs) were introduced into polyether block copolyamide PEBA.And PEBA/GOQDs mixed matrix membranes (MMMs) with good dispersion and interfacial bonding properties were successfully prepared by solvent evaporation method.The effects of GOQDs content on the physicochemical properties and gas permeation properties of the membranes were investigated.The results showed that GOQDs can be effectively and uniformly dispersed in the PEBA matrix.At the same time,the mechanical properties of the membranes were improved.GOQDs contained a large number of hydroxyl and carboxyl groups,and had strong adsorption of CO2,which significantly improved the CO2/N2 separation performance.For PEBA/GOQDs MMMs,when the GOQDs content was 3wt% in membranes,the permeability coefficient of CO2 and selectivity of CO2/N2 can reach 184.32 Barrer and 63.56,respectively,which increased by 241% and 253% compared with pure PEBA membrane.
[1] Arrhenius S A.On the influence of carbonic acid in the air upon the temperature of the ground[J].Philosophical Magazine,1896,41(251):237-276.
[2] Yan S,Fang M,Zhang W,et al.Comparative analysis of CO2 separation from flue gas by membrane gas absorption technology and chemical absorption technology in China[J].Energy Conversion and Management,2008,49(11):3188-3197.
[3] Ribeiro Jr C P,Freeman B D.Sorption,dilation,and partial molar volumes of carbon dioxide and ethane in cross-linked poly (ethylene oxide)[J].Macromolecules,2008,41(23):9458-9468.
[4] Wang S,Shen H,Fan S,et al.Enhanced CO2 adsorption capacity and stability using CaO-based adsorbents treated by hydration[J].AIChE Journal,2013,59(10):3586-3593.
[5] Balat H,Öz C.Technical and economic aspects of carbon capture and storage a review[J].Energy Exploration and Exploitation,2007,25(5):357-392.
[6] Yang H Q,Xu Z H,Fan M H,et al.Progress in carbon dioxide separation and capture:a review[J].Journal of Environmental Sciences,2008,20(1):14-27.
[7] Shafeeyan M S,Daud W M A W,Houshmand A,et al.A review on surface modification of activated carbon for carbon dioxide adsorption[J].Journal of Analytical and Applied Pyrolysis,2010,89(2):143-151.
[8] Mannan H A,Mukhtar H,Murugesan T,et al.Recent applications of polymer blends in gas separation membranes[J].Chemical Engineering and Technology,2013,36(11):1838-1846.
[9] Sridhar S,Smitha B,Aminabhavi T M.Separation of carbon dioxide from natural gas mixtures through polymeric membranes—a review[J].Separation and Purification Reviews,2007,36(2):113-174.
[10] Armstrong S,Freeman B,Hiltner A,et al.Gas perme ability of melt-processed poly (ether block amide) copolymers and the effects of orientation[J].Polymer,2012,53(6):1383-1392.
[11] Chen J C,Feng X,Penlidis A.Gas permeation through poly (ether-b-amide)(PEBAX 2533) block copolymer membranes[J].Separation Science and Technology,2005,39(1):149-164.
[12] 杨超.聚醚共聚乙酰胺膜的溶胀及渗透汽化性能研究[D]:南宁:广西大学,2008.
[13] Robeson L M.The upper bound revisited[J].Journal of Membrane Science,2008,320(1):390-400.
[14] Dong L,Chen M,Li J,et al.Metal-organic framework-graphene oxide composites:a facile method to highly improve the CO2 separation performance of mixed matrix membranes[J].Journal of Membrane Science,2016,520:801-811.
[15] Yuan Jianwei,Zhu Haipeng,Sun Jiajia,et al.Novel ZIF-300 mixed-matrix membranes for efficient CO2 capture[J].ACS Applied Materials & Interfaces,2017,9(44):38575-38583.
[16] 郝娅男.石墨烯量子点氮掺杂石墨烯量子点的制备及性能研究[D]:西安:西北大学,2015.
[17] Song X,Zhou Q,Zhang T,et al.Pressure-assisted preparation of graphene oxide quantum dot-incorporated reverse osmosis membranes:antifouling and chlorine resistance potentials[J].Journal of Materials Chemistry A,2016,4(43):16896-16905.
[18] Dong Y,Shao J,Chen C,et al.Blue luminescent graphene quantum dots and graphene oxide prepared by tuning the carbonization degree of citric acid[J].Carbon,2012,50(12):4738-4743.
[19] Bondi A.Van der Waals volumes and radii[J].Journal of Physical Chemistry,1964,68:441-451.
[20] Ghadimi A,Amirilargani M,Mohammadi T,et al.Preparation of alloyed poly (ether block amide)/poly (ethylene glycol diacrylate) membranes for separation of CO2/H2 (syngas application)[J].Journal of Membrane Science,2014,458:14-26.
[21] Bernardo P,Jansen J C,Bazzarelli F,et al.Gas transport properties of pebaxs/room temperature ionic liquid gel membranes[J].Separation and Purification Technology,2012,97:73-82.
基金资助
江苏省产学研前瞻性联合研究项目(BY2016022-13)
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