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Studies On Surface Hydrophobic Modification and aging Performance Of Carbon Membrane

Authors：

ZhouXiaodong,Li Lin,Wang Tonghua

Units： 1. State Key Laboratory of Fine Chemicals, Carbon Research Laboratory,R&D Center of Membrane Science, School of Chemical Engineering, Dalian University of Technology, Dalian 116023, China

KeyWords： Sol-gel, Hydrophobic carbon membrane, TEOS, MTES, Gas separation

ClassificationCode：TQ127.2

year,volume(issue):pagination： 2014,34(4):12-19

Abstract：

The hydrophobic carbon membranes were prepared by coating the methylated silica sol, which was prepared by sol-gel method using the tetraethoxysilane (TEOS) and methyltriethoxysilane (MTES) as silica sources, on the carbon membrane and calcinating at 400-600℃ in the N2 atmosphere. The effects of silica sol preparation and membrane calcination condition on the hydrophobicity of carbon membranes were investigated. The surface structure and morphology of the hydrophobic carbon membrane were characterized by TG, FTIR, AFM, SEM and TEM. The results show that the hydrophobicity of carbon membranes is greatly improved by introducing the methylated silica structure onto the carbon membrane via silica sol. The preparation conditions of silica sol, especially the reaction temperature, have great influence on the surface chemical structure, morphology and roughness of hydrophobic carbon membrane. The contents of Methyl group on the membrane surface play a decisive role in the improvement of hydrophobic properties of carbon membranes. The hydrophobicity of carbon membranes can effectively tuned by controlling the preparation condition of silica sol and membrane calcination condition. The hydrophobic carbon membrane prepared under the optimum conditions exhibits an excellent hydrophobicity. Its surface roughness is 34.263nm and water contact angle is 138°. Aging experiment results show that hydrophobic modification greatly reduces water activity on the surface of the carbon membrane, improves the aging problem of carbon membrane and prolonges the service life of the carbon membrane. O2 permeation flux of hydrophobic carbon membrane can still keep around 65% of the original flux after 30 days under the condition of 60% relative humidity, while O2 permeation flux of original carbon membrane dropped to 10% of the original flux under the same condition.

Funds：

国家自然科学基金(20836006，20976021，21176036，21276035); 国家 863 项目(2009AA03Z215，2012AA03A611);

AuthorIntro：

周晓东(1988-)，男，安徽芜湖人，硕士生，从事炭膜材料的研究

Reference：

[1] Zhang B, Wang T H, Wu Y H. Preparation and gas permeation ofcomposite carbon membranes from poly (phthalazinone ether sulfone ketone). Sep Purif Technol, 2006, 13(44):2764 - 2769.
[2] 张兵, 王同华, 呼立红, 等. 聚酰亚胺基气体分离炭膜的进展[J]. 膜科学与技术, 2007(5):97~101.
[3] Lagorsse S, Magalh?es F D, Mendes* A. Aging study of carbon molecular sieve membranes. Journal of Membrane Science, 2008, 310(1–2):494-502.
[4] 曲爱兰, 文秀芳, 杨卓如, 等. 复合SiO2粒子涂膜表面结构及超疏水性能. 无机化学学报, 2007, 23(10):1711-1716.
[5] Chang K C, Chen Y K, Chen H. Fabrication of highly
transparent and superhydrophobic silica-based surface by TEOS/PPG hybrid with adjustment of the pH value. Surface & Coatings Technology, 2008(202):3822-3831.
[6] Feng L, Li S H, Li Y S, et al. Super-hydrophobic surfaces:From natural to artificial. Adv.Mater., 2002, 14(24):1857-1860.
[7] Gao X F, Jiang L. Water-repellent legs of water striders. Nature,2004, 432(7013):36-36.
[8] Jin Y, Su Z. Effects of polymerization conditions on hydrophilic groups in aromatic polyamide thin films [J]. Journal of Membrane Science, 2009,330(1–2):175~179.
[9] 韦奇, 李键林, 宋春林, 等.憎水二氧化硅膜的制备、表征及水热稳定性研究. 无机材料学报, 2004, 19(2):417-423.
[10] Guo Z G, Zhou F, Hao J C, et al. Stable biomimetic super-hydrophobic engineering materials. J. Am.Chem.Soc., 2005, 127 (45):15670-15671.
[11] Love J C, Gates B D, Wolfe D B, et al. Fabrication and Wetting Properties of Metallic Half-Shells with Submicron Diameters. Nano Lett.,2002 ,2(8):891-894.
[12] Li S H, Li H J, Wang X B, et al. Super-hydrophobicity of large-area honeycomb-like aligned carbonnanotubes. J.Phys.Chem.B, 2002, 106(36):9274-9276.

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