Investigation of sponge-like substrates for preparation of reverse osmosis composite membranes

doi:10.11949/j.issn.0438-1157.20150161

Abstract

Abstract:

A series of sponge-like polysulfone substrates were fabricated by adjusting the content of PSf and water in the casting solutions. Then, the polyamide reverse osmosis composite membranes were prepared via interfacial polymerization between m-phenylenediamine and trimethyl chloride over the polysulfone substrates. The resulting substrates and reverse osmosis membranes were characterized to investigate the influence of the polysulfone concentration on the substrates properties and the effect of the substrates properties on the polyamide reverse osmosis membranes. The results showed that with increasing PSf concentration, the average surface pore size and porosity of the substrates decreased, and the resistance ability to compaction enhanced. Besides, the reverse osmosis composite membranes prepared by using different PSf substrates showed different flux and salt rejection. Considering the properties of the substrates and the polyamide reverse osmosis composite membranes, sponge-like substrate by using 15%(mass) polysulfone concentration was suitable for the preparation of reverse osmosis composite membrane.

Key words: membrane, sponge-like, substrates, polysulfone, reverse osmosis

摘要：

通过调节铸膜液中聚砜浓度和非溶剂含量,浸没沉淀法制备海绵状结构的支撑膜,并在支撑膜上界面聚合制备聚酰胺反渗透复合膜。分别对支撑膜及反渗透复合膜的结构和性能进行表征,考察聚砜浓度对支撑膜结构和性能的影响,以及不同结构支撑膜对反渗透复合膜结构和性能的影响。结果显示,随着聚砜浓度的增加,支撑膜表面孔径和孔隙率下降,断面结构变致密,耐压性增强。在不同支撑膜上制备的反渗透复合膜具有不同的通量和脱盐率。综合考虑支撑膜及反渗透复合膜的性能,以聚砜浓度为15%制备的海绵状结构支撑膜更适于作为制备反渗透复合膜的支撑层。

关键词: 膜, 海绵状结构, 支撑膜, 聚砜, 反渗透

CLC Number:

TQ028.8

ZHU Shu, ZHAO Song, WANG Zhi, TIAN Xinxia, SHI Mengqi, WANG Jixiao. Investigation of sponge-like substrates for preparation of reverse osmosis composite membranes[J]. CIESC Journal, 2015, 66(10): 3991-3999.

朱姝, 赵颂, 王志, 田欣霞, 时孟琪, 王纪孝. 用于反渗透复合膜的海绵状结构支撑膜制备研究[J]. 化工学报, 2015, 66(10): 3991-3999.

References 28

[1]	Van Der Bruggen B, Vandecasteele C, Van Gestel T, et al. A review of pressure-driven membrane processes in wastewater treatment and drinking water production [J]. Environ. Prog., 2003, 22(1): 46-56.
[2]	Pendergast M M, Hoek E M V. A review of water treatment membrane nanotechnologies [J]. Energy Environ. Sci., 2011, 4 (6): 1946-1971.
[3]	Lau W J, Ismail A F, Misdan N, et al. A recent progress in thin film composite membrane: a review [J]. Desalination, 2012, 287 (0): 190-199.
[4]	Rhim J W, Lee B, Park H H, et al. Preparation and characterization of chlorine resistant thin film composite polyamide membranes via the adsorption of various hydrophilic polymers onto membrane surfaces [J]. Macromol. Res., 2014, 22 (4): 361-369.
[5]	Wang T, Dai L, Zhang Q, et al. Effects of acyl chloride monomer functionality on the properties of polyamide reverse osmosis (RO) membrane [J]. J. Membr. Sci., 2013, 440: 48-57.
[6]	Lalia B S, Kochkodan V, Hashaikeh R, et al. A review on membrane fabrication: structure, properties and performance relationship [J]. Desalination, 2013, 326: 77-95.
[7]	Qiu Shi (邱实), Wu Liguang(吴礼光), Zhang Lin(张林), et al. Effect of addition of alcohols on preparation of reverse osmosis composite membrane with high flux by interfacial polymerization [J]. CIESC Journal(化工学报), 2011, 62 (12): 3440-3446.
[8]	Ghosh A K, Hoek E M V. Impacts of support membrane structure and chemistry on polyamide-polysulfone interfacial composite membranes [J]. J. Membr. Sci., 2009, 336 (1/2): 140-148.
[9]	Singh P S, Joshi S V, Trivedi J J, et al. Probing the structural variations of thin film composite RO membranes obtained by coating polyamide over polysulfone membranes of different pore dimensions [J]. J. Membr. Sci., 2006, 278 (1/2): 19-25.
[10]	Kim H I, Kim S S. Plasma treatment of polypropylene and polysulfone supports for thin film composite reverse osmosis membrane [J]. J. Membr. Sci., 2006, 286 (1/2): 193-201.
[11]	Zhang Z, An Q, Liu T, et al. Fabrication of polysulfone ultrafiltration membranes of a density gradient cross section with good anti-pressure stability and relatively high water flux [J]. Desalination, 2011, 269 (1-3): 239-248.
[12]	Pendergast M T M, Nygaard J M, Ghosh A K, et al. Using nanocomposite materials technology to understand and control reverse osmosis membrane compaction [J]. Desalination, 2010, 261 (3): 255-263.
[13]	Sukitpaneenit P, Chung T S. High performance thin-film composite forward osmosis hollow fiber membranes with macrovoid-free and highly porous structure for sustainable water production [J]. Environ. Sci. Technol., 2012, 46 (13): 7358-7365.
[14]	Persson K M, Gekas V, Trägårdh G. Study of membrane compaction and its influence on ultrafiltration water permeability [J]. J. Membr. Sci., 1995, 100 (2): 155-162.
[15]	Ebert K, Fritsch D, Koll J, et al. Influence of inorganic fillers on the compaction behaviour of porous polymer based membranes [J]. J. Membr. Sci., 2004, 233 (1/2): 71-78.
[16]	Li X, Zhang S, Fu F, et al. Deformation and reinforcement of thin-film composite (TFC) polyamide-imide (PAI) membranes for osmotic power generation [J]. J. Membr. Sci., 2013, 434(1): 204-217.
[17]	Kallioinen M, Pekkarinen M, Mänttäri M, et al. Comparison of the performance of two different regenerated cellulose ultrafiltration membranes at high filtration pressure [J]. J. Membr. Sci., 2007, 294 (1/2): 93-102.
[18]	Sun Ning(孙宁). Study on preparation of polyanilinenanofiber/polysulfone blended membrane[D]. Tianjin: Tianjin University, 2008.
[19]	Kim I C, Lee K H. Effect of various additives on pore size of polysulfone membrane by phase-inversion process [J]. J. Appl. Polym. Sci., 2003, 89 (9): 2562-2566
[20]	Zhu Zhenxin(祝振鑫).Hydrophilicity, wettability and contact angle [J]. Membrane Science and Technology(膜科学与技术), 2014, 34 (2): 1-4
[21]	Peterson R A, Greenberg A R, Bond L J, et al. Use of ultrasonic TDR for real-time noninvasive measurement of compressive strain during membrane compaction [J]. Desalination, 1998, 116 (2/3): 115-122
[22]	Basri H, Ismail A F, Aziz M. Microstructure and anti-adhesion properties of PES/TAP/Ag hybrid ultrafiltration membrane [J]. Desalination, 2012, 287(1): 71-77
[23]	Duan M, Wang Z, Xu J, et al. Influence of hexamethyl phosphoramide on polyamide composite reverse osmosis membrane performance [J]. Sep. Purif. Technol., 2010, 75 (2): 145-155.
[24]	Prakash Rao A, Joshi S V, Trivedi J J, et al. Structure-performance correlation of polyamide thin film composite membranes: effect of coating conditions on film formation [J]. J. Membr. Sci., 2003, 211 (1): 13-24.
[25]	Kim S H, Kwak S Y, Suzuki T. Positron annihilation spectroscopic evidence to demonstrate the flux-enhancement mechanism in morphology-controlled thin-film-composite (TFC) membrane [J]. Environ. Sci. Technol., 2005, 39 (6): 1764-1770.
[26]	Veerababu P, Vyas B B, Singh P S, et al. Limiting thickness of polyamide-polysulfone thin-film-composite nanofiltration membrane [J]. Desalination, 2014, 346 (1): 19-29.
[27]	Li X, Wang K Y, Helmer B, et al. Thin-film composite membranes and formation mechanism of thin-film layers on hydrophilic cellulose acetate propionate substrates for forward osmosis processes [J]. Ind. Eng. Chem. Res., 2012, 51 (30): 10039-10050.
[28]	Scheiner S. Hydrogen Bonding: A Theoretical Perspective (Topics in Physical Chemistry)[M]. New York: Oxford University Press, 1997.