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Preparation and performance of TFC-FO membranes prepared on different HMPA concentrations
Authors: HAN Xueli, SUN Na, WANG Duo, WANG Meng
Units: College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
KeyWords: forward osmosis; polyamide composite membrane; polar aprotic solvent; HMPA
ClassificationCode:TQ028.8
year,volume(issue):pagination: 2021,41(1):16-23

Abstract:
 In order to improve the performance of the composite forward osmosis membrane, it mainly starts from the following two aspects, optimizing the porous support layer and changing the structure of the active separation layer, while the active separation layer plays an important role on properties of membrane. In this paper, as a polar aprotic solvent, hexamethyl phosphoramide (HMPA) was added to the aqueous solution during the interfacial polymerization process. A series of characterizations of polyamide composite forward osmosis membranes with different HMPA concentrations were performed to observe the effect of the aqueous phase additive HMPA on membrane performance. Results showed that the cross-linking degree of the polyamide increased first and then decreased with the increase of HMPA concentration, and achieved the top value at 2.0 wt%. The morphology of the membrane surface indicated that HMPA had an effect on the surface morphology of the membrane, and the skin layer thickness and surface roughness of the membrane increased gradually. What’s more, it can be found that the hydrophilicity of the membrane surface was influenced by its chemical structure and surface morphology. The results of water flux and reverse salt flux showed that the water flux of M2 (2.0 % HMPA addition) increased by about 60% compared with M0 (without HMPA) while with a lower salt water ratio under FO mode for 1 mol/L NaCl draw solution from a de-ionized water feed solution.

Funds:
国家自然科学基金项目(21576249)

AuthorIntro:
韩雪笠(1995-),女,山东滨州人,在读硕士,从事功能膜材料的制备研究,联系电话:0532-66786513.

Reference:
[1] Akther N, Sodiq A, Giwa A, et al. Recent advancements in forward osmosis desalination: A review. Chemical Engineering Journal, 2015, 281(1): 502-522.
[2] Li D, Yan Y, Wang H. Recent advances in polymer and polymer composite membranes for reverse and forward osmosis processes. Progress in Polymer Science, 2016, 61: 104-155.
[3] 方彦彦,田野,王晓琳.正渗透的机理[J].膜科学与技术,2011,31(6):95-100.
[4] 王涛,王宁,陆金仁,等.正渗透膜污染特征及抗污染正渗透膜研究进展[J].膜科学与技术,2017,37(1):125-132.
[5] Cornelissen E R, Harmsen D, Beerendonk E F, et al. The innovative osmotic membrane bioreactor (OMBR) for reuse of wastewater. Water Science &Technology, 2011, 63(8): 1557-1565.
[6] 胡群辉,邹昊,姜莹,等.正渗透膜分离关键技术及其应用进展[J].膜科学与技术,2014,34(5):109-115.
[7] Yang S, Kim K Y, Chae K J, et al. Evaluation of energy and water recovery in forward osmosis–bioelectrochemical hybrid system with cellulose triacetate and polyamide asymmetric membrane in different orientations. Desalination and Water Treatment, 2016, 57(16): 7406-7413.
[8] Suwaileh W A, Johnson D J, Sarp S, et al. Advances in forward osmosis membranes: Altering the sub-layer structure via recent fabrication and chemical modification approaches. Desalination, 2018, 436: 176-201.
[9] Kai Y W, Chung T H, Amy G. Developing thin-film-composite forward osmosis membranes on the PES/SPSf substrate through interfacial polymerization. Aiche Journal, 2012, 58(3): 770-781.
[10] Qiu M, Wang J, He C. A stable and hydrophilic substrate for thin-film composite forward osmosis membrane revealed by in-situ cross-linked polymerization. Desalination, 2018, 433: 1-9.
[11] Wei J, Qiu C, Tang C Y, et al. Synthesis and characterization of flat-sheet thin film composite forward osmosis membranes. Journal of Membrane Science, 2011, 372(1-2): 292-302.
[12] Yao Z, Guo H, Yang Z, et al. Reactable substrate participating interfacial polymerization for thin film composite membranes with enhanced salt rejection performance. Desalination, 2018, 436: 1-7.
[13] Tian M, Wang R. Synthesis and characterization of novel high-performance thin film nanocomposite (TFN) FO membranes with nanofibrous substrate reinforced by functionalized carbon nanotubes. Desalination, 2015, 370(4): 79-86.
[14] Huang Y, Wang D. Performance of composite reverse osmosis membranes fabricated with polyester mesh as support. Journal of Functional Materials, 2011, 42(7): 1249-1252.
[15] Emadzadeh D, Lau W J, Matsuura T, et al. Synthesis and characterization of thin film nanocomposite forward osmosis membrane with hydrophilic nanocomposite support to reduce internal concentration polarization. Journal of Membrane Science, 2014, 449(1): 74-85.
[16] Ma N, Wei J, Qi S, et al. Nanocomposite substrates for controlling internal concentration polarization in forward osmosis membranes. Journal of Membrane Science, 2013, 441(15): 54-62.
[17] Emadzadeh D, Lau W J, Matsuura T, et al. The potential of thin film nanocomposite membrane in reducing organic fouling in forward osmosis process. Desalination, 2014, 348: 82-88.
[18] Wei J, Liu X, Qiu C, et al. Influence of monomer concentrations on the performance of polyamide-based thin film composite forward osmosis membranes. Journal of Membrane Science, 2011, 381(1): 110-117.
[19] Ghosh A K, Jeong B H, Huang X, et al. Impacts of reaction and curing conditions on polyamide composite reverse osmosis membrane properties. Journal of Membrane Science, 2008, 311(1): 34-45.
[20] Duan M, Wang Z, Xu J, et al. Influence of hexamethyl phosphoramide on polyamide composite reverse osmosis membrane performance. Separation and Purification Technology, 2010, 75(2): 145-155.
[21] Khorshidi B, Thundat T, Pernitsky D, et al. A parametric study on the synergistic impacts of chemical additives on permeation properties of thin film composite polyamide membrane. Journal of Membrane Science, 2017, 535: 248-257.
[22] Sung Ho K, Seung-Yeop K, Takenori S. Positron annihilation spectroscopic evidence to demonstrate the flux-enhancement mechanism in morphology-controlled thin-film-composite (TFC) membrane. Environmental Science &Technology, 2005, 39(6): 1764-1770.
[23] Dutta D, Bhattacharyya A, Ganguly B N. Microstructural study of aromatic polyamide membrane material. Journal of Membrane Science, 2003, 224(1): 127-135.

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