Corrigendum to “The role of sulphonated polymer and macrovoid-free structure in the support layer for thin-film composite (TFC) forward osmosis (FO) membranes” [J. Membr. Sci. 383 (2011) 214–223]

Widjojo, Natalia; Chung, Tai‐Shung; Weber, Martin; Maletzko, Christian; Warzelhan, Volker

doi:10.1016/j.memsci.2011.10.033

Cited by 16 publications

(29 citation statements)

References 3 publications

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“…On the other hand, according to McCutcheon et al., hydrophilic substrates tend to have better FO flux performance because of improved wetting . In addition, Widjojo's group also suggested that the improved wettability of membrane substrates is a much stronger factor enhancing water flux in FO process . This hypothesis is consistent with the observations of this study.…”

Section: Resultssupporting

confidence: 90%

“…Widjojo's group further investigated the effect of sulfonated material in the TFC substrate and reported modifications in both the morphology and the wettability of the resulting membranes. [31] The sulfonated TFC membranes achieved a 21 L m -2 h -1 water flux using a 2 m NaCl draw solution in FO mode. Similarly, Han and coworkers observed a 50% increase in FO flux due to the enhanced wettability of the substrate when a sulfonated poly (ether ether ketone) was added to polysulfone matrix.…”

Section: Introductionmentioning

confidence: 99%

“…The resultant TFC membranes showed a neat increase in FO flux when compared to those prepared from a commercial PVDF support. Widjojo's group further investigated the effect of sulfonated material in the TFC substrate and reported modifications in both the morphology and the wettability of the resulting membranes . The sulfonated TFC membranes achieved a 21 L m –2 h –1 water flux using a 2 m NaCl draw solution in FO mode.…”

Section: Introductionmentioning

confidence: 99%

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Maximizing the Degree of Sulfonation of Polysulfone Supports in TFC Membranes for Osmotically Driven Processes

Grinic

Giagnorio

Cosola

et al. 2018

Macro Materials & Eng

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In this work, thin‐film composite (TFC) polyamide membranes are prepared by introducing the highest amount of sulfonated polysulfone into the polysulfone‐based support layer with the goal to improve membrane performance in osmotically driven processes. Sulfonated polymers are synthesized via a one‐step reaction and used in suitable blends with pristine polysulfone to cast porous layers by phase inversion process. The sulfonated support substrates exhibit enhanced wettability over the traditional polysulfone layers as confirmed by a two‐fold decrease in water contact angle. Using a 0.35 mm NaCl draw solution, the best sulfonated TFC membranes achieve up to 16 and 21 L m−2 h−1 under forward osmosis (FO) and pressure‐retarded osmosis (PRO) configurations, respectively. However, no significant alterations in the support layer morphology can be detected. It is speculated, therefore, that wettability is the key factor for the observed improved osmotic flux, with a trade‐off between water and reverse salt fluxes.

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Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Maximizing the Degree of Sulfonation of Polysulfone Supports in TFC Membranes for Osmotically Driven Processes

Grinic

Giagnorio

Cosola

et al. 2018

Macro Materials & Eng

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“…Therefore, using μ p and σ p , the pore‐size distribution can be obtained from the probability density function in eq.

\frac{d R true(d_{p} true)}{d d_{p}} = \frac{1}{d_{p} \ln σ_{p} \sqrt{2 π}} exp true[\frac{{true(\ln d_{p} - \ln μ_{p} true)}^{2}}{2 {true(\ln d_{p} true)}^{2}} true],

where d p is the pore radius of the membrane.…”

Section: Methodsmentioning

confidence: 99%

Investigating the structure and water permeation of membranes modified with natural and synthetic additives using tensile, porosity, and glass transition temperature studies

Vilakati

Hoek

Mamba

2014

J of Applied Polymer Sci

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This article reports the results of a study on the effect of using different additives (lignin, polyethylene glycol [PEG], and polyvinyl pyrrolidone [PVP]) to fabricate ultrafiltration polysulfone (PSf) membranes. The main focus of this study was on the difference in permeation properties brought about by the absence or presence of a fabric when fabricating the membranes. Differential scanning calorimetry was used to characterize the thermal properties and was also used to predict the other membrane properties. An Instron machine was used to evaluate the mechanical properties. The bulk porosity of lignin and PVP‐modified membranes was observed to be higher than that of the membranes modified with PEG. There was a strong negative correlation between the bulk porosity and the glass transition temperature irrespective of the additive used. Membranes cast on a fabric showed higher flux compared with membranes cast on glass. There was a strong positive correlation between the bulk porosity and the observed permeability regardless of whether the membrane was cast on a nonwoven fabric or on a glass plate. Pore‐size distribution results showed that lignin and PVP‐modified membranes had a narrow pore‐size distribution ranging between 10 and 25 nm when compared with PEG‐modified membranes with a pore‐size distribution ranging between 2.5 and 20 nm. These results indicate that thermal, bulk porosity, and mechanical properties can be used to probe the membrane structure. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40616.

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“…into either membrane substrates [54] or membrane surfaces [55,56] may leak out after a long-term operation as a result of no affinitive interaction between the added materials and membrane. Unlike physical modification, chemical modification is conducted on either membrane surface [57][58][59][60] or membrane polymer prior to the membrane fabrication [61][62][63][64][65] via chemical reactions between materials to enhance membrane hydrophilicity. Chemical modification on membrane or functionalization on membrane polymers (eg.…”

Section: Advances In Fo Membranesmentioning

confidence: 99%

Progress in Forward Osmosis Membrane Separation Process

Chen¹,

Xu²,

Ge³

2017

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Forward osmosis (FO) has been extensively investigated and demonstrated its advantages in a range of FO applications over the past decade. However, challenges still remain in terms of the lack of both efficient FO membranes and appropriate draw solutes for practical FO applications. To promote the advancement of FO technology, considerable efforts have been made in exploring novel FO membranes and draw solutes in recent years. This paper will provide a short review on the progress of both FO membranes and draw solutes. First of all, a brief overview on FO principle is given. Then the progress in FO technology related to FO membrane and draw solute is presented with specific examples. Finally, challenges and future directions of FO technology in exploring efficient FO membranes and promising draw solutes are also highlighted. This article may provide new insights into the future development of FO technology and promote practical FO applications.Keywords forward osmosis, draw solution, forward osmosis membrane, forward osmosis application IntroductionFreshwater shortage has been becoming a more and more severe problem globally. [1][2][3][4] To mitigate this problem, various technologies for clean water production have been explored worldwide recently. [5][6][7][8][9] Membrane technology has shown a great potential in water treatment in view of the advantages of no phase change, strong adaptability, relatively simple operation and low cost. [5,[10][11][12] A range of pressure-driven membrane processes, such as microfiltration (MF), [13][14][15][16] ultrafiltration (UF), [13,17,18] nanofiltration (NF), [19][20][21] and reverse osmosis (RO) [22][23][24][25][26] have been extensively used for clean water production through either wastewater reuse or brackish water/ seawater desalination. However, some issues, such as severe membrane fouling, low water recovery rate, intensive-energy consumption and relatively low quality of product water, occur frequently during these processes. [10,13,17,23,27] FO has been recognized as a promising membrane process because of the following characteristics: (1) no requirement of hydraulic pressure; (2) a relatively high water recovery rate; (3) low membrane fouling propensity due to the absence of hydraulic pressure; (4) environmental friendliness. Given these merits, FO technology has been applied to a wide range of fields, such as seawater/brackish water desalination, [4,24,28] wastewater treatment, [8,[29][30][31] and many other areas. [32][33][34][35][36] Although FO exhibits a great potential in alleviating the issues caused by freshwater shortage, challenges, such as relatively low water permeability, high reverse solute diffusion, severe concentration polarization (CP), and membrane fouling, are still present in FO applications. [37][38][39] To eliminate these problems, exploration of appropriate semi-permeable FO membrane and draw solute is urgently needed. Great efforts have been made in the development of FO technology in recent years, and a wide range of powerful FO membra...

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Corrigendum to “The role of sulphonated polymer and macrovoid-free structure in the support layer for thin-film composite (TFC) forward osmosis (FO) membranes” [J. Membr. Sci. 383 (2011) 214–223]

Cited by 16 publications

References 3 publications

Maximizing the Degree of Sulfonation of Polysulfone Supports in TFC Membranes for Osmotically Driven Processes

Maximizing the Degree of Sulfonation of Polysulfone Supports in TFC Membranes for Osmotically Driven Processes

Investigating the structure and water permeation of membranes modified with natural and synthetic additives using tensile, porosity, and glass transition temperature studies

Progress in Forward Osmosis Membrane Separation Process

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