Defect free hollow fiber reverse osmosis membranes by combining layer-by-layer and interfacial polymerization

Ormancı-Acar, Türkan; Mohammadifakhr, Mehrdad; Benes, Nieck E.; Vos, Wiebe M. de

doi:10.1016/j.memsci.2020.118277

Cited by 27 publications

(19 citation statements)

References 29 publications

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“…In other words, the presence of the intermediate layer increased the success rate of IP in the inner surface of the HFs. Similar results were found by Ormanci-Acar et al [37] where the addition of 3.5 polyelectrolyte bilayers as intermediate layer helped to improve the IP results.…”

Section: Pure Water Permeancesupporting

confidence: 89%

“…All these surface modifications were performed in an attempt to improve the surface in order to improve the IP reaction as well as the adhesion of the selective layer to the support to prevent delamination. One of the methods for priming the surface for IP is to apply an intermediate layer, which has been investigated in several studies [33][34][35][36][37]. The addition of an intermediate layer fills the pinholes of the support and it yields a smooth layer possibly leading to increased IP success rates.…”

Section: Introductionmentioning

confidence: 99%

“…The addition of an intermediate layer fills the pinholes of the support and it yields a smooth layer possibly leading to increased IP success rates. For example, in earlier work, a polyelectrolyte multilayer was utilized as an intermediate layer to increase the IP success rate [37]. Although this method proved to be successful, this method involves a number of timeconsuming post-treatment steps that limit its applicability.…”

Section: Introductionmentioning

confidence: 99%

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Increasing the success rate of interfacial polymerization on hollow fibers by the single-step addition of an intermediate layer

Mohammadifakhr

Trzaskuś²,

Kemperman

et al. 2020

Desalination

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In this paper, we introduce a single-step process that incorporates an intermediate layer on a hollow fiber to enhance the final membrane performance after interfacial polymerization (IP). This intermediate layer is applied during hollow-fiber spinning by complexation of two oppositely charged polyelectrolytes. Specifically, in this study, we consider the IP coating process an experimental success for a membrane sample with a NaCl rejection > 85%. The IP success rate is defined as the percentage of the samples with a NaCl rejection of > 85% within a studied group. The purpose of the intermediate layer is to increase the success rate of IP on the inner surface of the hollow fibers, typically a challenging task due to the cylindrical shape of the fibers. After the application of IP, the pure water permeance and NaCl rejection of the nascent membranes were tested to determine the success rate of IP. The IP success rate was 86-100% for the hollow fibers (HF) with intermediate layer, significantly higher than the 29% success rate achieved for IP on the support without intermediate layer. This surface modification approach is simple, time-efficient, and effective without any need for post-IP optimization that opens up new avenues for further developments for IP based dense hollow fiber membranes.

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Section: Pure Water Permeancesupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Increasing the success rate of interfacial polymerization on hollow fibers by the single-step addition of an intermediate layer

Mohammadifakhr

Trzaskuś²,

Kemperman

et al. 2020

Desalination

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“…The accumulation of nanoparticles on the surface is obvious and this led to improve the membrane hydrophobicity. If the agglomerated nanoparticles was detached from the surface of MMM membrane during fabrication and coagulation, they would cause the generation of large pores 31,32 . An example of these large pores is shown in Figure 6n with the black circle for the MMM‐1.0SR‐0.5SIA membrane.…”

Section: Resultsmentioning

confidence: 99%

“…If the agglomerated nanoparticles was detached from the surface of MMM membrane during fabrication and coagulation, they would cause the generation of large pores. 31,32 An example of these large pores is shown in Figure 6n with the black circle for the MMM-1.0SR-0.5SIA membrane. Unfortunately, these large pores caused fluctuation in CEPw results when we were performing the test for different samples.…”

Section: Fesem Analysismentioning

confidence: 99%

On performance of polycarbonate/silica aerogel nanoparticle mixed matrix hollow fiber membrane coated with polydimethylsiloxane for membrane distillation

Rezaei

Hashemifard

Abbasi

2022

J of Applied Polymer Sci

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The membrane distillation process is one of the most important membrane technologies being developed for water desalination, which has the ability to compete with expensive processes such as reverse osmosis. In this study, the performance of polycarbonate (PC) hollow fiber membranes modified with silica aerogel nanoparticles (SIA-NPs) and polydimethylsiloxane (PDMS) coating solution for direct contact membrane distillation was investigated. The membranes were fabricated by dry jet-wet spinning method. In this respect, 0.25, 0.5, and 1 wt% of SIA nanoparticles were coated over the hollow fiber surface in order to improve the performance of the membranes. The results indicated that the optimum loading of SIA was 0.5 wt% at which the contact angle of the surface shifted from 77.5 to 100 relative to the unmodified PC membrane.Although the addition of SIA nanoparticles to the membrane matrix did not alter the membrane conductivity, it increased the membrane thickness, thereby reduced the heat loss of the membrane. Accordingly, the results of performance tests for the membrane distillation (MD) showed that by adding 0.5% SIA nanoparticles to the membrane bulk and coating the surface with 0.5% SIA nanoparticles in 1.0% PDMS solution and 96% increase in energy efficiency, 33% increase in water flux, as well as higher stability of salt rejection were obtained. This study proved that the application of SIA nanoparticles have a great potential to modify and improve MD performance.

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Tannic acid reinforced interfacial polymerization fabrication of internally pressurized thin-film composite hollow fiber reverse osmosis membranes with high performance

Wang

Liu

et al. 2022

Desalination

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Defect free hollow fiber reverse osmosis membranes by combining layer-by-layer and interfacial polymerization

Cited by 27 publications

References 29 publications

Increasing the success rate of interfacial polymerization on hollow fibers by the single-step addition of an intermediate layer

Increasing the success rate of interfacial polymerization on hollow fibers by the single-step addition of an intermediate layer

On performance of polycarbonate/silica aerogel nanoparticle mixed matrix hollow fiber membrane coated with polydimethylsiloxane for membrane distillation

Tannic acid reinforced interfacial polymerization fabrication of internally pressurized thin-film composite hollow fiber reverse osmosis membranes with high performance

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