Fabrication of PDMS based membranes with improved separation efficiency in hydrophobic pervaporation

Kujawska, Anna; Knozowska, Katarzyna; Kujawa, Joanna; Li, Guoqiang; Kujawski, Wojciech

doi:10.1016/j.seppur.2019.116092

Cited by 37 publications

(26 citation statements)

References 62 publications

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“…The increase in CA is due to the formation of the elective PDMS layer on the outer surface of hollow fiber substrate. Our results are in agreement with the literature values of CA of PDMS membranes [ 51 , 52 , 53 , 54 ]. Knozowska et al [ 51 ] and Kujawska et al [ 52 ] found that the CA of flat sheet pristine PDMS membrane was 115°.…”

Section: Resultssupporting

confidence: 93%

“…Our results are in agreement with the literature values of CA of PDMS membranes [ 51 , 52 , 53 , 54 ]. Knozowska et al [ 51 ] and Kujawska et al [ 52 ] found that the CA of flat sheet pristine PDMS membrane was 115°. While Khorasani et al [ 53 ] and Lin et al [ 54 ] found that the CAs of native PDMS membranes were 105° and 108°, respectively.…”

Section: Resultssupporting

confidence: 93%

“…While Khorasani et al [ 53 ] and Lin et al [ 54 ] found that the CAs of native PDMS membranes were 105° and 108°, respectively. It was reported that the wide range of CA values (95°–120°) for PDMS samples results from various experimental conditions, such as surface roughness and type of the substrate surface [ 52 ].…”

Section: Resultsmentioning

confidence: 99%

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The Effects of PEI Hollow Fiber Substrate Characteristics on PDMS/PEI Hollow Fiber Membranes for CO2/N2 Separation

Kujawski

Knozowska

et al. 2021

Membranes

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The CO2 separation from flue gas based on membrane technology has drawn great attention in the last few decades. In this work, polyetherimide (PEI) hollow fibers were fabricated by using a dry-jet-wet spinning technique. Subsequently, the composite hollow fiber membranes were prepared by dip coating of polydimethylsiloxane (PDMS) selective layer on the outer surface of PEI hollow fibers. The hollow fibers spun from various spinning conditions were fully characterized. The influence of hollow fiber substrates on the CO2/N2 separation performance of PDMS/PEI composite membranes was estimated by gas permeance and ideal selectivity. The prepared composite membrane where the hollow fiber substrate was spun from 20 wt% of dope solution, 12 mL/min of bore fluid (water) flow rate exhibited the highest ideal selectivity equal to 21.3 with CO2 permeance of 59 GPU. It was found that the dope concentration, bore fluid flow rate and bore fluid composition affect the porous structure, surface morphology and dimension of hollow fibers. The bore fluid composition significantly influenced the gas permeance and ideal selectivity of the PDMS/PEI composite membrane. The prepared PDMS/PEI composite membranes possess comparable CO2/N2 separation performance to literature ones.

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Section: Resultssupporting

confidence: 93%

Section: Resultssupporting

confidence: 93%

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The Effects of PEI Hollow Fiber Substrate Characteristics on PDMS/PEI Hollow Fiber Membranes for CO2/N2 Separation

Kujawski

Knozowska

et al. 2021

Membranes

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“…The reported mean removal was 8.5%, 11.7%, and 18.7% for Cd, Cu, Ni, and Pb, respectively. [55][56][57][58][59] To test the impact and effectiveness of the MD process using the prepared membranes, it is interesting to note that similar trend of flux over time was noted as can be seen in Figure S2. Doped SBS membrane had the highest water flux followed by the neat SBS, doped PVDF, and pristine PVDF, respectively.…”

Section: Dcmd Performancementioning

confidence: 82%

“…However, in the study by Mahdavi et al, Cu, Ni, and Pb were adsorbed using Al 2 O 3 at a pH of 5. The reported mean removal was 8.5%, 11.7%, and 18.7% for Cd, Cu, Ni, and Pb, respectively 55‐59 …”

Section: Resultsmentioning

confidence: 99%

Electrospun Al ₂ O ₃ hydrophobic functionalized membranes for heavy metal recovery using direct contact membrane distillation

Khraisheh

Almomani

2020

Int J Energy Res

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In this study, styrene-butadiene-styrene (SBS) was used to develop a novel functionalized electrospun membrane for the effective treatment of heavy metals in direct contact membrane distillation (DCMD) applications. Functionalization was achieved by the addition (doping) of the super hydrophobic Al 2 O 3 nanoparticles (Al NPs) within the matrix of the membrane during electrospinning. Neat (pristine nondoped) and doped SBS membranes were tested. The performance of the SBS membranes were also compared with fabricated polyvinylidene fluoride membranes with and without doping with Al NPs. The membrane characteristics were tested via Fourier transform infrared, scanning electron microscopy, pore size, and porosity investigations. The wettability of the membranes was investigated with respect to the liquid entry pressure (LEP) and contact angle. The performance of the membranes was tested in a DCMD setting for its ability to treat water containing salt (NaCl) and heavy metals (Cr (VI), Cd, Pb) in various concentration in a single and multicomponent systems. The SBS member exhibited excellent hydrophobicity characteristics such as a high LEP (16.87 psi) and contact angle (141 ± 2 ). It also had superior permeate flux rate compared to the other prepared membranes (54.4 LMH). The addition of the Al 2 O 3 nanoparticles enhance the performance of the membranes substantially.Slight decline in the flux was observed after 14 hours of continuous operating time that could be attributed to agglomeration, adsorption, or temperature polarization effects. The SBS AL NPs membranes also demonstrated excellent flux for saline solutions of varied concentrations with 99% salt rejection.

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Preparation of polyphenylsulfone/graphene nanocomposite membrane for the pervaporation separation of cumene from water

Rostami

Saljoughi

Mousavi

et al. 2021

Polymers for Advanced Techs

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Polyphenylsulfone (PPSU) was applied for the first time in the hydrophobic PV process. Nanocomposite membranes of PPSU/graphene (Gr) nanosheets were prepared and used to separate isopropyl benzene (cumene) from water via pervaporation (PV).Analysis of the mechanical properties of the membranes showed that the tensile strength and Young's modulus had an increasing trend with the incorporation of Gr into PPSU. The water contact angle of the membranes had a rising trend with the addition of Gr, confirming the improved hydrophobicity of membranes. In the PV experiments, the membrane containing 3.5 wt% Gr provided the highest separation factor, which was 4.5-fold as much as that of the neat PPSU membrane. Cumene separation from water by the PPSU/3.5 wt% Gr membrane was associated with the total flux of 132.73 gMH, the separation factor of 1566.36, and the PSI of 208,124.8 gMH.

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Fabrication of PDMS based membranes with improved separation efficiency in hydrophobic pervaporation

Cited by 37 publications

References 62 publications

The Effects of PEI Hollow Fiber Substrate Characteristics on PDMS/PEI Hollow Fiber Membranes for CO2/N2 Separation

The Effects of PEI Hollow Fiber Substrate Characteristics on PDMS/PEI Hollow Fiber Membranes for CO2/N2 Separation

Electrospun Al ₂ O ₃ hydrophobic functionalized membranes for heavy metal recovery using direct contact membrane distillation

Preparation of polyphenylsulfone/graphene nanocomposite membrane for the pervaporation separation of cumene from water

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Fabrication of PDMS based membranes with improved separation efficiency in hydrophobic pervaporation

Cited by 37 publications

References 62 publications

The Effects of PEI Hollow Fiber Substrate Characteristics on PDMS/PEI Hollow Fiber Membranes for CO2/N2 Separation

The Effects of PEI Hollow Fiber Substrate Characteristics on PDMS/PEI Hollow Fiber Membranes for CO2/N2 Separation

Electrospun Al 2 O 3 hydrophobic functionalized membranes for heavy metal recovery using direct contact membrane distillation

Preparation of polyphenylsulfone/graphene nanocomposite membrane for the pervaporation separation of cumene from water

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Product

Resources

About

Electrospun Al ₂ O ₃ hydrophobic functionalized membranes for heavy metal recovery using direct contact membrane distillation