Deposition of a polymeric porous superhydrophobic thin layer on the surface of poly(vinylidenefluoride) hollow fiber membrane

Ahmad, A.L.; Mohammed, Harith N.; Ooi, B. S.; Leo, C.P.

doi:10.2478/pjct-2013-0036

Cited by 19 publications

(10 citation statements)

References 22 publications

(6 reference statements)

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“…These properties make them better alternatives for carbon capture applications. Ahmad et al (2013) deposited a superhydrophobic layer of lowdensity polyethylene (LDPE) onto poly(vinylidene fluoride) (PVDF). The material developed was porous with a 152 ± 3.2 water contact angle and maintained a higher CO 2 flux than the unamended PVDF membrane.…”

Section: Gas Membrane Contactorsmentioning

confidence: 99%

Membrane-based carbon capture from flue gas: a review

Khalilpour

Mumford

Zhai

et al. 2015

Journal of Cleaner Production

314

126

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Section: Gas Membrane Contactorsmentioning

confidence: 99%

Membrane-based carbon capture from flue gas: a review

Khalilpour

Mumford

Zhai

et al. 2015

Journal of Cleaner Production

314

126

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“…A solid layer was present for all polymer coating weight concentrations, confirming the presence of a PP layer on the surface. However, there seemed to be a crack formation for 10 mg mL −1 , which could be the result of the instability of MEK with PP during the phase separation, leading to an uneven coating of the surface [38]. Tomar et al suggest that this phenomenon is possible to happen during the drying of the polymer substrate after it is coated [39].…”

Section: Pp Coating Solution Interaction With and Without The Non-solvent Pvdf Hollow Fiber Membrane Surface Morphologymentioning

confidence: 99%

Non-Solvent Influence of Hydrophobic Polymeric Layer Deposition on PVDF Hollow Fiber Membrane for CO2 Gas Absorption

2021

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The implementation of hydrophobicity on membranes is becoming crucial in current membrane technological development, especially in membrane gas absorption (MGA). In order to prevent membrane wetting, a polypropylene (PP) dense layer coating was deposited on a commercial poly(vinylidene fluoride) (PVDF) hollow fiber membrane as a method of enhancing surface hydrophobicity. The weight concentration of PP pellets was varied from 10 mg mL−1 to 40 mg mL−1 and dissolved in xylene. A two-step dip coating was implemented where the PVDF membrane was immersed in a non-solvent followed by a polymer coating solution. The effects of the modified membrane with the non-solvent methyl ethyl ketone (MEK) and without the non–solvent was investigated over all weight concentrations of the coating solution. The SEM investigation found that the modified membrane surface transfiguration formed microspherulites that intensified as PP concentration increased with and without MEK. To understand the coating formation further, the solvent–non-solvent compatibility with the polymer was also discussed in this study. The membrane characterizations on the porosity, the contact angle, and the FTIR spectra were also conducted in determining the polymer coating properties. Hydrophobic membrane was achieved up to 119.85° contact angle and peak porosity of 87.62% using MEK as the non-solvent 40 mg mL−1 PP concentration. The objective of the current manuscript was to test the hydrophobicity and wetting degree of the coating layer. Hence, physical absorption via the membrane contactor using CO2 as the feed gas was carried out. The maximum CO2 flux of 3.33 × 10−4 mol m−2 s−1 was achieved by 25 mg modified membrane at a fixed absorbent flow rate of 100 mL min−1 while 40 mg modified membrane showed better overall flux stability.

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“…Studies have shown that using special methods to deposit hydrophobic inorganic nanoparticles on hollow fiber membranes can obtain superhydrophobic hollow fiber membranes with strong longterm stability [11,12]. Zhang et al [13] developed a highly hydrophobic organic-inorganic composite hollow fiber membrane by incorporating a fluorinated silica inorganic (fSiO2)layer on a polyetherimide (PEI) organic membrane substrate via sol-gel process.…”

Section: Introductionmentioning

confidence: 99%

Long-Term Stability of PVDF-SiO2-HDTMS Composite Hollow Fiber Membrane For Carbon Dioxide Absorption in Gas–Liquid Contacting Process

Pang

Qiu

Wei-peng³

2021

Preprint

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To obtain a long-term stable operation of the hollow fiber membrane for using in membrane contact absorption of carbon dioxide (CO2), hybrid polyvinylidene fluoride-silica-hexadecyltrimethoxysilane (PVDF-SiO2-HDTMS) membrane were fabricated via the non-solvent induced phase-inversion method. The surface properties, performance characteristics and long-term stable operation performance of the prepared membranes were compared and analyzed. The results show the outer surface of the prepared membranes exhibited superhydrophobicity because of the formation of rough nano-scale microstructures and the low surface free energy. Due to the addition of inorganic nanoparticles, the mechanical strength of PVDF-SiO2-HDTMS membranes were improved. The long-term stable operation experiments were carried out with the inlet gas (CO2/N2 = 19/81, v/v) at a flow rate of 20 mL/min and the absorbent liquid (1 mol/L DEA) at a flow rate of 50 mL/min. And the result showed that the mass transfer flux of PVDF-SiO2-HDTMS membrane decreased from the initial value of 2.39×10-3 mol/m2s to 2.31×10-3 mol/m2s, which was a decrease of 3% after 20 days. The main benefit is the addition of inorganic nanoparticles, which have strong chemical resistance and high hydrophobicity, thereby preventing structural damage and pore wetting of the membrane. PVDF-SiO2-HDTMS membrane exhibits excellent long-term stable operation performance of CO2.

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Deposition of a polymeric porous superhydrophobic thin layer on the surface of poly(vinylidenefluoride) hollow fiber membrane

Cited by 19 publications

References 22 publications

Membrane-based carbon capture from flue gas: a review

Membrane-based carbon capture from flue gas: a review

Non-Solvent Influence of Hydrophobic Polymeric Layer Deposition on PVDF Hollow Fiber Membrane for CO2 Gas Absorption

Long-Term Stability of PVDF-SiO2-HDTMS Composite Hollow Fiber Membrane For Carbon Dioxide Absorption in Gas–Liquid Contacting Process

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