PVDF hollow fiber membranes prepared from green diluent via thermally induced phase separation: Effect of PVDF molecular weight

Hassankiadeh, Naser Tavajohi; Cui, Zhaoliang; Kim, Ji Hoon; Shin, Dong Won; Sanguineti, A.; Arcella, V.; Lee, Young Moo; Drioli, Enrico

doi:10.1016/j.memsci.2014.07.060

Cited by 104 publications

(60 citation statements)

References 29 publications

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“…In the Supporting Information, it can be seen that the incorporation of HFP groups resulted in a decrease in viscosity in the polymer solutions. The viscosity of a polymer solution has a significant impact on mass transfer and heat transfer in the nascent membrane . The lower viscosity of polymer solutions facilitates polymer chain movement and droplet growth, which means the system has a lower T c .…”

Section: Resultsmentioning

confidence: 99%

Fabrication and properties of PVDF and PVDF‐HFP microfiltration membranes

Wang

Liu

Huang

et al. 2018

J of Applied Polymer Sci

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Poly(vinylidene fluoride) (PVDF) and poly(vinylidene fluoride)‐co‐hexafluoropropylene (PVDF‐HFP) were used to fabricate porous microfiltration membranes via a thermally induced phase separation (TIPS) method, and dibutyl phthalate (DBP) was used as diluent. The effects of polymer concentration on structure and performance were studied in detail. In addition, the effect of incorporation of hexafluoropropylene (HFP) groups on the membrane was also investigated. The formation mechanism was proposed with the assistance of a phase diagram. The results showed that the incorporation of HFP groups resulted in a lower crystallization temperature (Tc) of the polymer/DBP system. In addition, the porosity, pure water flux, and ink solution flux decreased with increasing polymer concentration. In contrast, the water contact angle, ink rejection ratio, and mechanical properties had an increasing tendency. When the polymer concentration was 30 wt %, the obtained membrane was most suitable for microfiltration. Furthermore, the incorporation of HFP groups improved the properties of the obtained membrane, including better hydrophobicity, mechanical properties, antifouling property, and chemical resistance. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46711.

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Section: Resultsmentioning

confidence: 99%

Fabrication and properties of PVDF and PVDF‐HFP microfiltration membranes

Wang

Liu

Huang

et al. 2018

J of Applied Polymer Sci

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“…Ra and Rq of PVDF membrane are 36.85 and 50.90 nm, and Ra and Rq of PVDF/PES-C membrane are 43.51 and 54.64 nm. The roughness of two membranes is relatively low [30] and the effect of roughness on membrane fouling is negligible in our study.…”

Section: Sewage Flux Comparison Of Pvdf Membrane and Pvdf/pes-c Membranementioning

confidence: 63%

Structure and properties of PVDF membrane with PES-C addition via thermally induced phase separation process

Sun

2014

Applied Surface Science

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“…Hassankiadeh et al investigated the effect of polymer molecular weight on the final membrane performance for a PVDF/tributyl O‐acetyl citrate (ATBC) binary system. Hollow fiber membranes were fabricated using the TIPS process with different PVDF molecular weights and different preparation conditions.…”

Section: Thermally Induced Phase Separationmentioning

confidence: 99%

Thermally induced phase separation and electrospinning methods for emerging membrane applications: A review

et al. 2015

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In this review, thermally induced phase separation (TIPS) and electrospinning methods for preparation of fluoropolymer membranes are assessed, particularly for the polyvinylidene fluoride (PVDF) and polyethylene chlorotrifluoroethylene membranes. This review focuses on controlling the membrane morphology from the thermodynamic and kinetic perspectives to understand the relationship between the membrane morphology and fabrication parameters. In addition, the current status of the nonsolvent induced phase separation (NIPS) method and the combined NIPS-TIPS (N-TIPS) method, which is a new emerging fabrication method, are discussed. The past literature data are compiled and an upperbound curve (permeability vs. tensile strength) is proposed for the TIPS-prepared PVDF membranes. Furthermore, the key parameters that control and determine the membrane morphology when using the electrospinning method are reviewed. Exploiting the unique advantages of the electrospinning method, our current understanding in controlling and finetuning the PVDF crystal polymorphism (i.e., b-phase) is critically assessed. V C 2015 American Institute of Chemical Engineers AIChE J, 62: 461-490, 2016 Figure 15. Cross section of 40 wt % PVDF/GBL hollow fiber membranes: (left) with LiCl additive, (middle) with glycerol additive, (right) with LiCl and glycerol additives.Formation of such fine pores nearly doubled the flux without losing mechanical strength. 28 481 TEM images of 4 wt % PVP nanofibers from different compositions of EtOH/DMF: (b) 65/35, (c) 50/50, (d) 35/65, and (e) SEM image of 4 wt % PVP nanofibers using EtOH/DMF (50/50). 146 482

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PVDF hollow fiber membranes prepared from green diluent via thermally induced phase separation: Effect of PVDF molecular weight

Cited by 104 publications

References 29 publications

Fabrication and properties of PVDF and PVDF‐HFP microfiltration membranes

Fabrication and properties of PVDF and PVDF‐HFP microfiltration membranes

Structure and properties of PVDF membrane with PES-C addition via thermally induced phase separation process

Thermally induced phase separation and electrospinning methods for emerging membrane applications: A review

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