PVC Membranes Prepared via Non-Solvent Induced Phase Separation Process

Padilha, Liana Franco; Borges, Cristiano Piacsek

doi:10.1590/0104-6632.20190361s20170132

Cited by 12 publications

(2 citation statements)

References 25 publications

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“…In Table 3, the diffusivity values for non-solvent-solvent and non-solvent in various solvents are shown. The solventnon-solvent diffusivity has a value of 1.3397 -5 -1.0894 -5 , a higher value of D(s-water) causes a faster exchange rate between solvent and non-solvent which can be called instantous demixing (Padilha & Borges, 2019).…”

Section: Diffusivitymentioning

confidence: 99%

Kinetic and Thermodynamic Studies in Cellulose Acetate-Polybutylene Succinate(CA-PBS)/Single Solvent/Water System for Desalination Membrane

Nyamiati

Nurkhamidah

Rahmawati

et al. 2023

Eksergi

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The most important part of the membrane synthesis process so that it has the desired pores is the solidification process of the membrane, the process begins with a change from one liquid phase into two liquid phases (liquid-liquid demixing). At a certain period during demixing, the polymer-rich phase solidifies; thus, a dense membrane matrix is formed. Parameters that determine the mechanism of membrane formation are based on thermodynamics including phase separation of Solvent-Polymer-Non-solvent which is explained through a phase diagram (Flory-Huggins Theory). This study aims to determine the initial prediction of the formation of CA-PBS membranes with various solvents used and variations of non-solvents in the best system, which is proven by its characteristics and performance when applied to desalination membranes which include ternary diagrams using cloud point data, solubility parameters with Hansesn solubility, the solvent-non-solvent diffusivity using the Tyn Calus Equation approach and the morphological proofing of the membrane through SEM photos, and the performance of the resulting membrane through salt rejection and permeate flux. The results of the difference in solubility parameters are can be predicted that using DMF solvent on the CA-PBS membrane can reduce the pore size and eliminate voids and macrovoids in the membrane morphology.

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Section: Diffusivitymentioning

confidence: 99%

Kinetic and Thermodynamic Studies in Cellulose Acetate-Polybutylene Succinate(CA-PBS)/Single Solvent/Water System for Desalination Membrane

Nyamiati

Nurkhamidah

Rahmawati

et al. 2023

Eksergi

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“…The increase in PSF concentration will help to improve membrane selectivity. Water was used as a non-solvent bath as DMAc and PEG are easily soluble in water [39,46] and helps to add porosity to the membrane. The increase in PSF concentration and use of PEG changes gelation kinetics.…”

Section: Materials Selectionmentioning

confidence: 99%

Acid-Modified ZnO Nanoparticles Embedded Polysulfone Membranes for Separation of Copper from Industrial Wastewater

Chendake¹,

Mahajan-Tatpate²,

Dhume³

et al. 2022

Int. J. Membrane Sci. Techno.

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Copper is one of the crucial materials for the biological activity of human beings and is known for antimicrobial properties during wound management. Hence its presence in the effluent is overlooked although it is reported to be detrimental at higher concentrations. Its effect on humans varies from simple dizziness, diarrhea to liver/kidney damage, etc. Various techniques are reported for separation of these toxic pollutants from effluent. This article focuses on development of polysulfone-based membranes with use of additives: polyethylene glycol (PEG) and ZnO nanoparticles (NPs) (nascent and modified with HCl) for separation of copper from effluent by Donnan Exclusion principle. The incorporation of acid treated ZnO NPs in membrane matrix provides surface charge to membrane. This results in repulsive interaction with copper salts from process which retained in retentate as per Donnan exclusion principle. The membrane formed with 40% PSF- 0.8% ZnO NPs shows the rejection of copper up to 40%, which raises to 61% when instead of nascent NPs, HCl treated NPs were used. The rejection efficiency of the membrane raises up to 90% when PEG was used along with PSF and ZnO NPs (acid treated). The use of modified NPs in membrane matrix has strong impact on membrane morphology and rejection efficiency. The modification of surface charge properties and morphological distribution of NPs is supported by FTIR and EDX. Further the separation works upon physical distribution of NPs, which would help to maintain the stability properties of PSF based membrane enhancing its applicability in actual process conditions.

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Reliable and efficient membrane processes for clean and sustainable production of fresh water from saline waste

Ouchn,

Chaouqi,

Avci

et al. 2024

J of Chemical Tech & Biotech

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BACKGROUNDIncreasing water scarcity due to growing demand highlights the urgency for innovative solutions. Seawater desalination is emerging as a crucial answer, with direct contact membrane distillation (DCMD) emerging as a promising technology in this context. In particular, membranes produced from ionic liquids constitute a well‐established avenue for the preparation of membranes by non‐solvent phase inversion (NIPS) in the field of desalination.RESULTSThe tests carried out as part of the DCMD, using PVDF membranes modified with the IL MPF6 and TBAPF6 synthesized during this study, in particular those containing 50% TBAFP6, demonstrate a notable improvement in hydrophobicity and porosity (121,48°, 79%). The results suggest that the flux of the PVDF‐TBAPF6 membrane shows a clear improvement of 300% compared to the support alone. Various parameters such as salinity, temperature and flow rate were examined, highlighting their impact on membrane performance. The low energy parameters (Ea = 43,36 Kj/mol, ΔH≠ = 40,86 Kj/mol) indicate a diffusion mechanism of vapor molecules, occurring by successive jumps through the IL interaction sites.CONCLUSIONExtensive experimental investigations have carefully anticipated the permeate flow in DCMD, aiming to efficiently extract pure water. DCMD is positioned as a promising technology for desalination and treatment of BRINE solutions. Therefore, this study can make a significant contribution to the expansion of DCMD by facilitating the prediction and optimization of operational parameters, thereby paving the way for expanded application of this technology.This article is protected by copyright. All rights reserved.

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PVC Membranes Prepared via Non-Solvent Induced Phase Separation Process

Cited by 12 publications

References 25 publications

Kinetic and Thermodynamic Studies in Cellulose Acetate-Polybutylene Succinate(CA-PBS)/Single Solvent/Water System for Desalination Membrane

Kinetic and Thermodynamic Studies in Cellulose Acetate-Polybutylene Succinate(CA-PBS)/Single Solvent/Water System for Desalination Membrane

Acid-Modified ZnO Nanoparticles Embedded Polysulfone Membranes for Separation of Copper from Industrial Wastewater

Reliable and efficient membrane processes for clean and sustainable production of fresh water from saline waste

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