The Thin-Film Composite Membrane: Principles, Productions and Applications

A special issue of Membranes (ISSN 2077-0375). This special issue belongs to the section "Membrane Applications for Other Areas".

Deadline for manuscript submissions: 28 February 2025 | Viewed by 1426

Special Issue Editors


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Guest Editor
Department of Chemical Engineering, Engineering College, Federal University of Minas Gerais, Belo Horizonte, MG CEP 31270-901, Brazil
Interests: advanced properties and the application of polymeric membranes

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Guest Editor
Department of Exact Sciences and Engineering, University of Caxias do Sul – Francisco Getúlio Vargas St, Caxias do Sul, RS 1130, Brazil
Interests: membrane separation processes (PSM); numerical simulation; effluent treatment; biopolymer production; adsorption; gas separation; whey treatment

Special Issue Information

Dear Colleagues,

The use of thin-film composite (TFC) membranes has broadened the application of membranes in a wide variety of processes, from liquid to gas separation. This unique morphology, in which a thin layer is deposited over a porous sublayer, has made the increase in membrane fluxes feasible due to the thickness of the top layer combined with the possibility of having high selectivity, since different materials can be used. The phase inversion technique is the basis for preparing such membranes, and it can also be combined with other membrane preparation routes. Although TFC is known as the ideal morphology, the need for high performance membranes is still of the utmost importance. Chemical resistance, antifouling, and mechanical properties are highly dependent on better membrane preparation routes. Thus, the purpose of this Special Issue of Membranes is to present the state-of-the-art of TFC preparation, with a focus on the effect of variables in membrane preparation, how to bind the gap between bench-scale and industrial preparation routes, and on the applications of such separation systems. 

Original research papers, reviews, and communications on TFC principles, production, and applications are welcome. The scope of papers should be (but is not limited to) the effects of process parameters on TFC membranes, simulation of phase separation and/or other methods such as in situ polymerization, new applications of TFC membranes other than desalination, evaluation of large-scale TFC membrane preparation with maintenance of properties, and studies on the recyclability of TFC membranes in special green chemistry applications.

Prof. Dr. Kátia Cecília de Souza Figueiredo
Prof. Dr. Camila Baldasso
Guest Editors

Manuscript Submission Information

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Keywords

  • antifouling membranes
  • phase inversion
  • polymerization
  • recyclation of membranes
  • TFC large-scale preparation

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Published Papers (1 paper)

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Research

24 pages, 7437 KiB  
Article
Investigation of the Ternary System, Water/Hydrochloric Acid/Polyamide 66, for the Production of Polymeric Membranes by Phase Inversion
by Jocelei Duarte, Camila Suliani Raota, Camila Baldasso, Venina dos Santos and Mara Zeni
Membranes 2025, 15(1), 7; https://doi.org/10.3390/membranes15010007 - 1 Jan 2025
Viewed by 767
Abstract
The starting point for the preparation of polymeric membranes by phase inversion is having a thermodynamically stable solution. Ternary diagrams for the polymer, solvent, and non-solvent can predict this stability by identifying the phase separation and describing the thermodynamic behavior of the membrane [...] Read more.
The starting point for the preparation of polymeric membranes by phase inversion is having a thermodynamically stable solution. Ternary diagrams for the polymer, solvent, and non-solvent can predict this stability by identifying the phase separation and describing the thermodynamic behavior of the membrane formation process. Given the lack of data for the ternary system water (H2O)/hydrochloric acid (HCℓ)/polyamide 66 (PA66), this work employed the Flory–Huggins theory for the construction of the ternary diagrams (H2O/HCℓ/PA66 and H2O/formic acid (FA)/PA66) by comparing the experimental data with theoretical predictions. Pure polymer and the membranes produced by phase inversion were characterized to provide the information required to create the ternary diagrams. PA66/FA and PA66/HCℓ solutions were also evaluated regarding their classification as true solutions, and the universal quasi-chemical functional group activity coefficient (UNIFAC) method was used for determining non-solvent/solvent interaction parameters (g12). Swelling measurements determined the polymer/non-solvent interaction parameter (χ13) for H2O/PA66 and the solvent/polymer interaction parameter (χ23) for PA66/FA and PA66/HCℓ. The theoretical cloud point curve was calculated based on “Boom’s LCP Correlation” and compared to the curve of the experimental cloud point. The ternary Gibbs free energy of mixing and χ23 indicated FA as the best solvent for the PA66. However, for HCℓ, the lower concentration (37–38%), volatility, and fraction volume of dissolved PA66 (ϕ3) indicated that HCℓ is also adequate for PA66 solubilization based on the similar membrane morphology observed when compared to the PA66/FA membrane. Full article
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Solar-Driven Membrane Distillation Crystallization: Advances and Applications in Membrane Technology

Authors: Bárbara C. Ricci, Guilherme Jésus Moreira Diniz, Gabriel Reis Pintaúde, and Cristiana Brasil Maia

Affiliation: Pontifícia Universidade Católica de Minas Gerais - Engineering School, Building 03, Rua Dom José Gaspar, 500 - Coração Eucarístico, 30535-901, Belo Horizonte, Minas Gerais, Brazil

 

Title: Effect of Storage Time on Structure and Performance of Hybrid Polysulfone Membranes with Graphene Nanoplatelets

Authors: Nathália Ferronato Livinalli, Jocelei Duarte, Wendel Paulo Silvestre *, Camila Baldasso

Affiliation: Postgraduate Program in Process and Technologies Engineering (PGEPROTEC), University of Caxias do Sul, Caxias do Sul, RS, Brazil

 

Title: Investigation of the ternary system water/hydrochloric acid/polyamide 66 for the production of polymeric membranes by phase inversion

Authors: Jocelei Duarte*, Camila Suliani Raota, Camila Baldasso, Venina dos Santos, and Mara Zeni

Affiliation: Postgraduate Program in Process and Technologies Engineering (PGEPROTEC), University of Caxias do Sul, Caxias do Sul, RS, Brazil

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