Biosynthesis and characterization of bacterial cellulose membranes presenting relevant characteristics for air/gas filtration

Fatima, Arooj; Ortiz-Albo, Paloma; Neves, Luísa A.; Nascimento, Francisco X.; Crespo, João G.

http://hdl.handle.net/10362/154554

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Autores

Fatima, Arooj

Ortiz-Albo, Paloma

Neves, Luísa A.

Nascimento, Francisco X.

Crespo, João G.

Resumo(s)

The production of bacterial cellulose has gained prominence in recent years as an alternative for the sustainable production of materials that might be used in diverse processes and applications. The present study discusses the possibility of producing tailored bacterial cellulose membranes in situ, that present relevant characteristics for potential use in air/gas filtration. Various cultivation processes and characterization studies were performed to ascertain the suitability of Komagataeibacter sp. FXV3, Komagataeibacter sp. NFXK3, and K. intermedius LMG 18909 bacterial strains to produce cellulose membranes with diverse properties. Subsequently, the bacterial cellulose films produced were freeze-dried to obtain stable membranes, and extensively characterized for their physicochemical properties. The results obtained showed that different strains enabled the synthesis of membranes with distinctive morphological properties. Moreover, the different carbon sources and ethanol concentrations employed in the cultivation media led to modifications in the cellulose membranes produced by the different Komagataeibacter strains, which further impacted membrane morphology and, ultimately, gas filtration behavior. All the synthesized membranes were fully characterized, showing adequate mechanical properties, and tested for permeance of N2, CO2 and O2, opening perspectives for their use in air/gas filtration.

Descrição

Funding Information: This work was supported by the Associate Laboratory LS4FUTURE which are financed by Portuguese national funds from the Fundação para a Ciência e Tecnologia (FCT/MCTES, Portugal) ( LA/P/0087/2020). Arooj Fatima acknowledges FCT for PhD grant reference 2021.07557. BD. The authors acknowledge Professor Vítor D. Alves, from Instituto Superior de Agronomia, Universidade de Lisboa , for the support in the analysis of membrane mechanical properties. Publisher Copyright: © 2023

Palavras-chave

3D porous morphology Air/gas filtration Bacterial cellulose Komagataeibacter Porous membranes Biochemistry General Materials Science Physical and Theoretical Chemistry Filtration and Separation SDG 12 - Responsible Consumption and Production