Rapid preparation of electrospun nanofibre sponges through supercritical CO2 drying

Mol, Gioele; Fialová, Christina; Adlhart, Christian

doi:10.1039/D3MA00781B

Please use this identifier to cite or link to this item: https://doi.org/10.21256/zhaw-30677

Publication type:	Article in scientific journal
Type of review:	Peer review (publication)
Title:	Rapid preparation of electrospun nanofibre sponges through supercritical CO2 drying
Authors:	Mol, Gioele Fialová, Christina Adlhart, Christian
et. al:	No
DOI:	10.1039/D3MA00781B 10.21256/zhaw-30677
Published in:	Materials Advances
Volume(Issue):	5
Issue:	9
Page(s):	3929
Pages to:	3939
Issue Date:	2024
Publisher / Ed. Institution:	Royal Society of Chemistry
ISSN:	2633-5409
Language:	English
Subjects:	Nanofibre aerogel; Critical point drying; Supercritical CO2; Nanofibre sponges; Freeze-drying; Filtration mechanism; Microplastics
Subject (DDC):	660: Chemical engineering
Abstract:	Nanofibre sponges (NFS) – also known as nanofibre aerogels – are an intriguing class of ultralight, highly porous and flexible materials currently produced by self-assembly of prefabricated nanofibre building blocks. The synthesis of NFS involves a time-consuming freeze-drying step. Here, we report a fast method for the preparation of NFS using rapid critical point drying (CPD). Highly porous NFS were prepared from electrospun polyamid-6 (PA6) nanofibres by conventional freeze-drying and CPD with supercritical CO2 (scCO2). Their microscopic architecture and macroscopic properties such as mechanical strength, permeability, and liquid filtration properties towards microplastics were compared and a filtration mechanism was elaborated. Processing time was significantly reduced from a 48-hour drying step to < 1 h by using CPD. The final nanofibre sponges were similar in porosity and mechanical strength, but their microscopic architecture and filtration behaviour (99.4 % to 99.998 %) were distinctive. The CPD process, already industrially used for the preparation of silica aerogels, has the potential for large-scale fabrication of nanofibre-based porous materials. Moreover, CPD is considered as an additional tool for tuning the microscopic architecture of such materials to the desired application.
URI:	https://digitalcollection.zhaw.ch/handle/11475/30677
Fulltext version:	Published version
License (according to publishing contract):	CC BY 3.0: Attribution 3.0 Unported
Departement:	Life Sciences and Facility Management
Organisational Unit:	Institute of Chemistry and Biotechnology (ICBT)
Appears in collections:	Publikationen Life Sciences und Facility Management

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Mol, G., Fialová, C., & Adlhart, C. (2024). Rapid preparation of electrospun nanofibre sponges through supercritical CO2 drying. Materials Advances, 5(9), 3929–3939. https://doi.org/10.1039/D3MA00781B

Mol, G., Fialová, C. and Adlhart, C. (2024) ‘Rapid preparation of electrospun nanofibre sponges through supercritical CO2 drying’, Materials Advances, 5(9), pp. 3929–3939. Available at: https://doi.org/10.1039/D3MA00781B.

G. Mol, C. Fialová, and C. Adlhart, “Rapid preparation of electrospun nanofibre sponges through supercritical CO2 drying,” Materials Advances, vol. 5, no. 9, pp. 3929–3939, 2024, doi: 10.1039/D3MA00781B.

MOL, Gioele, Christina FIALOVÁ und Christian ADLHART, 2024. Rapid preparation of electrospun nanofibre sponges through supercritical CO2 drying. Materials Advances. 2024. Bd. 5, Nr. 9, S. 3929–3939. DOI 10.1039/D3MA00781B

Mol, Gioele, Christina Fialová, and Christian Adlhart. 2024. “Rapid Preparation of Electrospun Nanofibre Sponges through Supercritical CO2 Drying.” Materials Advances 5 (9): 3929–39. https://doi.org/10.1039/D3MA00781B.

Mol, Gioele, et al. “Rapid Preparation of Electrospun Nanofibre Sponges through Supercritical CO2 Drying.” Materials Advances, vol. 5, no. 9, 2024, pp. 3929–39, https://doi.org/10.1039/D3MA00781B.