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Title: Tailoring pore structure of ultralight electrospun sponges by solid templating
Authors : Deuber, Fabian
Mousavi, Sara
Hofer, Marco
Adlhart, Christian
Published in : ChemistrySelect
Volume(Issue) : 1
Issue : 18
Pages : 5595
Pages to: 5598
Publisher / Ed. Institution : Wiley
Publisher / Ed. Institution: Hoboken, New Jersey
Issue Date: 13-Oct-2016
License (according to publishing contract) : CC BY-NC-ND 4.0: Attribution - Non commercial - No derivatives 4.0 International
Type of review: Not specified
Language : English
Subjects : Electrospinning; Aerogel; Nanostructures; Freeze-casting
Subject (DDC) : 660: Chemical engineering
Abstract: Freeze-casted nanofiber based sponges or aerogels exhibit a hierarchical porous structure. Pore formation is only partially understood. Therefore, we studied the underlying solid templating mechanism. We were able to tailor the secondary pore size between 9.5 and 123 µm while retaining the smaller primary pores known from electrospun nanofiber membranes. To understand the effect of microstructure on the sponges’ bulk properties, mass flow through the pores and interaction with the sponges’ internal surface were investigated. By solely altering the sponges’ microstructure we indeed found tunability in permeability by a factor 7 and in filtration efficiency by a factor of 220. Hence, pore architecture of nanofiber based sponges is a key element for their performance. The selected pullulan/PVA polymer blends and aqueous electrospinning conditions are benign and allow the facile adaptation of these ultralight highly porous sponges for a large number of applications.
Departement: Life Sciences and Facility Management
Organisational Unit: Institute of Chemistry and Biotechnology (ICBT)
Publication type: Article in scientific Journal
DOI : 10.1002/slct.201601084
ISSN: 2365-6549
Appears in Collections:Publikationen Life Sciences und Facility Management

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