| Titre : |
Investigation of microstructure and air permeability of aerogel-coated textile fabric materials |
| Type de document : |
texte imprimé |
| Auteurs : |
A. Fonner, Auteur ; Sadhan C. Jana, Auteur |
| Année de publication : |
2021 |
| Article en page(s) : |
p. 322-331 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Aérogels
Air
Caractérisation
Enduction textile
Filtration
Matériaux poreux
Microstructures -- Analyse
Perméabilité
Polyesters
Polyimides
Polystyrène
Séchage
Textiles et tissus synthétiques
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
This study focuses on fabrication of aerogel-coated macroporous polyester fabrics for the purposes of filtration of nanometric airborne particles and potential application in facemasks. Syndiotactic polystyrene (sPS) and polyimide (PI) gels that provide respectively majority macropores (diameter > 50 nm) and mesopores (diameter 2 to 50 nm) are coated onto woven polyester fabrics via a dip coating process. The resultant materials are supercritically dried to obtain aerogelcoated fabrics. The results show that sPS is more suitable for the dip coating process. However, evaporation of the solvent during handling of gel-coated fabrics leads to closure of the surface pores that are later recovered via solvent annealing. The resultant aerogel-coated fabrics offer high air permeability (∼10–10 m2) and high filtration efficiency (> 99.95%) of airborne sodium chloride test particles of size 25 to 150 nm. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Preparation of sol - Preparation of aerogel-coated fabric - Supercritical drying - Characterization - Air permeability and filtration efficiency
- RESULTS AND DISCUSSION : Quality of aerogel-coated fabric substrates - Aerogel coating thickness - Density and porosity - Specific surface area and porosity - Permeability - Effects of solvent annealing
- Table 1 : Thickness of sPS aerogel coating as function of retraction rate from solution followed by drying for 3 min
- Table 2 : BET surface area and pore fractions
- Table 3 : Air permeability and filtration efficiency
- Table 4 : Effect of annealing in THF vapor on fabric thickness
- Table 5 : Density and porosity data of solvent annealed specimens
- Table 6 : Surface area and pore volume fraction of annealed aerogelcoated fabric
- Table 7 : Permeability values of annealed aerogel coated fabric and commercially available personal filtration devices |
| DOI : |
https://doi.org/10.1515/ipp-2020-4095 |
| En ligne : |
https://drive.google.com/file/d/1PQEzJCBqaEWmWWTzTat875yHMb-Pl-W2/view?usp=shari [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36374 |
in INTERNATIONAL POLYMER PROCESSING > Vol. 36, N° 3 (2021) . - p. 322-331
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