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Reinforcement of bacterial cellulose aerogels with biocompatible polymers
Bacterial cellulose (BC) aerogels, which are fragile, ultra-lightweight, open-porous and transversally isotropic materials, have been reinforced with the biocompatible polymers polylactic acid (PLA), polycaprolactone (PCL), cellulose acetate (CA), and poly(methyl methacrylate) (PMMA), respectively,...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier Applied Science Publishers
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4118683/ https://www.ncbi.nlm.nih.gov/pubmed/25037381 http://dx.doi.org/10.1016/j.carbpol.2014.04.029 |
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author | Pircher, N. Veigel, S. Aigner, N. Nedelec, J.M. Rosenau, T. Liebner, F. |
author_facet | Pircher, N. Veigel, S. Aigner, N. Nedelec, J.M. Rosenau, T. Liebner, F. |
author_sort | Pircher, N. |
collection | PubMed |
description | Bacterial cellulose (BC) aerogels, which are fragile, ultra-lightweight, open-porous and transversally isotropic materials, have been reinforced with the biocompatible polymers polylactic acid (PLA), polycaprolactone (PCL), cellulose acetate (CA), and poly(methyl methacrylate) (PMMA), respectively, at varying BC/polymer ratios. Supercritical carbon dioxide anti-solvent precipitation and simultaneous extraction of the anti-solvent using scCO(2) have been used as core techniques for incorporating the secondary polymer into the BC matrix and to convert the formed composite organogels into aerogels. Uniaxial compression tests revealed a considerable enhancement of the mechanical properties as compared to BC aerogels. Nitrogen sorption experiments at 77 K and scanning electron micrographs confirmed the preservation (or even enhancement) of the surface-area-to-volume ratio for most of the samples. The formation of an open-porous, interpenetrating network of the second polymer has been demonstrated by treatment of BC/PMMA hybrid aerogels with EMIM acetate, which exclusively extracted cellulose, leaving behind self-supporting organogels. |
format | Online Article Text |
id | pubmed-4118683 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | Elsevier Applied Science Publishers |
record_format | MEDLINE/PubMed |
spelling | pubmed-41186832014-10-13 Reinforcement of bacterial cellulose aerogels with biocompatible polymers Pircher, N. Veigel, S. Aigner, N. Nedelec, J.M. Rosenau, T. Liebner, F. Carbohydr Polym Article Bacterial cellulose (BC) aerogels, which are fragile, ultra-lightweight, open-porous and transversally isotropic materials, have been reinforced with the biocompatible polymers polylactic acid (PLA), polycaprolactone (PCL), cellulose acetate (CA), and poly(methyl methacrylate) (PMMA), respectively, at varying BC/polymer ratios. Supercritical carbon dioxide anti-solvent precipitation and simultaneous extraction of the anti-solvent using scCO(2) have been used as core techniques for incorporating the secondary polymer into the BC matrix and to convert the formed composite organogels into aerogels. Uniaxial compression tests revealed a considerable enhancement of the mechanical properties as compared to BC aerogels. Nitrogen sorption experiments at 77 K and scanning electron micrographs confirmed the preservation (or even enhancement) of the surface-area-to-volume ratio for most of the samples. The formation of an open-porous, interpenetrating network of the second polymer has been demonstrated by treatment of BC/PMMA hybrid aerogels with EMIM acetate, which exclusively extracted cellulose, leaving behind self-supporting organogels. Elsevier Applied Science Publishers 2014-10-13 /pmc/articles/PMC4118683/ /pubmed/25037381 http://dx.doi.org/10.1016/j.carbpol.2014.04.029 Text en © 2014 The Authors http://creativecommons.org/licenses/by/3.0/ This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/). |
spellingShingle | Article Pircher, N. Veigel, S. Aigner, N. Nedelec, J.M. Rosenau, T. Liebner, F. Reinforcement of bacterial cellulose aerogels with biocompatible polymers |
title | Reinforcement of bacterial cellulose aerogels with biocompatible polymers |
title_full | Reinforcement of bacterial cellulose aerogels with biocompatible polymers |
title_fullStr | Reinforcement of bacterial cellulose aerogels with biocompatible polymers |
title_full_unstemmed | Reinforcement of bacterial cellulose aerogels with biocompatible polymers |
title_short | Reinforcement of bacterial cellulose aerogels with biocompatible polymers |
title_sort | reinforcement of bacterial cellulose aerogels with biocompatible polymers |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4118683/ https://www.ncbi.nlm.nih.gov/pubmed/25037381 http://dx.doi.org/10.1016/j.carbpol.2014.04.029 |
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