Cargando…

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,...

Descripción completa

Detalles Bibliográficos
Autores principales: Pircher, N., Veigel, S., Aigner, N., Nedelec, J.M., Rosenau, T., Liebner, F.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier Applied Science Publishers 2014
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
_version_ 1782328878529773568
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
work_keys_str_mv AT pirchern reinforcementofbacterialcelluloseaerogelswithbiocompatiblepolymers
AT veigels reinforcementofbacterialcelluloseaerogelswithbiocompatiblepolymers
AT aignern reinforcementofbacterialcelluloseaerogelswithbiocompatiblepolymers
AT nedelecjm reinforcementofbacterialcelluloseaerogelswithbiocompatiblepolymers
AT rosenaut reinforcementofbacterialcelluloseaerogelswithbiocompatiblepolymers
AT liebnerf reinforcementofbacterialcelluloseaerogelswithbiocompatiblepolymers