Electrically conductive biocompatible composite aerogel based on nanofibrillated template of bacterial cellulose/polyaniline/nano-clay

Bacterial cellulose (BC) aerogel owing to its porous and 3D structure, poses a suitable matrix for embedding nanomaterials and polymers. Herein, BC composites comprising nano-clay/polyaniline (PANI) were synthesized via a two-step procedure. Clay nanoplatelets were dispersed in the BC membrane to fo...

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Bibliographic Details
Published in:International journal of biological macromolecules 2021-03, Vol.173, p.467-480
Main Authors: Salehi, Mohammad Hadi, Golbaten-Mofrad, Hooman, Jafari, Seyed Hassan, Goodarzi, Vahabodin, Entezari, Maliheh, Hashemi, Mehrdad, Zamanlui, Soheila
Format: Article
Language:English
Subjects:
Bacterial cellulose
Biocompatibility
Nano-clay
Nanocomposite aerogels
Polyaniline
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Summary:Bacterial cellulose (BC) aerogel owing to its porous and 3D structure, poses a suitable matrix for embedding nanomaterials and polymers. Herein, BC composites comprising nano-clay/polyaniline (PANI) were synthesized via a two-step procedure. Clay nanoplatelets were dispersed in the BC membrane to form a nanofibrillated template for aniline in-situ polymerization leading to formation of a double interconnected network of electrically conductive path within the aerogel. Deposition of PANI particles on BC/clay nanocomposite was confirmed by FTIR, XRD, FESEM, and EDX techniques. The surface electrical conductivity of 0.49 S/cm was obtained for the composite aerogel comprising 5 wt% nano-clay which is 16 folds higher than that of the sample without nano-clay. Thermal stability and storage modulus of the aerogels was improved by inclusion of PANI and nano-clay. Synergistic effect of clay and polyaniline on biocompatibility and cell adhesion was obtained with no mutagenic or carcinogenic effects. The developed electrically conductive composite aerogels can be utilized as suitable scaffolds for tissue engineering applications demanding a good balance of flexibility, dimensional and thermal stability and biocompatibility. [Display omitted] •Developed electrically conductive biocomposite aerogel based on BC/PAni/nano-clay•Obtained 16 folds improvement in the electrical conductivity by nano-clay inclusion•Synergistic effect of clay and PAni on biocompatibility with no mutagenic effects•Enhanced thermal stability via simultaneous incorporation of clay and PAni•Potential applications in tissue engineering demanding balance of properties
ISSN:0141-8130
1879-0003
DOI:10.1016/j.ijbiomac.2021.01.121