Modification of Bacterial Cellulose Biofilms with Xylan Polyelectrolytes

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Santos, Sara and Carbajo, José and Gómez, Nuria and Ladero Galán, Miguel and Villar, Juan (2017) Modification of Bacterial Cellulose Biofilms with Xylan Polyelectrolytes. Bioengineering, 4 (4). p. 93. ISSN 2306-5354

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Official URL: https://doi.org/10.3390/bioengineering4040093




Abstract

The effect of the addition of two [4-butyltrimethylammonium]-xylan chloride polyelectrolytes (BTMAXs) on bacterial cellulose (BC) was evaluated. The first strategy was to add the polyelectrolytes to the culture medium together with a cell suspension of the bacterium. After one week of cultivation, the films were collected and purified. The second approach consisted of obtaining a purified and homogenized BC, to which the polyelectrolytes were added subsequently. The films were characterized in terms of tear and burst indexes, optical properties, surface free energy, static contact angle, Gurley porosity, SEM, X-ray diffraction and AFM. Although there are small differences in mechanical and optical properties between the nanocomposites and control films, the films obtained by BC synthesis in the presence of BTMAXs were remarkably less opaque, rougher, and had a much lower specular gloss. The surface free energy depends on the BTMAXs addition method. The crystallinity of the composites is lower than that of the control material, with a higher reduction of this parameter in the composites obtained by adding the BTMAXs to the culture medium. In view of these results, it can be concluded that BC–BTMAX composites are a promising new material, for example, for paper restoration.


Item Type:Article
Uncontrolled Keywords:bacterial cellulose; xylan polyelectrolytes; nanocomposites
Subjects:Sciences > Chemistry > Biochemistry
Sciences > Chemistry > Materials
ID Code:66137
Deposited On:17 Jun 2021 13:52
Last Modified:18 Jun 2021 07:17

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