Biosynthesis and Characterization of Nanocellulose-Gelatin Films

Abstract

A nanocellulose-gelatin (bacterial cellulose gelatin (BCG)) film was developed by a supplement of gelatin, at a concentration of 1%–10% w/v, in a coconut-water medium under the static cultivation of Acetobacter xylinum. The two polymers exhibited a certain degree of miscibility. The BCG film displayed dense and uniform homogeneous structures. The Fourier transform infrared spectroscopy (FTIR) results demonstrated interactions between the cellulose and gelatin. Incorporation of gelatin into a cellulose nanofiber network resulted in significantly improved optical transparency and water absorption capacity of the films. A significant drop in the mechanical strengths and a decrease in the porosity of the film were observed when the supplement of gelatin was more than 3% (w/v). The BCG films showed no cytotoxicity against Vero cells.

Preparation of a visual pH-sensing film based on tara gum incorporating cellulose and extracts from grape skins

“…In the TG spectrum, the dominant peaks at 3320 and 2890 cm -1 were assignable to O-H stretching and C-H stretching vibration, respectively [23]. The adsorption peak around 1630 cm -1 corresponded to the stretching vibration of C=O and the peak around 1020 cm -1…”

Nano- and Macroscale Structural and Mechanical Properties of in Situ Synthesized Bacterial Cellulose/PEO-b-PPO-b-PEO Biocomposites

“…12,13 BC can be produced at the large scale using a species of bacteria Gluconacetobacter leading to never drying bacterial cellulose membranes with high water content up to 99 %. 8,12,14 Taking these features into account, it turns out that BC is a potential candidate to be used as a matrix for in-situ fabrication of biocomposites with both water-soluble polymeric materials [13][14][15][16][17][18][19][20][21][22] or inorganic nanoparticles. [23][24][25] The biosynthesis allows to design novel biocomposites with tunable properties by one step pathway and create biocomposites merging the outstanding properties of bacterial cellulose with interesting physic-chemical properties of polymeric materials or optical, electrical, magnetic or antibacterial properties of inorganic nanoparticles.…”

The use of bamboo fibres as reinforcements in composites

“…Over the years, the use of nanocellulose as reinforcing agents in paper and nanocomposites, membranes and fi lms for fi ltration and packaging, stabilizing and texturing agents in cosmetics and food additives, wound dressings, artifi cial blood vessels, scaffolds for tissue engineering and drug delivery systems, among others, has been reported (Ioelovich and Figovsky, 2008 ;Taokaew et al ., 2013 ). However, applications of nanocellulose are still increasing due to its physical and mechanical properties.…”