Biosynthesized Nanocomposite of Bacterial Nanocellulose—Tacca leontopetaloides Starch for Sustainable UV Resistant Film

Abstract

Polysaccharide nanocomposites have extensive applications and potential to replace non-degradable petroleum products. Nanocellulose and starch isolated from Tacca leontopetaloides are composited by the environmentally friendly means of in situ biosynthesis in a one-step process. Low concentration ranges are selected to provide culture medium with low viscosity (<1 Pa s). Supplementing medium with 0.75% w/v of Tacca starch resulted high yield (5.8 g L−1), crystallinity (89%), and tensile strength (104 MPa). Meanwhile, wettability, water vapor permeability (WVP), and water absorption capacity (WAC) vary depending on the starch content. At the highest tested starch content (1.5% w/v), yield, WVP, and WAC drop to 4 g L−1, 1.7 × 10–9 g m−1 Pa−1 h−1, and 311%, respectively. Due to the suitable fiber arrangement and porosity, UV resistances of the composites are enhanced by Tacca starch. The fabricated nanocomposites are anticipated to use as UV resistant film to protect the oxidative rancidity by UV lights.