Synthesis and evaluation of the incorporation of sisal fiber cellulose in the polymeric matrix of starch from jackfruit seed (Artocarpus heterophyllus Lam.) using thermogravimetry

Biopolymeric films were obtained using starch extracted from jackfruit seeds with the addition of cellulose from sisal fiber (reinforcing agent) and glycerol (plasticizing agent). The objective was to obtain materials with noble properties for application in the field of biodegradable packaging, thus highlighting its importance at a sustainable level. The biopolymeric films were formulated using the casting method, mixing cellulose extracted from sisal fiber with proportions (m/m) varying between 2 and 10%. The biopolymeric films were evaluated for thickness, water solubility, water solubility and water vapor permeability (PVA). Also, they characterized by mechanical tests, FTIR-ATR and TG/DTG. The results showed that the biopolymeric films were 0.5% more soluble in acidic media than in water with increasing cellulose concentration. The water vapor permeability of the samples was inversely proportional to the percentage of cellulose incorporation. Tensile tests showed that the maximum stress and strain at break increased with increasing cellulose concentration. The incorporation of cellulose in the biopolymeric films was confirmed by FTIR, it was possible to observe a decrease in the intensity of the absorption band in the region between 3500 and 3100 cm(-1) in relation to the film without cellulose. Furthermore, by TG/DTG, an increase in the thermal stability of biopolymeric films with cellulose was observed. It is suggested that such biopolymeric films are promising and have potential application in the preparation of films for packaging. In addition to replacing petroleum-based polymeric films, they have the advantage of being biodegradable.

Automated summary

This study focuses on the preparation of biopolymeric films using starch from jackfruit seeds, cellulose from sisal fiber, and glycerol. The films show potential for application in biodegradable packaging due to their noble properties. The addition of cellulose increases the solubility of the films in acidic media and decreases their water vapor permeability. Tensile tests indicate that the incorporation of cellulose enhances the maximum stress and strain at break of the films. FTIR and TG/DTG analysis confirm the presence of cellulose in the films and its effect on thermal stability.