A Biodegradable Composite of Poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) with Short Cellulose Fiber for Packaging

Abstract

The problem of improper disposal of polymeric waste is increasingly in present. Thus, the use of biodegradable polymers is a good alternative, especially for packaging. Compostable and biodegradable polymers such as PHBV can be completely degraded, making them ideal. But the short processability window and fluid instability is an important drawback to the wider application of this polymer in pure form. Production of composite materials has been indicated as a possibility for using this polymer. One source of filler is cellulose, because besides being widely available from agroindustrial waste. In this context, the present work reports the formulation of rigid packaging with PHBV and cellulose waste. An analytical mill was used to promote the dispersion of cellulose fibers. In general, the cellulose fibers increased the Vicat softening point of the polymeric matrix. There were more crystalline structures, according to DSC, and a decrease in impact strength, probably due to increased crystallinity and agglomerate formation. The microscopic analysis indicated greater surface roughness of the composite due to the increase of fibers, resulting in increased contact angle.