Characterizing Biodegradation of PLA and PLA‐g‐AA/Starch Films Using a Phosphate‐Solubilizing Bacillus Species

Abstract

The use of PLA and PLA-g-AA/starch as materials for the controlled release of encapsulated PSB was evaluated. The results showed that the bacterium degraded both the PLA and the PLA-g-AA/starch composite films, resulting in cell release. Severe disruption of the film structure occurred after incubation for 60-90 d. The PLA-g-AA/starch (20 wt.-%) films were more biodegradable than those made of PLA and also suffered a more pronounced decrease in molecular weight and intrinsic viscosity. Although blending of starch appeared to enhance the biodegradability of the PLA films, the pattern of degradation was quite similar for both types of films. The rate of cell release depends on the biodegradability of the film.

Influence of fibre architecture on the biodegradability of FLAX/PLA composites

“…In this context, Petinakis et al (2010) have confirmed the results of Wu (2008) that high amounts of the hydrophilic filler starch can increase the biodegradation rate of PLA. Peterson et al analysed the decaying process of poly(hydroxybutyrate-hydroxyvalerate) (PHBV)/wood fibre composites and identified an optimum fibre weight content of around 15e20 wt-%, which led to the highest degradation rates (Peterson et al, 2002;Peterson, 2006).…”

Modification of Lignin with Silane Coupling Agent to Improve the Interface of Poly(L-lactic) Acid/Lignin Composites

“…PLA is also considered easy to process in industrial plastic applications (Rangari and Vasanthan 2012). However, its high cost, poor toughness, low glass transition temperature (ranging from 55 to 65 °C), and uncontrollable biodegradation rate have severely limited its application (Dorati et al 2007;Wu 2008;Yeh et al 2008). Developing PLA-based composites with low-cost, renewable, natural fillers with enhanced properties and lower price provides an important class of new biodegradable materials.…”

Optimization of photosynthetic bacteria wastewater treatment and study of microbial species diversity

“…PSB can effectively treat high concentrated organic wastewater such as starch processing wastewater [3], soybean wastewater [4], beer wastewater [5], oil wastewater [6], industrial and domestic wastewater [7,8]. COD removal by PSB can reach 60-95%.…”