Cover Page March-2019-Advanced Materials Letters

Advanced Materials Letters

Volume 10, Issue 3, Pages 170-177, March 2019
About Cover

The cover photo describes the scheme of the twin screw extruder for the preparation of thermoplastic starch (TPS).  As discussed by M. Paula Guarás, this screw extrusion process is very advantageous for the preparation of TPS films with improved mechanical and water vapor absorption properties in any industrial processing line for plastic packaging products. 

Morphological, structural, thermal and degradation properties of polylactic acid-waxy maize starch nanocrystals based nanocomposites prepared by melt processing

Pooja Takkalkar, Mahalaxmi Ganapathi, Maha Al-Ali, Nhol Kao*, Gregory Griffin​

Chemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne, 3000, Australia

Adv. Mater. Lett., 2019, 10 (3), pp 170-177

DOI: 10.5185/amlett.2019.2185

Publication Date (Web): Dec 31, 2018



Currently used petroleum-based polymers have adversely affected the environment in various ways, mainly due to their non-biodegradability. This undesirable aspect of commercial polymers led to increased interest in the research area of biodegradable polymer nanocomposites. Polylactic acid (PLA) based nanocomposites, with three different loadings of waxy maize starch nanocrystals (WSNC) as nanofiller (1, 3 and 5 wt%), were melt-blended in a Haake Rheomix. The morphological, structural, thermal and abiotic degradation characteristics of the prepared PLA-WSNC nanocomposites were studied to determine the effects of adding WSNC at different loadings in PLA. The results indicated that WSNC were dispersed uniformly at lower loadings (0-3 wt%) and agglomerated at higher loadings (5 wt%) within the PLA matrix. All PLA-WSNC nanocomposites were found to be stable over the processing temperature range of 25-220 ºC. In addition, there was no considerable change in the glass transition temperature and the melting point of the nanocomposites. Though, the cold crystallization temperature was reduced with the increase of WSNC loadings. The abiotic degradation studies, used as an initial screening tool, indicated that WSNC can accelerate the degradation process of PLA.  As a result, the degradation rate was improved for all the PLA-WSNC nanocomposites. The PLA-WSNC-3 wt% was found to be the optimum concentration to enhance the crystallinity and morphological property of PLA, and beyond that the properties were affected by agglomeration. 


Polylactic acid, waxy maize starch nanocrystals, melt processing.

Previous issues

Current Global Scenario of Electric Vehicles

Review on Detection of Phenol in Water 

Investigating the Machinability of Metallic Matrix Composites Reinforced by Carbon Nanotubes: A Review

Photocatalytic ZnO based PES Membranes for AOP Water Treatments under UV and Sunlight

Plasma Activated Water as a Source of Nitrogen for Algae Growth

Digital Light Processing (DLP) 3D Printing of Polyethylene Glycol (PEG) Biopolymer, Commercially available Ultra-High and Tough (UHT) Resin and Maghemite (γ-Fe2O3) Nanoparticles Mixture for Tissue Engineering Scaffold Application

Fabrication of Nanoparticle Embedded Polymeric Microbeads as an Efficient Drug Delivery System

Micro/Nanostructured Papers from Bagasse Pulp Reinforced by Nanofibrillated Cellulose from different Agro-Waste Sources

Structural, Optical and Magnetic Properties of Pristine, (Mn, Al) co-doped ZnO Nanocrystallites Synthesized via co-Precipitation Method

Nanosecond Laser Surface Patterning of Ti6Al4V Bio-alloy for Improved Biological Performance

Synthesis of Cu2O/Ag Composite Nanocubes with Promising Photoluminescence and Photodegradation Activity over Methylene Blue Dye

Locally available Clays of Bangladesh as a Replacement of imported Clays for Ceramic Industries 

Green Synthesis and Characterization of Silver Nanoparticles using Cassia auriculata Leaves Extract and Its Efficacy as A Potential Antibacterial and Cytotoxic Effect

Upcoming Congress

Knowledge Experience at Sea TM