Development and characterization of extruded biodegradable foams based on zein and pearl millet flour
Paper in proceedings, 2011

The aim was to establish a preliminary processing window for extrusion foaming of blends of zein and pearl millet flour and to estimate the properties of the extrudates. The weight ratios of zein:pearl millet flour were 75:25, 72:28 or 70:30 and foamed extrudates with a circular geometry were produced with bulk densities between about 350 and slightly higher than 500 kg/m 3 . Compounds with a higher zein content tended to give a more foamed structure. The stiffness (modulus) in compression of the foams was in the range 25-50 MPa with higher values at a higher bulk density. At a given density, the specimens with a higher zein content appeared to give a stiffer structure.

foaming

Processing

biopolymers

Author

Kalep Filli

Mia Sjöqvist

Chalmers, Materials and Manufacturing Technology, Polymeric Materials and Composites

Camilla Öhgren

Mats Stading

Chalmers, Materials and Manufacturing Technology, Polymeric Materials and Composites

Mikael Rigdahl

Chalmers, Materials and Manufacturing Technology, Polymeric Materials and Composites

Annual Transactions the Nordic Rheology Society

Vol. 19 139-145

Driving Forces

Sustainable development

Subject Categories

Materials Engineering

Areas of Advance

Materials Science

More information

Created

10/7/2017