Investigation of processing parameters on production of hemicellulose based films from different agricultural residues via extrusion

Akınalan, Büşra
Today, due to the environmental concerns about petroleum based polymers, the use of renewable polymers including polysaccharides in food packaging applications is increasing rapidly. In the present study, hemicellulose was extracted from corn cobs, wheat straw and sunflower stalks, and two different techniques, solvent casting and extrusion, were utilized for biodegradable film production. Films produced from different types of biomasses were compared in terms of their mechanical, thermal and morphological properties while studying the process parameters of extraction temperature, extrusion temperature and screw speed. Film formation was achieved by extrusion from all the hemicelluloses. Increasing the extrusion temperature had a slightly positive effect on the mechanical properties of films, whereas screw speed did not have a noticeable effect. Hemicellulose extraction at room temperature is determined a better temperature than 60°C in terms of mechanical properties of films. Among the films produced via extrusion, corn cob hemicellulose extracted at room temperature showed the best mechanical properties depending on Ara/Xyl ratio of hemicelluloses, with a toughness of 13MJ/m3 ,while the toughness value of the sunflower stalk based films were relatively poor, which was 2MJ/m3 . On the other hand, homogenous and strong films with a tensile strength of 107 MPa were obtained from the same sunflower stalk hemicellulose when solvent casting technique was used. The onsets of thermal degradation temperature for solvent casted and extruded films were determined via TGA as 300°C for corn cob and wheat straw hemicellulose and 296°C for the films produced from sunflower stalk hemicellulose. The films were mostly homogenous and crack-free except for the sunflower stalk films extruded at 75°C as observed via SEM analysis.


Preparation of antimicrobial films from agricultural biomass
Seber, Ayşe Gizem; Bakır, Ufuk; Department of Biotechnology (2010)
Mainly used food packaging materials are petro-chemical based polymers which present environmental problems since they are not biodegradable and ecologically sustainable. In this study, biodegradable biofilms are produced from xylan, extracted from cotton stalk which is an agricultural biowaste without nutritional value. Antimicrobial property was given to the biofilms with either titanium dioxide sol-gel coatings or titanium dioxide powder addition into the biofilm forming solutions. The antimicrobial acti...
Investigation of the effects of equal channel angular extrusion on light weight alloys
Karpuz, Pınar; Gür, Cemil Hakan; Karaman, İbrahim; Department of Metallurgical and Materials Engineering (2012)
Severe plastic deformation methods are of great interest in industrial forming applications, as they give rise to significant refinement in microstructures and improvements in mechanical and physical properties. In the “Equal Channel Angular Extrusion (ECAE)”, which is the most common method for production of ultrafine grained bulk samples, very high plastic strains are introduced into the bulk material without any change in cross section. This study is composed of two main parts. Part I focuses on the plas...
Investigation Of Influencing Factors For Biological Hydrogen Production By R. Capsulatus In Tubular Photo-Bioreactors
Boran, E.; Ozgur, E.; Gebicki, J.; van der Burg, J.; YÜCEL, MUSTAFA; Gündüz, Ufuk; Modigel, M.; Eroglu, I. (2009-05-13)
Biological hydrogen production processes are considered as an environmentally friendly way to produce hydrogen. They offer the chance to produce hydrogen from renewable energy sources, like sunlight and biomass. This study aims the process development for a photo-fermentative hydrogen production by photosynthetic purple-non-sulfur bacteria, Rhodobacter capsulatus, in a large scale (80L) tubular photo-bioreactor, in outdoor conditions, using acetate as carbon source. It was shown that Rhodobacter capsulatus ...
Investigation of surface properties of quince seed extract as a novel polymeric surfactant
Kirtil, Emrah; Svitova, Tatyana; Radke, Clayton J.; Öztop, Halil Mecit; Şahin, Serpil (2022-02-01)
© 2021 Elsevier LtdIn recent years, there is a growing trend from both academia and the industry towards the use of “clean-labeled” ingredients obtained from renewable resources. Proteins and polysaccharides, in particular, are becoming increasingly popular as alternatives to already well-established synthetic surfactants. Quince seeds are a relatively novel hydrocolloid source that has recently raised interest among researchers due to their strong surface activity and viscosity-enhancing properties. This s...
Evaluation of the Properties of Corn Cob Hemicellulose Based Biodegradable Films Obtained by Extrusion and Solvent Casting Methods
Akınalan Balık, Büşra; Özkan, Necati; Bölükbaşı, Ufuk (2019-05-28)
The remarkable consumption and environmental concerns related to the utilization of fossil based resources have led researchers to focus on renewable raw materials. Lignocellulosic biomass, the fibrous part of plants with a complex matrix comprising different polysaccharides, mainly cellulose, hemicellulose and lignin, is the most abundant, inexpensive, non-starch renewable source in the world. In the present study, hemicellulose, which was obtained from corn cobs by alkali extraction method (...
Citation Formats
B. Akınalan, “Investigation of processing parameters on production of hemicellulose based films from different agricultural residues via extrusion,” M.S. - Master of Science, Middle East Technical University, 2014.