Production of hemicellulose-based biodegradable films from agricultural wastes

Date

2009-09-01

Author

Bahcegul, E.
Özkan, Necati
Bakir, U.

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

221
views

0
downloads

Owing to the increasing environmental awareness and restrictions together with the depletion of fossil-based resources, production of biodegradable films receives increasing attention to substitute at least a part of the largely consumed conventional synthetic plastics. Despite there are a variety of polymers that are used for biodegradable plastic production these alternatives are either more expensive compared to their non-biodegradable petroleum-based counterparts or obtained from sources such as corn or potatoes, which have the primary function of being nutritional substances. Thus production of low cost biodegradable plastics from non-nutritional renewable resources appears to be a major need. In this perspective, hemicellulose-based biodegradable films were produced from an agricultural waste, namely cotton stalk. The hemicellulose, xylan, is obtained from cotton stalks by alkali extraction followed by ethanol precipitation. The xylan obtained this way is a glucuronoxylan (GX). GXs are unable to form continuous films without the use of additives, especially plasticizers. However due to the extraction procedure used, which does not include any lignin removal stage before or after the extraction, continuous films of GX containing lignin were formed upon solvent casting that contained no plasticizers or other additives. This technique thus reduces the cost by removing the typical lignin removal stage making the process more environmental friendly as well. The polymer that was obtained from the extraction was dissolved in water and upon the evaporation of solvent slightly yellow transparent films were obtained with a thickness of approximately 50 μm. The films obtained this way were characterized by means of their mechanical properties. An ultimate tensile strength (UTS) value of 14 MPa with an elongation at break of 12% was obtained for the films. Films were also prepared by the addition of different plasticizers at different concentrations and these were characterized by means of the mechanical and water vapor transmission rate properties.

URI

https://hdl.handle.net/11511/30694

Journal

NEW BIOTECHNOLOGY

DOI

https://doi.org/10.1016/j.nbt.2009.06.627

Collections

Graduate School of Natural and Applied Sciences, Article

Suggestions

OpenMETU
Core

Production of valuable chemicals from plastic wastes containing polyethylene and polypropylene Habib, Abdul Rehman Rajabali; Sezgi, Naime Aslı; Department of Chemical Engineering (2019) Global plastic consumption has significantly increased recently creating a serious environmental threat due to the non-biodegradability of plastics. Disposal methods like landfilling and incineration result in soil pollution and emission of toxic gases, respectively. Thus the catalytic thermal degradation of plastic offers a safer and economical alternative. In this study, aluminium and/or tungstophosphoric acid (TPA) loaded silica aerogel was used in the pyrolysis of polyethylene and polypropylene. The sil...
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 alkaline pretreatment parameters on amulti-product basis for the co-production of glucose and hemicellulose based films from corn cobs Toraman, Hilal Ezgi; Bakır Bölükbaşı, Ufuk; Özkan, Necati; Department of Chemical Engineering (2012) There is an increasing trend in the world for using renewable sources of fuels and chemicals due to the continuous depletion of fossil fuel reserves besides the environmental issues related with the exploitation of these resources. Lignocellulosic biomass is seen as the most promising candidate to be used instead of fossil sources because of its availability, relatively low price and less competition with food and feed crops. In this study, corn cobs, a lignocellulosic agricultural waste, were subjected to ...
Degredable polymers of D-lactate from renewables OSMANAĞAOĞLU, ÖZLEM; Hamamcı, Haluk; Harun, Onlu (2014-07-01) The production of biodegradable plastics is of increasing interest because of environmental concerns. For the same reasons the utilization of renewable materials for the production of such materials is also being supported. Lactic acid polymers are among the biodegradable materials that are being produced and whose production capacity is increasing. Lactic acid has two chiral forms, D (-) and L (+); both of which can be produced by fermentation. These chiral forms, when polymerized may have distinct propert...
Evaluation of Organochlorine Pesticides (OCPs) and Polychlorinated Biphenyls (PCBs) Concentrations in the River and Marine Sediments of Samsun Coastline Dinc, Burak; Avaz, Gulsen; Canli, Oltan; Guzel, Baris; EREN, BEYTULLAH; Yetiş, Ülkü (2021-03-01) Today, the persistent organic pollutant loads which are formed as a result of modern agriculture and industrial production are becoming very dangerous for the environment and human health. Exposure of living things to these pollutants can occur by direct exposure to pollutants emission or by transport of pollutants as a result of food chain and meteorological events. For this reason, all environmental samples should be analyzed in this context and risk assessments should be made especially for regions where...

Citation Formats

E. Bahcegul, N. Özkan, and U. Bakir, “Production of hemicellulose-based biodegradable films from agricultural wastes,” NEW BIOTECHNOLOGY, pp. 0–0, 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30694.