Properties of polylactide, obtained from lactic acid in the process of lactic fermentation of lactose in whey post production (waste)
Journal Title: Journal of Achievements in Materials and Manufacturing Engineering - Year 2018, Vol 2, Issue 90
Abstract
Purpose: This publication provides a description of RDC Glokor’s own research into the effectiveness of the lactic fermentation process of lactose, lactic acid concentration and polylactide (PLA) production by ring-opening polymerization obtained from the condensation of two molecules of lactic acid. Furthermore, this publication sets out to determine potential applications of the PLA as a commercial material with a selection of thermal properties. Design/methodology/approach: In the described research works, a lactic fermentation process was used in which lactose is converted to lactic acid with the participation of Lactic Acid Bacteria. Polylactide was obtained indirectly by Ring Opening Polymerization and by direct polymerization, straight from lactic acid, omitting the intermediate stages. Next, the obtained lactide and polylactide were examined by spectroscopic methods (IR, NMR) to determine their purity. Thermal methods (TG, DSC) to determine thermoplastic properties, i.e. softening point, decomposition temperature and glass transition temperature. Findings: Obtained from waste whey, PLA and its copolymers are excellent biodegradable polymers that have the potential to be used in medicine as resorbable surgical strands, biopolymers for implant production, as well as in many industries including for the production of biodegradable bottles and disposable packaging, 3D printer cartridges. Research limitations/implications: The research on lactic acid and lactide polymerization described in this article is still a new issue that requires further research to optimize PLA processes with industry-specific thermoplastic and physicochemical properties. Originality/value: In the basic waste processing of milk, there is a large volume of whey sour, which is ecologically dangerous for waste treating. Due to the high content of lactose (up to 6%) this waste can be used as a raw material in the lactic fermentation process in which lactose is converted to lactic acid with the participation of lactic acid bacteria. Lactic acid can be concentrated and subjected to a dehydration process to lactide, which in the final stage is subjected to the process of ring-opening polymerization in order to produce biodegradable polylactide. The described process of carrying out the lactose contained in PLA whey is an innovative way to obtain a biodegradable usable polymer, which can be used to replace plastics such as polypropylene and polyethylene.<br/><br/>
Authors and Affiliations
S. Maślanka, J. Juszczyński, T. Kraszewski, W. Oleksy
Keywords
Related Articles
- EP ID EP431925
- DOI 10.5604/01.3001.0012.8384
- Views 106
- Downloads 0
Effect of graphene as anti-settling agent for magnetorheological fluid
Purpose: Magnetorheological fluids are field-responsive fluids containing magneticparticles suspended in a suitable medium. In this proposed work, the iron powder wasdispersed in silicone oil to obtain magnetorheological...
Mechanical properties and microstructure studies in Friction Stir Welding (FSW) joints of dissimilar alloy – a review
Purpose: Friction stir welding (FSW) is a relatively new solid state joining process thatuses a non-consumable tool to join two different material without melting the workpiecematerial. Friction stir welding (FSW) was de...
Individual implants of a loss of palate fragments fabricated using SLM equipment
Purpose: The aim of the article is to present the new conception of design and manufacturingindividual implants of a loss of palate fragments using Selective Laser Melting equipment.Design/methodology/approach: The desig...
Advances in winch system for defence applications
Purpose: Winch systems are commonly used in many applications starting from fishingindustries to highly advanced defence, space and nuclear sectors. This paper discussesadvances in development of winch system for defence...
A review on multiple responses process parameters optimization of turning Al-TiC[sub]p[/sub] metal matrix composites
Purpose: In this paper the Metal Matrix Composites of AL 7068 and TiC with differentproportions of (2%, 4%, 6%, 8%, and 10%) by using stir casting process, mechanicalproperties and machining responses are investigating.D...