Volume: 2, 2023
2nd International PhD Student’s Conference at the University of Life Sciences in Lublin, Poland:
ENVIRONMENT – PLANT – ANIMAL – PRODUCT
Abstract number: T022
DOI: https://doi.org/10.24326/ICDSUPL2.T022
Published online: 19 April 2023
ICDSUPL, 2, T022 (2023)
Characteristic of selected properties of PHB modified by spent coffee grounds
Sylwia Aleksandra Kapyś1*
1 Department of Polymer Processing, Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland
* Corresponding author: sylwia.kapys@pollub.edu.pl
Abstract
Biocomposites are mixed materials, that consist of two phases: matrix and reinforcement in which at least one of the materials is organic. This means that in a biocomposite the matrix or filler can be of organic origin, or both matrix and filler can be of organic origin. Tested polyhydroxybutyrate (PHB) is a natural, nontoxic and biodegradable biopolymer. It means it decomposes to water and carbon dioxide. PHB is produced by different types of bacteria in fermentation process of glucose and is also a food source for bacteria, fungi or algae but degrades only in optimal conditions for microbial growth. PHB has thermoplastic properties so it can be easily molded. Spent coffee grounds are the waste product from brewing coffee. Brewing one coffee produces around 10g spent coffee grounds. Just in Poland 120 000 ton of spent coffee grounds are produced yearly. Mostly spent coffee grounds, instead of used for recycling, are dumped into general waste and lands on landfill. In research selected mechanical properties of PHB biocomposite filled with spent coffee grounds were determined: tensile strength, bending strength, Charpy impact strength and hardness. A comparative analysis of the properties of PHB and PHB biocomposite with different filler percentages was carried out.
How to cite
S.A. Kapyś, 2023. Characteristic of selected properties of PHB modified by spent coffee grounds. In: 2nd International PhD Student’s Conference at the University of Life Sciences in Lublin, Poland: Environment – Plant – Animal – Product. https://doi.org/10.24326/ICDSUPL2.T022