Properties of Biocomposites Produced with Thermoplastic Starch and Digestate: Physicochemical and Mechanical Characteristics

This paper presents the results of a study on the influence of the addition of digestate (DG) sludge from an agricultural biogas plant on the mechanical properties of the coating obtained from thermoplastic starch (TPS). The dried, fragmented digestate, some of which had previously undergone ultraso...

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Bibliographic Details
Published in:Materials 2021-10, Vol.14 (20), p.6092
Main Authors: Ekielski, Adam, Żelaziński, Tomasz, Mishra, Pawan Kumar, Skudlarski, Jacek
Format: Article
Language:English
Subjects:
Biodegradable materials
Biogas
Biomedical materials
Bioplastics
Cellulose
Composite materials
Contact angle
Decomposition
Lignin
Lignocellulose
Manufacturers
Mechanical properties
Modulus of elasticity
Moisture content
Parameters
Polyesters
Polytetrafluoroethylene
Sludge
Tensile strength
Trends
Ultrasonic imaging
Ultrasonic processing
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Summary:This paper presents the results of a study on the influence of the addition of digestate (DG) sludge from an agricultural biogas plant on the mechanical properties of the coating obtained from thermoplastic starch (TPS). The dried, fragmented digestate, some of which had previously undergone ultrasound treatment, is used in the study. Biocomposites are produced by the pouring method using Teflon moulds as matrices. The physicomechanical study included the determination of the basic parameters of the materials obtained. Strength parameters, the contact angle, thermogravimetric properties (TGA), colour and colour difference and moisture absorption are determined. Photographs of the surface of the samples are taken with a scanning electron microscope (SEM) as well. It is found that the addition of the digestate has an advantageous effect on improving the physical and mechanical parameters. In general, samples with digestate also have a higher strength compared to the pure TPS material. The highest tensile strength and Young's modulus are found in samples with the 14 wt% addition of ultrasound-treated digestate. On the basis of this study, it can be concluded that the addition of digestate is a promising approach for the production of TPS biocomposites with superior mechanical properties.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma14206092