Abstract
In this paper, polymer composites based on polylactide (PLA) and epoxy resin (Epidian 5) were studied in terms of the influence of magnetic induction on their changes in physicochemical properties. The composites contained admixtures in the form of magnetite (Fe3O4) and crystalline cellulose (Avicel PH-1010) in the amount of 10%, 20%, and 30% by weight and starch in the amount of 10%. The admixtures of cellulose and starch were intended to result in the composites becoming biodegradable biopolymers to some extent. Changes in physical and chemical properties due to the impact of a constant magnetic field with a magnetic induction value B = 0.5 T were observed. The changes were observed during tests of tensile strength, bending, impact strength, water absorbency, frost resistance, chemical resistance to acids and bases, as well as through SEM microscopy and with studies of the composition of the composites that use the EDS method and of their structure with the XRD method. Based on the obtained results, it was found that the magnetic induction value changes the properties of composites. This therefore acts as one method of receiving new alternative materials, the degradation of which in the environment would take far less time.
Highlights
Accepted: 1 July 2021The increasing demand for plastic products has contributed to a sharp increase in the amount of landfilled polymer waste
Preparation of Test Samples and Testing Procedure. They were prepared according to the following procedure: a. develop the composition of the samples and the procedures for their preparation, b. weigh the individual components of polymer composites, c. add the individual components in the correct order (e.g., Epidian 5, magnetite and the catalyst) and their mechanical mixing at a speed of 300 revolutions per minute for a period of 180 s, d. place liquid polymer composites in previously prepared molds according to the PN-EN ISO 10210:2018-1 standard, e. place some of the samples between electromagnet poles at set magnetic induction of B = 0.5 T, for the polymerization period, f. leave the other part of the samples with an analogous composition for polymerization outside the electromagnet
Based on the literature and previous self-conducted studies describing the effects of a constant magnetic field on various test objects, changes in mechanical properties as well as physical and chemical properties of polymer composites obtained in the magnetic field environment were expected
Summary
Accepted: 1 July 2021The increasing demand for plastic products has contributed to a sharp increase in the amount of landfilled polymer waste. “Green chemistry” refers to a sustainable environment using biocompatibility, biodegradability, as well as economical and simple materials based on a variety of biopolymer matrices, e.g., chitosan, starch, cellulose, gelatin, alginate, polyhydroxyalkanoate, carrageen, etc. They are widely used in the following areas: organic food, packaging, special biomedical dressings, and water treatment technologies [4]. It was proven that the properties of polymers and composites can be influenced by the use of a constant magnetic field during their production, especially when using magnetic admixtures Examples of such materials are Published: 7 July 2021
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