Analytical chemistry
Kirsh Irina Anatolyevna; Frolova Yulia Vladimirovna; Beznaeva Olga Vladimirovna; Bannikova Olga Anatolyevna; Gubanova Marina Ivanovna; Kondratova Tamara Alexandrovna
Abstract
Ensuring the microbiological safety of food products is a problem currently at issue. The use of antimicrobial packaging materials is a way of solving the problem. Accordingly, the aim of this work was to create packaging materials based on polyethylene (PE) and silver nanoparticles (Ag-NPs) using the ...
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Ensuring the microbiological safety of food products is a problem currently at issue. The use of antimicrobial packaging materials is a way of solving the problem. Accordingly, the aim of this work was to create packaging materials based on polyethylene (PE) and silver nanoparticles (Ag-NPs) using the ultrasonic treatment of the melt to obtain antimicrobial materials that provide an extended shelf life of packaged food products. Materials based on PE were obtained with Ag-NPs concentrations of 0.5%, 1.0%, 2.0% and 5.0% with and without ultrasonic treatment of melts. Standard methods for studying rheological, physicomechanical, antimicrobial properties and sanitary-chemical indicators of materials were used in the article. It was found that ultrasonic treatment increases the melt flow and contributes to the production of materials with the uniform distribution of additives. The Ag-NPs content from 1.0% and higher in the contents of the material provides antimicrobial properties. The prolongation of the shelf life of the food product, stored in a material based on PE and Ag-NPs 2.0%, was established. In the study of oxygen and water vapour permeability of polymer compositions based on PE and Ag-NPs, it was found that the introduction of a filler increased vapour permeability by about 8-10%, compared with the control samples. The development of polymer composite materials (PCM) with antimicrobial properties and degradability was carried out.
Analytical chemistry
Kirsh Irina Anatolyevna; Beznaeva Olga Vladimirovna; Bannikova Olga Anatolyevnaa; Gubanova Marina Ivanovna; Tveritnikova Isabella Sergeevna; Romanova Valentina Alexandrovna; Novikov Maxim Nikolaevich
Abstract
Nowadays, environmental protection has become a global issue due to the sharp increase of waste as a result of the rapid and almost uncontrollable growth in the consumption of synthetic plastics in many sectors of the economy. The issue of the disposal of the products is therefore becoming increasingly ...
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Nowadays, environmental protection has become a global issue due to the sharp increase of waste as a result of the rapid and almost uncontrollable growth in the consumption of synthetic plastics in many sectors of the economy. The issue of the disposal of the products is therefore becoming increasingly important. The creation of biodegradable materials is one of the most acceptable ways to solve the issue, along with the development and research of new biodegradable polymer materials. This study approached the physicochemical properties and the decomposition time of biodegradable polymer compositions obtained by the impact of the ultrasonic treatment on their melts under the laboratory and experimental industrial conditions. The results indicated that The ultrasonic treatment of polymer composite materials (PCMs), based on starch and polyethylene, could lead to the increase in their physicomechanical properties by 1.5-2 times, compared with the control samples, which is associated with the uniform distribution of the filler in the polymer matrix.
Irina Krish; Olga V Beznaeva; Olga A Bannikova; Dmitry M Myalenko; Valentina A Romanova
Abstract
In the current study, development of the polymer packaging modification technology with natural antimicrobial and antioxidant components were carried out. The aim was to add some new properties to the packaging in order to prolong the shelf life of packaged food products. The birch bark extract with ...
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In the current study, development of the polymer packaging modification technology with natural antimicrobial and antioxidant components were carried out. The aim was to add some new properties to the packaging in order to prolong the shelf life of packaged food products. The birch bark extract with the main active ingredient betulin and dihydroquercetin was used as the natural modifier. The natural starch-based fillers were used to impart the biodegradation effect on the polymeric materials. Definition of the rheological properties of polymers, deformation-strength characteristics of polymer compositions before and after the composting method, sanitary, and chemical properties of polymer materials were evaluated. It should be noted that the laboratory extruder with ultrasonic processing (US) of the polymer composite materials’ melt (PCM) was used to obtain experimental samples. The results have proved the effectiveness of the usage of ultrasonic treatment to obtain PCM based on betulin and starch. A patent application was generated as well.
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