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The rate of repeated capture and release of water by a mixed recyclate of disposable diapers and its individual components
Březinová, Štěpánka ; Ondreáš, František (referee) ; Jančář, Josef (advisor)
This bachelor’s thesis focuses on the recycling of disposable diapers. The waste from disposable diapers could be potentially used again and it is also a more ecological solution than incineration of this waste. The process of recycling separates individual parts of the diaper so they could be used again. In this bachelor’s thesis, the product of recycling is a recycled material that is composed of cellulose and sodium polyacrylate. Sodium polyacrylate is one of the superabsorbent polymers that have great absorptive qualities. The resulting recycled material has the same qualities as well. In the experimental part of this bachelor’s thesis, the recycled material is analyzed and the absorptive and desorptive qualities are compared with the qualities of sodium polyacrylate.
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Biodegradable thermoplastics from renewable resources
Březinová, Štěpánka ; Kučera, František (referee) ; Petruš, Josef (advisor)
The theoretical part of diploma thesis summarizes the state of the art in the field of biodegradable thermoplastic materials, emphasizing polymeric materials made from renewable sources and the possibilities for their processing and for the modification of their useful properties. The experimental part of the thesis is focused on the preparation and characterization of biodegradable polymer blends based on thermoplastic starch (TPS) and poly(butylene adipate-co-terephthalate) (ECX). A suitable type of TPS was selected according to the rheological behavior of the melt for blending with ECX via extrusion technology. The degree of compatibility between TPS and ECX was evaluated by infrared spectroscopy (FTIR-ATR) and by examining the morphology of TPS/ECX blends using scanning electron microscopy (SEM). Affecting the mechanical properties, rheological behavior, and wettability of the prepared TPS/ECX was verified by testing the mechanical properties under tensile stress, determining the melt flow index (MFI), employing the oscillatory rheological test, and determining the maximum wettability. The experimentally obtained results show the possibility of optimizing the mechanical and rheological properties of TPS by blending with ECX. In terms of biodegradability, blends with a majority TPS content can be assumed to be more advantageous.
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The rate of repeated capture and release of water by a mixed recyclate of disposable diapers and its individual components
Březinová, Štěpánka ; Ondreáš, František (referee) ; Jančář, Josef (advisor)
This bachelor’s thesis focuses on the recycling of disposable diapers. The waste from disposable diapers could be potentially used again and it is also a more ecological solution than incineration of this waste. The process of recycling separates individual parts of the diaper so they could be used again. In this bachelor’s thesis, the product of recycling is a recycled material that is composed of cellulose and sodium polyacrylate. Sodium polyacrylate is one of the superabsorbent polymers that have great absorptive qualities. The resulting recycled material has the same qualities as well. In the experimental part of this bachelor’s thesis, the recycled material is analyzed and the absorptive and desorptive qualities are compared with the qualities of sodium polyacrylate.
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