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Wyświetlanie 1-2 z 2
Tytuł:
Effect of flax fibers addition on the mechanical properties and biodegradability of biocomposites based on thermoplastic starch
Autorzy:
Borowski, Gabriel
Klepka, Tomasz
Pawłowska, Małgorzata
Lavagnolo, Maria Cristina
Oniszczuk, Tomasz
Wójtowicz, Agnieszka
Combrzyński, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/204728.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
biocomposite
flax fiber
maize starch
extrusion-cooking
biodegradation
energy recovery
Opis:
The research was intended to develop a biocomposite as an alternative biodegradable material, for the production of, e.g., disposable utensils. The author’s tested thermoplastic maize starch, both without additives and with the addition of crumbled flax fiber in the share of 10, 20 and 30 wt%. The plasticizer added was technical glycerin and the samples were produced by a single-screw extruder. The mechanical strength tests were performed, including the impact tensile test and three-point bending flexural test. Afterwards, the samples were tested for biodegradability under anaerobic conditions. The methane fermentation process was carried in a laboratory bioreactor under thermophilic conditions with constant mixing of the batch. All samples proved to be highly susceptible to biodegradation during the experiment, regardless of the flax fiber share. The biogas potential was about 600 ml·g-1, and the methane concentration in biogas ranged from 66.8 to 69.6%. It was found, that the biocomposites can be almost completely utilized in bioreactors during the biodegradation process. The energy recovery in the decomposition process with the generation of significant amount of methane constitutes an additional benefit.
Źródło:
Archives of Environmental Protection; 2020, 46, 2; 74-82
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Moisture sorption characteristics of extrusion-cooked starch protective loose-fill cushioning foams
Autorzy:
Combrzyński, Maciej
Mościcki, Leszek
Kwaśniewska, Anita
Oniszczuk, Tomasz
Wójtowicz, Agnieszka
Sołowiej, Bartosz
Gładyszewska, Bożena
Muszyński, Siemowit
Powiązania:
https://bibliotekanauki.pl/articles/972794.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
extrusion-cooking
thermoplastic starch
foams
protective loose-fill materials
sorption isotherms
foaming agents
Opis:
The aim of this work was to determine the water vapour sorption properties of thermoplastic starch filling foams processed by extrusion-cooking technique from various combinations of potato starch and two foaming agents: poly(vinyl) alcohol and Plastronfoam, in amount of 1, 2 and 3% each. Foams were processed with the single screw extruder-cooker at two different screw rotational speeds 100 and 130 r.p.m. The sorption isotherms of samples were determined and described using the Guggenheim-Anderson-de Boer model. Also, the kinetics of water vapour adsorption by foams, as a function of time, was measured and fitted with Peleg model. On the basis of the analysis the influence of the applied foaming agents, as well as the technological parameters of extrusion-cooking process in relation to water vapour adsorption by thermoplastic starch foams was demonstrated. There was no difference between the shapes of the isotherms for poly(vinyl) alcohol foams while for Plastronfoam foams a notable difference among foams extruded at 100 r.p.m. was observed in the regions of low and high humidity content. The analysis of the Guggenheim-Anderson-de Boer model parameters showed that the water molecules were less strongly bound with the foam surface when extruded at a lower screw speed.
Źródło:
International Agrophysics; 2017, 31, 4; 457-463
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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