Autor: Abioye, A. A. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Innovative Foundry Technology and Material Using Fused Deposition Modeling and Polylactic Acid Material in Sand Casting
Autorzy:: Anakhu, P. I.
Bolu, C. C.
Abioye, A. A.
Onyiagha, G.
Boyo, H.
Jolayemi, K.
Azeta, J.
Powiązania:: https://bibliotekanauki.pl/articles/381692.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: fused deposition modeling
rapid pattern
sand casting pattern
FDM printed
PLA pattern
mold cavity
osadzanie przetopionego materiału
model odlewniczy
gniazdo formujące
Opis:: In sand casting, Fused Deposition Modeling (FDM) printing by using Poly Lactic Acid (PLA) filament is one of the innovative foundry technologies being adopted to substitute traditional pattern making. Several literatures have reported the influence of process parameters such as raster angle and print speed on some mechanical properties of FDM-printed, PLA-prototypes used in other applications. This study investigated the effects of interior fill, top solid layer, and layer height on the compressive strength of rapid patterns for sand casting application. Different values of the process parameters were used to print the pre-defined samples of the PLA-specimens and a compression test was performed on them. The coupled effects of the process parameters on compressive strength were investigated and the optimum values were determined. Interior fill of 36%, layer height of 0.21 mm and top solid layer of 4 were found to produce a FDM-printed, PLA-pattern that sustained a compaction pressure of 0.61 MPa. A simulation analysis with ANSYS^® to compare failure modes of both experiment and model shows a similarity of buckling failure that occurred close to the base of each specimen.
Źródło:: Archives of Foundry Engineering; 2018, 18, 2; 65-71
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Investigation of Biodegradation Speed and Biodegradability of Polyethylene and Manihot Esculenta Starch Blends
Autorzy:: Abioye, Abiodun A.
Obuekwe, Chukwunonso
Fasanmi, Oluwatosin
Oluwadare, Oreofe
Abioye, Oluwabunmi P.
Afolalu, Sunday A.
Akinlabi, Stephen A.
Bolu, Christian A.
Powiązania:: https://bibliotekanauki.pl/articles/123576.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: degradation rate
degradation ratio
biodegradable
polymer
manihot esculenta
Opis:: Over 350 million tons of conventional plastics are currently produced from petroleum per year and this amount is expected to rise exponentially in the near future. Proper disposal of these products has caused a great problem for the waste management industry and as a result, there is a significant negative impact on the environment. As a matter of fact, in order to reduce the environmental impact of plastics, some products obtained from agriculture (like starch) are used as polymer blend with synthetic plastics. This study shows that Manihot esculenta can be blended with polyethylene to form a partially degradable polymer. The processing conditions and sample formulations are shown to significantly affect the structure of the polymer which has a concomitant effect upon the degradation ratio as well as the degradation rate. Six samples were produced by varying composition of the blend between Low-density Polyethylene and Manihot esculenta using glycerol and water as plasticiser. These samples were buried in soil and the degradation ratios and rates were studied within a period of 28 days. The results showed that these produced biopolymers are environmentally compatible and bio-degradable. The rate of biodegradation in soil of these biopolymer samples varied largely. The polymer blend with 80% LDPE (20 CaS) by weight had the most regular weight loss over the period of the study. Under the conditions the study was carried out, polymer blend 20 CaS also had the steadiest rate of degradation. Hence, 80% LDPE (wt.%) blended with Manihot esculenta starch is the optimal ratio with regard to the degradability of biopolymer in sandy-loam soil.
Źródło:: Journal of Ecological Engineering; 2019, 20, 2; 65-72
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Environmental Impact on Biodegradation Speed and Biodegradability of Polyethylene and Zea Mays Starch Blends
Autorzy:: Abioye, Abiodun A.
Oluwadare, Oreofe P.
Abioye, Oluwabunmi P.
Obuekwe, Chukwunonso C.
Afolalu, Adeniran S.
Atanda, Pethuel O.
Fajobi, Muyiwa A.
Powiązania:: https://bibliotekanauki.pl/articles/123808.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: biodegradable
biodegradation rate
biopolymer
loamy sand
Zea mays
Opis:: Several studies projected that by year 2025, 4.3 billion urban residents will be generating about 2.2 billion tonnes of municipal solid waste per year, over 10% of which will be plastics. The landfills in Nigeria are uncontrolled and do not conform to the international standards of similar operations elsewhere in the world; this makes the disposal of synthetic polymers in the soil even more hazardous. Due to the availability and relative inexpensiveness of Zea mays in Nigeria, this study explores the use of this natural polymer, blended with low density polyethylene (LDPE) as an alternative to synthetic plastics. Biodegradability of the biopolymer blend was observed while buried in loamy sand soil with properties similar to the soil found in the general area of the study. The results showed that a polymer blend with 50% LDPE (50 CoS) by weight had the most uniform weight loss over the period of the study. Under the soil conditions given in the study, 50 CoS also had the steadiest rate of degradation. Hence 50% LDPE (wt.%) blended with Zea mays starch is the optimal ratio with regard to the degradability of biopolymer in loamy sand soil Ota, Ogun State, Nigeria.
Źródło:: Journal of Ecological Engineering; 2019, 20, 9; 277-284
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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