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Wyszukujesz frazę "High Density Polyethylene" wg kryterium: Wszystkie pola


Wyświetlanie 1-2 z 2
Tytuł:
Effect of chemical treatments on the properties of oil palm petiole fiber composites
Autorzy:
Nneka, Ejikeugwu L.
Wadzani, Gadzama S.
Chistian, Asadu O.
Chiamaka, Otisi B.
Powiązania:
https://bibliotekanauki.pl/articles/1193486.pdf
Data publikacji:
2021
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
High density polyethylene
Oil palm petiole fiber (OPPF)
acetic anhydride
chemical composition
potassium chlorate
sodium hydroxide
tensile strength
zinc chloride
Opis:
The effect of chemical treatments with acetic anhydride, potassium chlorate, sodium hydroxide and zinc chloride on the properties of Oil Palm Petiole Fiber composites was studied. The untreated and chemically treated Oil Palm Petiole Fiber (OPPF) was used in fabricating natural fiber/HDPE composites using injection molding machine. The chemical treatments on OPPF enhanced its chemical compositions and morphology. It was observed that the cellulose content at the peak for different treatment are 58.4%, 56.7%, 55.2% and 51.5% at 4wt% concentration for NaOH, KClO3, C4H6O3 and ZnCl respectively. The composites produced with chemically treated fibers performed better than the untreated one. The highest tensile strength of 44.2 Mpa, 39.1 Mpa, 35.6 Mpa, 31.2 Mpa and 25.5 Mpa was obtained at fiber content of 29 wt% for OPPF treated with NaOH, KClO3, C4H6O3, ZnCl and untreated OPPF respectively. Water absorbed by the untreated fiber was high compared to the chemically treated fiber. The chemical treatment created a better interfacial bonding and could be responsible for the improved mechanical properties.
Źródło:
World Scientific News; 2021, 158; 247-266
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Production of Spindle Palm Petiole Fiber Reinforced High Density Polyethyele Composites
Autorzy:
Nneka, Ejikeugwu L.
Monday, Omotioma
Nnaemeka, Omeje B.
Uzoma, Eke R.
Powiązania:
https://bibliotekanauki.pl/articles/1839868.pdf
Data publikacji:
2021
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Spindle palm petiole fiber
Sodium hydroxide
cellulose
chemical composition
Central Composite Design
Response Surface Methodology
tensile strength
polyethylene
Opis:
The work is on the production of spindle palm petiole fiber reinforced high density polyethylene (HDPE) composites. The Spindle Palm Petiole Fiber (SPPF) and HDPE composites were produced using injection molding machine. SPPF were characterized to determine their chemical compositions. Central Composite Design (CCD) was applied as an optimization tool of RSM for cellulose and tensile strength. The chemical composition of the SPPF is cellulose (65%), hemicelluloses (17.1%) and lignin (14.1%). Surface modifications of the fiber enhanced the properties of the fiber. Quadratic model adequately described the relationship between percentage cellulose yield and variables: chemical concentration, mass/volume ratio and time. The cellulose content at optimal level is 60.3% at 3.5wt% concentration, 4g/l mass/volume ratio and time of 16hr. Also for the composite, the quadratic model described the relationship between tensile strength and temperature, fiber/polymer ratio and time. The optimum tensile strength of 42.0 Mpa was obtained at fiber/polymer ratio of 29wt%, temperature of 172 °C and time of 10 min. Water absorbed by the untreated fiber was high compared to the chemically treated fiber. The chemical treatment created a better interfacial bonding of SPPF/HDPE and this could be responsible for the observations.
Źródło:
World News of Natural Sciences; 2021, 38; 98-119
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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