Biological Treatment Of Spent Coffee Ground (Scg) And Its Influence On The Mechanical Properties Of Biopolymer Composite

This study aimed to develop biomass-reinforced biocomposites by employing spent coffee grounds (SCG) as reinforcement material and poly(lactic acid) (PLA), and poly(hydroxyalkanoate) (PHA) as the matrix. The investigation focused on assessing the effect of SCG content (10–40 wt%) and the PHA/PLA rat...

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Main Author:	Boey, Jet Yin
Format:	Thesis
Language:	English
Published:	2023
Subjects:	T1-995 Technology(General)
Online Access:	http://eprints.usm.my/60315/1/BOEY%20JET%20YIN%20-%20TESIS24.pdf
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id	my-usm-ep.60315
record_format	uketd_dc
spelling	my-usm-ep.603152024-04-01T03:38:08Z Biological Treatment Of Spent Coffee Ground (Scg) And Its Influence On The Mechanical Properties Of Biopolymer Composite 2023-09 Boey, Jet Yin T1-995 Technology(General) This study aimed to develop biomass-reinforced biocomposites by employing spent coffee grounds (SCG) as reinforcement material and poly(lactic acid) (PLA), and poly(hydroxyalkanoate) (PHA) as the matrix. The investigation focused on assessing the effect of SCG content (10–40 wt%) and the PHA/PLA ratio (100/0, 75/25, 50/50, 25/75, and 0/100) on the properties of these biocomposites. The compounding process was conducted using a twin-screw extruder at a temperature of 220˚C at the feeding zone and 210˚C at the mixing zone at a rotating speed of 75 rpm. The mixture was then cooled and pelletized before it was compressed at a temperature of 190˚C using compression moulding for biocomposites making. The biocomposites were then cut according to the different testing dimensions. Incorporating SCG lowered the mechanical properties, primarily due to its incompatibility with the PHA/PLA matrix. This observation was confirmed through morphological analysis, which revealed a gap between the SCG and the matrix. SCG displayed a tendency to aggregate at loading of 40 wt%, leading to increased void formation (8.2–9.1%) compared to lower loading at 10 wt% (7.6–8.1%). A PHA/PLA ratio (50/50) with SCG loading (20 wt%) was chosen to make biocomposites with treated SCG. Biological treatment of SCG using P. chrysosporium CK01 and A. niger DWA8 indicated P. chrysosporium CK01 necessitated a higher moisture content (55%, w/w) for optimum growth and enzyme production, while the optimal condition for enzyme production differed from those promoting A. niger DWA8 growth. 2023-09 Thesis http://eprints.usm.my/60315/ http://eprints.usm.my/60315/1/BOEY%20JET%20YIN%20-%20TESIS24.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Teknologi
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	T1-995 Technology(General)
spellingShingle	T1-995 Technology(General) Boey, Jet Yin Biological Treatment Of Spent Coffee Ground (Scg) And Its Influence On The Mechanical Properties Of Biopolymer Composite
description	This study aimed to develop biomass-reinforced biocomposites by employing spent coffee grounds (SCG) as reinforcement material and poly(lactic acid) (PLA), and poly(hydroxyalkanoate) (PHA) as the matrix. The investigation focused on assessing the effect of SCG content (10–40 wt%) and the PHA/PLA ratio (100/0, 75/25, 50/50, 25/75, and 0/100) on the properties of these biocomposites. The compounding process was conducted using a twin-screw extruder at a temperature of 220˚C at the feeding zone and 210˚C at the mixing zone at a rotating speed of 75 rpm. The mixture was then cooled and pelletized before it was compressed at a temperature of 190˚C using compression moulding for biocomposites making. The biocomposites were then cut according to the different testing dimensions. Incorporating SCG lowered the mechanical properties, primarily due to its incompatibility with the PHA/PLA matrix. This observation was confirmed through morphological analysis, which revealed a gap between the SCG and the matrix. SCG displayed a tendency to aggregate at loading of 40 wt%, leading to increased void formation (8.2–9.1%) compared to lower loading at 10 wt% (7.6–8.1%). A PHA/PLA ratio (50/50) with SCG loading (20 wt%) was chosen to make biocomposites with treated SCG. Biological treatment of SCG using P. chrysosporium CK01 and A. niger DWA8 indicated P. chrysosporium CK01 necessitated a higher moisture content (55%, w/w) for optimum growth and enzyme production, while the optimal condition for enzyme production differed from those promoting A. niger DWA8 growth.
format	Thesis
qualification_level	Master's degree
author	Boey, Jet Yin
author_facet	Boey, Jet Yin
author_sort	Boey, Jet Yin
title	Biological Treatment Of Spent Coffee Ground (Scg) And Its Influence On The Mechanical Properties Of Biopolymer Composite
title_short	Biological Treatment Of Spent Coffee Ground (Scg) And Its Influence On The Mechanical Properties Of Biopolymer Composite
title_full	Biological Treatment Of Spent Coffee Ground (Scg) And Its Influence On The Mechanical Properties Of Biopolymer Composite
title_fullStr	Biological Treatment Of Spent Coffee Ground (Scg) And Its Influence On The Mechanical Properties Of Biopolymer Composite
title_full_unstemmed	Biological Treatment Of Spent Coffee Ground (Scg) And Its Influence On The Mechanical Properties Of Biopolymer Composite
title_sort	biological treatment of spent coffee ground (scg) and its influence on the mechanical properties of biopolymer composite
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Teknologi
publishDate	2023
url	http://eprints.usm.my/60315/1/BOEY%20JET%20YIN%20-%20TESIS24.pdf
_version_	1804888910439907328

Biological Treatment Of Spent Coffee Ground (Scg) And Its Influence On The Mechanical Properties Of Biopolymer Composite

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