Development and characterisation of kenafnanohybrid dental composites
Natural fibres such as kenaf fibres have enormous potential in replacing synthetic fibre used for composite reinforcement. This study aimed to optimize the bonding mechanism between kenaf and nanohybrid dental composite from rice husk and investigate mechanical properties of this composite. Kenaf...
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| Format: | Thesis |
| Language: | English |
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2024
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| Online Access: | http://eprints.usm.my/61760/1/NOORASYIKIN%20BINTI%20AB%20RASID-FINAL%20THESIS%20P-SGM001721%28R%29-E.pdf |
| _version_ | 1824451962521780224 |
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| author | Rasid, Noorasyikin Ab |
| author_facet | Rasid, Noorasyikin Ab |
| author_sort | Rasid, Noorasyikin Ab |
| collection | USM |
| description | Natural fibres such as kenaf fibres have enormous potential in replacing
synthetic fibre used for composite reinforcement. This study aimed to optimize the
bonding mechanism between kenaf and nanohybrid dental composite from rice husk
and investigate mechanical properties of this composite. Kenaf fibres was processed
to obtain cellulose nanocrystals (CNC) and silane treated with hybridization of
tetraethyl orthosilicate (TEOS) sol gel and γ-Methacryloxypropyltrimethoxysilane (γ-
MPS). The treated CNC was investigated through Fourier-transform infrared
spectroscopy (FTIR) and thermogravimetric analysis (TGA). Six specimens from each
group with different ratio of γ-MPS and TEOS were prepared for compressive and
flexural investigation. The experimental composites were compared with commercial
nanohybrid composite and fibre reinforced composite (Ever-X posterior, Filtek Z350
and Neofil). Data was statistically analysed using one-way ANOVA test and the
fracture surfaces of the samples were subjected to scanning electron microscope
(SEM) assessment. FTIR results showed formation of chemical bonds between kenaf
CNC with γ-MPS and TEOS sol gel. TGA showed highest decomposition temperature
in non-silane treated kenaf fibre compared to silane treated kenaf fibre. Mean flexural
and compressive strength between all groups showed statistically significant results
(p=0.000). Experimental composite group with fibre reinforced showing higher
flexural strength by 31 % while compressive strength increases by 38% compared to
non- fibre reinforced composite, however the strength was lower as compared to
commercial composites. The compressive strength of all the experimental composites were significantly lower than that of commercial composites. Silane treatment
showing evidence of modification and improved bonding between the kenaf fibres and
the resin matrix, even though the strength was lower than the commercial composite. |
| first_indexed | 2025-02-19T02:42:58Z |
| format | Thesis |
| id | usm.eprints-61760 |
| institution | Universiti Sains Malaysia |
| language | English |
| last_indexed | 2025-02-19T02:42:58Z |
| publishDate | 2024 |
| record_format | dspace |
| spelling | usm.eprints-617602025-02-13T05:19:01Z http://eprints.usm.my/61760/ Development and characterisation of kenafnanohybrid dental composites Rasid, Noorasyikin Ab R Medicine Natural fibres such as kenaf fibres have enormous potential in replacing synthetic fibre used for composite reinforcement. This study aimed to optimize the bonding mechanism between kenaf and nanohybrid dental composite from rice husk and investigate mechanical properties of this composite. Kenaf fibres was processed to obtain cellulose nanocrystals (CNC) and silane treated with hybridization of tetraethyl orthosilicate (TEOS) sol gel and γ-Methacryloxypropyltrimethoxysilane (γ- MPS). The treated CNC was investigated through Fourier-transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). Six specimens from each group with different ratio of γ-MPS and TEOS were prepared for compressive and flexural investigation. The experimental composites were compared with commercial nanohybrid composite and fibre reinforced composite (Ever-X posterior, Filtek Z350 and Neofil). Data was statistically analysed using one-way ANOVA test and the fracture surfaces of the samples were subjected to scanning electron microscope (SEM) assessment. FTIR results showed formation of chemical bonds between kenaf CNC with γ-MPS and TEOS sol gel. TGA showed highest decomposition temperature in non-silane treated kenaf fibre compared to silane treated kenaf fibre. Mean flexural and compressive strength between all groups showed statistically significant results (p=0.000). Experimental composite group with fibre reinforced showing higher flexural strength by 31 % while compressive strength increases by 38% compared to non- fibre reinforced composite, however the strength was lower as compared to commercial composites. The compressive strength of all the experimental composites were significantly lower than that of commercial composites. Silane treatment showing evidence of modification and improved bonding between the kenaf fibres and the resin matrix, even though the strength was lower than the commercial composite. 2024-02 Thesis NonPeerReviewed application/pdf en http://eprints.usm.my/61760/1/NOORASYIKIN%20BINTI%20AB%20RASID-FINAL%20THESIS%20P-SGM001721%28R%29-E.pdf Rasid, Noorasyikin Ab (2024) Development and characterisation of kenafnanohybrid dental composites. Masters thesis, Universiti Sains Malaysia. |
| spellingShingle | R Medicine Rasid, Noorasyikin Ab Development and characterisation of kenafnanohybrid dental composites |
| title | Development and characterisation of kenafnanohybrid
dental composites |
| title_full | Development and characterisation of kenafnanohybrid
dental composites |
| title_fullStr | Development and characterisation of kenafnanohybrid
dental composites |
| title_full_unstemmed | Development and characterisation of kenafnanohybrid
dental composites |
| title_short | Development and characterisation of kenafnanohybrid
dental composites |
| title_sort | development and characterisation of kenafnanohybrid dental composites |
| topic | R Medicine |
| url | http://eprints.usm.my/61760/1/NOORASYIKIN%20BINTI%20AB%20RASID-FINAL%20THESIS%20P-SGM001721%28R%29-E.pdf |
| work_keys_str_mv | AT rasidnoorasyikinab developmentandcharacterisationofkenafnanohybriddentalcomposites |