Epoxy/fish scales hydroxyapatite (FsHAp) composites toughened by liquid natural rubber for biomedical applications
The aims of this study were to improve the mechanical properties, thermal stabilityand biocompatibility of epoxy/fish scales hydroxyapatite (FsHAP) compositetoughened with liquid natural rubber. The FsHAp was extracted from Tilapia fishscales using thermal method while liquid natural rubber was prod...
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| Format: | thesis |
| Language: | eng |
| Published: |
2019
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| Subjects: | |
| Online Access: | https://ir.upsi.edu.my/detailsg.php?det=6502 |
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| Summary: | The aims of this study were to improve the mechanical properties, thermal stabilityand biocompatibility of epoxy/fish scales hydroxyapatite (FsHAP) compositetoughened with liquid natural rubber. The FsHAp was extracted from Tilapia fishscales using thermal method while liquid natural rubber was produced frompoly(methyl methacrylate) grated natural rubber (MG30) via oxidative and photodegradation methods label as LMG30A and LMG30B, respectively. The analysis ofliquid natural rubber was carried out using Fourier transform infrared spectroscopy(FTIR), nuclear magnetic resonance spectroscopy (NMR) and gel permeationchromatography (GPC) have shown that no significant chemical structure changebetween both LMG30 (A and B) and MG30. GPC analysis exhibited that the averagemolecular weight of LMG30A (29,307Da) was lower than LMG30B (97,693Da). Thefracture toughness of the epoxy was increased up to 23 fold (15.2 MPa.m1/2) whenepoxy loading with 10 wt% FsHAp and toughened with 6 phr LMG30A, whereasimpact strength and flexural test increased up to twice as compared to neat epoxy. Themorphology was characterized using field emission scanning electron microscope(FESEM) showed uniform dispersion of rubber particles within the epoxy matrix withaverage diameter between 0.7 and 1.2 m. Differential scanning calorimetry (DSC)and thermo gravimetric analysis (TGA) curves have showed the thermal stability ofthe epoxy/FsHAp/LMG30A composite higher as compared to neat epoxy. Theepoxy/FsHAp/LMG30A composite was proven to be biocompatible throughcytotoxicity test. In conclusion, the epoxy/FsHAp/LMG30A composite shown highermechanical properties, thermal stability and biocompatibility as compared to neatepoxy. As an implication, the developed epoxy/FsHAp/LMG30A composite ispotential to be used as medical device applications. |
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