Prof. Dr. Sinin Hamdan
Universiti Malaysia Sarawak, Malaysia
Biography: Prof. Dr. Sinin Hamdan focus on the field of specialization is Mechanics of Materials based on his PhD in that area from Loughborough University of Technology, Loughborough, England (1994). That educational experience with his MSc in Welding and Adhesive Bonding of Engineering Materials from Brunel University, London (1986) and BSc in Physics (1984) from Universiti Kebangsaan Malaysia allow him to retool himself to fit into Universiti Malaysia Sarawak (UNIMAS) priority area of Materials and Manufacturing when he joined this university in 2001. Prof. Dr. Sinin Hamdan attended a 6 months scientist exchange program (post doc) under Japanese Society for Promotion of Science (JSPS/VCC) in 1999 at Wood Physics Laboratory, Kyoto University and obtained a good experience working with wood physics. From 9-31 March 2003, Prof. Dr. Sinin Hamdan went to Wood Research Institute, Kyoto University, Japan (under Japanese Society for Promotion of Sciences-JSPS) to study The Application of Acoustic Emission Monitoring to Forest Product Research. From 7 May-7 Jun 2007, Prof. Dr. Sinin Hamdan work with Collaboration on Dynamics, Materials and Machining GeM Laboratory, Ecole Central Nantes (ECN), Nantes France. From 1 august-31 october 2012, he worked on gamelan in Physics Laboratory, Loughborough University.
Abstract: Jute cellulose composite (JCC), bamboo cellulose composite (BCC), untreated hybrid jute-bamboo fiber composite (UJBC), and jute-bamboo cellulose hybrid biocomposite (JBCC) were fabricated. All cellulose hybrid composites were fabricated with chemical treated jute-bamboo cellulose fiber at 1:1 weight ratio and low-density polyethylene (LDPE).The effect of chemical treatment and fiber loading on the thermal, mechanical, and morphological properties of composites was investigated. Treated jute and bamboo cellulose were characterized by Fourier transform infrared spectroscopy (FTIR) to confirm the effectiveness of treatment. All composites were characterized by tensile testing, thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). Additionally, surface morphology and water absorption test was reported. The FTIR results revealed that jute and bamboo cellulose prepared are identical to commercial cellulose. The tensile strength and Young’s modulus of composites are optimum at 10 weight percentage (wt%) fibers loading. All cellulose composites showed high onset decomposition temperature. At 10 wt% fiber loading, JBCC shows highest activation energy followed by BCC and JCC. Significant reduction in crystallinity index was shown by BCC which reduced by 14%. JBCC shows the lowest water absorption up to 43 times lower compared to UJBC. The significant improved mechanical and morphological properties of treated cellulose hybrid composites are further supported by SEM images. Hybrid composites were fabricated by hexamethylene diisocyanate (HDI) treated jute–bamboo fiber, nanoclay, tin(IV) oxide nanopowder, and low-density polyethylene. The composites were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis, and differential scanning calorimetry. Surface morphology, tensile testing, and water absorption test were also reported. FTIR results revealed that treated fiber had covalence bonding with polymer matrix which enhanced mechanical properties. All HDI treated hybrid composites showed significant improvement in activation energy, lower crystallinity index, significant high tensile strength, and Young’s modulus compared to untreated hybrid composites. All treated hybrid composites also showed extreme low water absorption. The addition of nanoclay or tin(IV) oxide into treated hybrid composites had a negative impact on thermal-mechanical properties. Surface morphological results revealed the bonding condition among hybrid composites.