Mohamad Syaiful Izwan Bin Alies, <br/><br/>
Effect of alumina/gnp hybrid nanoreinforcement on wetting and mechanical properties of adhesively bonded aluminium alloy  with epoxy / 
Mohamad Syaiful Izwan Bin Alies 
 - xvii, 127 pages :  illustrations (some color) ;  30 cm. +  1 CD-ROM 
<br/><br/> Faculty of Mechanical and Automotive Engineering Technology 
<br/><br/>Thesis (Master of Science) -- Universiti Malaysia Pahang – 2024 
<br/><br/>Includes bibliographical references 
<br/><br/> Hybrid nanoparticle reinforcement has demonstrated a significant increment in bonding  strength compared to polymer composites with a single nano reinforcement. However,  experimental results are rather limited and investigation regarding the parametric effects  of nano-reinforcement weight content and weight ratio combinations on the joining  strength of adhesive joining not yet been discussed comprehensively. To date, the effects  of Alumina/GNP hybrid nano reinforcement on wetting behavior, tensile properties and  fracture behavior have been studied. The correlation of that properties was studied as  well. In current study, epoxy adhesive modified with various nanoparticle content (0.5,  1.0, 1.5 and 2.0 wt%) and various weight ratio combination (10:0, 7:3, 5:5, 3:7 and 0:10  Alumina:GNP) have been fabricated into ASTM E8 and ASTM D1002 specimens. For  the tensile strength of the ASTM E8 specimen, the highest improvement (64.75%) was  demonstrated at 1.5 wt% loading, with the strongest correlation (R=0.52) between GNP ratio and tensile strength. Meanwhile, for fracture elongation, the maximum increment  (130.77%) was observed at 1.5 wt% loading, with the correlation value of R=0.65  between alumina weight ratio and fracture elongation. In lap shear joints, the highest  increases in strength and fracture elongation occurred with 1.5 wt% hybrid  nanoreinforcement content with increment up to 15.13% and 10.53% respectively as  compared to specimen with unmodified adhesive. Correlations were strongest at this  loading for both strength (R=0.89) and elongation (R=0.78). Up to 1.5wt%, increased of  alumina weight ratio improved wettability, with spread area rising by 309%. The effect  was most pronounced at 0.5 wt%. At 1.5 wt% loading, failure mechanisms showed  optimal synergistic interactions between alumina and GNP nanoparticles. A positive  relationship between shear strength and spread area was noted at higher loadings, with  the best correlation at 2.0 wt%. However, property improvements peaked at 1.0wt%. In  summary, the adhesive with 1.5 wt% Alumina/GNP hybrid nanoparticle reinforcement  demonstrated the optimal balance of enhanced tensile properties, shear strength, fracture  elongation, wettability, and failure interactions. While 2.0 wt% exhibited good propertywettability correlations, the overall improvements were marginal beyond 1.0 wt%  loading of alumina/GNP hybrid nanoreinforcement. Therefore, 1.0 wt% alumina/GNP  hybrid nanoreinforcement seems to be the optimal hybrid nanoparticle concentration and  7:3 weight ratio combination of Alumina/GNP hybrid nano reinforcement 
<br/><br/><label>ISBN: </label>THE0009960 (Local) 
<br/><br/><label>Subjects--Corporate Names: </label><br/>Faculty of Mechanical and Automotive Engineering Technology--Dissertations
<br/><br/><label>Subjects--Topical Terms: </label><br/>Universities and colleges--Dissertations<br/>Theses--Dissertations