Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Al2O3


Al2O3-TiO2-PMMA Bio-Composite Coating Via Electrostatic Spray Technique

Rasha A. Issa; Mohanad N. Al-Shroofy; Hanna A. Al-Kaisy

Engineering and Technology Journal, 2021, Volume 39, Issue 3A, Pages 504-511
DOI: 10.30684/etj.v39i3A.1894

This work aims preparation of polymer-based biocomposite coating by electrostatic spray method onto 316L stainless steel substrate, the present work will compare the effects of incorporation of Al2O3 and TiO2 particles at a different percentage of (10,15 and 20 % wt. from Al2O3 and TiO2 with (90,85 and 80% wt. PMMA - based electrostatic deposition coating is studied. The structure and chemical composition of composite coatings were studied by using (SEM) & (EDS) and mechanical properties (Microhardness and adhesion strength) of Al2O3-TiO2-PMMA composite coating. The SEM&EDX result showed that the composite coating to be dense with uniform dispersants and continuous with a well homogenous mixture within coating exhibits a much-increased Microhardness and remarkably improved adhesion strength.

Optical and Thermal Characterizations of PMMA Composites

Raghad S. Al-Khafaji; Kareem A. Jasim; Adil M. Ibraheim

Engineering and Technology Journal, 2019, Volume 37, Issue 2B, Pages 61-66
DOI: 10.30684/etj.37.2B.5

Thick composite films were prepared employing hand – layup method . A definite quantity of PMMA ( 98%wt ) , fixed content ( 2% wt ) of rutile titanium dioxide TiO2 , gamma alumina ( ᵞ- Al2O3 ) and Zirconia powder ( ZrO2 ) , were added to polymer solution gradually and separately. Optical constants were obtained of the prepared samples using spectrometer (UV- VIS). The prepared composite samples were thermally characterized by differential scanning calorimeter ( DSC ). We notice increasing value of glass temperature and differential heat capacity ( ∆Cp ) for composites compared with pure PMMA .