Research Publications

Academic theses and dissertations are regularly published and widely disseminated in YUOE Journal, Monographs, Universities Research Journal (URJ), Myanmar Academy of Arts and Science (MAAS) Journal, AsTEN Research Journal and International online Journals for sharing knowledge and contributing to the development of our education.

Myanmar Academy of Art & Science List of Research

No. Researcher Title Abstract Year
361 Moe Moe Aung RADIONUCLIDE LEVELS IN COAL ASH SAMPLE DISCHARGED FROM CEMENT FACTORY This research work was to analyze the content of radionuclide in coal ash sample which collected from Myanmar Elephant cement factory, Pathein Gyi Township, Mandalay division. The HPGe detector was used for the study of radionuclide in coal ash sample and analyzed by using Gamma Vision-32 software. The radionuclide present in coal ash sample such as Bi- 207, U-235, Ac-228, Pb-212, Pb-214, Tl-208, Bi-214 and K-40 were observed. But Bi-207 and K-40 do not exactly present in coal ash sample. The radionuclide (Ac-228, Pb-212, Pb-214, Tl-208 and Bi-214) found in the measured sample was the daughter nuclei of Actinium, Uranium and Thorium series. U-235 is the parent nucleus of Actinium series. It is expected that Actinium, Uranium and Thorium are concentrated in coal ash sample. 2019
362 Min Maung Maun STRUCTURAL CHARACTERIZATION AND MAGNETIC PROPERTIES OF RUBBER FERRITE COMPOSITES Rubber ferrite composites (RFCs) were prepared by incorporating ferrites in rubber matrixes has the advantage of easy flexibility. The loading of barium ferrite and nickel ferritein natural rubber matrices(120 phr) have been prepared with rubber accelerator chemical agents and using the processes of mixing, stirring and milling. The dielectric constant of the composite as well as the ferrite filler and natural rubber vulcanization was analyzed by Instek GW 821 LCR meter. The dielectric constant decreased with increase of frequency for ceramic samples of NFO and BFO, natural rubber vulcanisate and for the RFC samples. Magnetic hysteresis was measured by using a Permagraph L apparatus at room temperature. The remanence (Br) and coercivity (Hc) were derived from the hysteresis loops. From the magnetic behaviour results, a rather low density, high coercivity, large stored energy and high flexibility rubber ferrite composites was successfully obtained. 2019
363 Sint Ohnmar PREPARATION AND CHARACTERIZATION OF CHITOSAN-BASED SOLID POLYMER ELECTROLYTE FILMS WITH ZINC ACETATE Solid polymer electrolytes based on chitosan with different weight percent ratios of zinc acetate have been prepared by the solution cast technique and then the flexible polymer electrolyte film were made. The conductivity and dielectric response of the solid polymer electrolyte systems were studied within the frequency range of 120Hz and 1kHz at room temperature. The conductivity of an electrolyte depends on the ability of the polymer host to solvate the zinc acetate. Polymers with higher dielectric constant will serve the purpose better. The dielectric constant and ionic conductivity follow the same trend with zinc acetate concentration. The dielectric constant is frequency dependent, so that the values of dielectric constant were decreased with increasing frequency. The sample containing 30 wt.% exhibited the highest room temperature conductivity of 2.44 × 10-9 S cm-1 , dielectric constant of 2.87 × 10-6 at 120Hz and 4.84 × 10-7 at 1kHz. Structural changes and complex formations of the polymer-salt systems were ascertained from x-ray diffraction (XRD). In order to check the suitability of the solid polymer electrolyte for its application in energy storage devices, polymer capacitor has been fabricated by sandwiching a separator sheet containing the electrolyte between two electrodes. The overall capacitance has been found to be of the order of 19.8 mF at the operating voltage 0.63 V. 2019
364 Thant Thant Zin STUDY ON CHARACTERIZATION OF CHITOSAN-ZnO FILM The chitosan, the naturally abundant and renewable polymers, have excellent properties such as biodegradability, bio-compatibility, non-toxicity and absorption. The polymer sample consisting of the purified chitosan powder was firstly prepared by the slow evaporation of aqueous solution. Demineralization and deproteinization processes were done to obtain purified chitosan powder. The molecular vibration spectrum of the purified chitosan powder was recorded by using Fourier Transform Infrared (FTIR) Spectroscopy. Chitosan, zinc acetate and chitosan-ZnO films were deposited onto the glass slide by using the spin-coating method. The crystalline state of chitosan powder, the chitosan-ZnO powder and the film were characterized by X-ray diffraction (XRD) and Scanning electron microscopy (SEM). The lattice microstrain of as-grown chitosan powder was calculated to be about 0.9 and it was consistent with the theoretical value of orthorhombic crystal. The crystallite size was calculated to be about 33.2 nm for the chitosan-ZnO powder. According to the XRD results, the chitosan-ZnO film has smaller crystallite size than the chitosan-ZnO powder and it was about 25.6 nm. 2019
365 Aye Thandar FEASIBILITY STUDY OF BAMBOO ASH ON CONCRETE MEMBERS This study investigates the strength performance of concrete using partial blends of cement and bamboo ash. The bamboos were dried under sunlight and burnt in air. Bamboo ash was obtained after passing the residual through 200?m sieve. Elemental analysis was conducted on bamboo ash and ordinary portland cement, OPC by EDXRF (Energy Dispersive X-ray Fluorescence) technique to evaluate its percentage composition. Bamboo ash shows pozzolanic activity and it was used as supplementary cementitious material. Bamboo ash was then used to replace OPC by weight in ratio of 0%, 5%, 10%, 15%, 20% and 25% in concrete (M-15 & M-20). Base upon the quantities of ingredients of the mixes (1:2:4), M-15 grade and mixes (1:1.5:3), M-20 grade concretes were prepared. Twelve pieces of 150 mm concrete cubes were prepared. These cubes were tested at 28 days of curing ages and then maximum load and compressive strength of cubes were determined respectively. To investigate the pozzolanic behavior of bambo ash , (95%OPC+5% bamboo ash) and (90% OPC+10% bamboo ash) concrete crushes were analyzed by XRD analysis. 2019
366 Kyauk Khe Sein ESTIMATE OF UNCERTAINTY OF MEASUREMENT IN THE DETERMINATION OF Cu, Zn, Fe IN PROFICIENCY TEST (PT) DRINKING WATER SAMPLE Nowadays, the testing and calibration laboratories have to provide high confidence and globally acceptable of measurement results in order to support the important action or decision based on it, especially for international trade and customer satisfaction. Therefore, according to guide ISO/IEC 17025, the measurements should be carried out by using validated method of analysis, defining the internal quality control procedures, participating in proficiency testing schemes and establishing the traceability and uncertainty of the measurement results. For this reason the determination of metals in drinking water requires the use of validated methods which demonstrating their robustness and reliability. In this context the estimate of uncertainty is an important tool allowing the identification the influence of each step of the analytical protocol in the overall quality of the results. In this paper, it was discussed the estimate of uncertainty during the measurement of metals (Cu, Zn and Fe) in proficiency test (PT) drinking water sample by atomic absorption spectrometry in flame mode. The concentration of Cu, Zn, Fe found in PT drinking water is 1.601 ± 0.043 mg/L, 1.061 ± 0.202 mg/L and 0.179 ± 0.095 mg/L respectively. The total uncertainty for Cu, Zn and Fe were 3%, 19%, 53% respectively. 2019
367 Nyun Win SYNERGIC SYNTHESIS ROUTE FOR THE FABRICATION OF ORGANIC-INORGANIC COMPOSITE FILM Synergic synthesis for organic-inorganic hybrid matrices has been significantly interested for a wide range of optoelectronic applications. Regarding this, efficient synthesis route for the fabrication of P(Py-2FPy)/ TiO2composite film has been studied. While inorganic TiO2 nanoparticle solution was synthesized by low temperature solution method, the fabrication of composite film was prepared by ex-situ chemical copolymerization through spin coating technique. The synergic assembly of composite film was identified and characterized by FT-IR, UV-Vis and XRD. The resulted films show that the inorganic TiO2 nanoparticles can be successfully incorporated into the organic copolymer matrix. In addition, the new fabricated organic-inorganic composite films are scalable. Thus, it can be applied in industry and will be major interest in the area of nanocomposite materials. 2019
368 Ei Shwe Sin Oo ACOUSTIC PROPERTY OF POLYURETHANE-TiO2 COMPOSITE FOAMS The acoustic property of polyurethane foam and polyurethane composite foams reinforced with different concentration (0wt%, 2wt%, 4wt% and 6wt %) of TiO2 particles were investigated. The particle size of TiO2 particle was analyzed by X-ray diffraction (XRD). The morphology of polyurethane composite foams was characterized by using optical microscopy. The acoustic property of polyurethane composite foams was measured using one microphone impedance tube method. The result show that polyurethane foam reinforced by TiO2 particles have better the sound absorption properties than pure polyurethane foam and 6 wt% of TiO2 particles reinforced in polyurethane composite foam obtain the maximum value of the sound absorption coefficient. 2019
369 Khin Win Mu FAST AND FACILE SYNTHESIS OF COPPER NANOWIRES AND THEIR APPLICATION AS CONDUCTIVE INK Copper nanowires (Cu NWs) were synthesized by a chemical reduction method under atmospheric pressure stirring at 700 rpm using Sodium Hydroxide( NaOH), Copper (II) Nitrate (Cu NO3)2, Hydrazine (N2 H4) and Ethylenediamine (C2 H8 N2) at temperature 70 ? and the synthesis time of 5 minutes. The surface morphologies of Cu NWs are analyzed by Scanning Electron Microscopy (SEM). SEM results revealed that the lengths of CuNWs were up to 40 ?m ranging in diameter from 1 ?m to 2 ?m. The size of synthesized nanoparticles accompanied with nanowire are in the range of 100 nm to 300 nm. Finally, the as-synthesized Cu NWs are dispersed well in a 0.5 wt % PVP-based ink and then coated onto glass by a Meyer rod. The electrodes fabricated by this technique exhibited good performance (sheet resistance) of 30 ?/sq. 2019
370 Mi Mu Mu Khine SYNTHESIS OF COPPER NANOPARTICLES FOR APPLICATION OF CONDUCTIVE INK This paper focused on the preparation of copper (Cu) nanoparticles from copper (II) Nitrate as metal precursor. Sodium borohydride was used as a reducing agent and polyethylene glycol and ascorbic acid were used as stabilizer. The copper particles formed were identified by UV-Vis, XRD and SEM. Small spherical copper nanoparticles and the good dispersion of nanoparticles are observed from the samples. From XRD pattern, the average crystallize size of Cu nanoparticles is 38 nm as each particle observed from SEM is not a single crystallite of Cu but the agglomerates of many single crystallites. The aggregation of nanoparticles caused the inhomogeneous size distribution. Well-dispersed stable copper based conductive ink was prepared in which the copper nanoparticles possess a excellent dispersive, monodispersed size distribution and strong anti-oxidation. From UV analysis, the absorption band in visible light region (350 nm-700 nm, plasmon peak at 588 nm). 2019