Journal of Physical Science最新文献_第6页

Preliminary Study of the Mechanical Properties of Hybrid Fibres Reinforced Unsaturated Polyester Composites 混杂纤维增强不饱和聚酯复合材料力学性能初步研究

IF 0.7

Journal of Physical Science Pub Date : 2021-11-25 DOI: 10.21315/jps2021.32.3.4

Chek Shin Tan, M. Chan, S. Koay

{"title":"Preliminary Study of the Mechanical Properties of Hybrid Fibres Reinforced Unsaturated Polyester Composites","authors":"Chek Shin Tan, M. Chan, S. Koay","doi":"10.21315/jps2021.32.3.4","DOIUrl":"https://doi.org/10.21315/jps2021.32.3.4","url":null,"abstract":"This research project investigates the mechanical properties of the corn husk fibre reinforced unsaturated polyester composite (CHFPC) and hybrid fibre (corn husk/flax) reinforced unsaturated polyester composite (HFPC) at different fibre orientations. The tensile and flexural properties of CHFPC and HFPC were manipulated by the different degrees of fibre orientations of 0°, 45°, and 90°. Both CHFPC and HFPC with 0° of fibre orientation had the highest tensile strength and flexural strength. Moreover, the tensile and flexural modulus of specimens with 0° orientation had the highest result compared to 45° and 90° orientations. However, for the elongation at break during tensile testing, 0° orientation had the highest strain, more than unsaturated polyester (UPR) and other composites. The tensile and flexural strengths of HFPC specimens with 0° fibre orientation were higher than that of CHFPC. Besides, the tensile modulus and flexural modulus of HFPC also increased as compared to CHFPC. The elongation at break of HFPC for tensile testing had the highest strain compared to CHFPC. The results showed that the mechanical properties of the hybrid fibre composite performed better compared to the single fibre composite. Moreover, the corn husk fibre (CHF) and flax fibre (FF) acted as reinforcements to enhance the mechanical properties of the UPR composites.","PeriodicalId":16757,"journal":{"name":"Journal of Physical Science","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76160555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Luminescence and Crystalline Properties of InGaN-based LED on Si Substrate with AlN/GaN Superlattice Structure AlN/GaN超晶格结构Si衬底上ingan基LED的发光和晶体性质

IF 0.7

Journal of Physical Science Pub Date : 2021-11-25 DOI: 10.21315/jps2021.32.3.1

E. Alias, M. M. Md Taib, A. S. Abu Bakar, T. Egawa, A. Kent, W. M. Wan Ahmad Kamil, N. Zainal

{"title":"Luminescence and Crystalline Properties of InGaN-based LED on Si Substrate with AlN/GaN Superlattice Structure","authors":"E. Alias, M. M. Md Taib, A. S. Abu Bakar, T. Egawa, A. Kent, W. M. Wan Ahmad Kamil, N. Zainal","doi":"10.21315/jps2021.32.3.1","DOIUrl":"https://doi.org/10.21315/jps2021.32.3.1","url":null,"abstract":"A crack-free indium gallium nitride (InGaN) based light emitting diode (LED) grown on silicon (Si) substrate was successfully demonstrated by introducing aluminium nitride/gallium nitride (AlN/GaN) superlattice structure (SLS) in the growth of the LED. The luminescence and the crystalline properties of the LED were discussed. From photoluminescence (PL) surface mapping measurement, the emission wavelength of the LED (453 nm) was almost uniform across the LED epi-wafer area. Temperaturedependent PL revealed that the dominant emission peak of the LED was 2.77 eV at all temperatures. The emission peak was related to the quantum wells of the LED. Some additional peaks were also observed, in particular at lower temperatures. These peaks were associated to alloy fluctuations in the In0.11Ga0.89N/ In0.02Ga0.98N multiquantum wells (MQWs) of the LED. Furthermore, the dependence of PL intensity and PL decay time on temperature revealed the evidence related to indium and/or interface fluctuations of the quantum wells. From X-ray diffraction (XRD) ω-scan measurements, fringes of the AlN/GaN SLS were clear, indicating the SLS were grown with good interface abruptness. However, the fringes for the MQWs were less uniform, indicating another evidence of the alloy fluctuations in the MQWs. XRD-reciprocal surface mapping (RSM) measurement showed that all epitaxial layers of the LED were grown coherently, and the LED was fully under strain.","PeriodicalId":16757,"journal":{"name":"Journal of Physical Science","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74969263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance Evaluation of Copper and Stainless-steel Electrodes in Electrical Tomographic Imaging 电层析成像中铜和不锈钢电极的性能评价

IF 0.7

Journal of Physical Science Pub Date : 2021-11-25 DOI: 10.21315/jps2021.32.3.2

Adedibu Sunny Akingboye, A. A. Bery

{"title":"Performance Evaluation of Copper and Stainless-steel Electrodes in Electrical Tomographic Imaging","authors":"Adedibu Sunny Akingboye, A. A. Bery","doi":"10.21315/jps2021.32.3.2","DOIUrl":"https://doi.org/10.21315/jps2021.32.3.2","url":null,"abstract":"Geophysicists use electrical methods to investigate and characterise the earth’s subsurface geology. This study aims to evaluate the performance of copper and conventional stainless-steel electrodes in subsurface tomographic investigations using electrical resistivity tomography (ERT) and induced polarisation (IP) at two sites in Penang, Malaysia. Site 1 and Site 2 employed profile lengths of 200 m and 100 m, with electrodes spacing of 5.0 m and 2.5 m, respectively. In the results of the final data inversion, it was observed that the ERT and IP tomographic models of Site 1 have the best convergence limits with percentage relative differences (copper as reference model) ranging from –70% to 70%, while Site 2 recorded –8% to 8%. The electrodes performance evaluation showed that population root mean square (RMS) error and population mean absolute percentage error (MAPE) of data points between copper and stainless-steel electrodes yielded large values for Site 1 with values above 28% and that of Site 2 was less than 4%. Hence, copper (good electrical conductivity and non-polarisable) electrodes have improved the quality and quantity of infield data which give low values of population RMS error and population MAPE compared to conventional stainless-steel electrodes, especially for large unit electrode spacing surveys. Most notably, this work has contributed to the understanding of the capability of copper electrodes in providing precise and reliable inversion models for subsurface tomographic investigations in pre- and post-land uses (engineering work), hydrogeology/groundwater, environmental studies, etc.","PeriodicalId":16757,"journal":{"name":"Journal of Physical Science","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79354589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

The Physical and Mechanical Properties of Corn-based Bioplastic Films with Different Starch and Glycerol Content 不同淀粉和甘油含量玉米基生物塑料薄膜的物理力学性能

IF 0.7

Journal of Physical Science Pub Date : 2021-11-25 DOI: 10.21315/jps2021.32.3.7

Nur Nadia Nasir, Siti Amira Othman

{"title":"The Physical and Mechanical Properties of Corn-based Bioplastic Films with Different Starch and Glycerol Content","authors":"Nur Nadia Nasir, Siti Amira Othman","doi":"10.21315/jps2021.32.3.7","DOIUrl":"https://doi.org/10.21315/jps2021.32.3.7","url":null,"abstract":"Petroleum-based plastics have had a long history with varied materials and applications. However, the major drawback with these plastics is their harmful impact on the environment. Poor disposal management of these plastics have ultimately affected humans. Therefore, starch-based bioplastics have been widely used because of their renewability, sustainability and cost-effectiveness. This work investigated the effect of different concentrations of corn starch (10%, 15%, and 20% w/w of distilled water) and glycerol (20%, 30%, and 40% w/v of corn starch) on the properties of corn-based bioplastic films. Particularly, mechanical (tensile strength, Young’s modulus and elongation at break) and physical (water absorption rate and moisture content) properties were investigated. These films were prepared by the solvent casting method. It was demonstrated that the addition of 30% glycerol produced mechanical properties closest to the standard value, while films with a composition of 15% of corn starch had the most optimised value. Meanwhile, 20% glycerol and 20% corn starch produced a film with high strength and stiffness but lacked flexibility. Higher concentrations of starch and glycerol produced the highest moisture and water absorption rate. This was due to the highly hydrophilic nature of both corn starch and glycerol. However, the concentration of glycerol needs to be adjusted based on the intended use of the film. In conclusion, the concentration of corn starch and glycerol produced slightly different outcomes. Thus, the properties and application of the cornbased bioplastic films can be maximised by optimising the concentration of corn starch and glycerol.","PeriodicalId":16757,"journal":{"name":"Journal of Physical Science","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74873331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Structural and Optical Properties of MAl2O4 Spinel-type Prepared by Solution Combustion Synthesis Method for Photocatalytic Application 光催化用溶液燃烧合成法制备尖晶石型MAl2O4的结构和光学性质

IF 0.7

Journal of Physical Science Pub Date : 2021-11-25 DOI: 10.21315/jps2021.32.3.5

K. Mahi, R. Mostefa

引用次数: 0

Preliminary Study on Mechanical Properties of 3D Printed MultimaterialsABS/PC Parts: Effect of Printing Parameters 3D打印复合材料sabs /PC零件力学性能的初步研究:打印参数的影响

IF 0.7

Journal of Physical Science Pub Date : 2021-08-25 DOI: 10.21315/jps2021.32.2.7

Pui-Voon Yap, M. Chan, S. Koay

{"title":"Preliminary Study on Mechanical Properties of 3D Printed Multimaterials\u0000ABS/PC Parts: Effect of Printing Parameters","authors":"Pui-Voon Yap, M. Chan, S. Koay","doi":"10.21315/jps2021.32.2.7","DOIUrl":"https://doi.org/10.21315/jps2021.32.2.7","url":null,"abstract":"This research work highlights the mechanical properties of multi-material by fused deposition modelling (FDM). The specimens for tensile and flexural test have been printed using polycarbonate (PC) material at different combinations of printing parameters. The effects of varied printing speed, infill density and nozzle diameter on the mechanical properties of specimens have been investigated. Multi-material specimens were fabricated with acrylonitrile butadiene styrene (ABS) as the base material and PC as the reinforced material at the optimum printing parameter combination. The specimens were then subjected to mechanical testing to observe their tensile strength, Young’s modulus, percentage elongation, flexural strength and flexural modulus. The outcome of replacing half of ABS with PC to create a multi-material part has been examined. As demonstrated by the results, the optimum combination of printing parameters is 60 mm/s printing speed, 15% infill density and 0.8 mm nozzle diameter. The combination of ABS and PC materials as reinforcing material has improved the tensile strength (by 38.46%), Young’s modulus (by 23.40%), flexural strength (by 23.90%) and flexural modulus (by 37.33%) while reducing the ductility by 14.31% as compared to pure ABS. The results have been supported by data and graphs of the analysed specimens.","PeriodicalId":16757,"journal":{"name":"Journal of Physical Science","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78808418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Spanish Colonial Period Bricks from Churches in Laguna, Philippines: A Preliminary Chemical Characterisation Using X-ray Diffraction, Energy Dispersive X-ray Fluorescence and Fourier Transform Infrared 西班牙殖民时期来自菲律宾拉古纳教堂的砖块:使用x射线衍射、能量色散x射线荧光和傅里叶变换红外进行初步化学表征

IF 0.7

Journal of Physical Science Pub Date : 2021-08-25 DOI: 10.21315/jps2021.32.2.8

Jan-Michael Cayme, Arturo F. Bermejo, Chris Allen Earl T. Francia, A. N. Asor, E. Miranda

{"title":"Spanish Colonial Period Bricks from Churches in Laguna, Philippines: A Preliminary Chemical Characterisation Using X-ray Diffraction, Energy Dispersive X-ray Fluorescence and Fourier Transform Infrared","authors":"Jan-Michael Cayme, Arturo F. Bermejo, Chris Allen Earl T. Francia, A. N. Asor, E. Miranda","doi":"10.21315/jps2021.32.2.8","DOIUrl":"https://doi.org/10.21315/jps2021.32.2.8","url":null,"abstract":"Spanish Colonial Period brick samples dating to the 19th century from the Municipalities of Liliw and Pagsanjan in Laguna, Philippines was investigated. These samples were obtained from two church structures, a church bell tower from Liliw and a church convent from Pagsanjan. Combined X-ray diffraction (XRD), energy dispersive X-ray fluorescence (EDXRF) and Fourier transform infrared (FTIR) spectroscopy allowed the determination of chemical elements and minerals attributed to clay and sand, such as montmorillonite, quartz, corundum, hematite and calcite. On the basis of these compositions, the possible kilning conditions employed to fire the bricks during manufacture was also proposed. MATLAB™ programme was utilised in this study to interpret the data from XRD and FTIR to rationalise the overlapping peaks in the spectrum. Results show that both brick samples were made of clay material that is non-calcareous with low refractory. The firing was performed in an oxidising atmosphere or an open-air environment at an estimated temperature of between 650°C and 850°C. This preliminary study provides a baseline chemical characterisation data of colonial period bricks in the Philippines which will be useful for future conservation and restoration work not only locally but also within the Southeast Asian region.","PeriodicalId":16757,"journal":{"name":"Journal of Physical Science","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90737758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Effect of Post-Heating Temperature on Efficiency of Dye-Sensitized Solar Cell with ZnO:Al Thin Films Prepared by Sol-Gel Spin Coating 后加热温度对溶胶-凝胶自旋镀膜法制备ZnO:Al薄膜染料敏化太阳能电池效率的影响

IF 0.7

Journal of Physical Science Pub Date : 2021-08-25 DOI: 10.21315/jps2021.32.2.5

N. Siregar, M. Motlan, Jonny Haratua Pangabean

引用次数: 0

Mechanical and Structural Properties of Nanocarbon Particles Reinforced in Plasticised Polylactic Acid for High Strength Application 高强塑化聚乳酸增强纳米碳颗粒的力学和结构性能

IF 0.7

Journal of Physical Science Pub Date : 2021-08-25 DOI: 10.21315/jps2021.32.2.4

A. Segun, B. O. Adewuyi, Daramola Oluyemi Ojo, O. Gideon

{"title":"Mechanical and Structural Properties of Nanocarbon Particles Reinforced in Plasticised Polylactic Acid for High Strength Application","authors":"A. Segun, B. O. Adewuyi, Daramola Oluyemi Ojo, O. Gideon","doi":"10.21315/jps2021.32.2.4","DOIUrl":"https://doi.org/10.21315/jps2021.32.2.4","url":null,"abstract":"High strength application of biopolymers requires good mechanical strength. The tensile properties of polylactic acid (PLA) are relatively low for major industrial applications such as packaging, biomedical and automobile spare parts. In this study, the mechanical strength of polylactic acid was enhanced with nanocarbon isolated from diesel engine combustion soot. The isolated nanocarbon was characterised using spectrometry and Fourier transform infrared (FTIR) spectroscopy analysis. After that, the nanocarbon was used as a reinforcement in plasticised PLA to produce a composite. The PLA-nanocarbon composite was produced using the compression moulding technique. The nanocarbon composition was varied between 2 wt% and 8 wt% in the PLA matrix. The tensile, hardness and morphological properties of the composite were analysed with the tensile test, hardness test, optical microscope and X-ray diffraction (XRD) analysis. The ultraviolet (UV) spectrometer and FTIR analysis results confirmed the successful isolation of nanocarbon from the diesel engine combustion soot. The tensile and hardness properties of the PLA matrix increased with addition of nanocarbon. The morphological images showed good miscibility between the PLA and the nanocarbon reinforcement, responsible for the increase in mechanical properties. The potential use of the composite for high strength application showed great possibility based on the result obtained.","PeriodicalId":16757,"journal":{"name":"Journal of Physical Science","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75148834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

The Effects of Zinc Oxide (ZnO) Quantum Dots (QDs) Embedment on thePhysicochemical Properties and Photocatalytic Activity of Titanium Dioxide(TiO2) Nanoparticles 氧化锌(ZnO)量子点(QDs)包埋对二氧化钛(TiO2)纳米粒子物理化学性质和光催化活性的影响

IF 0.7

Journal of Physical Science Pub Date : 2021-08-25 DOI: 10.21315/jps2021.32.2.6

A. Iqbal, U. Saidu, Farook Adam, S. Sreekantan, Normawati Jasni, M. Ahmad

引用次数: 5