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Online since: June 2023
Authors: Samuel Olumide Adesanya, Tunde AbdulKadri Yusuf, Adesina Taofeek Adeosun, Lazarus Rundora
Problem Formulation
The laminar flow of non-Newtonian Casson liquid through a channel with constrained porous materials and an applied magnetic field across the flow channel is investigated in this section.
Figure 6: Spectrum of eigenvalues for,,,, , Conclusions The stability analysis of a magnetohydrodynamics flow of a Casson fluid in a channel embedded with porous materials is efficaciously conducted.
Shivakumara, Magnetohydrodynamic stability of natural convection in a vertical porous slab, Journal of Magnetism and Magnetic Materials 421 (2017) 152– 164
Yadav, Stability analysis of MHD outer velocity flow on a stretching cylinder, Alexandria Engineering Journal. 57 (2018) 2077–2083 [8] X.
Muhammad, "The combined magnetohydrodynamic and electric field effect on an unsteady Maxwell nanofluid flow over stretching surface under the influence of variable heat and thermal radiation," Applied Sciences 8 (2018) 160. https://dx.doi.org/10.3390/app8020160 [26] T.A Yusuf, R.
Figure 6: Spectrum of eigenvalues for,,,, , Conclusions The stability analysis of a magnetohydrodynamics flow of a Casson fluid in a channel embedded with porous materials is efficaciously conducted.
Shivakumara, Magnetohydrodynamic stability of natural convection in a vertical porous slab, Journal of Magnetism and Magnetic Materials 421 (2017) 152– 164
Yadav, Stability analysis of MHD outer velocity flow on a stretching cylinder, Alexandria Engineering Journal. 57 (2018) 2077–2083 [8] X.
Muhammad, "The combined magnetohydrodynamic and electric field effect on an unsteady Maxwell nanofluid flow over stretching surface under the influence of variable heat and thermal radiation," Applied Sciences 8 (2018) 160. https://dx.doi.org/10.3390/app8020160 [26] T.A Yusuf, R.
Online since: February 2015
Authors: Gabriella Zsoldos, István Kocserha, András Szegedi
We would like to determine the mechanical properties of these glassy materials.
Glass Technology: European Journal of Glass Science and Technology A, February 2007, 48 (1), pp. 13-30 [2] Information on http://glassproperties.com/viscosity/Glass-Viscosity-Fixpoints.htm, [3] Szemán József: A viszkozitás szerepe az üveggyártásban, Építőanyag 58. évf. 2006. 1. szám [4] C.
Glass Technology: European Journal of Glass Science and Technology A, February 2007, 48 (1), pp. 13-30 [2] Information on http://glassproperties.com/viscosity/Glass-Viscosity-Fixpoints.htm, [3] Szemán József: A viszkozitás szerepe az üveggyártásban, Építőanyag 58. évf. 2006. 1. szám [4] C.
Online since: July 2019
Authors: Pu Wang Li, Zhang Hu, Si Tong Lu, Si Dong Li, Dong Ying Zhang
In this paper, chitosan and caffeic acid were used as starting materials to prepare chitosan caffeates by reflux-heating and freeze-drying.
Fig. 1 Chemical structure of chitosan and caffeic acid Materials and Methods Materials.
Yuan, Recent development and application of absorbable hemostatic materials, Polym.
Li, Chitosan-based composite materials for prospective hemostatic applications, Mar.
Li, Preparation and characterization of chitosan-agarose composite films, Materials. 9 (10) 816
Fig. 1 Chemical structure of chitosan and caffeic acid Materials and Methods Materials.
Yuan, Recent development and application of absorbable hemostatic materials, Polym.
Li, Chitosan-based composite materials for prospective hemostatic applications, Mar.
Li, Preparation and characterization of chitosan-agarose composite films, Materials. 9 (10) 816
Online since: March 2011
Authors: Ying Bo Chen, Li Na Liu, Yu Feng Zhang
Chen)
Tel: 86-22-24528074, Fax: 86-22-24528055
,2*, b,Yufeng Zhang1,2, c
1School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin, 300160, China
2State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University, Tianjin 300160, China
a happyliu@126.com, b chenyingbo@gmail.com, czyf9182@tjpu.edu.cn
Keywords: 3-(trimethoxysilyl) propyl methacrylate alkali treat grafting
Abstract. 3-(trimethoxysilyl) propyl methacrylate was grafted into alkali treated poly(vinylidene fluoride) (PVDF) using free radical polymerization. 1H NMR, IR and DSC spectra of the modified polymer showed that double bonds were produced on PVDF and that 3-(trimethoxysilyl)propyl methacrylate was successfully grafted to PVDF.
Introduction 3-(trimethoxysilyl)propyl methacrylate is an excellent monomer in preparing hybrid materials which possess the characteristics of organic and inorganic material[1], because it has both vinyl group which can progress free radical polymerization and siloxane group which can progress hydrolysis-condensation reaction.
The hydrolysis-condensation reaction of siloxane group is: Condensation reaction The character hydrolysis-condensation reaction of siloxane group can be concluded two main applications: on the one hand, hydrolysis reaction can produced Si—OH groups, which can improve materials’ hydrophillic nature[2] and cohesional strength by forming chemical bond with OH bond of surface of other materials; on the other hand, the main chain Si-O-Si prepared in the hydrolysis-condensation reaction possesses the property of suppleness, this property makes organosilicon polymer take on many excellent traits, such as good weather resistance and heat resistance, lower glass-transition temperature and surface free energy and so on.
Acknowledgement We gratefully acknowledge the financial support of the National Natural Science Foundation of China (50903063).
Mano: Journal of Macromolecular Science, Part A: Pure and Applied Chemistry. (2007), p. 489 [3] Xiaoyong Hu, Jinglin Tan: Coating Industry.
Introduction 3-(trimethoxysilyl)propyl methacrylate is an excellent monomer in preparing hybrid materials which possess the characteristics of organic and inorganic material[1], because it has both vinyl group which can progress free radical polymerization and siloxane group which can progress hydrolysis-condensation reaction.
The hydrolysis-condensation reaction of siloxane group is: Condensation reaction The character hydrolysis-condensation reaction of siloxane group can be concluded two main applications: on the one hand, hydrolysis reaction can produced Si—OH groups, which can improve materials’ hydrophillic nature[2] and cohesional strength by forming chemical bond with OH bond of surface of other materials; on the other hand, the main chain Si-O-Si prepared in the hydrolysis-condensation reaction possesses the property of suppleness, this property makes organosilicon polymer take on many excellent traits, such as good weather resistance and heat resistance, lower glass-transition temperature and surface free energy and so on.
Acknowledgement We gratefully acknowledge the financial support of the National Natural Science Foundation of China (50903063).
Mano: Journal of Macromolecular Science, Part A: Pure and Applied Chemistry. (2007), p. 489 [3] Xiaoyong Hu, Jinglin Tan: Coating Industry.
Online since: June 2014
Authors: Hai Xia Wu, Hai Rong Cui, Jie Yuan Cui, Shui Qing Jiang
Experimental Procedure
Compatilizer production flow
Compatilizer production flow: raw material and additive pre-processing→measurement and ingredients→mixing of materials→mix granulation by extruder→dry
Blending technological process: raw material and additive pre-processing→measurement and ingredients→mixing of materials→ two-roll mill→ mix granulation by extruder→dry→injection molding sample preparation→performance test
Fomular Group 1: Change the proportioning of PLA and PA6 respectively
Table 1.
Acknowledgements This work was financially supported by the Shandong Science and Technology Development Project (2012GB020106).
(in Chinese) [4] Liang Bo Department of Materials Science & Engineering; North University for Ethnics; Yinchuan 750021; Ningxia Hui Autonomous Region; China.Synthesis of polylactic acid[J].Journal of Clinical Rehabilitative Tissue Engineering Research.2008(23)
Research Progress on PA6 Enhancement Modification[J].Plastics Science and Technology. 2011,39(02):100-104.
(in Chinese) [9] Qian Bozhang.Domestic and Foreign Development Situation of PLA[J].New Chemical Materials. 2008(11):36-38.
Acknowledgements This work was financially supported by the Shandong Science and Technology Development Project (2012GB020106).
(in Chinese) [4] Liang Bo Department of Materials Science & Engineering; North University for Ethnics; Yinchuan 750021; Ningxia Hui Autonomous Region; China.Synthesis of polylactic acid[J].Journal of Clinical Rehabilitative Tissue Engineering Research.2008(23)
Research Progress on PA6 Enhancement Modification[J].Plastics Science and Technology. 2011,39(02):100-104.
(in Chinese) [9] Qian Bozhang.Domestic and Foreign Development Situation of PLA[J].New Chemical Materials. 2008(11):36-38.
Online since: September 2012
Authors: Jing Pei Liu, Guan Hua Zhang, Mei Hua Yang, Ai Ling Han, Fang Zhun Guo, Sheng Fang Zhang
Introduction
As a precision vacuum evaporation technology, molecular beam epitaxy (MBE) can precisely control the film thickness, composition and structure by manual control [1], and is very suitable for exploring new materials, creating new devices and studying new effects [2].
Nowadays, in China, the core technologies of EB evaporator are lacked, and the related products depend on import largely, this situation limits the domestic development of new materials greatly.
After the source material evaporating from the crucible, the molecular beam emits from the mouth of nozzle (inside diameter is 6mm) vertically.
Acknowledgement The research is supported by the Natural Science Foundation of Liaoning Province (No. 201102021), the Excellent Staff Project of Institution of Higher Education of Liaoning Province (LJQ2011048) and the Science and Technology Foundation of Dalian City (2011J21DW008).
Yang: Journal of Changchun Normal University Vol.2 (1995), p.23 [2] H.P.
Nowadays, in China, the core technologies of EB evaporator are lacked, and the related products depend on import largely, this situation limits the domestic development of new materials greatly.
After the source material evaporating from the crucible, the molecular beam emits from the mouth of nozzle (inside diameter is 6mm) vertically.
Acknowledgement The research is supported by the Natural Science Foundation of Liaoning Province (No. 201102021), the Excellent Staff Project of Institution of Higher Education of Liaoning Province (LJQ2011048) and the Science and Technology Foundation of Dalian City (2011J21DW008).
Yang: Journal of Changchun Normal University Vol.2 (1995), p.23 [2] H.P.
Online since: October 2010
Authors: Hong Lie Shen, Lin Feng Lu, Xiang Rong Zhu
Structural, magnetic and microwave absorbing properties of nanosized NixZn1-xFe2O4 powders synthesized by sol-gel technique
Xiangrong Zhu1,2,a, Linfeng Lu3,b and Honglie Shen3,c
1School of Urban Development and Environmental Engineering, Shanghai Second Polytechnic University, Shanghai 201209, China
2State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
3College of Materials Science & Technology, Nanjing University of Aeronautics & Astronautics, Nanjing, 211100, China
azhuxiangrong71@126.com, blulinfeng@nuaa.edu.cn, chlshen@nuaa.edu.cn
Keywords: Ni-Zn ferrite, Structure, Magnetic properties, Microwave absorbption, Sol-gel.
In this paper, we report the synthesis of nanosized NixZn1-xFe2O4 (x=0.4, 0.6) materials by means of sol-gel technique and investigate their structural, magnetic and microwave absorbing properties.
XQD208011), the National High-Tech R&D Program (2009AAJ140) and the Open Project Fund of State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences.
Patil, Vijaya Puri: Microelectronics Journal Vol. 39 (2008), p.248 [7] D.L.
Sci: Materials in electronics Vol. 11 (2000), p. 25
In this paper, we report the synthesis of nanosized NixZn1-xFe2O4 (x=0.4, 0.6) materials by means of sol-gel technique and investigate their structural, magnetic and microwave absorbing properties.
XQD208011), the National High-Tech R&D Program (2009AAJ140) and the Open Project Fund of State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences.
Patil, Vijaya Puri: Microelectronics Journal Vol. 39 (2008), p.248 [7] D.L.
Sci: Materials in electronics Vol. 11 (2000), p. 25
Online since: August 2015
Authors: Evgeny E. Baryshev, Tatyana Kostina, Gennady V. Tyagunov, Ksenya Yu. Shmakova
Introduction
Solders – it is a metallic materials that server as tie to joining parts of the finished product.
Amorphous metallic alloys (AMA) are a new class of materials with uncial physic-mechanical and chemical properties [5,6].
Materials and Method The temperature and concentration dependences of kinematic viscosity of liquid Cu-Ag alloys with silver content up to 99 mass percent have been studied.
Terajima, Development of Cu-Clad Metallic Glass for Soldering, Materials Science Forum, 706-709 (2012) 1343-1347
Materials science and processing, 116 (2014) 1517-1523
Amorphous metallic alloys (AMA) are a new class of materials with uncial physic-mechanical and chemical properties [5,6].
Materials and Method The temperature and concentration dependences of kinematic viscosity of liquid Cu-Ag alloys with silver content up to 99 mass percent have been studied.
Terajima, Development of Cu-Clad Metallic Glass for Soldering, Materials Science Forum, 706-709 (2012) 1343-1347
Materials science and processing, 116 (2014) 1517-1523
Online since: April 2018
Authors: Nicolae UNGUREANU, Gheorghe Iepure, Cornel Băbuţ
Gheorghe Iepure3,c
1PhD student, Faculty of Engineering, Baia Mare, Technical University of Cluj-Napoca, Romania
2Faculty of Engineering, Baia Mare,Technical University of Cluj-Napoca, Romania
3Lecturer, Mineral Resources, Materials and Enviromental Engineering Department,
Faculty of Engineering, Baia Mare, Technical University of Cluj-Napoca, Romania
aoryon68@gmail.com*, bnicolae.ungureanu@cunbm.utcluj.ro, cgheorghe.iepure@ cunbm.utcluj.ro
Keywords: Storz couplings, failure mechanisms, microscopic investigation, microstructural defects, micro-cracks
Abstract: This paper presents the results of a microscopic investigation of fractured Storz type fire hose couplings.
The investigation was carried out at the National Centre for Micro and Nanomaterials, part of the Department of Science and Engineering of Oxide Materials and Nanomaterials from the Faculty of Applied Chemistry and Materials Science at POLITEHNICA University, Bucharest.
Acknowledgements The authors gratefully acknowledge the contribution of Roxana Trușcă and Vasile Bogdan, scientific researchers at the National Micro and Nano Materials Center of the Applied Chemistry and Materials Science Faculty, Politehnica University Bucharest, who conducted the SEM and EDAX investigations.
[5] Wierzbińska M, Sieniawski J, Effect of morphology of eutectic silicon crystals on mechanical properties and cleavage fracture toughness of AlSi5Cu1 alloy, Journal of Achievements in Materials and Manufacturing Engineering, 01/2005 [6] ASM International, Aluminum-Silicon Casting Alloys: Atlas of Microfractographs, ASM International, 2004 [7] Hurtalová, L., Tillová, E., Chalupová, M., The Fractography Study Of Fatigue Fracture Surfaces In Al-Si Cast Alloys Powder, Metallurgy Progress Jurnal, Vol.15, 2015
The investigation was carried out at the National Centre for Micro and Nanomaterials, part of the Department of Science and Engineering of Oxide Materials and Nanomaterials from the Faculty of Applied Chemistry and Materials Science at POLITEHNICA University, Bucharest.
Acknowledgements The authors gratefully acknowledge the contribution of Roxana Trușcă and Vasile Bogdan, scientific researchers at the National Micro and Nano Materials Center of the Applied Chemistry and Materials Science Faculty, Politehnica University Bucharest, who conducted the SEM and EDAX investigations.
[5] Wierzbińska M, Sieniawski J, Effect of morphology of eutectic silicon crystals on mechanical properties and cleavage fracture toughness of AlSi5Cu1 alloy, Journal of Achievements in Materials and Manufacturing Engineering, 01/2005 [6] ASM International, Aluminum-Silicon Casting Alloys: Atlas of Microfractographs, ASM International, 2004 [7] Hurtalová, L., Tillová, E., Chalupová, M., The Fractography Study Of Fatigue Fracture Surfaces In Al-Si Cast Alloys Powder, Metallurgy Progress Jurnal, Vol.15, 2015
Online since: April 2010
Authors: Yong Chang Zhu, Shou Fan Rong, Ji Wei Guo, Jun Gang Li
Experimental
Materials and preparation.
[2] Y Zhou: Ceramics Material Science (Science Press, 2004)
Ji: Key Engineering Materials Vol, 324 (2006), p. 311 [4] S F.
Ma: Journal of Iron and Steel Research Vol. 14 (2007), p. 90 [6] Y Q.
Material Rewiew Vol. 14 (2000), p. 20 [7] H Song, R L.
[2] Y Zhou: Ceramics Material Science (Science Press, 2004)
Ji: Key Engineering Materials Vol, 324 (2006), p. 311 [4] S F.
Ma: Journal of Iron and Steel Research Vol. 14 (2007), p. 90 [6] Y Q.
Material Rewiew Vol. 14 (2000), p. 20 [7] H Song, R L.