材料科学与应用期刊(英文)最新文献_第6页

Morphological, Biological and Physicochemical Evaluation of ABS-Based Systems Containing Graphene Obtained by 3D Printing via Solution 通过溶液3D打印获得的含有石墨烯的abs系统的形态学、生物学和物理化学评价

材料科学与应用期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/msa.2022.136023

Antônio Carlos Santos Thiele, M. Tavares

引用次数: 2

Dye Regeneration Kinetics of C343-Sensitized Nickel Oxide Investigated by Scanning Electrochemical Microscopy 扫描电化学显微镜研究c343敏化氧化镍染料再生动力学

材料科学与应用期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/msa.2022.131002

Anshebo Getachew Alemu

引用次数: 2

Arc Discharge Device Working at Atmospheric Pressure 工作于常压下的电弧放电装置

材料科学与应用期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/msa.2022.136020

Xiye Chen, Haiyong Chen, Huaidong Zhang, Z. Jiang

引用次数: 0

Preparation and Properties of pH-Responsive Intelligent Medical Dressing Based on Bacterial Cellulose/Polyacrylic Acid 细菌纤维素/聚丙烯酸智能医用敷料ph响应性能研究

材料科学与应用期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/msa.2022.133008

Fei Jiang, Wenpeng Zhang, Siyu Guo, X. Zhang

{"title":"Preparation and Properties of pH-Responsive Intelligent Medical Dressing Based on Bacterial Cellulose/Polyacrylic Acid","authors":"Fei Jiang, Wenpeng Zhang, Siyu Guo, X. Zhang","doi":"10.4236/msa.2022.133008","DOIUrl":"https://doi.org/10.4236/msa.2022.133008","url":null,"abstract":"Bacterial cellulose/polyacrylic acid (BC/PAA) pH-responsive hydrogels were prepared by free-radical polymerization (in situ) using BC as the raw material and AA as the monomer. The hydrogels were loaded with curcumin (Cur) to prepare pH-responsive intelligent medical dressings. The preparation process of the hydrogels was optimized by a single factor and response surface expe-riment using their swelling degree as an index. The structures of BC/PAA pH-responsive hydrogels were characterized by scanning electron microscope (SEM), Fourier Transform Infrared spectrometer (FTIR), X-ray diffraction (XRD), and tensile tester, and the swelling properties, mechanical properties, bacteriostatic properties, and drug release behavior were investigated. The re-sults showed that the BC/PAA pH-responsive hydrogel has a three-dimensional network structure with the swelling rate up to 1600 g/g, compressive strength of up to 8 KPa, and good mechanical properties, and the drug release behavior was in line with the logistic dynamics model, and it has good inhibitory effects on common pathogens of wound infection: E. coli, S. aureus, and P. aeruginosa.","PeriodicalId":68376,"journal":{"name":"材料科学与应用期刊(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70512758","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

Antioxidant and Cytotoxic Activities of Clove Oil Nanoparticles and Evaluation of Its Size and Retention Efficiency 丁香油纳米颗粒的抗氧化和细胞毒活性及其粒径和保留效率的评价

材料科学与应用期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/msa.2022.131003

Clara Teixeira de Oliveira, M. Tavares

引用次数: 1

Effect of Thermal Shrinkage of Extruded Sheet on Mouthguard Thickness: Influence of Model Undercut 挤压板热收缩对护齿厚度的影响:模型下切的影响

材料科学与应用期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/msa.2022.131004

Mutsumi Takahashi, Yogetsu Bando

{"title":"Effect of Thermal Shrinkage of Extruded Sheet on Mouthguard Thickness: Influence of Model Undercut","authors":"Mutsumi Takahashi, Yogetsu Bando","doi":"10.4236/msa.2022.131004","DOIUrl":"https://doi.org/10.4236/msa.2022.131004","url":null,"abstract":"The effectiveness and safety of the mouthguard are greatly affected by its thickness. The aim of this study was to investigate the effect of thermal shrinkage of the extruded sheet on the mouthguard thickness depending on the amount of undercut of the model. Mouthguard sheet was used a 4.0 mm thick eth-ylene-vinyl acetate resin manufactured by extrusion molding. The sheets were placed in the vacuum forming machine with the sheet extrusion direction ei-ther vertical (condition V) or parallel (condition P) to the model’s centerline. The working models were three hard plaster models trimmed so that the angles of the anterior teeth to the model base were 90˚, 100˚, and 110˚ (Models A, B, and C). The sheet was softened until it sagged 15 mm, and then suction was continued for 30 s. Measurement points of the mouthguard were the incisal portion (incisal edge and labial surface) and molar portion (cusp and buccal surface). The differences in the reduction rate of the thickness due to model form and extrusion direction were analyzed using two-way ANOVA and Bonferroni’s multiple comparison tests. Differences in thickness depending on the extrusion direction of the sheet were observed in Models B and C on the labial surface and in all models on the buccal surface, and the thicknesses obtained under condition P were significantly thinner than those obtained under condition V. The thicknesses of the incisal edge and the cusp were not affected by the extrusion direction. The result of","PeriodicalId":68376,"journal":{"name":"材料科学与应用期刊(英文)","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70512990","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

Influence of Morphology Pattern of Genuine Damascus Steel on the Nature of Relief of Fracture Surfaces 正品大马士革钢的形貌对断口形貌的影响

材料科学与应用期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/msa.2022.137027

D. Sukhanov

{"title":"Influence of Morphology Pattern of Genuine Damascus Steel on the Nature of Relief of Fracture Surfaces","authors":"D. Sukhanov","doi":"10.4236/msa.2022.137027","DOIUrl":"https://doi.org/10.4236/msa.2022.137027","url":null,"abstract":"It has been revealed that the structure of the transverse and longitudinal parts of the genuine Damascus knife of the XVIII century consists of troos-tite-carbide of the banding. The microhardness of the troostite layers is 450 HV; the carbide layers reach 950 HV. It is shown that such a banding structure in hardness will have a huge impact on the formation of a naturally patterned genuine Damascus structure. It is established that the form of the main drawings of the genuine Damascus pattern consists of separate elements of the topographic contour: hollows, hills, saddles, crosses and wavy dunes. It is shown that the damask pattern is a set of individual elements of the macrostructure alternating in a disordered form on different local areas of the surface. It is established that the destruction of genuine Damascus steels occurs under the action of two or more mechanisms, during the implementation of which traces remain on the surface of the fractures in the form of relief details of a mixed type. The mechanisms of mixed destruction are a combination of intragrain cleavage, micropore fusion and intergrain cracking. It is established that in order to implement the mechanism of separation of the main crack in the direction of the chopping blow, an optimum is required in the dispersion of troostite (61.8%) and carbide (38.2%) layers in genuine Damascus steel, the ratio of their volumes obeys the golden section rule. It is established that the damask pattern, consisting of elements of sinuous lines of a topographic contour, does not significantly affect the level of mechanical properties. This factor is a category of the quality of banding structures in genuine Damascus steel.","PeriodicalId":68376,"journal":{"name":"材料科学与应用期刊(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70513278","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

Study of Physical, Chemical and Thermo-Mechanical Properties of Talc Filled Polyester Resin Composite Using Styrene Monomer 苯乙烯单体滑石粉填充聚酯树脂复合材料的物理、化学和热机械性能研究

材料科学与应用期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/msa.2022.1311035

S. Yeasmin, Suraya Sabrin Soshi, M. Gafur, Mansurul Murad, S. Islam

引用次数: 0

Characterisation of Zinc Oxynitride Thin Films Prepared Using Zinc(II) Complex of Hexamethylenetetramine as the Precursor 以六亚甲基四胺锌(II)配合物为前驱体制备氮化氧化锌薄膜的表征

材料科学与应用期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/msa.2022.138029

O. O. Akinwunmi, Oluseun Philip Adelabu, A. T. Famojuro, Olakunle A. Akinwumi, Priscilla Oluwatumilara Olaopa, K. Olafisan, E. Ajayi

{"title":"Characterisation of Zinc Oxynitride Thin Films Prepared Using Zinc(II) Complex of Hexamethylenetetramine as the Precursor","authors":"O. O. Akinwunmi, Oluseun Philip Adelabu, A. T. Famojuro, Olakunle A. Akinwumi, Priscilla Oluwatumilara Olaopa, K. Olafisan, E. Ajayi","doi":"10.4236/msa.2022.138029","DOIUrl":"https://doi.org/10.4236/msa.2022.138029","url":null,"abstract":"A Zinc(II) complex of hexamethylenetetramine was prepared as a single source precursor and used to deposit zinc oxynitride thin films. The thin films were deposited on soda-lime glass substrates using the Metal Organic Chemical Vapour Deposition (MOCVD) technique at the deposition temperature of 370˚C and 390˚C, respectively. The Fourier Transform Infrared Spectroscopy (FTIR) was used to determine the functional groups in the precursor, with stretching frequency for O-H, N-H, and C-H observed. The deposited films were characterized using UV-Visible Spectroscopy, Scanning Electron Microscopy (SEM), Elemental diffraction X-ray (EDX), and X-ray Diffractometer (XRD). A direct bandgap of 3.15 eV and 3.18 eV was obtained from the film deposited at 370˚C and 390˚C, respectively, using the Envelope Method. In comparison, a bandgap of 3.19 eV and 3.21 eV was obtained using the absorption spectrum fitting (ASF) method. The SEM revealed that the film is homogeneous, dense, and compact, composed of cluster grains. The EDX confirmed the presence of Zinc, Nitrogen and Oxygen. The X-ray Diffraction indicated the polycrystalline nature of the film.","PeriodicalId":68376,"journal":{"name":"材料科学与应用期刊(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70513341","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: 2

An Investigation of Thermomechanical Behavior of Tunisian Luffa Sponges’ Fibers 突尼斯丝瓜海绵纤维的热力学行为研究

材料科学与应用期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/msa.2022.1312032

Khaled Kharrati, Madiha Salhi, Jemaa Sliman, Ridha Abdeljabar

引用次数: 2