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Incorporation of Oregano Essential Oil Microcapsules in Starch-Poly (butylene Adipate Co-Terephthalate) (PbAT) Films

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Macromolecular Symposia 2019年第1期383卷

作者： de Medeiros, João Augusto Salviano blick, Ana Paula Galindo, Marcella V. Alvim, Izabela D. Yamashita, Fabio Ueno, Cláudio Takeo Shirai, Marianne Ayumi Grosso, Carlos Raimundo Ferreira Corradini, Elisângela Sakanaka, Lyssa Setsuko Federal University of Technology of Paraná − Department of Materials Engineering LondrinaParana Brazil Londrina State University − Department of Food Science and Technology Londrina Parana Brazil Federal University of Technology of Paraná − Department of Food Technology LondrinaParana Brazil Institute of Food Technology − Bakery and Confectionary Technology Center LondrinaParana Brazil Federal University of Technology of Paraná − Postgraduate Program in Food Technology LondrinaParana Brazil Federal University of Technology of Paraná − Postgraduate Program in Materials Science and Engineering LondrinaParana Brazil

Summary Cassava starch and poly(butylene adipate-co-terephthalate) (PbAT) based films containing microencapsulated oregano essential oil (OEO) and free OEO are produced by blow extrusion. Microcapsules produced by ionic gelation were characterized with respect to average size, morphology, and encapsulation efficiency. The microcapsules were spherical and ranged in size from 20 to 1000 μm. Encapsulation efficiency (EE) is 83%. The films are analyzed in terms of their morphology, mechanical properties, water vapor permeability (WVP) and antibacterial properties. The films containing OEO microcapsules exhibited lower ultimate tensile strength, Young's modulus and elongation at break than the control films and the films containing free OEO. The WVP of films containing free OEO is slightly lower, while that of films containing microencapsulated OEO did not differ significantly from the control films. Scanning electron microscopy (SEM) images showed that the surface of films containing microencapsulated OEO are less homogeneous than those of the control and free OEO films. Films containing free or microencapsulated OEO presented inhibitory activity against Staphylococcus aureus, but not against Escherichia coli. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

关键词： Elastic moduli

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Experimental investigation of productivity of machining process using double tool turning

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AIP Conference Proceedings 2022年第1期2648卷

作者： Kuba Defaru Nedi Moera Gutu Jiru G. M. Sayeed Ahmed Dasari Govardhan 1Department of Mechanical Design and Manufacturing Engineering Adama Science and Technology University ADAMA Ethiopia. P.O.Box:1888 2Program of Mechanical Design and Manufacturing Engineering School of Mechanical Chemical and Materials Engineering (SoMCME) ASTU ADAMA Ethiopia. P.O.Box:1888 3Department of Mechanical Engineering Joginpally B.R Engineering College Hyderabad TS-500075 India

Machining is a globally used manufacturing technology where some part of metal is reduced from bulk workpiece in the chip form. In this thesis work, explores the science of new techniques of machining by two single point cutting tools simultaneous engaged with workpiece material to increase efficiency of the turning operation. In order to implement double tool turning process a normal lathe machine setup was altered. In turning operation, the process factors which affect machined surface quality of component are cutting speed, feed, and depth of cut. Investigation was trailed out to the improvements of productivity by this new machining technique under the influence of metal cutting factors on cutting temperature, tool wear. The morphology of chips and machining time were also studied. A comprehensive test was examined by utilising single and double tool turning process on mild steel work material. The analytically predicted metal cutting temperatures, cutting tool wear, machining time were investigated in detail. For the selected metal cutting conditions, it was recorded that the machining time reduced by 25% surprisingly which the production with this time ranges increased. Tool wear area measured by optical Profilometer shows that total wear zone 813.11mm2 for single tool turning while it was reduced to 45.57 mm2 for double tool turning.

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biomedical applications of Jones-matrix tomography to polycrystalline films of biological fuids

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Journal of Innovative Optical Health sciences 2019年第6期12卷 72-84页

作者： V.A.Ushenko A.Yu.Sdobnov W.D.Mishalov A.V.Dubolazov O.V.Olar V.T.bachinskyi A.G.Ushenko Yu.A.Ushenko O.Ya.Wanchuliak I.Meglinsk Chernivtsi National University 2 Kotsiubynskyi St. Chernivtsi58012 Ukraine Faculty of Information Technology and Electrical Engineering University of Oulu Oulu 90570Finland Shupyk National Medical Academy of Postgraduate Education 9 Dorogozhytska St.Kyiv04112 Ukraine Bukovinian State Medical University 3 Theatral Sq. Chernivtsi58000 Ukraine Interdisciplinary Laboratory of Biophotonics National Research Tomsk State University Tomsk 634050 Russia Institute of Engineering Physics for Biomedicine(PhysBio)National Research Nuclear University"MEPhI"Moscow 15409 Russia Aston Institute of Materials Research School of Engineering and Applied Science Aston University BirminghamB47ETUK School of Life and Health Sciences Aston University BirminghamB47ETUK

Algorithms for reconstruction of linear and circular birefringence-dichroism of optically thin anisotropic biological layers are *** technique of Jones matrix tomography of poly-crystalline films of biological fuids of various human organs has been developed and experimentally *** coordinate distributions of phase and amplitude anisotropy of bile films and synovial fuid taken from the knee joint are determined and statistically ***(statistical moments of 3rd and 4th orders)of differential diagnostics of early stages of cholelithiasis and septic arthritis of the knee joint with excellent balanced accuracy were *** on the diagnostic fficiency of the Jones matrix tomography method for polyerystalline plasma(liver disease),urine(albuminuria)and cytological smears(cervical cancer)are presented.

关键词： Polarization Fourier optics and signal processing imaging systems medical and biological imnaging

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Effect of mastication time on the properties of stearic acid coated pineapple leaf fiber reinforced natural rubber 13th

Effect of mastication time on the properties of stearic acid...

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13th Pure and Applied Chemistry International Conference, PACCON 2019

作者： Wongpreedee, Thapanee Mougin, Karine Amornsakchai, Taweechai Program in Materials Science and Engineering Faculty of Science Mahidol University SalayaNakhon Pathom73170 Thailand Institut de Science des Materiaux de Mulhouse IS2M-CNRS-UHA 15 Rue Jean Starcky B.P.2488-68057 Mulhouse Cedex France Department of Chemistry and Center of Excellence for Innovation in Chemistry Faculty of Science Mahidol University Phuttamonthon 4 Road SalayaNakhon Pathom73170 Thailand Center of Sustainable Energy and Green Materials Faculty of Science Mahidol University Phuttamonthon 4 Road SalayaNakhon Pathom73170 Thailand

ISBN: (纸本)9783035715521

Pineapple leaf fiber (PALF) having an average diameter and length of about 4 µm and 6 mm, respectively, was used as reinforcing element for natural rubber (NR) composites. PALF was coated with different amount of stearic acid at 10, 30 and 50 wt% of PALF. PALF-NR composites containing two levels of PALF at 5 and 10 part per hundred rubber (phr) were prepared in a two roll mill. Mastication times of 2, 4 and 8 min were used. Tensile stress-strain curves and fracture surfaces of both untreated PALF and stearic acid coated PALF (SA-PALF) reinforced NR prepared with different mastication times were compared. At a low level of PALF where aggregation was not a problem, stearic coating had an adverse effect on the mechanical properties due to the slippery PALF-rubber interface. At a high level of PALF, the coating gave composites with higher tensile strength and strain at break. Moreover, tensile strength and strain at break increased with increasing mastication time. This indicates that stearic acid coating reduces the formation of PALF aggregations and allows PALF to work effectively. © 2019 Trans Tech Publications Ltd, Switzerland.

关键词： Reinforcement

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Fabrication of organo-silica thin film for water desalination from dual silicate precursor (tetraethylorthosilicate & methyltriethoxysilane)

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AIP Conference Proceedings 2023年第1期2682卷

作者： Dewi Puspita Sari Muthia Elma Mahmud Mahmud basir basir Mita Riani Rezki Rahmawati Rahmawati Lilis Septyaningrum Gesit Satriaji Saputro Aulia Rahma 1Natural Resource and Environmental Management Department Pascasarjana Lambung Mangkurat University Jl. A. Yani KM 36 Banjarbaru 70714 Indonesia 2Chemical Engineering Department Faculty of Engineering Lambung Mangkurat University Jl. A. Yani KM 36 Banjarbaru 70714 Indonesia 4Wetland-Based Materials Research Center Lambung Mangkurat University Banjarbaru 70714 Indonesia 5Environmental Science Department Postgraduate Program Lambung Mangkurat University Jl. Brigjen H. Hasan Basri Kayu Tangi Banjarmasin 70123 Indonesia 3Environmental Engineering Department Faculty of Engineering Lambung Mangkurat University Jl. A. Yani KM 36 Banjarbaru 70714 Indonesia

A modification of silica structure is urgently needed to improve silica-based matrices applied for water desalination. It is due to the hydrophilic properties owned by pure silica structures, and it is also caused by the silica pore was collapse during ions water exposed on membrane surfaces. According to that, this study is aimed to fabricate and to observe the innovation of silica membranes modified matrices by mixing the main precursor of tetraethylorthosilicate (TEOS) and methyltriethoxysilane (MTES) as sources of silicate as well as carbon applied for water desalination. The mixtures of MTES:TEOS (10:90) was mixed with acid-base catalysts using sol gel method. This process and reaction were held for 3 h nonstop. The modified organo-silica sols were dried by oven for 24 h and grinded into powder that called xerogel. Then it was calcined using furnace for 1 h at 350 and 450 °C using RTP (rapid thermal processing) method which under variation of condition (vacuum and air/atmosphere). Functionalization of modified organo-silica membranes were investigated using FTIR spectra and Fityk software. The results show the modified organo-silica derived from MTES (as a carbon source) exhibited the functionalization of siloxane (Si-O-Si), silanol (Si-OH), and silica-carbon (Si-C) functional groups. The optimum organo-silica MTES:TEOS mixture was obtained from sample calcined at 450 °C under vacuum calcination. The presence of carbon bonds causes the pores formed tend to be small but strong so it is suitable for application in the desalination process.

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Novel carbon templated silica membrane prepared from Nypa fruticans leaf for seawater desalination

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AIP Conference Proceedings 2023年第1期2682卷

作者： Elsa Nadia Pratiwi Muthia Elma Mahmud Mahmud basir basir Mita Riani Rezki Era Nandita Radiya Oktaviana Siti Fatimah Gesit Satriaji Saputro Erdina Lulu Atika Rampun Aulia Rahma 1Natural Resource and Environmental Management Department Pascasarjana Lambung Mangkurat University Jl. A. Yani KM 36 Banjarbaru 70714 Indonesia 2Chemical Engineering Department Faculty of Engineering Lambung Mangkurat University Jl. A. Yani KM 36 Banjarbaru 70714 Indonesia 4Wetland-Based Materials Research Center Lambung Mangkurat University Banjarbaru 70714 Indonesia 5Environmental Science Department Postgraduate Program Lambung Mangkurat University Jl. Brigjen H. Hasan Basri Kayu Tangi Banjarmasin 70123 Indonesia 3Environmental Engineering Department Faculty of Engineering Lambung Mangkurat University Jl. A. Yani KM 36 Banjarbaru 70714 Indonesia

Inorganic material applied for membrane technology such as silica is well employed for water desalination nowadays. Silica membrane is favorable to use to offer high selectivity and robust materials. However, it also has a debility due to unstable matrices when contact to water. Nypa fruticans leaf was fundamentally containing carbon which is potential as templating agent to enhanced the hydro-stability. The objective of this work is to investigate performance of nypa-silica membrane for desalination of seawater. Nypa-silica membrane prepared by mixing silica sol and carbon from nypa (0.1, 0.5 and 2.5 %) for 90 min at cold temperature. Then membrane support was immersed into nypa-silica sol by dipcoater and calcined at 350 and 450°C under inert atmosphere condition via rapid thermal processing (RTP) technique. Silica-nypa membranes were tested by seawater desalination (3.5 wt% NaCl) by pervaporation. Carbon from nypa gave a good impact to silica base membrane performance depends on template loading. Increasing concentration of nypa may reduce water flux of permeate. The result of membrane in this work rather low water flux. However, all of membranes show great salt rejection >99.9%. Interestingly, the permeate salt concentration of all silica-nypa membranes performed less than 600 ppm of limited total dissolved salt on drinking water according to standards given by the World Health Organization (WHO).

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Parameter processes and their impact on Tinospora cordifolia stem extracts for antibacterial and antioxidant materials

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materials Today: Proceedings 2023年

作者： Ahmad Royani Muhammad Hanafi Puspa Dewi N. Lotulung Muhammad Eka Prastya Chandrabhan Verma Akram Alfantazi Azwar Manaf Postgraduate Program of Materials Science Study Department of Physics Faculty of Mathematics and Natural Sciences Universitas Indonesia Depok 16424 Indonesia Research Center for Metallurgy National Research and Innovation Agency (BRIN) Tangerang Selatan Banten 15314 Indonesia Research Center for Pharmaceutical Ingredients and Traditional Medicine National Research and Innovation Agency (BRIN) Tangerang Selatan Banten 15314 Indonesia Research Center for Chemistry National Research and Innovation Agency (BRIN) Tangerang Selatan Banten 15314 Indonesia Department of Chemical Engineering Khalifa University of Science and Technology P. O. Box 127788 Abu Dhabi United Arab Emirates

This work extracted the Tinospora cordifolia stem for antibacterial and antioxidant materials. The stems of T. cordifolia were extracted by using a simple maceration method. The effect of three independent variables (solvent ratios, temperature, and extraction time) was investigated to obtain optimal conditions. Ten grams of T. cordifolia were extracted using a mixture of methanol–water ratios 00:100, 15:85, 30:70, and 45:55 (% v/v) at 50–95 °C for 0.5 to 3 h. The total phenolic and flavonoid content in the T. cordifolia extracts was analyzed by Folin-Ciocalteu and Colorimetric-AlCl 3 methods. The antibacterial activities against Pseudomonas aeruginosa were assessed by serial dilution methods, and antioxidant properties were performed by DPPH methods. The optimum condition was achieved at methanol–water ratios of 00:100 % (v/v) at 95 °C for 2 h. The yield extraction for this condition is around 13.97%. The total phenolic and flavonoid contents for these conditions are about 6.85% and 7.07%, respectively. The minimum inhibitory concentration value against P. aeruginosa is 1024 µg/mL, and the minimum bacterial concentration is above 2048 µg/mL. Meanwhile, the antioxidant obtained is 217.55 µg/mL at a ratio of 00:100 methanol–water. The extraction process parameters significantly influenced the phytochemical (TPC and TFC), antibacterial activity, and antioxidant properties of T. cordifolia stem extracts. This work clearly shows the antibacterial potential of T. cordifolia stem extracts, suggesting that more investigation is required to isolate the bioactive compounds in this extract.

关键词： Antibacterial Antioxidant Maceration Parameter effect P. aeruginosa T. cordifolia

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Antioxidant Effects of Vitamin C on biomedical UHMWPE Compounds

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Macromolecular Symposia 2019年第1期383卷

作者： Souza, Vanessa C. Fim, Fabiana C. Lima, Maria Edvania A. Silva, Lucineide b. Postgraduate Program in Materials Science and Engineering – CT/ UFPB Cidade Universitária s/n João Pessoa/PBCEP: 58051-900 Brazil Cidade Universitária s/n João Pessoa/PBCEP: 58051-900 Brazil

The aim of the present study is to evaluate the antioxidant activity of ascorbic acid (Vitamin C) at concentrations of 0.5, 1.0, and 2.0% wt on biomedical Ultra High Molecular Weight Polyethylene (b-UHMWPE), using a stable free radical 2,2-diphenyl-1-picryl-hydrazyl (DPPH). The compounds are prepared by compression molding at 160 °C for 6 min, and pressure of 10 MPa. Infrared spectroscopy indicated a weak interaction between the compound constituents, at 3600, 1800, and 1500 cm−1 bands attributed to Vitamin C. Atomic force microscopy (AFM) revealed that the addition of 2.0% wt. of Vitamin C promoted b-UHMWPE crystalline particle size decreases and molecular disorder. In the presence of the vitamin, Raman spectroscopy suggested a decrease in the degree of polymer crystallinity which may be attributable to modifications in morphological aspects of the polymer. Vitamin C acted as an antioxidant agent, an important result;an increasing amount of radical is scavenged with the addition of the vitamin to the compounds. Thus, Vitamin C presents potential as an antioxidant for b-UHMWPE compounds. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

关键词： Infrared spectroscopy

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OPTIMADE, an API for exchanging materials data

arXiv

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arXiv 2021年

作者： Andersen, Casper W. Armiento, Rickard blokhin, Evgeny Conduit, Gareth J. Dwaraknath, Shyam Evans, Matthew L. Fekete, Ádám Gopakumar, Abhijith Gražulis, Saulius Merkys, Andrius Mohamed, Fawzi Oses, Corey Pizzi, Giovanni Rignanese, Gian-Marco Scheidgen, Markus Talirz, Leopold Toher, Cormac Winston, Donald Aversa, Rossella Choudhary, Kamal Colinet, Pauline Curtarolo, Stefano Di Stefano, Davide Draxl, Claudia Er, Suleyman Esters, Marco Fornari, Marco Giantomassi, Matteo Govoni, Marco Hautier, Geoffroy Hegde, Vinay Horton, Matthew K. Huck, Patrick Huhs, Georg Hummelshøj, Jens Kariryaa, Ankit Kozinsky, boris Kumbhar, Snehal Liu, Mohan Marzari, Nicola Morris, Andrew J. Mostofi, Arash A. Persson, Kristin A. Petretto, Guido Purcell, Thomas Ricci, Francesco Rose, Frisco Scheffler, Matthias Speckhard, Daniel Uhrin, Martin Vaitkus, Antanas Villars, Pierre Waroquiers, David Wolverton, Chris Wu, Michael Yang, Xiaoyu École Polytechnique Fédérale de Lausanne Lausanne1015 Switzerland Materials Design and Informatics Unit Department of Physics Chemistry and Biology Linköping University Sweden Tilde Materials Informatics Straßmannstraße 25 Berlin10249 Germany Materials Platform for Data Science Sepapaja 6 Tallinn15551 Estonia Theory of Condensed Matter Group Cavendish Laboratory 19 J.J. Thomson Avenue CambridgeCB3 0HE United Kingdom Lawrence Berkeley Labs BerkeleyCA United States Chemin des Étoiles 8 Louvain-la-Neuve1348 Belgium Department of Physics King's College London London United Kingdom Department of Materials Science and Engineering Northwestern University EvanstonIL60208 United States Institute of Biotechnology Life Science Center Vilnius University Saulétekio av. 7 VilniusLT-10257 Lithuania Institute of Computer Science Faculty of Mathematics and Informatics Vilnius University Naugarduko g. 24 VilniusLT-03225 Lithuania Fritz-Haber-Institut der Max-Planck-Gesellschaft Faradayweg 4-6 Berlin14195 Germany Center for Autonomous Materials Design Duke University DurhamNC27708 United States Department of Mechanical Engineering and Materials Science Duke University DurhamNC27708 United States Humboldt-Universität zu Berlin Institut für Physik and IRIS Adlershof Berlin12489 Germany École Polytechnique Fédérale de Lausanne Sion1951 Switzerland Trieste34136 Italy Hermann-von-Helmholtz-Platz 1 Eggenstein-Leopoldshafen76344 Germany Materials Measurement Laboratory National Institute of Standards and Technology GaithersburgMD20899 United States Ansys 300 Rustat House 62 Clifton Rd CambridgeCB1 7EG United Kingdom De Zaale 20 Eindhoven5612 AJ Netherlands Department of Physics and Science of Advanced Materials Program Central Michigan University Mount PleasantMI48859 United States Argonne National Laboratory LemontIL60439 United States Thayer School of Engineering Dartmouth College HanoverNH03755 United States Los AltosCA940

The Open Databases Integration for materials Design (OPTIMADE) consortium has designed a universal application programming interface (API) to make materials databases accessible and interoperable. We outline the first stable release of the specification, v1.0, which is already supported by many leading databases and several software packages. We illustrate the advantages of the OPTIMADE API through worked examples on each of the public materials databases that support the full API specification. © 2021, CC bY.

关键词： Specifications

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Atomic layer deposition and first principles modeling of glassy Lib>3b>bOb>3b>-Lib>2b>COb>3b> electrolytes for solid-state Li metal batteries

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JOURNAL OF materials CHEMISTRY A 2018年第40期6卷 19425-19437页

作者： Kazyak, Eric Chen, Kuan-Hung Davis, Andrew L. Yu, Seungho Sanchez, Adrian J. Lasso, Jose bielinski, Ashley R. Thompson, Travis Sakamoto, Jeff Siegel, Donald J. Dasgupta, Neil P. [a]Department of Mechanical Engineering University of Michigan Ann Arbor USA E-mail: ndasgupt@umich.edu [b] Department of Materials Science and Engineering University of Michigan Ann Arbor USA [c] Michigan Energy Institute University of Michigan Ann Arbor USA [d] Applied Physics Program University of Michigan Ann Arbor USA

Thin-film lithium solid electrolytes can serve as passivation layers, interfacial coatings, and enable 3D solid-state batteries. Here we present an Atomic Layer Deposition (ALD) process for synthesis of amorphous lithium borate-carbonate (LbCO) films. These films exhibit ionic conductivities up to 2.2 x 10(-6) S cm(-1), six times greater than previously reported for any ALD solid electrolyte. First principles calculations trace the high conductivity to contributions from enhanced rotational motion of the carbonate and borate anions achieved by precise control of Li and C content by ALD. The high conductivity, coupled with a wide band gap and electrochemical stability window, leads to a total area specific resistance (ASR) of <5 cm(2) for a 100 nm thick electrolyte and an ionic transference number >0.9999 from 0-6 volts vs. Li metal. The LbCO ALD solid electrolyte exhibits stability upon exposure to air, and in contact with both Li metal anodes and cathode materials. Thin-film full cells containing Li metal electrodes exhibit high coulombic efficiency for over 150 cycles with no capacity fading. These characteristics make glassy LbCO a promising new material for solid-state Li metal batteries.

关键词： Atomic layer deposition

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