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polyethylene terephthalate

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https://www.readbyqxmd.com/read/29047760/electrical-and-optical-properties-of-reduced-graphene-oxide-thin-film-deposited-onto-polyethylene-terephthalate-by-spin-coating-technique
#1
Harry Anderson Rivera Tito, Anne Habermehl, Christian Müller, Sebastian Beck, Carlos Romero Nieto, Gerardo Hernández Sosa, María Esther Quintana Caceda
We present the reduction of solution processed graphene oxide films by hydrogen iodide vapor. The films were studied by Raman spectroscopy and Fourier-transform infrared spectroscopy and its optoelectronic properties characterized. We obtained reduced graphene oxide films on polyethylene terephthalate flexible substrates with good electrical properties, 3.74×10(-6)  Ω·m, and high optical transmittance of 70% in the visible range. The fabricated layers contain graphene sheets with sizes up to ∼10  μm long and ∼6  μm wide...
October 1, 2017: Applied Optics
https://www.readbyqxmd.com/read/29047650/low-cost-large-visual-field-pyroelectric-infrared-linear-device
#2
Xingyu Yang, Yuanqing Wang
In this paper, a low-cost, large-visual-field pyroelectric infrared linear device fabricated using a multisensor was reported. The multisensor has been fabricated by connecting five unit sensors to a flexible circuit whose substrate is a polyethylene terephthalate film. The fabrication process of the pyroelectric sensor, microstructure, sensor electric properties, and device performances were studied. In order to obtain a larger visual field, the multisensor has been bent a specific angle. The visual field angle (more than 180°) of the device can be much larger than a traditional linear device (132°), and this greatly improved the detection capability of the pyroelectric infrared linear device with lower cost than the other methods...
June 10, 2017: Applied Optics
https://www.readbyqxmd.com/read/29041493/flexible-all-dielectric-metasurface-fabricated-via-nanosphere-lithography-and-its-applications-in-sensing
#3
Guanqiao Zhang, Chuwen Lan, Huilong Bian, Rui Gao, Ji Zhou
In this letter, we report a flexible, all-dielectric metasurface fabricated via nanosphere lithography (NSL) and demonstrate its potentials in sensing applications. Regularly arrayed Si cylinders with hexagonal lattice fabricated on polyethylene terephthalate (PET) flexible substrate are exploited to detect applied strain and surface dielectric environment by measuring transmission spectra. Further numerical simulations coincide with experimental observations. The transmission peak can be attributed to coupled magnetic Mie resonance between close-packed Si cylinders...
September 4, 2017: Optics Express
https://www.readbyqxmd.com/read/29032258/modelling-approach-to-better-control-biofouling-in-fluidized-bed-membrane-bioreactor-for-wastewater-treatment
#4
Amine Charfi, Muhammad Aslam, Jeonghwan Kim
A mathematical model has been developed to better understand fouling mitigation mechanisms in particle-sparged membrane bioreactor. The model developed herein assumes two fouling mechanisms, (i) the pore blocking leading to the decrease in membrane surface porosity and (ii) the progressive development of compressible cake layer on the membrane surface. The model has been validated by comparison with trans-membrane pressure data registered from the bioreactor filtering a synthetic solution consisting of bentonite, sodium alginate and bovin serum albumine (BSA)...
September 28, 2017: Chemosphere
https://www.readbyqxmd.com/read/29022638/preparation-and-rgb-upconversion-optic-properties-of-transparent-anti-counterfeiting-films
#5
Weijing Yao, Qingyong Tian, Jun Liu, Qingwen Xue, Mengxiao Li, Li Liu, Qiang Lu, Wei Wu
Advanced anti-counterfeiting labels have aroused an intensive interest in packaging industry to avoid the serious issue of counterfeit. However, the preparation and cost of the existing labels associated with the drawbacks, including the complex and high-cost equipment, limit the protection of the authenticity of goods. Herein, we developed a series of anti-counterfeiting labels based on multicolor upconversion micro-particles (UCMPs) inks via straightforward and low-cost solutions, including spin-coating, stamping and screen printing...
October 12, 2017: Nanoscale
https://www.readbyqxmd.com/read/29022342/biodegradability-of-plastics-challenges-and-misconceptions
#6
Stephan Kubowicz, Andy M Booth
Plastics are one of the most widely used materials and, in most cases, they are designed to have long life times. Thus, plastics contain a complex blend of stabilizers that prevent them from degrading too quickly. Unfortunately, many of the most advantageous properties of plastics such as their chemical, physical and biological inertness and durability present challenges when plastic is released into the environment. Common plastics such as polyethylene (PE), polypropylene (PP), polystyrene (PS), and polyethylene terephthalate (PET) are extremely persistent in the environment, where they undergo very slow fragmentation (projected to take centuries) into small particles through photo-, physical, and biological degradation processes(1)...
October 12, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29019399/ingestion-of-microplastics-by-freshwater-tubifex-worms
#7
Rachel R Hurley, Jamie C Woodward, James J Rothwell
Microplastic contamination of the aquatic environment is a global issue. Microplastics can be ingested by organisms leading to negative physiological impacts. The ingestion of microplastics by freshwater invertebrates has not been reported outside the laboratory. Here we demonstrate the ingestion of microplastic particles by Tubifex tubifex in a major urban waterbody fed by the River Irwell, Manchester, UK. The host sediments had microplastic concentrations ranging from 56 to 2544 particles kg-1. 87% of the Tubifex ingested microplastic particles were microfibres (55 - 4100 µm in length), whilst the remaining 13% were fragments (50 - 4500 µm in length)...
October 11, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28992791/bisphenol-a-and-di-2-ethylhexyl-phthalate-exert-divergent-effects-on-apoptosis-and-the-wnt-%C3%AE-catenin-pathway-in-zebrafish-embryos-a-possible-mechanism-of-endocrine-disrupting-chemical-action
#8
Ünsal Veli Üstündağ, İsmail Ünal, Perihan Seda Ateş, A Ata Alturfan, Türkan Yiğitbaşı, Ebru Emekli-Alturfan
Polyethylene terephthalate (PET) and polycarbonate (PC) are the most commonly used plastics in water bottles. Di(2-ethylhexyl) phthalate (DEHP) is used as a plasticizer in PET plastics, and bisphenol A (BPA) is used to produce PC. Both DEHP and BPA are known for their potential endocrine disrupting effects. The Wnt/β-catenin signaling pathway has important roles in cell proliferation, cell specification and cell fate determination during embryonic development. Recent reports suggest a link between the Wnt/β-catenin signaling pathway and apoptosis...
January 1, 2017: Toxicology and Industrial Health
https://www.readbyqxmd.com/read/28990385/thin-coating-of-microporous-organic-network-makes-a-big-difference-sustainability-issue-of-ni-electrodes-on-the-pet-textile-for-flexible-lithium-ion-batteries
#9
Chang Wan Kang, Jaewon Choi, Yoon-Joo Ko, Sang Moon Lee, Hae Jin Kim, Jong Pil Kim, Seung Uk Son
Polyethylene terephthalate fibers (PET-Fs) were coated with microporous organic networks (MONs) by the Sonogashra coupling of tetra(4-ethynylphenyl)methane with 1,4-diiodobenzene. Ni was deposited on the PET-F@MON via electroless deposition. Interestingly, while Ni on the PET-F showed a sharp decrease in conductivity in repeated bending tests, the PET-F@MON@Ni showed excellent retention of conductivity. We suggest that thin MON layers play roles of an efficient binder for Ni attachment to fibers and a structural buffer for the relaxation of bending strain...
October 9, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28989776/flexible-transparent-electrodes-based-on-silver-nanowires-synthesized-via-a-simple-method
#10
De Li, Tao Han, Lei Zhang, Huai Zhang, Hui Chen
Silver nanowires (Ag NWs) with the length of approximately 60 µm and the diameter of approximately 300 nm are prepared via a simple, cost-effective, high-yield and eco-friendly procedure under a high molar concentration ratio of silver nitrate (AgNO3) solution to poly(vinyl pyrrolidone) solution. The pre-synthesized Ag NWs were analysed by scanning electron microscopy, X-ray diffraction and UV-visible spectrophotometer. Furthermore, the as-prepared silver nanowires were roll-coated on the surfaces of the polyethylene terephthalate (PET) substrates...
September 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28971243/quantitative-and-time-course-analysis-of-microbial-degradation-of-1h-1h-2h-2h-8h-8h-perfluorododecanol-in-activated-sludge
#11
Atsushi Arakaki, Shintaro Nakata, Takahito Tokuhisa, Yuta Ogawa, Katsuyuki Sato, Takehiro Sonoi, Stuart P Donachie, Tadashi Matsunaga
A methylene group in the fluorinated carbon backbone of 1H,1H,2H,2H,8H,8H-perfluorododecanol (degradable telomer fluoroalcohol, DTFA) renders the molecule cleavable by microbial degradation into two fluorinated carboxylic acids. Several biodegradation products of DTFA are known, but their rates of conversion and fates in the environment have not been determined. We used liquid chromatography coupled with tandem mass spectrometry (LC/MS/MS) to quantitatively investigate DTFA biodegradation by the microbial community in activated sludge in polyethylene terephthalate (PET) flasks, which we also determined here showed least adsorption of DTFA...
October 3, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28964604/screening-of-bacillus-strains-isolated-from-mangrove-ecosystems-in-peninsular-malaysia-for-microplastic-degradation
#12
H S Auta, C U Emenike, S H Fauziah
The continuous accumulation of microplastics in the environment poses ecological threats and has been an increasing problem worldwide. In this study, eight bacterial strains were isolated from mangrove sediment in Peninsular Malaysia to mitigate the environmental impact of microplastics and develop a clean-up option. The bacterial isolates were screened for their potential to degrade UV-treated microplastics from polyethylene (PE), polyethylene terephthalate (PET), polypropylene (PP), and polystyrene (PS). Only two isolates, namely, Bacillus cereus and Bacillus gottheilii, grew on a synthetic medium containing different microplastic polymers as the sole carbon source...
September 28, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28954514/guided-growth-of-ag-nanowires-by-galvanic-replacement-on-a-flexible-substrate
#13
Sanjun Yang, Qiming Liu
An aligned Ag nanowire array was directly synthesized by galvanic replacement on curved poly(ethylene terephthalate) (PET) by using a Cu2O microcrystal as a reductant. A more orderly aligned nanowire array was obtained when the curvature radius was reduced. A second growth with different orientation produced Ag nanowire networks. The guided growth was also achieved when using Zn as a reductant or polystyrene as a substrate. This plain method with facile control over the orientation and density of the Ag nanowire array enriches the grow-in-place methodology and can potentially be applied to various fields...
October 10, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28949983/hermetic-storage-of-wheat-and-maize-flour-protects-against-red-flour-beetle-tribolium-castaneum-herbst
#14
Yan Yan, Scott B Williams, Larry L Murdock, Dieudonne Baributsa
Hermetic storage is used to protect grain against insect pests, but its utility is not limited to whole grains. We evaluated hermetically-sealed, polyethylene terephthalate (PET) bottles for preserving wheat and maize flour against red flour beetle (RFB, Tribolium castaneum, Herbst) population growth. Flours infested with RFB and kept in sealed PET bottles experienced much less weight loss over a three-month storage period than infested flour kept in unsealed bottles. RFB populations in wheat flour kept in sealed bottles did not increase, while populations in unsealed bottles grew about 50-fold during the same three-month period...
2017: PloS One
https://www.readbyqxmd.com/read/28948996/hierarchical-thermoplastic-rippled-nanostructures-regulate-schwann-cell-adhesion-morphology-and-spatial-organization
#15
Cecilia Masciullo, Rossana Dell'Anna, Ilaria Tonazzini, Roman Böettger, Giancarlo Pepponi, Marco Cecchini
Periodic ripples are a variety of anisotropic nanostructures that can be realized by ion beam irradiation on a wide range of solid surfaces. Only a few authors have investigated these surfaces for tuning the response of biological systems, probably because it is challenging to directly produce them in materials that well sustain long-term cellular cultures. Here, hierarchical rippled nanotopographies with a lateral periodicity of ∼300 nm are produced from a gold-irradiated germanium mold in polyethylene terephthalate (PET), a biocompatible polymer approved by the US Food and Drug Administration for clinical applications, by a novel three-step embossing process...
October 12, 2017: Nanoscale
https://www.readbyqxmd.com/read/28946444/high-intensity-focused-ultrasound-selective-annealing-induced-patterned-and-gradient-crystallization-behavior-of-polymer
#16
Guoxia Fei, Xiaoxue Pu, Tianhao Zhuang, Bo Liu, Zhanhua Wang, Hesheng Xia
High-intensity focused ultrasound (HIFU) was developed as a spatial selective annealing method to control the crystallization behavior and performance of polymer using amorphous polyethylene terephthalate (PET) as an example for demonstration. The spatial crystallization and morphological details of HIFU induced crystallization areas at the lamellar level and spherulite scale were studied by Micro-Focus hard X-ray diffraction, small angle X-ray scattering and optical microscopy. According to the distribution of crystallinity of PET, we can indirectly detect the history of thermal distribution of the ultrasonic focal point, which is hard to obtain by other methods...
January 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28941244/migration-modelling-of-phthalate-from-non-alcoholic-beer-bottles-by-adaptive-neuro-fuzzy-inference-system
#17
Roshanak Rafiei Nazari, Simin Noorian, Majid Arabameri
BACKGROUND: There are limitations to the basic knowledge regarding various ways by which packaging components migrate into food as well as ways by which various conditions, elements and molecules related to this phenomenon are analyzed. This research aimed to model phthalate migration from polyethylene terephthalate bottles containing non-alcoholic beer by performing ANFIS analysis. RESULTS: The data showed that storage temperature, contact surface and storage period correlates with the rate of migration...
September 23, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28940995/preparation-of-cobalt-based-electrodes-by-physical-vapor-deposition-on-various-nonconductive-substrates-for-electrocatalytic-water-oxidation
#18
Yizhen Wu, Le Wang, Mingxing Chen, Zhaoxia Jin, Wei Zhang, Rui Cao
Artificial photosynthesis requires efficient anodic electrode materials for water oxidation. We herein report the facial preparation of Co metal thin films through physical vapor deposition (PVD) on various nonconductive substrates, including regular and quartz glass, mica sheet, polyimide, and polyethylene terephthalate (PET). Subsequent surface electrochemical modification using cyclic voltammetry (CV) makes these films active for electrocatalytic water oxidation by reaching a current density of 10 mA cm-2 at a low overpotential of 330 mV in 1...
September 21, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28930433/high-resolution-graphene-films-for-electrochemical-sensing-via-inkjet-maskless-lithography
#19
John A Hondred, Loreen R Stromberg, Curtis L Mosher, Jonathan C Claussen
Solution-phase printing of nanomaterial-based graphene inks are rapidly gaining interest for fabrication of flexible electronics. However, scalable manufacturing techniques for high-resolution printed graphene circuits are still lacking. Here, we report a patterning technique [i.e., inkjet maskless lithography (IML)] to form high-resolution, flexible, graphene films (line widths down to 20 μm) that significantly exceed the current inkjet printing resolution of graphene (line widths ∼60 μm). IML uses an inkjet printed polymer lacquer as a sacrificial pattern, viscous spin-coated graphene, and a subsequent graphene lift-off to pattern films without the need for prefabricated stencils, templates, or cleanroom technology (e...
September 29, 2017: ACS Nano
https://www.readbyqxmd.com/read/28929736/substrate-versatile-approach-to-robust-antireflective-and-superhydrophobic-coatings-with-excellent-self-cleaning-property-in-varied-environments
#20
Tingting Ren, Junhui He
Robust antireflective and superhydrophobic coatings are highly desired in wide applications, such as optical devices, solar cell panels, architectural and automotive glasses, lab-on chip systems, and windows for electronic devices. Meanwhile, simple, low-cost, and substrate-versatile fabrication is also essential toward real applications of such coatings. Herein, we developed a substrate-versatile strategy to fabricate robust antireflective and superhydrophobic coatings with excellent self-cleaning property in varied environments, including air and oil and after oil contamination...
October 4, 2017: ACS Applied Materials & Interfaces
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