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polyethylene terephthalate

Celia Domeño, Margarita Aznar, Cristina Nerín, Francesca Isella, Mauro Fedeli, Osvaldo Bosetti
Printing inks are commonly used in multilayer plastics materials used for food packaging and compounds present in inks can migrate to the food either by diffusion through the multilayers or because of set-off phenomena. To avoid this problem the right design of the packaging is crucial. In this work, the safety by design of multilayer materials has been studied. First, the migration from 4 different multilayers manufactured using polyethylene terephthalate (PET), aluminium (Al) and polyethylene (PE) was determined...
April 21, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
Maria Hoppe, Roberta Fornari, Pim de Voogt, Roland Franz
Polyethylene terephthalate is increasingly used as food contact material for example in containers for beverage such as bottles for soft drinks, mineral water, juices and beer. Mass transport of substances present in packaging materials into the packed food and beverages is monitored to verify the food law compliance of the materials. PET is known to contain or give rise to migrants that are oligomers derived from the polymeric material. Until now their actual migration potential has been investigated only poorly...
April 21, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
Rebecca A Wilkes, Ludmilla Aristilde
Synthetic plastics, which are widely present in materials of everyday use, are ubiquitous and slow-degrading polymers in environmental wastes. Of special interest are the capabilities of microorganisms to accelerate their degradation. Members of the metabolically-diverse genus Pseudomonas are of particular interest due their capabilities to degrade and metabolize synthetic plastics. Pseudomonas species isolated from environmental matrices have been identified to degrade polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyurethane, polyethylene terephthalate, polyethylene succinate, polyethylene glycol, and polyvinyl alcohol at varying degrees of efficiency...
April 17, 2017: Journal of Applied Microbiology
Lucas Van Hoof, Peter Verbrugghe, Erik Verbeken, Tom Treasure, Nele Famaey, Bart Meuris, Paul Herijgers, Filip Rega
OBJECTIVES: Wrapping with various materials was an early treatment for aortic aneurysms. Wrapping with low-porosity vascular grafts has been associated with graft migration and vascular erosion. An alternative is to use a macroporous mesh (MPM) made of the same polymer (polyethylene terephalate). We compared the histological outcome 1 year after wrapping sheep aortas with low-porosity grafts versus MPM fabrics. METHODS: The 2 different fabrics were wrapped around the aorta of 3 sheep...
April 16, 2017: Interactive Cardiovascular and Thoracic Surgery
Ali H Tayeb, Martin Allen Hubbe, Yanxia Zhang, Orlando J Rojas
We studied the interactions of lipid molecules (linoleic acid, glycerol trilinoleate and a complex mixture of wood extractives) with hydrophilic and hydrophobic surfaces (cellulose nanofibrils, CNF, and polyethylene terephthalate, PET, respectively). The effect of lipoxygenase treatment to minimize the affinity of the lipids with the given surface was considered. Application of an electroacoustic sensing technique (QCM) allowed the monitoring of the kinetics of oxidation as well as dynamics of lipid deposition on CNF and PET...
April 14, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
Gui-Shi Liu, Jing-Shen Qiu, Duo-Hua Xu, Xianzhong Zhou, Dingyong Zhong, Han-Ping D Shieh, Bo-Ru Yang
We propose a versatile yet practical transferring technique to fabricate a high performance and extremely stable silver nanowire (AgNW) transparent electrode on arbitrary substrates. Hydroxylated poly(ethylene glycol) terephthalate (PET) or poly(dimethylsiloxane) (PDMS) deposited with AgNWs was selectively decorated to lower its polar surface energy, so that the AgNWs were easily and efficiently transferred into an epoxy resin (EPR) as a freestanding film (AgNWs-EPR) or onto various substrates. The AgNWs-EPR capped with alkanethiolate monolayers exhibits high conductivity, low roughness, ultraflexibility, and strong corrosion resistance...
April 21, 2017: ACS Applied Materials & Interfaces
Ren Wei, Wolfgang Zimmermann
Biocatalysis can enable a closed-loop recycling of post-consumer PET waste.
April 12, 2017: Microbial Biotechnology
Jianqi Zhang, Yifan Zhao, Jin Fang, Liu Yuan, Benzheng Xia, Guodong Wang, Zaiyu Wang, Yajie Zhang, Wei Ma, Wei Yan, Wenming Su, Zhixiang Wei
Large-scale fabrication of organic solar cells requires an active layer with high thickness tolerability and the use of environment-friendly solvents. Thick films with high-performance can be achieved via a ternary strategy studied herein. The ternary system consists of one polymer donor, one small molecule donor, and one fullerene acceptor. The small molecule enhances the crystallinity and face-on orientation of the active layer, leading to improved thickness tolerability compared with that of a polymer-fullerene binary system...
April 11, 2017: Small
Sebastian Krupa, Aleksandra Królikowska, Paweł Reichert
BACKGROUND: One of the goals of the synthetic materials used in knee joint reconstruction of the anterior cruciate ligament (ACL) is to improve the strength and stability of the graft immediately after the reconstruction. One of the synthetic grafts is a non-absorbable synthetic ligament device made of terephthalic polyethylene polyester fibers, the Ligament Advanced Reinforcement System (LARS). OBJECTIVES: The aim of the study was to assess postoperative knee joint stability in patients who had undergone ACL reconstruction using the LARS graft...
July 2016: Polimery W Medycynie
Angela Longo, Roberto Verucchi, Lucrezia Aversa, Roberta Tatti, Antonio Ambrosio, Emanuele Orabona, Ubaldo Coscia, Gianfranco Carotenuto, Pasqualino Maddalena
The Hummers' method for the graphite oxide (GO) preparation has been applied to graphite nanoplatelets (GNP), in order to achieve higher reaction yield and faster kinetics. Aqueous GO solutions have been used to produce uniform GO films on a polyethylene terephthalate (PET) substrate, generating graphene patterns in a controlled way (widths of few micron tens). The reduction of GO deposited on the polymeric substrate has been performed by using a Nd:YVO4 continuous-wave frequency-duplicated laser. Spectroscopic and diffractometric characterizations (FT-IR, Visible-NIR, Raman, XPS, and XRD) have shown that the reduction process induced by the laser annealing technique is mainly due to dehydration of the GO layers...
April 10, 2017: Nanotechnology
Daniel Salazar-Beltrán, Laura Hinojosa-Reyes, Edgar Ruiz-Ruiz, Aracely Hernández-Ramírez, Jorge Luis Guzmán-Mar
An on-line solid phase extraction coupled to liquid chromatography with UV detection (SPE/LC-UV) method was automated by the multisyringe flow-injection analysis (MSFIA) system for the determination of three phthalic acid esters (PAEs). The PAEs determined in drinking water stored in polyethylene terephthalate (PET) bottles of ten commercial brands were dimethyl phthalate (DMP), diethyl phthalate (DEP) and dibutyl phthalate (DBP). C18-bonded silica membrane was used for isolation and enrichment of the PAEs in water samples...
June 1, 2017: Talanta
Adam Hollerbach, Zane Baird, R Graham Cooks
The performance of a small, plastic drift tube ion mobility spectrometer (DT-IMS) is described. The IMS was manufactured using three-dimensional (3D) printing techniques and operates in the open air at ambient pressure, temperature, and humidity. The IMS housing and electrodes were printed from nonconductive polylactic acid (PLA, housing) and conductive polyethylene terephthalate glycol-modified polymer containing multiwalled carbon nanotubes (PETG-CNT, electrodes). Ring electrodes consisting of both an inner disk and an outer ring were used to prevent neutral transmission while maximizing ion transmission...
April 13, 2017: Analytical Chemistry
Chengpeng Zhang, Peiyun Yi, Linfa Peng, Jun Ni
Reflection loss can cause harmful effects on the performance of optoelectronic devices, such as cell phones, notebooks, displays, solar cells, and light-emitting diode (LED) devices. In order to obtain broadband antireflection (AR) properties, many researchers have utilized surface texture techniques to produce AR subwavelength structures on the interfaces. Among the AR subwavelength structures, the moth-eye nanostructure is one of the most promising structures, with the potential for commercialization in the near future...
April 1, 2017: Applied Optics
Ren Wei, Wolfgang Zimmermann
Petroleum-based plastics have replaced many natural materials in their former applications. With their excellent properties, they have found widespread uses in almost every area of human life. However, the high recalcitrance of many synthetic plastics results in their long persistence in the environment, and the growing amount of plastic waste ending up in landfills and in the oceans has become a global concern. In recent years, a number of microbial enzymes capable of modifying or degrading recalcitrant synthetic polymers have been identified...
March 28, 2017: Microbial Biotechnology
Xinjie Zhang, Zhixian Zhu, Zhonghua Ni, Nan Xiang, Hong Yi
This work presents the fabrication of a microfluidic autoregulatory valve which is composed of several layers of thin polymer films (i.e., polyvinyl chloride (PVC), polyethylene terephthalate (PET) double-sided tape, and polydimethylsiloxane (PDMS)). Briefly, pulsed UV laser is employed to cut the microstructures of through grooves or holes in the thermoplastic polymer films, and then the polymer-film valves are precisely assembled through laminating the PDMS membranes to the thermoplastic polymer films through the roll-lamination method...
June 2017: Biomedical Microdevices
Franz M Heindler, Fahad Alajmi, Roger Huerlimann, Chaoshu Zeng, Stephen J Newman, George Vamvounis, Lynne van Herwerden
Large amounts of plastic end up in the oceans every year where they fragment into microplastics over time. During this process, microplastics and their associated plasticizers become available for ingestion by different organisms. This study assessed the effects of microplastics (Polyethylene terephthalate; PET) and one plasticizer (Di(2-ethylhexyl)phthalate; DEHP) on mortality, productivity, population sizes and gene expression of the calanoid copepod Parvocalanus crassirostris. Copepods were exposed to DEHP for 48h to assess toxicity...
March 30, 2017: Ecotoxicology and Environmental Safety
Enock Bonyi, Zeenat Kukoyi, Oluseyi Daodu, Zainab Boone-Kukoyi, Sahin Coskun, Husnu Emrah Unalan, Kadir Aslan
Physical stability of metal nanoparticle films on planar surfaces can be increased by employing surface modification techniques and/or type of metal nanoparticles. Subsequently, the enzymatic response of colorimetric bioassays can be increased for improved dynamic range for the detection of biomolecules. Using a model bioassay b-BSA, three planar platforms (1) poly (methyl methacrylate) (PMMA) with silver thin films (STFs), (2) silver nanowires (Ag NWs) on paper and (3) indium tin oxide (ITO) on polyethylene terephthalate (PET) were evaluated to investigate the extent of increase in the colorimetric signal...
March 18, 2017: Colloids and Surfaces. B, Biointerfaces
Rok Fink, Denis Okanovič, Goran Dražič, Anže Abram, Martina Oder, Mojca Jevšnik, Klemen Bohinc
The aim of this study was to analyse the adhesion of E. coli, P. aeruginosa and S. aureus on food contact materials, such as polyethylene terephthalate, silicone, aluminium, Teflon and glass. Surface roughness, streaming potential and contact angle were measured. Bacterial properties by contact angle and specific charge density were characterised. The bacterial adhesion analysis using staining method and scanning electron microscopy showed the lowest adhesion on smooth aluminium and hydrophobic Teflon for most of the bacteria...
March 28, 2017: International Journal of Environmental Health Research
Bo Li, Zhi-Wei Wang, Qin-Bao Lin, Chang-Ying Hu
Accurate diffusion coefficient data of additives in polymer is of paramount importance for estimating the migration of the additives over time. In this article it is shown how this diffusion coefficient can be estimated for three plastic additives [2-(2'-hydroxy-5'-methylphenyl) (UV-P), 2, 6-di-tert-butyl-4-methylphenol (BHT) and di-(2-ethylhexyl) phthalate (DEHP)] in polyethylene terephthalate (PET) using the molecular dynamics (MD) simulation method. MD simulations were performed at temperatures of 293-433 K...
March 27, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
Do Kyoung Yeon, So Hyun Ki, Jeanne Choi, Sung Min Kang, Woo Kyung Cho
Curry stains on clothes and dishes in daily life inspired us to investigate the potential use of turmeric powder, the major ingredient in curry, as a universal coating material. After condition optimization, the coating solution was made by boiling and filtering a turmeric slurry, and the coating was formed at pH 3, leading to the formation of ultrathin, transparent films. Various inorganic and polymeric substrates were successfully coated with turmeric-based materials, including gold, TiO2, SiO2, glass, stainless steel, indium tin oxide, nylon, polyethylene, polycarbonate, polypropylene, acryl, and poly(ethylene terephthalate)...
April 4, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
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