Temat: polyethylene terephthalate - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Evaluation of the Interaction Among Microalgae Spirulina sp, Plastics Polyethylene Terephthalate and Polypropylene in Freshwater Environment
Autorzy:: Khoironi, Adian
Anggoro, Sutrisno
Sudarno, -
Powiązania:: https://bibliotekanauki.pl/articles/952383.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: plastic
polypropylene
polyethylene terephthalate
Spirulina
Opis:: The annual plastic production in Indonesia has exceeded 4.6 million tons and accumulated in the aquatic system. Polyethylene terephthalate (PET) and Polypropylene (PP) are the most widely used plastics in manufacture of packaging, fibres, and drinking bottles, etc. The degradation of these plastics to micro sizes leads to environmental threats, especially when the micro plastics interact with fresh water microorganism such as microalgae. Therefore, the study on the interaction between micro plastics and microorganisms is really important. The aim of this study was to evaluate the impact of microplastics on the growth of microalgae Spirulina sp and also to evaluate the contribution of microalgae Spirulina sp to the plastic degradation. The interaction between microalgae and microplastics was evaluated in a 1 L glass bioreactor contained microalgae Spirulina sp and PP and PET microplastics with the size of 1 mm at various concentrations (150 mg/500 mL, 250/500 mL and 275 mg/500 mL) for 112 days. The results showed that the tensile strength of micro plastic PET decreased by 0.9939 MPa/day while PP decreased by 0.1977 MPa/day. The EDX analysis of microplastics showed that the decreasing carbon in PET (48.61%) was higher as compared to PP (36.7%). FTIR analysis of Spirulina sp cells showed that the CO2 evolution of cells imposed by PET microplastic was higher than imposed by PP. The growth rate of Spirulina sp applied by micro plastic was lower than the control and the increase of microplastic concentration significantly reduced the growth rate of algae by 75%. This research concluded that biodegradation has important role in the degradation process of plastic.
Źródło:: Journal of Ecological Engineering; 2019, 20, 6; 161-173
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Review of the Thermochemical Degradation of PET: An Alternative Method of Recycling
Autorzy:: Cruz, José Nolasco
Martínez, Karla Donjuan
Zavariz, Álvaro Daniel
Hernández, Irma Pérez
Powiązania:: https://bibliotekanauki.pl/articles/2173350.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: thermal degradation
PET
polyethylene terephthalate
recycling
Opis:: Plastics play an important role in our lives due to their versatility, lightness and low production cost. They can be found in almost every industry such as automotive, construction, packaging, medical, and engineering applications among others. Polyethylene terephthalate (PET) is one of the most consumed plastics worldwide in the packaging sector, which is why its useful life is usually very short, causing serious problems due to high disposal in the environment and urban landfills. The thermochemical degradation of PET has been studied by some researchers and it has been found that its degradation products are of high added value, which is why this work focuses on presenting the results obtained in the literature.
Źródło:: Journal of Ecological Engineering; 2022, 23, 9; 319--330
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Selected Properties of Reinforcing Composite Bars for Concrete Elements Prepared from Waste Polyethylene Terephthalate (PET) Bottles
Autorzy:: Katzer, Jacek
Grzybowski, Paweł
Kobaka, Janusz
Powiązania:: https://bibliotekanauki.pl/articles/27315750.pdf
Data publikacji:: 2023
Wydawca:: Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:: concrete
waste
polyethylene terephthalate
PET
reinforcement
Opis:: A concept of producing reinforcing bars for concrete elements from waste polyethylene terephthalate (PET) bottles is presented in the paper. The proposed technology of production harnesses strips of PET cut from bottles and thermal treatment. Finally, a sand-resin coating is applied to the composite bars. Produced bars can be differentiated by utilising different numbers of strips influencing the diameter of a bar. The key mechanical properties of the bars containing 3 to 8 strips were tested during the research program. Maximum loadings and displacements were established. Problems regarding the future application of the bars in question were discussed. Areas of need for further research were pointed out.
Źródło:: Rocznik Ochrona Środowiska; 2023, 25; 188--197
1506-218X
Pojawia się w:: Rocznik Ochrona Środowiska
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: New concrete additive by chemical recycling of PET
Autorzy:: Mendivil-Escalante, J M
Almaral-Sánchez, J L
Gómez-Soberón, J M
Arredondo-Rea, S P
Corral-Higuera, R
Castro-Beltrán, A
Cabrera-Covarrubias, F G
Powiązania:: https://bibliotekanauki.pl/articles/102237.pdf
Data publikacji:: 2014
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: concrete admixture
glycolysis
polymeric resins
polyethylene terephthalate
Opis:: Due to the problem that represents the accelerated production of waste from the consumption of polyethylene terephthalate (PET), it becomes necessary to look for alternative solutions; chemical recycling is a suitable method for conversion into a material with potential application in concrete additive, such as unsaturated polyester resins; with the above improvements and conservation of non-renewable raw materials can reduce the environmental impact. This investigation was focused on obtaining the synthesis of a polymeric resin by the method of glycolysis, and their characterization by Infrared Spectroscopy (FT-IR); the results show that the recycled materials (PET and its processing) are similar to reagents made from primary materials so that it is considered feasible to use in the intended application.
Źródło:: Advances in Science and Technology. Research Journal; 2014, 8, 23; 1-5
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Evaluation of the Utility of Using Classification Algorithms when Designing New Polymer Composites
Autorzy:: Dębska, Bernardeta
Dębska, Barbara
Lichołai, Lech
Powiązania:: https://bibliotekanauki.pl/articles/123424.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: polymer mortars
waste materials
polyethylene terephthalate
discriminant analysis
decision trees
Opis:: Polymer composites are the materials that can be successfully used in the places where high mechanical strength and chemical resistance as well as low absorbability are required. These unique features of polymer composites are obtained mainly due to a suitably selected binder, i.e. a synthetic resin. At the same time, this component accounts for the high production costs of these materials. Partial substitution of the resin with glycolisates obtained using poly(ethylene terephthalate) waste (PET), helps reduce the price of polymeric mortars, while maintaining favourable physicomechanical properties. This modification method also has a beneficial effect on the environment, as it allows the utilisation of a very common waste, which is difficult to dispose of. The article concerns three types of resin mortars, i.e. epoxy, polyester and polyester with the addition of colloidal silica, modified with PET glycolisate. On the basis of the obtained data set and database knowledge mining techniques, such as discriminant analysis and decision trees, it was shown to what extent the type of resin and the presence of an added modifier differentiate the mortar properties. The results obtained with both methods were compared. It was confirmed that these techniques are effective both in the classification and prediction of the type (selection) of mortar in the process of designing new composites.
Źródło:: Journal of Ecological Engineering; 2019, 20, 8; 212-225
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Determination of Accumulated Electrons at PET Surface Using Mirror Effect Phenomena in SEM
Autorzy:: Abood, Tareq H.
Hadi, Hasan A.
Mohi, Ali T.
Powiązania:: https://bibliotekanauki.pl/articles/1192591.pdf
Data publikacji:: 2016
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Polyethylene Terephthalate
scanning electron microscope
Magnification Factor Method
Disappearing Method
Opis:: An experimental-theoretical investigation have been presented to exploring phenomena of mirror effect. The Polyethylene Terephthalate (PET) material is chosen to be a case study throughout this work. Where the scanning electron microscope (SEM) is used for executing the experiments. Attention has been focused on determination of the number of electrons that accumulated at PET surface, since it is regarded to be the most important factor for producing mirror effect images. Thus two different procedures are produced to achieve such a task namely Magnification Factor Method and Disappearing Method. Results obtained from these two approaches have clearly shown that mirror effects can accurately be used as an excellent tool to determine dielectric constant of insulator.
Źródło:: World Scientific News; 2016, 55; 27-37
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Fabrication and Properties of Self-crimp Side-by-Side Bicomponent Filaments Composed of Polyethylene Terephthalates with Different Intrinsic Viscosity
Autorzy:: Xiang, Guodong
Hua, Hongjing
Gao, Qingwen
Guo, Jingwen
Zhang, Xuzhen
Wang, Xiuhua
Powiązania:: https://bibliotekanauki.pl/articles/2171980.pdf
Data publikacji:: 2022
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:: polyethylene terephthalate
self-crimp
bicomponent filament
mechanical properties
shrinkage
crimp properties
Opis:: Self-crimp side-by-side bicomponent filaments (SBSBFs) were prepared via melt spinning using two kinds of polyethylene terephthalate (PET) with great disparity of intrinsic viscosity. The influence of the volume ratio on the surface morphology, crystallinity, crimping properties, mechanical properties and shrinkage properties of the bicomponent filaments was investigated using wide-angle X-ray diffraction, a differential scanning calorimetry (DSC), scanning electron microscope, etc. As the proportion of the low-viscosity component increases, the shrinkage in boiling water or hot air, as well as the shrinkage force and the sonic orientation factor of the bicomponent filaments decrease, and the DSC heating curves change from double peaks to a single peak. These phenomena should be ascribed to the high orientation and low crystallinity of the high-viscosity PET component and low orientation and high crystallinity of the low-viscosity PET component. Moreover, the crimp property of the bicomponent filament with a volume ratio of 50:50 is superior to those with other volume ratios.
Źródło:: Fibres & Textiles in Eastern Europe; 2022, 2 (151); 68--74
1230-3666
2300-7354
Pojawia się w:: Fibres & Textiles in Eastern Europe
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: A case of hypersensitivity pneumonitis in a worker exposed to terephthalic acid in the production of polyethylene terephthalate
Autorzy:: Sartorelli, Pietro
d'Hauw, Gabriele
Spina, Donatella
Volterrani, Luca
Mazzei, Maria Antonietta
Powiązania:: https://bibliotekanauki.pl/articles/2116710.pdf
Data publikacji:: 2020-01-17
Wydawca:: Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:: asbestos
extrinsic allergic alveolitis
polyethylene terephthalate
terephthalic acid
pulmonary fibrosis
pleural plaques
Opis:: Occupational hypersensitivity pneumonitis (OHP) is an interstitial lung disease caused by sensitization to an inhaled antigen. Polyethylene terephthalate (PET) is mainly used for disposable beverage bottles. A clinical case of hypersensitivity pneumonitis (HP) in a 66-year-old patient in the follow-up as a worker formerly exposed to asbestos is presented. At the first visit in 2012 a diagnosis of asbestosis and pleural plaques was formulated. In 2017 the high resolution computed tomography was performed demonstrating a slight progression of the pulmonary fibrosis, while physical examinations revealed inspiratory crackles on auscultation, and lung function tests showed a decreased diffusing capacity for carbon monoxide. The radiological and histological pictures were compatible with HP. From 1992 to 2013 the patient worked in a chemical company that produced PET for disposable beverage bottles. A diagnosis of OHP was made, and the most likely causative agents were terephthalic acid and dimethyl terephthalate. To the best of the authors’ knowledge, this is the first report of an OHP case in PET production.
Źródło:: International Journal of Occupational Medicine and Environmental Health; 2020, 33, 1; 119-123
1232-1087
1896-494X
Pojawia się w:: International Journal of Occupational Medicine and Environmental Health
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Engineering properties of self-compacting concrete incorporating PET fibres and recycled fine concrete aggregates
Autorzy:: Bayah, Meriem
Debieb, Farid
Kadri, El-Hadj
Bentchikou, Mohamed
Powiązania:: https://bibliotekanauki.pl/articles/27314441.pdf
Data publikacji:: 2023
Wydawca:: Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:: polyethylene terephthalate fibres
recycled fine concrete aggregates
flexural strength
self-compacting concrete
Opis:: Concrete is currently the most frequently used material in the building sector due to its favourable properties. However, the proliferation of waste poses a significant environmental problem. Over the past three decades, researchers have explored the use of construction and demolition waste (CDW) as well as plastic waste as aggregates, binders, and fibres in construction materials. This approach has emerged as a notable solution to address environmental and economic challenges. The objective of this research is to assess the impact of polyethylene terephthalate fibres (PETF) on the behaviour of self-compacting concrete (SCC) with recycled fine concrete aggregates (RFCA). Natural fine aggregates (NFA) were used as a substitute for RFCA at different mass fractions (0–100%). Additionally, four volumetric fractions (Vf) of PETF (ranging from 0.3% to 1.2%) were added, and the findings revealed an improvement in the flexural strength and modulus of elasticity of the composite material obtained. However, as the Vf content of PET fibres and RFCA increased, the compressive strength decreased, negatively affecting water absorption by immersion and capillary water absorption. Using 100% RFCA and 1.2% PETF enhanced the modulus of elasticity and flexural strength of recycled self-compacting concrete (RSCC) by up to 25% and 9%, respectively.
Źródło:: Budownictwo i Architektura; 2023, 22, 4; 71--95
1899-0665
Pojawia się w:: Budownictwo i Architektura
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Guma i politereftalan etylenu z recyklingu : składniki materiałów budowlanych
Rubber and polyethylene terephthalate from recycling : components of building materials
Autorzy:: Adamczyk-Królak, I.
Powiązania:: https://bibliotekanauki.pl/articles/2067830.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Częstochowska
Tematy:: recykling
granulat gumowy
politereftalan etylenu
materiały budowlane
recycling
granulate
polyethylene terephthalate
building materials
Opis:: W artykule przedstawiono podstawowe metody recyklingu obejmujące ponowne wykorzystanie gumy użytej do produkcji opon samochodowych oraz butelek plastikowych (tj. politereftalanu etylenu potocznie zwanego PET) ze wskazaniem możliwości ich ponownego wykorzystania w materiałach budowlanych. Przedstawiono, jak recykling gumy i politereftalanu etylenu może stanowić podstawę do uzyskiwania materiałów budowlanych, które z chwilą wykorzystania ww. produktów poodpadowych uzyskują pożądane właściwości zwiększające efektywność ich zastosowania w budowlanych rozwiązaniach materiałowo-konstrukcyjnych. Podano również przykłady takich materiałów. Zwrócono uwagę, że umiejętne gospodarowanie obejmujące wykorzystywanie omawianych odpadów przyczynia się wydatnie do ochrony środowiska naturalnego. W podsumowaniu wskazano na skuteczność zastosowań zarówno gumy, jak i płatków PET do produkcji kompozytów redukujących oddziaływania mechaniczne oraz redukujące propagację fal mechanicznych.
The article presents the basic methods of recycling including the reuse of rubber used for the production of car tires and plastic bottles (i.e. polyethylene terephthalate colloquially known as PET) with an indication of the possibility of their reuse in building materials. It was presented how the recycling of rubber and polyethylene terephthalate can form the basis for obtaining building materials, which due to the use of the above–mentioned post–waste products, obtain the desired properties that increase the efficiency of their use in building materials and construction solutions. The examples of such materials are also given. It was pointed out that the skillful management involving the use of the discussed waste contributes significantly to the protection of the natural environment. In the final summary, the effectiveness of applications of both rubber and flakes of PET for the production of composites reducing mechanical impacts and reducing the propagation of mechanical waves was indicated.
Źródło:: Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo; 2018, 24 (174); 9-12
0860-7214
Pojawia się w:: Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo
Dostawca treści:: Biblioteka Nauki

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