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Xue Y, Guo S, Wang A, Li Q, Li J, Bai S. Surface modification and cell behavior of electronic packaging materials PET. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
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2
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Rhein F, Nirschl H, Kaegi R. Separation of Microplastic Particles from Sewage Sludge Extracts Using Magnetic Seeded Filtration. WATER RESEARCH X 2022; 17:100155. [PMID: 36177247 PMCID: PMC9513278 DOI: 10.1016/j.wroa.2022.100155] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 09/09/2022] [Accepted: 09/11/2022] [Indexed: 06/16/2023]
Abstract
Microplastic particles (MP) are efficiently retained in wastewater treatment plants and enriched in sewage sludge. For monitoring MP contents in wastewater systems, sewage sludge is thus well suited, but also requires an isolation of MP from the sludge matrix, as other sewage sludge components may interfere with the MP identification and quantification. Although organic matter in sludge samples can be removed through acid and enzymatic digestion procedures, cellulose - mainly from toilet paper - remains in the digests, due to its high chemical resistivity and similar density to MP. We apply the separation concept of magnetic seeded filtration to isolate MP through selective hetero-agglomeration with magnetic seed particles. MP and cellulose differ in their hydrophobic properties and we investigate to what extent these differences can be exploited to selectively form MP-magnetite hetero-agglomerates in the presence of cellulose. These hetero-agglomerates are subsequently separated using a magnet. Five MP types (Polyethylene terephthalate (PET), polypropylene (PP), low density polyethylene (LDPE), polyvinyl chloride (PVC) and polystyrene (PS)) and cellulose particles were mixed in different combinations with both hydrophilic and hydrophobic (silanized) magnetite particles. PET, PP, LDPE and PS only poorly agglomerated with pristine (hydrophilic) magnetite, but efficiently formed hetero-agglomerates with hydrophobic magnetite and were successfully removed from suspensions ( 80 - 100 % ). PVC agglomerated more efficiently with pristine than with hydrophobic magnetite and cellulose only agglomerated to a limited extent with either hydrophilic or hydrophobic magnetite, resulting in a high process selectivity. Results from experiments conducted at different ionic strengths and with hydrophilic and hydrophobic magnetite suggests that the agglomeration process was dominated by hydrophobic interactions. Enzymatic and oxidative treatment of the MP only marginally affected the separation efficiencies and (treated) MP spiked to sewage sludge extracts were successfully recovered using magnetic seeded filtration.
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Affiliation(s)
- Frank Rhein
- Karlsruhe Institute of Technology (KIT), Institute of Mechanical Process Engineering and Mechanics Strasse am Forum 8, Karlsruhe 76131 Germany
| | - Hermann Nirschl
- Karlsruhe Institute of Technology (KIT), Institute of Mechanical Process Engineering and Mechanics Strasse am Forum 8, Karlsruhe 76131 Germany
| | - Ralf Kaegi
- Eawag, Ueberlandstrasse 133, Dübendorf 8600 Switzerland
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Shohbuke E, Kobayashi Y, Okubayashi S. Improving the hydrophobicity/oleophobicity of polyethylene terephthalate fibrous materials using electron beam‐induced graft polymerization with 2‐(perfluorohexyl)ethyl acrylate monomer and alkyl acrylate monomer. J Appl Polym Sci 2022. [DOI: 10.1002/app.52717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Eriko Shohbuke
- Fiber Science and Engineering Kyoto Institute of Technology Kyoto Japan
| | - Yasuyuki Kobayashi
- Research division of Electronic Materials Osaka Research Institute of Industrial Science and Technology Osaka Japan
| | - Satoko Okubayashi
- Fiber Science and Engineering Kyoto Institute of Technology Kyoto Japan
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4
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Abstract
In this work, Polyethylene terephthalate (PET), one of the most widely consumed polymers, has been used as starting material for the development of non-stick surfaces through a fast, simple and scalable method based on solvent-induced crystallization to generate roughness, followed by a fluorination step. Several solvents were tested, among which dichloromethane was chosen because it gives rise to the formation of a particulate layer with rough topography. This particulate layer was covered by a polymer thin and smooth skin that must be removed to leave the rough layer as surface. The skin has been successfully removed by two strategies based on mechanical and chemical removal, each strategy producing different surface properties. A final treatment with a diluted solution of a fluorinated silane showed that it is possible to obtain PET surfaces with a water contact angle higher than 150° and low water adhesion. The reason behind this behavior is the development of a hierarchical rough profile during the induced polymer crystallization process. These surfaces were characterized by XRD, FTIR and DSC to monitor solvent induced crystallization. Topography was studied by SEM and optical profilometry. Wetting behavior was studied by measuring the contact angles and hysteresis.
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Shohbuke E, Kobayashi Y, Okubayashi S. Effects of acrylate monomers containing alkyl groups on water and oil repellent treatments of polyester fabrics. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127632] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Taheri B, De Rossi F, Lucarelli G, Castriotta LA, Di Carlo A, Brown TM, Brunetti F. Laser-Scribing Optimization for Sprayed SnO 2-Based Perovskite Solar Modules on Flexible Plastic Substrates. ACS APPLIED ENERGY MATERIALS 2021; 4:4507-4518. [PMID: 34296065 PMCID: PMC8288912 DOI: 10.1021/acsaem.1c00140] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 04/23/2021] [Indexed: 05/05/2023]
Abstract
Flexible perovskite solar cells (FPSCs) are prime candidates for applications requiring a highly efficient, low-cost, lightweight, thin, and even foldable power source. Despite record efficiencies of lab-scale flexible devices (19.5% on a 0.1 cm2 area), scalability represents a critical factor toward commercialization of FPSCs. Large-area automized deposition techniques and efficient laser scribing procedures are required to enable a high-throughput production of flexible perovskite modules (FPSMs), with the latter being much more challenging compared to glass substrates. In this work, we introduce the combined concept of laser scribing optimization and automatized spray-coating of SnO2 layers. Based on a systematic variation of the incident laser power and a comprehensive morphological and electrical analysis of laser-based cell interconnections, optimal scribing parameters are identified. Furthermore, spray-coating is used to deposit uniform compact SnO2 films on large-area (>120 cm2) plastic substrates. FPSCs with spray-coated SnO2 show comparable performance as spin-coated cells, delivering up to 15.3% efficiency on small areas under 1 sun illumination. When upscaling to large areas, FPSMs deliver 12% power conversion efficiency (PCE) and negligible hysteresis on 16.8 cm2 and 11.7% PCE on a 21.8 cm2 active area. Our perovskite devices preserved 78% efficiency when the active area increased from 0.1 to 16.8 cm2, demonstrating that our combined approach is an effective strategy for large-area manufacturing of perovskite devices on flexible substrates.
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Affiliation(s)
- Babak Taheri
- CHOSE,
Department of Electronic Engineering, Università
degli Studi di Roma Tor Vergata, Via del Politecnico 1, Rome 00133, Italy
| | - Francesca De Rossi
- CHOSE,
Department of Electronic Engineering, Università
degli Studi di Roma Tor Vergata, Via del Politecnico 1, Rome 00133, Italy
| | - Giulia Lucarelli
- CHOSE,
Department of Electronic Engineering, Università
degli Studi di Roma Tor Vergata, Via del Politecnico 1, Rome 00133, Italy
| | - Luigi Angelo Castriotta
- CHOSE,
Department of Electronic Engineering, Università
degli Studi di Roma Tor Vergata, Via del Politecnico 1, Rome 00133, Italy
| | - Aldo Di Carlo
- CHOSE,
Department of Electronic Engineering, Università
degli Studi di Roma Tor Vergata, Via del Politecnico 1, Rome 00133, Italy
- LASE−Laboratory
for Advanced Solar Energy, National University
of Science and Technology MISiS, Moscow 119049, Russia
- Institute
for Structure of Matter, National Research
Council (CNR-ISM), via
del Fosso del Cavaliere 100, Rome 00133, Italy
| | - Thomas M. Brown
- CHOSE,
Department of Electronic Engineering, Università
degli Studi di Roma Tor Vergata, Via del Politecnico 1, Rome 00133, Italy
| | - Francesca Brunetti
- CHOSE,
Department of Electronic Engineering, Università
degli Studi di Roma Tor Vergata, Via del Politecnico 1, Rome 00133, Italy
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7
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Durable functionalization of polyethylene terephthalate fabrics using metal oxides nanoparticles. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126223] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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8
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Wang ZC, Qin CQ, Zhang X, Wang Q, Li RX, Ren DF. Effect of whey protein isolate/chitosan/microcrystalline cellulose/PET multilayer bottles on the shelf life of rosebud beverages. Food Chem 2021; 347:129006. [PMID: 33472117 DOI: 10.1016/j.foodchem.2021.129006] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 12/07/2020] [Accepted: 12/31/2020] [Indexed: 12/31/2022]
Abstract
Multilayer bottles consisting of chitosan (CS), microcrystalline cellulose (MCC), whey protein isolate (WPI), and polyethylene terephthalate (PET) were tested as novel materials for packaging and extending shelf life of rosebud beverages. We studied the storage stability at 4 °C, 25 °C, 37 °C, and 55 °C by assessing the physical and biochemical parameters. The results show that multilayer PET bottles had better barrier performance and improved soluble solids content, pH, polyphenol content, color indices, and browning degree in rosebud beverages over the control at all studied temperatures. A shelf life model was established based on the Arrhenius equation, and the number of days when polyphenol contents dropped to <50% of the initial content was defined as the shelf life. Our results highlight the reliability of the prediction model, and we conclude that packaging rosebud beverages in multilayer PET bottles significantly extends the product shelf life, and this benefit was further extended at low temperatures.
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Affiliation(s)
- Zi-Chun Wang
- Beijing Key Laboratory of Forest Food Processing and Safety, College of Biological Sciences and Biotechnology, Beijing Forestry University, 100083 Beijing, People's Republic of China
| | - Chen-Qiang Qin
- Beijing Key Laboratory of Forest Food Processing and Safety, College of Biological Sciences and Biotechnology, Beijing Forestry University, 100083 Beijing, People's Republic of China
| | - Xia Zhang
- Beijing Key Laboratory of Forest Food Processing and Safety, College of Biological Sciences and Biotechnology, Beijing Forestry University, 100083 Beijing, People's Republic of China
| | - Qian Wang
- Beijing Key Laboratory of Forest Food Processing and Safety, College of Biological Sciences and Biotechnology, Beijing Forestry University, 100083 Beijing, People's Republic of China
| | - Ruo-Xuan Li
- Beijing Key Laboratory of Forest Food Processing and Safety, College of Biological Sciences and Biotechnology, Beijing Forestry University, 100083 Beijing, People's Republic of China
| | - Di-Feng Ren
- Beijing Key Laboratory of Forest Food Processing and Safety, College of Biological Sciences and Biotechnology, Beijing Forestry University, 100083 Beijing, People's Republic of China.
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Plasma-Stimulated Super-Hydrophilic Surface Finish of Polymers. Polymers (Basel) 2020; 12:polym12112498. [PMID: 33121198 PMCID: PMC7693107 DOI: 10.3390/polym12112498] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 10/26/2020] [Accepted: 10/26/2020] [Indexed: 11/25/2022] Open
Abstract
Super-hydrophilicity is a desired but rarely reported surface finish of polymer materials, so the methods for achieving such a property represent a great scientific and technological challenge. The methods reported by various authors are reviewed and discussed in this paper. The super-hydrophilic surface finish has been reported for polymers functionalized with oxygen-rich surface functional groups and of rich morphology on the sub-micrometer scale. The oxygen concentration as probed by X-ray photoelectron spectroscopy should be above 30 atomic % and the roughness as determined by atomic force microscopy over a few nm, although most authors reported the roughness was close to 100 nm. A simple one-step oxygen plasma treatment assures for super-hydrophilicity of few polymers only, but the technology enables such a surface finish of almost any fluorine-free polymer providing a capacitively coupled oxygen plasma that enables deposition of minute quantities of inorganic material is applied. More complex methods include deposition of at least one coating, followed by surface activation with oxygen plasma. Fluorinated polymers require treatment with plasma rich in hydrogen to achieve the super-hydrophilic surface finish. The stability upon aging depends largely on the technique used for super-hydrophilization.
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Gao F, Li X, Zhang X, Liu W, Liu C. Enhancement on both phosphoric acid retention and proton conduction of polybenzimidazole membranes by plasma treatment. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125197] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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11
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Viltres H, Odio OF, Biesinger MC, Montiel G, Borja R, Reguera E. Preparation of Amine‐ and Disulfide‐Containing PAMAM‐Based Dendrons for the Functionalization of Hydroxylated Surfaces: XPS as Structural Sensor. ChemistrySelect 2020. [DOI: 10.1002/slct.202000432] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Herlys Viltres
- Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada-Unidad LegariaInstituto Politécnico Nacional Ciudad de México México
| | - Oscar F. Odio
- CONACyT-Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Unidad Legaria Ciudad México México
| | | | | | - Raúl Borja
- Centro de Nanociencias y Micro-NanotecnologíasInstituto Politécnico Nacional Ciudad de México, Distrito Federal, México
| | - Edilso Reguera
- Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada-Unidad LegariaInstituto Politécnico Nacional Ciudad de México México
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12
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Surface modification of polyethylene naphthalate substrates by ultraviolet light-irradiation and assembling multilayers and their application in electroless deposition: The chemical and physical properties of the stratified structure. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.05.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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