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1. Optimization of patterned polysulfone membranes for microalgae harvesting

Author:
Zhao, Zhenyu; Ilyas, Ayesha; Muylaert, Koenraad; Vankelecom, Ivo F.J.
Source:
Bioresource technology 2020 v.309 pp. 123367
ISSN:
0960-8524
Subject:
polyethylene glycol,   etc   ; fluid mechanics; fouling; harvesting; microalgae;     Show all 5 Subjects
Abstract:
... Membranes with a wave pattern on the membrane surface are now proposed for the first time to alleviate microalgal fouling and increase the membrane flux. The membrane morphology was observed via scanning electron microscope, and the clean water permeance, microalgae harvesting efficiency and membrane flux in a real broth were determined to investigate the effects of polysulfone (PSF) and polyethyl ...
DOI:
10.1016/j.biortech.2020.123367

2. Triboelectric charging of polyethylene powders: Comparison of same-material and different-material contributions to the charge build-up

Author:
Konopka, L.; Jantač, S.; Vrzáček, M.; Svoboda, M.; Kosek, J.
Source:
Powder technology 2020 v.367 pp. 713-723
ISSN:
0032-5910
Subject:
polyethylene,   etc   ; catalytic activity; polymerization; powders; vibration;     Show all 5 Subjects
Abstract:
... The understanding of triboelectric charging of industrially important powders can help in avoiding or controlling the particle agglomeration and wall sheeting. We developed a new experimental approach to study both same-material particle-particle (PP) and different-material particle-wall (PW) charging of nascent polyethylene (PE) particles born by catalytic polymerization. We constructed a simple ...
DOI:
10.1016/j.powtec.2020.04.029

3. One-step synthesis of hollow spherical polyethylene by dispersion polymerization

Author:
Gao, Rong; Guo, Zifang; Zhou, Junling; Li, Yan; Liu, Dongbing; Zhang, Xiaofan
Source:
Journal of catalysis 2020 v.385 pp. 103-106
ISSN:
0021-9517
Subject:
polyethylene,   etc   ; aluminum; catalysts; nickel; particle size; polymerization;     Show all 6 Subjects
Abstract:
... In this paper, ɑ-diimine nickel catalyst without immobilization was successfully used for one-step synthesis of spherical hollow polyethylene particles at mild condition (1.0 MPa, 25 °C) by conducting coordination dispersion polymerization. It was found 2-methyl-2-pentanol (MP) played a key role in the formation of the unusual hollow particular morphology. By varying the addition amount of MP, cha ...
DOI:
10.1016/j.jcat.2020.03.007

4. Electrostatic charging behaviour of a silica powder during pulse pneumatic conveying

Author:
Taghavivand, Milad; Cho, Benjamin J.; Mehrani, Poupak; Sowinski, Andrew
Source:
Powder technology 2020 v.366 pp. 119-129
ISSN:
0032-5910
Subject:
polyethylene,   etc   ; catalysts; electrostatic interactions; fouling; powders; silica;     Show all 6 Subjects
Abstract:
... The electrostatic charging of a dehydrated and non-dehydrated silica powder used as a catalyst support in polyethylene production was investigated using pulse pneumatic injection. The charge-to-mass ratios (Q/m) of powders were studied at varying conveying line lengths and pathways, conveying gas velocities and powder mass loadings. Results showed a direct relationship between the conveying line l ...
DOI:
10.1016/j.powtec.2020.02.031

5. Mechanistic investigation of bead-based padlock rolling circle amplification under molecular crowding conditions

Author:
Sasaki, Naoki; Kase, Chikako; Chou, Masaki; Nakazato, Genki; Sato, Kae
Source:
Analytical biochemistry 2020 v.593 pp. 113596
ISSN:
0003-2697
Subject:
polyethylene glycol,   etc   ; DNA; nucleic acid hybridization;     Show all 3 Subjects
Abstract:
... We present a mechanistic investigation of bead-based padlock rolling circle amplification (RCA) under molecular crowding conditions, a sensitive and selective DNA detection method we have developed. Several important points to optimize the method were clarified: (i) the increase in the number of RCA products is proportional to the excluded volume of poly(ethylene glycol) (PEG), (ii) PEG facilitate ...
DOI:
10.1016/j.ab.2020.113596

6. Unusual effect of flow rate on retention in analytical supercritical fluid chromatography exemplified by polyethylene glycol separation

Author:
Kostenko, Mikhail O.; Pokrovskiy, Oleg I.; Zakhodyaeva, Yulia A.; Voshkin, Andrey A.; Lunin, Valery V.
Source:
Journal of chromatography 2020 v.1610 pp. 460513
ISSN:
0021-9673
Subject:
polyethylene glycol,   etc   ; molecular weight; supercritical fluid chromatography;     Show all 3 Subjects
Abstract:
... We report a case of a peculiar effect of flow rate on retention in a separation of polyethylene glycol oligomers via supercritical fluid chromatography. During method development, we tested flow rate gradients and notices that for some PEG oligomers retention times at flow rate gradient were lower than at constant flow with the largest flow rate value used in a gradient. For instance, at BEH stati ...
DOI:
10.1016/j.chroma.2019.460513

7. Express Method for Determining the Relation between Polyethylene Biocorrosion by Chromobacterium violaceum Biofilms and Their Ability to Form Extracellular Matrix

Author:
Zhurina, M. V.; Gannesen, A. V.; Martyanov, S. V.; Plakunov, V. K.
Source:
Microbiology 2020 v.89 no.1 pp. 44-49
ISSN:
0026-2617
Subject:
polyethylene,   etc   ; Chromobacterium violaceum; biofilm; extracellular matrix;     Show all 4 Subjects
Abstract:
... An express method for measuring biocorrosion of the surface of polyethylene by mono- and multi-species microbial biofilms was developed. The method involves massive inoculation of polyethylene samples with pure microbial cultures or their mixtures, with subsequent incubation for 5‒7 days providing for the biofilm development. The damage to the surface of polyethylene was determined both by the opt ...
DOI:
10.1134/S0026261720010178

8. Critical aspects on off-line pyrolysis-based quantification of microplastic in environmental samples

Author:
Krauskopf, Lisa-Marie; Hemmerich, Hanno; Dsikowitzky, Larissa; Schwarzbauer, Jan
Source:
Journal of analytical and applied pyrolysis 2020 pp. 104830
ISSN:
0165-2370
Subject:
polyethylene; polyethylene terephthalates,   etc   ; analytical methods; environmental assessment; microplastics; poly(vinyl chloride); polypropylenes; polystyrenes; pyrolysis; quantitative analysis;     Show all 10 Subjects
Abstract:
... Although pyrolytic analysis of polymers allows a quantitative determination, reports on pyrolysis-based quantifications are very scarce, most probably as the result of some critical aspects that need to be considered. This is valid especially for environmental analysis of microplastics that require a detection at low concentrations in complex matrices.Therefore, an off-line pyrolysis approach to q ...
DOI:
10.1016/j.jaap.2020.104830

9. Facile Fabrication of Stretchable Touch-Responsive Perovskite Light-Emitting Diodes Using Robust Stretchable Composite Electrodes

Author:
Jiang, Dai-Hua; Liao, Yi-Chun; Cho, Chia-Jung; Veeramuthu, Loganathan; Liang, Fang-Cheng; Wang, Ting-Chieh; Chueh, Chu-Chen; Satoh, Toshifumi; Tung, Shih-Huang; Kuo, Chi-Ching
Source:
ACS applied materials & interfaces 2020 v.12 no.12 pp. 14408-14415
ISSN:
1944-8252
Subject:
polyethylene glycol; polyethylene terephthalates,   etc   ; electrodes; light emitting diodes; nanosilver; nanowires; polyurethanes;     Show all 7 Subjects
Abstract:
... Perovskite light-emitting diode (PeLED) has been vigorously developed in recent years. As it has demonstrated good performance on the rigid substrates, the next important direction of PeLED is its integration with stretchable components to realize stretchable, responsive device. Here, we describe a facile fabrication of stretchable perovskite light-emissive touch-responsive devices (PeLETDs) by ut ...
DOI:
10.1021/acsami.9b23291

10. Validation of near infrared spectroscopy as an age-prediction method for plastics

Author:
Alassali, Ayah; Picuno, Caterina; Bébien, Tom; Fiore, Silvia; Kuchta, Kerstin
Source:
Resources, conservation, and recycling 2020 v.154 pp. 104555
ISSN:
0921-3449
Subject:
polyethylene; polyethylene terephthalates,   etc   ; extrusion; models; near-infrared spectroscopy; oxidation; polypropylenes; prediction; styrene; temperature; wastes;     Show all 11 Subjects
Abstract:
... This work has two aims. Firstly, to validate the ability of experimental models derived through near infrared spectroscopy for acrylonitrile butadiene styrene (ABS), low-density polyethylene (LDPE), polyethylene terephthalate (PET), and polypropylene (PP) in predicting polymers’ aging; focusing on the degree of oxidation. Secondly, to assess the reliability of non-invasive age-predictive models on ...
DOI:
10.1016/j.resconrec.2019.104555

11. Microplastics in Sediments of River Yongfeng from Maanshan City, Anhui Province, China

Author:
Rao, Zhu; Niu, Siping; Zhan, Nan; Wang, Xuan; Song, Xiaolong
Source:
Bulletin of environmental contamination and toxicology 2020 v.104 no.2 pp. 166-172
ISSN:
0007-4861
Subject:
polyethylene; polyethylene terephthalates,   etc   ; microplastics; polypropylenes; polystyrenes; rivers; sediment contamination; sediments; washing; weathering; China;     Show all 11 Subjects
Abstract:
... This study was performed to evaluate the microplastics (MPs) pollution of sediments from River Yongfeng. It was observed that the MPs in sediments were present with contents of 0.5–16.75 mg/kg and abundances of 5–72 items/kg, coupled by variation coefficients of 109% and 91%, respectively, indicating that the distribution of MPs had high spatial variation. The land-based source of business zone is ...
DOI:
10.1007/s00128-019-02771-2

12. Preparation and characterization of composite fibrous membranes for oil spill cleanup

Author:
Dong, Xuan; Zheng, Yuansheng; Xin, Binjie; Lin, Lantian; Zhang, Fuli
Source:
Textile research journal 2020 v.90 no.3-4 pp. 313-322
ISSN:
1746-7748
Subject:
polyethylene; polyethylene terephthalates,   etc   ; absorption; nonwoven fabrics; oil spills; oils; polyacrylonitrile; tensile strength; textile fibers; wastewater; wettability;     Show all 11 Subjects
Abstract:
... In this study, polyacrylonitrile (PAN) electrospun fibrous membranes were manufactured and applied for oil spill cleanup. Two kinds of composite fibrous membranes composed of PAN electrospun fibrous membranes and polyethylene/polyethylene terephthalate (PE/PET) core-shell fiber nonwoven fabric were fabricated. The fibrous structure, mechanical properties and surface wettability for water and oil, ...
DOI:
10.1177/0040517519865042

13. Production of an Alternative Fuel by Pyrolysis of Plastic Wastes Mixtures

Author:
Quesada, Lucía; Calero, Mónica; Martín-Lara, María Ángeles; Pérez, Antonio; Blázquez, Gabriel
Source:
Energy & fuels 2020 v.34 no.2 pp. 1781-1790
ISSN:
1520-5029
Subject:
polyethylene; polyethylene film,   etc   ; alkenes; alternative fuels; aromatic compounds; liquids; polypropylenes; polystyrenes; pyrolysis; viscosity; wastes;     Show all 11 Subjects
Abstract:
... This paper tries to obtain an alternative liquid fuel from plastic waste from the fraction not collected selectively, through a pyrolysis process. The fuels obtained from three plastic wastes, polyethylene (PE), polypropylene (PP), and polystyrene (PS), and from binary mixtures (PE–PP and PE–PS) and a tertiary mixture (PE–PP–PS) were characterized. These plastic wastes are the most abundant in the ...
DOI:
10.1021/acs.energyfuels.9b03350

14. Concentration Dependence of the Extensional Relaxation Time and Finite Extensibility in Dilute and Semidilute Polymer Solutions Using a Microfluidic Rheometer

Author:
Kim, Seo Gyun; Lee, Heon Sang
Source:
Macromolecules 2019 v.52 no.24 pp. 9585-9593
ISSN:
1520-5835
Subject:
polyethylene glycol,   etc   ; extensibility; rheometers;     Show all 3 Subjects
Abstract:
... We investigated the composition dependence of the finite extensible nonlinear elastic (FENE) constant of poly(ethylene oxide) (PEO) solutions by the Tikhonov regularization method with the measured normal stress in microfluidic channels. We measured the normal stress of the PEO solutions in response to the extensional flows in microfluidic channels. Additionally, we extracted the extensional relax ...
DOI:
10.1021/acs.macromol.9b01143

15. Correction: Silica cubosomes templated by a star polymer

Author:
Cui, Congcong; Han, Lu; Che, Shunai
Source:
RSC advances 2019 v.9 no.47 pp. 27475
ISSN:
2046-2069
Subject:
polyethylene glycol,   etc   ; polystyrenes; silica;     Show all 3 Subjects
Abstract:
... Correction for ‘Silica cubosomes templated by a star polymer’ by Congcong Cui et al., RSC Adv., 2019, 9, 6118–6124. ...
DOI:
10.1039/c9ra90064k

16. Role of Controlled Diameter of Polyamide 6 (PA6) Fibers on the Formation of Interfacial Hybrid Crystal Morphology in HDPE/PA6 Microfibril Blend

Author:
Liu, Lei; Huang, Yan-Hao; Xie, Dan-Dan; Chen, Li-Bo; Chen, Rui; Liu, Zheng-Ying; Yang, Wei; Yang, Ming-Bo
Source:
Industrial & engineering chemistry process design and development 2019 v.58 no.21 pp. 9056-9064
ISSN:
1520-5045
Subject:
polyethylene,   etc   ; melting; polyamides;     Show all 3 Subjects
Abstract:
... In this work, polyamide 6 (PA6) fibers with various diameters distribution (0.18–5.6 μm) were initially prepared by using different hot drawing rates during the in-situ fiberforming process. The results showed that the PA6 fibers with smaller diameters were well-distributed in the high-density polyethylene (HDPE) matrix as the stretching rate increased. Hybrid shish-kebab (HSK) structures could be ...
DOI:
10.1021/acs.iecr.9b01045

17. Distribution of microplastics in Surabaya River, Indonesia

Author:
Lestari, Prieskarinda; Trihadiningrum, Yulinah; Wijaya, Bagas Ari; Yunus, Khalda Ardelia; Firdaus, Muhammad
Source:
The Science of the total environment 2020 v.726 pp. 138560
ISSN:
0048-9697
Subject:
polyethylene,   etc   ; color; industrial wastes; irrigation; microplastics; polypropylenes; rivers; Indonesia;     Show all 8 Subjects
Abstract:
... Surabaya River is one of the lower tributary of the Brantas, which is included as the top 20 plastic polluted rivers worldwide. The main function of Surabaya River is for raw water source for Surabaya City. Besides, this river is used for domestic and industrial waste discharges, and for irrigation. This study aimed to investigate the distribution of microplastics (MPs/MP) and its characteristics ...
DOI:
10.1016/j.scitotenv.2020.138560

18. Ignition of thin fuel by thermoplastic drips: An experimental study for the dripping ignition theory

Author:
Sun, Peiyi; Lin, Shaorun; Huang, Xinyan
Source:
Fire safety journal 2020 v.115 pp. 103006
ISSN:
0379-7112
Subject:
polyethylene,   etc   ; burning; fire hazard; fires; heat transfer; irradiation; probability; thermoplastics;     Show all 8 Subjects
Abstract:
... Ignition by dripping flame is widely observed in wire fires and façade fires, but little research has quantified its fire hazard. This work studies the ignition of thin papers (0.07–0.32 mm) by burning polyethylene drips with four sizes (2.6–6.2 mg) and dripping frequencies (0.8–1.8 Hz). The probability of dripping ignition as a function of key dripping parameters is quantified to determine the ig ...
DOI:
10.1016/j.firesaf.2020.103006

19. Use of fluorescent probes in supporting functional group analysis resulting from polymer ageing

Author:
Hervé, Baptiste; Rapp, Géraldine; Bussiere, Pierre-Olivier; Gardette, Jean-Luc; Therias, Sandrine
Source:
Polymer degradation and stability 2020 v.177 pp. 109167
ISSN:
0141-3910
Subject:
polyethylene,   etc   ; acetates; alcohols; fluorescent dyes; moieties; oxygen; photooxidation; polyesters; polymethylmethacrylate;     Show all 9 Subjects
Abstract:
... Based on the determination of the solvatochromic parameters of a series of polymers with various functional groups containing oxygen atoms, a method was proposed which allowed for discriminating the oxidation products formed by exposure of polymers to photo- and/or thermo-ageing. The polymers used to determine the solvatochromic parameters contained polar groups such as chain-pendant ester (EVA, P ...
DOI:
10.1016/j.polymdegradstab.2020.109167

20. Biodegradable kinetics and behavior of bio-based polyblends under simulated aerobic composting conditions

Author:
Kalita, Naba Kumar; Bhasney, Siddharth Mohan; Kalamdhad, Ajay; Katiyar, Vimal
Source:
Journal of environmental management 2020 v.261 pp. 110211
ISSN:
0301-4797
Subject:
polyethylene,   etc   ; biodegradability; biodegradation; cellulose; composting; melting; polylactic acid;     Show all 7 Subjects
Abstract:
... The current study evaluates aerobic biodegradation of melt extruded poly(lactic acid) PLA based blends under composting conditions. Samples of neat PLA (NPLA) and bio-based polyblend composites of PLA/LLDPE (linear low-density polyethylene) having different concentration of MCC (microcrystalline cellulose crystal) were analyzed to understand the biodegradation behavior of these blends under simula ...
DOI:
10.1016/j.jenvman.2020.110211