1
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Tian R, Li K, Lin Y, Lu C, Duan X. Characterization Techniques of Polymer Aging: From Beginning to End. Chem Rev 2023; 123:3007-3088. [PMID: 36802560 DOI: 10.1021/acs.chemrev.2c00750] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
Polymers have been widely applied in various fields in the daily routines and the manufacturing. Despite the awareness of the aggressive and inevitable aging for the polymers, it still remains a challenge to choose an appropriate characterization strategy for evaluating the aging behaviors. The difficulties lie in the fact that the polymer features from the different aging stages require different characterization methods. In this review, we present an overview of the characterization strategies preferable for the initial, accelerated, and late stages during polymer aging. The optimum strategies have been discussed to characterize the generation of radicals, variation of functional groups, substantial chain scission, formation of low-molecular products, and deterioration in the polymers' macro-performances. In view of the advantages and the limitations of these characterization techniques, their utilization in a strategic approach is considered. In addition, we highlight the structure-property relationship for the aged polymers and provide available guidance for lifetime prediction. This review could allow the readers to be knowledgeable of the features for the polymers in the different aging stages and provide access to choose the optimum characterization techniques. We believe that this review will attract the communities dedicated to materials science and chemistry.
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Affiliation(s)
- Rui Tian
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Kaitao Li
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yanjun Lin
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
- School of Chemical Engineering, Qinghai University, Xining 810016, China
| | - Chao Lu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Xue Duan
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
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2
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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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3
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Weakly pressure-dependent molecular sieving of propylene/propane mixtures through mixed matrix membrane with ZIF-8 direct-through channels. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.120366] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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4
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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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5
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Irriyanto MZ, Li HS, Choi BS, Myint AA, Kim J. Material stability assessment of R-1234ze(E) as a working fluid for supercritical organic Rankine cycle. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2021.01.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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6
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Effect of hydrophilic polymer modification of reverse osmosis membrane surfaces on organic adsorption and biofouling behavior. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.125680] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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7
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Vásquez‐Rendón M, Romero‐Sáez M, Mena J, Fuenzalida V, Berlanga I, Álvarez‐Láinez ML. Synergistic contribution on flame retardancy by charring production in high‐performance
PEI
/
PBT
/
PTFE
ternary blends: The role of
PTFE. POLYM ADVAN TECHNOL 2020. [DOI: 10.1002/pat.5198] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Mauricio Vásquez‐Rendón
- Grupo Calidad, Metrología y Producción Instituto Tecnológico Metropolitano Medellín Colombia
| | - Manuel Romero‐Sáez
- Grupo Calidad, Metrología y Producción Instituto Tecnológico Metropolitano Medellín Colombia
| | - Jhorman Mena
- Grupo Calidad, Metrología y Producción Instituto Tecnológico Metropolitano Medellín Colombia
| | - Victor Fuenzalida
- Departamento de Física, Facultad de Ciencias Físicas y Matemáticas Universidad de Chile Santiago Chile
| | - Isadora Berlanga
- Departamento de Ingeniería Química, Biotecnología y Materiales, Facultad de Ciencias Físicas y Matemáticas Universidad de Chile Santiago Chile
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8
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Defluorination of Polytetrafluoroethylene Surface by Hydrogen Plasma. Polymers (Basel) 2020; 12:polym12122855. [PMID: 33260483 PMCID: PMC7760809 DOI: 10.3390/polym12122855] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 11/25/2020] [Accepted: 11/27/2020] [Indexed: 11/30/2022] Open
Abstract
Defluorination of polytetrafluoroethylene (PTFE) surface film is a suitable technique for tailoring its surface properties. The influence of discharge parameters on the surface chemistry was investigated systematically using radio-frequency inductively coupled H2 plasma sustained in the E- and H-modes at various powers, pressures and treatment times. The surface finish was probed by X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS). The measurements of water contact angles (WCA) showed increased wettability of the pristine PTFE; however, they did not reveal remarkable modification in the surface chemistry of the samples treated at various discharge parameters. By contrast, the combination of XPS and ToF-SIMS, however, revealed important differences in the surface chemistry between the E- and H-modes. A well-expressed minimum in the fluorine to carbon ratio F/C as low as 0.2 was observed at the treatment time as short as 1 s when plasma was in the H-mode. More gradual surface chemistry was observed when plasma was in the E-mode, and the minimal achievable F/C ratio was about 0.6. The results were explained by the synergistic effects of hydrogen atoms and vacuum ultraviolet radiation.
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9
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Naderizadeh S, Dante S, Picone P, Di Carlo M, Carzino R, Athanassiou A, Bayer IS. Bioresin-based superhydrophobic coatings with reduced bacterial adhesion. J Colloid Interface Sci 2020; 574:20-32. [DOI: 10.1016/j.jcis.2020.04.031] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 04/06/2020] [Accepted: 04/06/2020] [Indexed: 02/08/2023]
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10
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Zhuang X, Patel S, Zhang C, Wang B, Chen Y, Liu H, Dravid VP, Yu J, Hu YY, Huang W, Facchetti A, Marks TJ. Frequency-Agile Low-Temperature Solution-Processed Alumina Dielectrics for Inorganic and Organic Electronics Enhanced by Fluoride Doping. J Am Chem Soc 2020; 142:12440-12452. [PMID: 32539371 DOI: 10.1021/jacs.0c05161] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The frequency-dependent capacitance of low-temperature solution-processed metal oxide (MO) dielectrics typically yields unreliable and unstable thin-film transistor (TFT) performance metrics, which hinders the development of next-generation roll-to-roll MO electronics and obscures intercomparisons between processing methodologies. Here, capacitance values stable over a wide frequency range are achieved in low-temperature combustion-synthesized aluminum oxide (AlOx) dielectric films by fluoride doping. For an optimal F incorporation of ∼3.7 atomic % F, the F:AlOx film capacitance of 166 ± 11 nF/cm2 is stable over a 10-1-104 Hz frequency range, far more stable than that of neat AlOx films (capacitance = 336 ± 201 nF/cm2) which falls from 781 ± 85 nF/cm2 to 104 ± 4 nF/cm2 over this frequency range. Importantly, both n-type/inorganic and p-type/organic TFTs exhibit reliable electrical characteristics with minimum hysteresis when employing the F:AlOx dielectric with ∼3.7 atomic % F. Systematic characterization of film microstructural/compositional and electronic/dielectric properties by X-ray photoelectron spectroscopy, time-of-fight secondary ion mass spectrometry, cross-section transmission electron microscopy, solid-state nuclear magnetic resonance, and UV-vis absorption spectroscopy reveal that fluoride doping generates AlOF, which strongly reduces the mobile hydrogen content, suppressing polarization mechanisms at low frequencies. Thus, this work provides a broadly applicable anion doping strategy for the realization of high-performance solution-processed metal oxide dielectrics for both organic and inorganic electronics applications.
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Affiliation(s)
- Xinming Zhuang
- State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Technology, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, China.,Department of Chemistry and the Materials Research Center, Northwestern University, Evanston, Illinois 60208, United States
| | - Sawankumar Patel
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Chi Zhang
- Department of Materials Science and Engineering, The NUANCE Center, Northwestern University, Evanston, Illinois 60208, United States
| | - Binghao Wang
- Department of Chemistry and the Materials Research Center, Northwestern University, Evanston, Illinois 60208, United States
| | - Yao Chen
- Department of Chemistry and the Materials Research Center, Northwestern University, Evanston, Illinois 60208, United States
| | - Haoyu Liu
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Vinayak P Dravid
- Department of Materials Science and Engineering, The NUANCE Center, Northwestern University, Evanston, Illinois 60208, United States
| | - Junsheng Yu
- State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Technology, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, China
| | - Yan-Yan Hu
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States.,Center of Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, United States
| | - Wei Huang
- Department of Chemistry and the Materials Research Center, Northwestern University, Evanston, Illinois 60208, United States
| | - Antonio Facchetti
- Department of Chemistry and the Materials Research Center, Northwestern University, Evanston, Illinois 60208, United States.,Flexterra Corporation, 8025 Lamon Avenue, Skokie, Illinois 60077, United States
| | - Tobin J Marks
- Department of Chemistry and the Materials Research Center, Northwestern University, Evanston, Illinois 60208, United States
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11
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Mezzi A, Bolli E, Kaciulis S, Mastellone M, Girolami M, Serpente V, Bellucci A, Carducci R, Polini R, Trucchi DM. Work function and negative electron affinity of ultrathin barium fluoride films. SURF INTERFACE ANAL 2020. [DOI: 10.1002/sia.6832] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Alessio Mezzi
- Institute for the Study of Nanostructured Materials ISMN‐CNR Rome Italy
| | - Eleonora Bolli
- Institute for the Study of Nanostructured Materials ISMN‐CNR Rome Italy
- Department of Industrial Engineering University of Rome “Tor Vergata” Rome Italy
| | - Saulius Kaciulis
- Institute for the Study of Nanostructured Materials ISMN‐CNR Rome Italy
| | - Matteo Mastellone
- Institute of Structure of Matter ISM‐CNR Rome Italy
- Department of Basic and Applied Sciences for Engineering University of Rome “La Sapienza” Rome Italy
| | | | | | | | - Riccardo Carducci
- Institute of Structure of Matter ISM‐CNR Rome Italy
- Department of Chemical Science and Technologies University of Rome “Tor Vergata” Rome Italy
| | - Riccardo Polini
- Institute of Structure of Matter ISM‐CNR Rome Italy
- Department of Chemical Science and Technologies University of Rome “Tor Vergata” Rome Italy
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12
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Understanding composition and morphology of solid-electrolyte interphase in mesocarbon microbeads electrodes with nano-conducting additives. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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13
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Samanta A, Huang W, Chaudhry H, Wang Q, Shaw SK, Ding H. Design of Chemical Surface Treatment for Laser-Textured Metal Alloys to Achieve Extreme Wetting Behavior. ACS APPLIED MATERIALS & INTERFACES 2020; 12:18032-18045. [PMID: 32208599 DOI: 10.1021/acsami.9b21438] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Extreme wetting activities of laser-textured metal alloys have received significant interest due to their superior performance in a wide range of commercial applications and fundamental research studies. Fundamentally, extreme wettability of structured metal alloys depends on both the surface structure and surface chemistry. However, compared with the generation of physical topology on the surface, the role of surface chemistry is less explored for the laser texturing processes of metal alloys to tune the wettability. This work introduces a systematic design approach to modify the surface chemistry of laser textured metal alloys to achieve various extreme wettabilities, including superhydrophobicity/superoleophobicity, superhydrophilicity/superoleophilicity, and coexistence of superoleophobicity and superhydrophilicity. Microscale trenches are first created on the aluminum alloy 6061 surfaces by nanosecond pulse laser surface texturing. Subsequently, the textured surface is immersion-treated in several chemical solutions to attach target functional groups on the surface to achieve the final extreme wettability. Anchoring fluorinated groups (-CF2- and -CF3) with very low dispersive and nondispersive surface energy leads to superoleophobicity and superhydrophobicity, resulting in repelling both water and diiodomethane. Attachment of the polar nitrile (-C≡N) group with very high nondispersive and high dispersive surface energy achieves superhydrophilicity and superoleophilicity by drawing water and diiodomethane molecules in the laser-textured capillaries. At last, anchoring fluorinated groups (-CF2- and -CF3) and polar sodium carboxylate (-COONa) together leads to very low dispersive and very high nondispersive surface energy components. It results in the coexistence of superoleophobicity and superhydrophilicity, where the treated surface attracts water but repels diiodomethane.
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Affiliation(s)
- Avik Samanta
- Department of Mechanical Engineering, University of Iowa, Iowa City, Iowa 52242, United States
| | - Wuji Huang
- Department of Mechanical Engineering, University of Iowa, Iowa City, Iowa 52242, United States
| | - Hassan Chaudhry
- Department of Mechanical Engineering, University of Iowa, Iowa City, Iowa 52242, United States
| | - Qinghua Wang
- Department of Mechanical Engineering, University of Iowa, Iowa City, Iowa 52242, United States
| | - Scott K Shaw
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Hongtao Ding
- Department of Mechanical Engineering, University of Iowa, Iowa City, Iowa 52242, United States
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14
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Schroepfer M, Junghans F, Voigt D, Meyer M, Breier A, Schulze-Tanzil G, Prade I. Gas-Phase Fluorination on PLA Improves Cell Adhesion and Spreading. ACS OMEGA 2020; 5:5498-5507. [PMID: 32201842 PMCID: PMC7081643 DOI: 10.1021/acsomega.0c00126] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Accepted: 02/25/2020] [Indexed: 06/10/2023]
Abstract
For the regeneration or creation of functional tissues, biodegradable biomaterials including polylactic acid (PLA) are widely preferred. Modifications of the material surface are quite common to improve cell-material interactions and thereby support the biological outcome. Typical approaches include a wet chemical treatment with mostly hazardous substances or a functionalization with plasma. In the present study, gas-phase fluorination was applied to functionalize the PLA surfaces in a simple and one-step process. The biological response including biocompatibility, cell adhesion, cell spreading, and proliferation was analyzed in cell culture experiments with fibroblasts L929 and correlated with changes in the surface properties. Surface characterization methods including surface energy and isoelectric point measurements, X-ray photoelectron spectroscopy, and atomic force microscopy were applied to identify the effects of fluorination on PLA. Gas-phase fluorination causes the formation of C-F bonds in the PLA backbone, which induce a shift to a more hydrophilic and polar surface. The slightly negatively charged surface dramatically improves cell adhesion and spreading of cells on the PLA even with low fluorine content. The results indicate that this improved biological response is protein- but not integrin-dependent. Gas-phase fluorination is therefore an efficient technique to improve cellular response to biomaterial surfaces without losing cytocompatibility.
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Affiliation(s)
- Michaela Schroepfer
- Research
Institute of Leather and Plastic Sheeting (FILK), Meissner Ring 1-5, 09599 Freiberg, Germany
| | - Frauke Junghans
- Research
Institute of Leather and Plastic Sheeting (FILK), Meissner Ring 1-5, 09599 Freiberg, Germany
| | - Diana Voigt
- Research
Institute of Leather and Plastic Sheeting (FILK), Meissner Ring 1-5, 09599 Freiberg, Germany
| | - Michael Meyer
- Research
Institute of Leather and Plastic Sheeting (FILK), Meissner Ring 1-5, 09599 Freiberg, Germany
| | - Anette Breier
- Leibniz
Institute of Polymer Research Dresden, Hohe Straße 6, 01069 Dresden, Germany
| | - Gundula Schulze-Tanzil
- Institute
of Anatomy and Cell Biology, Paracelsus
Medical University, Nathan
Str. 1, 90419 Nuremberg, Germany
| | - Ina Prade
- Research
Institute of Leather and Plastic Sheeting (FILK), Meissner Ring 1-5, 09599 Freiberg, Germany
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15
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Johnson BI, Avval TG, Wheeler J, Anderson HC, Diwan A, Stowers KJ, Ess DH, Linford MR. Semiempirical Peak Fitting Guided by ab Initio Calculations of X-ray Photoelectron Spectroscopy Narrow Scans of Chemisorbed, Fluorinated Silanes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:1878-1886. [PMID: 32013448 DOI: 10.1021/acs.langmuir.9b03136] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Here, we address the issue of finding correct CF2/CF3 area ratios from X-ray photoelectron spectroscopy (XPS) C 1s narrow scans of materials containing -CH2CH2(CF2)nCF3 (n = 0, 1, 2, ...) moieties. For this work, we modified silicon wafers with four different fluorosilanes. The smallest had a trifluoropropyl (n = 0) moiety, followed by nonafluorohexyl (n = 3), tridecafluoro (n = 5), and finally, heptadecafluoro (n = 7) moieties. Monolayer deposition of the fluorosilanes was confirmed by spectroscopic ellipsometry, wetting, and XPS. Analysis of the trifluoropropyl (n = 0) surface and a sample of polytetrafluoroethylene provided pure-component XPS spectra for -CF3 and -(CF2)n- moieties, respectively. Initial XPS C 1s peak fitting, which follows the literature precedent, was not entirely adequate. To address this issue, six different fitting approaches with increasing complexity and/or input from the Hartree-Fock theory (HF) were considered. Ultimately, we show that by combining HF results with empirical analyses, we obtain more accurate CF2/CF3 area ratios while maintaining high-quality fits.
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Affiliation(s)
- Brian I Johnson
- Department of Chemistry and Biochemistry, Brigham Young University, C100 BNSN, Provo, Utah 84602, United States
| | - Tahereh G Avval
- Department of Chemistry and Biochemistry, Brigham Young University, C100 BNSN, Provo, Utah 84602, United States
| | - Joshua Wheeler
- Department of Chemistry and Biochemistry, Brigham Young University, C100 BNSN, Provo, Utah 84602, United States
| | - Hans C Anderson
- Department of Chemistry and Biochemistry, Brigham Young University, C100 BNSN, Provo, Utah 84602, United States
| | | | - Kara J Stowers
- Department of Chemistry and Biochemistry, Brigham Young University, C100 BNSN, Provo, Utah 84602, United States
| | - Daniel H Ess
- Department of Chemistry and Biochemistry, Brigham Young University, C100 BNSN, Provo, Utah 84602, United States
| | - Matthew R Linford
- Department of Chemistry and Biochemistry, Brigham Young University, C100 BNSN, Provo, Utah 84602, United States
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16
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Baranowska-Korczyc A, Jaworska E, Strawski M, Paterczyk B, Maksymiuk K, Michalska A. A potentiometric sensor based on modified electrospun PVDF nanofibers – towards 2D ion-selective membranes. Analyst 2020; 145:5594-5602. [DOI: 10.1039/d0an00830c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Core–shell modified nanofiber mats were used as ion-selective membranes for the first time.
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Affiliation(s)
| | - Ewa Jaworska
- Faculty of Chemistry
- University of Warsaw
- 02-093 Warsaw
- Poland
| | | | - Bohdan Paterczyk
- Laboratory of Electron and Confocal Microscopy
- Faculty of Biology
- University of Warsaw
- 02-096 Warsaw
- Poland
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17
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Influence of Water on Tribolayer Growth When Lubricating Steel with a Fluorinated Phosphonium Dicyanamide Ionic Liquid. LUBRICANTS 2019. [DOI: 10.3390/lubricants7030027] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This work aims to elucidate the role of environmental humidity on the tribological behavior of steel surfaces lubricated with an ionic liquid comprised of a fluorinated phosphonium cation—tributyl-3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluoro-octyl-phosphonium—and a dicyanamide anion (i.e. N(CN)2−). Ball-on-disk tribotests were carried out at room temperature and at various levels of relative humidity (RH). Water was found to be required to promote the formation of a tribofilm over the contact area. The reaction layer exhibited a patchy morphology, which resembles that observed formed with conventional antiwear additives such as ZnDTP. A surface-chemical analysis of the tribofilm indicated that the tribofilm is composed of fluorides, oxides, and phosphates, pointing to a stress-induced degradation of the ions and corrosion of the sliding counterparts, which is enabled by the presence of water at the sliding interface.
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18
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Tsen WC, Lee CF, Su YR, Gu JH, Suen MC. Effect of novel aliphatic fluoro-diol content on synthesis and properties of waterborne polyurethanes. J Appl Polym Sci 2019. [DOI: 10.1002/app.47356] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Wen-Chin Tsen
- Department of Fashion and Design; LEE-MING Institute of Technology; Taipei Taiwan, Republic of China
| | - Chia-Fan Lee
- Department of Fashion Business Management; LEE-MING Institute of Technology; Taipei Taiwan, Republic of China
| | - Yu-Ru Su
- Chun Kang Technology Co., Ltd.; Taoyuan, 32466 Taiwan, Republic of China
| | - Jia-Hao Gu
- Department of Materials Science and Engineering; National Taiwan University of Science and Technology; Taipei, 106 Taiwan, Republic of China
| | - Maw-Cherng Suen
- Department of Fashion Business Management; LEE-MING Institute of Technology; Taipei Taiwan, Republic of China
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19
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Tokranov AK, Nishizawa N, Amadei CA, Zenobio JE, Pickard HM, Allen JG, Vecitis CD, Sunderland EM. How Do We Measure Poly- and Perfluoroalkyl Substances (PFASs) at the Surface of Consumer Products?: Environmental Science and Technology LETTERS. ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS 2019; 6:38-43. [PMID: 33283017 PMCID: PMC7713715 DOI: 10.1021/acs.estlett.8b00600] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Exposures to poly- and perfluoroalkyl substances (PFASs) have been linked to metabolic disruption, immunotoxicity and cancer in humans. PFASs are known to be present in diverse consumer products including textiles and food packaging. Here we present a new method for quantifying the atomic percent fluorine (% F) in the surficial 0.01 μm of consumer products using X-ray photoelectron spectroscopy (XPS). The surface of food contact materials and textiles measured in this study contained up to 28% F and 45% F, respectively. PTFE tape was measured to demonstrate XPS accuracy and precision. Depth profiles of fluorine content in consumer products measured using XPS showed highest levels at the upper-most surface in contact with the surrounding environment and a decrease below the surface. PFASs released in methanol extracts and quantified using traditional liquid chromatography-tandem mass spectrometry typically accounted for <1% of the fluorine measured with XPS in consumer products. We conclude that XPS is a useful technique for characterizing PFASs in consumer products because it can precisely quantify the surficial fluorine content of materials. XPS also allows identification of CF2 and CF3 groups in materials and can elucidate the depth dependent distribution of fluorine in products.
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Affiliation(s)
- Andrea K. Tokranov
- Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, MA 02138
- Andrea K. Tokranov 29 Oxford Street, Room 116, Cambridge, MA 02138,
| | - Nicole Nishizawa
- Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, MA 02138
| | - Carlo Alberto Amadei
- Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, MA 02138
| | - Jenny E. Zenobio
- Department of Agronomy, Interdisciplinary Ecological Science and Engineering, Purdue University, West Lafayette, IN 47907-2054
| | - Heidi M. Pickard
- Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, MA 02138
| | - Joseph G. Allen
- Department of Environmental Health, Harvard T. H. Chan School of Public Health, Harvard University, Boston, MA 02115
| | - Chad D. Vecitis
- Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, MA 02138
| | - Elsie M. Sunderland
- Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, MA 02138
- Department of Environmental Health, Harvard T. H. Chan School of Public Health, Harvard University, Boston, MA 02115
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20
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Su SK, Gu JH, Lee HT, Wu CL, Su YR, Suen MC. Biodegradable polyurethanes: novel effects of the fluorine-containing chain extender on the thermal, physical and water vapor permeation properties. JOURNAL OF POLYMER RESEARCH 2018. [DOI: 10.1007/s10965-018-1607-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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21
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Kim B, Weaver A, Chumakov M, Pazos IM, Poster DL, Gaskell K, Han DH, Scherer G, Yandrasits MA, Cheol Lee B, Al-Sheikhly M. Mechanisms and Characterization of the Pulsed Electron-Induced Grafting of Styrene onto Poly(tetrafluoroethylene-co-hexafluoropropylene) to Prepare a Polymer Electrolyte Membrane. Radiat Res 2018; 190:309-321. [PMID: 29912620 PMCID: PMC6241253 DOI: 10.1667/rr15006.1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
During the pulsed-electron beam direct grafting of neat styrene onto poly(tetrafluoroethylene-co-hexafluoropropylene) (FEP) substrate, the radiolytically-produced styryl and carbon-centered FEP radicals undergo various desired and undesired competing reactions. In this study, a high-dose rate is used to impede the undesired free radical homopolymerization of styrene and ensure uniform covalent grafting through 125-μm FEP films. This outweighs the enhancement of the undesired crosslinking reactions of carbon-centered FEP radicals and the dimerization of the styryl radicals. The degree of uniform grafting through 125-μm FEP films increases from ≈8%, immediately after pulsed electron irradiation to 33% with the subsequent thermal treatment exceeding the glass transition temperature of FEP of 39°C. On the contrary, steady-state radiolysis using 60Co gamma radiolysis, shows that the undesired homopolymerization of the styrene has become the predominant reaction with a negligible degree of grafting. Time-resolved fast kinetic measurements on pulsed neat styrene show that the styryl radicals undergo fast decays via propagation homopolymerization and termination reactions at an observed reaction rate constant of 5 × 108 l · mol-1 · s-1. The proton conductivity of 25-μm film at 80°C is 0.29 ± 0.01 s cm-1 and 0.007 s cm-1 at relative humidity of 92% and 28%, respectively. The aims of this work are: 1. electrolyte membranes are prepared via grafting initiated by a pulsed electron beam; 2. postirradiation heat-treated membranes are uniformly grafted, ideal for industry; 3. High dose rate is the primary parameter to promote the desired reactions; 4. measurement of kinetics of undesired radiation-induced styrene homopolymerization; and 5. The conductivity of prepared membranes is on par or higher than industry standards.
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Affiliation(s)
- Byungnam Kim
- Departments of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742-2115
- Korea Atomic Energy Research Institute, Daejeon, 305353, Republic of Korea
| | - Alia Weaver
- Departments of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742-2115
| | - Marina Chumakov
- Departments of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742-2115
| | - Ileana M. Pazos
- Departments of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742-2115
| | - Dianne L. Poster
- National Institute of Standards and Technology, Gaithersburg, Maryland 20899
| | - Karen Gaskell
- Departments of Chemistry, University of Maryland, College Park, Maryland 20742-2115
| | - Do Hung Han
- School of Chemical Engineering and Technology, Yeungnam University, Gyeongsangbuk-do, Republic of Korea
| | - Günther Scherer
- Electrochemistry Laboratory, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
| | | | - Byung Cheol Lee
- Korea Atomic Energy Research Institute, Daejeon, 305353, Republic of Korea
| | - Mohamad Al-Sheikhly
- Departments of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742-2115
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22
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Lara GG, Andrade GF, Cipreste MF, da Silva WM, Gastelois PL, Gomes DA, de Miranda MC, de Almeida Macedo WA, Neves MJ, de Sousa EMB. Protection of normal cells from irradiation bystander effects by silica-flufenamic acid nanoparticles. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2018; 29:130. [PMID: 30074096 DOI: 10.1007/s10856-018-6134-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Accepted: 07/17/2018] [Indexed: 06/08/2023]
Abstract
The development of a myriad of nanoparticles types has opened new possibilities for the diagnostics and treatment of many diseases, especially for cancer. However, most of the researches done so far do not focus on the protection of normal cells surrounding a tumor from irradiation bystander effects that might lead to cancer recurrence. Gap-junctions are known to be involved in this process, which leads to genomic instability of neighboring normal cells, and flufenamic acid (FFA) is included in a new group of gap-junction blockers recently discovered. The present work explores the use of mesoporous silica nanoparticles MCM-41 functionalized with 3-Aminopropyltriethoxysilane (APTES) for anchoring the flufenamic acid for its prolonged and controlled release and protection from radiation bystander effects. MCM-41 and functionalized samples were structurally and chemically characterized with multiple techniques. The biocompatibility of all samples was tested in a live/dead assay performed in cultured MRC-5 and HeLa cells. HeLa cells cultured were exposed to 50 Gy of gamma-rays and the media transferred to fibroblast cells cultured separately. Our results show that MCM-41 and functionalized samples have high biocompatibility with MCR-5 and HeLa cells, and most importantly, the FFA delivered by these NPs was able to halt apoptosis, one of main bystander effects.
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Affiliation(s)
- Giovanna Gomes Lara
- Centro de Desenvolvimento da Tecnologia Nuclear, CDTN, Belo Horizonte, 31270-901, MG, Brazil
| | | | | | | | - Pedro Lana Gastelois
- Centro de Desenvolvimento da Tecnologia Nuclear, CDTN, Belo Horizonte, 31270-901, MG, Brazil
| | - Dawidson Assis Gomes
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, UFMG, Belo Horizonte, Brazil
| | | | | | - Maria Jose Neves
- Centro de Desenvolvimento da Tecnologia Nuclear, CDTN, Belo Horizonte, 31270-901, MG, Brazil
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23
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Enhancement on the Surface Hydrophobicity and Oleophobicity of an Organosilicon Film by Conformity Deposition and Surface Fluorination Etching. MATERIALS 2018; 11:ma11071089. [PMID: 29949898 PMCID: PMC6073231 DOI: 10.3390/ma11071089] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 06/24/2018] [Accepted: 06/25/2018] [Indexed: 11/17/2022]
Abstract
In this work, the surface morphology of a hydrophobic organosilicon film was modified as it was deposited onto a silver seed layer with nanoparticles. The surface hydrophobicity evaluated by the water contact angle was significantly increased from 100° to 128° originating from the surface of the organosilicon film becoming roughened, and was deeply relevant to the Ag seed layer conform deposition. In addition, the organosilicon film became surface oleophobic and the surface hydrophobicity was improved due to the formation of the inactive C-F chemical on the surface after the carbon tetrafluoride glow discharge etching. The surface hydrophobicity and oleophobicity of the organosilicon film could be further optimized with water and oleic contact angles of about 138° and 61°, respectively, after an adequate fluorination etching.
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24
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Surface properties and corrosion resistance of SF6
plasma-treated polyester-based thermoplastic elastomer. SURF INTERFACE ANAL 2017. [DOI: 10.1002/sia.6323] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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25
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Xia L, Tang B, Yao L, Wang K, Cheris A, Pan Y, Lee S, Xia Y, Chen GZ, Liu Z. Oxidation Decomposition Mechanism of Fluoroethylene Carbonate-Based Electrolytes for High-Voltage Lithium Ion Batteries: A DFT Calculation and Experimental Study. ChemistrySelect 2017. [DOI: 10.1002/slct.201700938] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Lan Xia
- Ningbo Institute of Materials Technology & Engineering (NIMTE); Chinese Academy of Sciences (CAS); Ningbo, Zhejiang 315201 P. R. China
- Department of Chemical and Environmental Engineering, and Centre for Sustainable Energy Technologies; Faculty of Science and Engineering; University of Nottingham Ningbo China; Ningbo, Zhejiang 315100 P. R. China
| | - Bencan Tang
- Department of Chemical and Environmental Engineering, and Centre for Sustainable Energy Technologies; Faculty of Science and Engineering; University of Nottingham Ningbo China; Ningbo, Zhejiang 315100 P. R. China
| | - Linbin Yao
- Department of Chemical and Environmental Engineering, and Centre for Sustainable Energy Technologies; Faculty of Science and Engineering; University of Nottingham Ningbo China; Ningbo, Zhejiang 315100 P. R. China
| | - Kai Wang
- Department of Chemical and Environmental Engineering, and Centre for Sustainable Energy Technologies; Faculty of Science and Engineering; University of Nottingham Ningbo China; Ningbo, Zhejiang 315100 P. R. China
| | - Anastasia Cheris
- Department of Chemical and Environmental Engineering, and Centre for Sustainable Energy Technologies; Faculty of Science and Engineering; University of Nottingham Ningbo China; Ningbo, Zhejiang 315100 P. R. China
| | - Yueyang Pan
- Department of Chemical and Environmental Engineering, and Centre for Sustainable Energy Technologies; Faculty of Science and Engineering; University of Nottingham Ningbo China; Ningbo, Zhejiang 315100 P. R. China
| | - Saixi Lee
- Ningbo Institute of Materials Technology & Engineering (NIMTE); Chinese Academy of Sciences (CAS); Ningbo, Zhejiang 315201 P. R. China
| | - Yonggao Xia
- Ningbo Institute of Materials Technology & Engineering (NIMTE); Chinese Academy of Sciences (CAS); Ningbo, Zhejiang 315201 P. R. China
| | - George Z. Chen
- Department of Chemical and Environmental Engineering, and Centre for Sustainable Energy Technologies; Faculty of Science and Engineering; University of Nottingham Ningbo China; Ningbo, Zhejiang 315100 P. R. China
| | - Zhaoping Liu
- Ningbo Institute of Materials Technology & Engineering (NIMTE); Chinese Academy of Sciences (CAS); Ningbo, Zhejiang 315201 P. R. China
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26
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Su SK, Gu JH, Lee HT, Wu CL, Hwang JJ, Suen MC. Synthesis and properties of novel biodegradable polyurethanes containing fluorinated aliphatic side chains. JOURNAL OF POLYMER RESEARCH 2017. [DOI: 10.1007/s10965-017-1301-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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27
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Su SK, Gu JH, Lee HT, Yu SH, Wu CL, Suen MC. Effects of an Aromatic Fluoro-Diol and Polycaprolactone on the Properties of the Resultant Polyurethanes. ADVANCES IN POLYMER TECHNOLOGY 2016. [DOI: 10.1002/adv.21773] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Shuenn-Kung Su
- Department of Materials Science and Engineering; National Taiwan University of Science and Technology; Taipei 10607 Taiwan
| | - Jia-Hao Gu
- Department of Materials Science and Engineering; National Taiwan University of Science and Technology; Taipei 10607 Taiwan
| | - Hsun-Tsing Lee
- Department of Materials Science and Engineering; Vanung University; Jongli Taoyuan 32061 Taiwan
| | - Shu-Huei Yu
- Department of Materials Science and Engineering; Vanung University; Jongli Taoyuan 32061 Taiwan
| | - Cheng-Lung Wu
- Department of Materials Science and Engineering; National Taiwan University of Science and Technology; Taipei 10607 Taiwan
| | - Maw-Cherng Suen
- Department of Creative Fashion Design; Taoyuan Innovation Institute of Technology; Jongli Taoyuan 32091 Taiwan
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28
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Wang Z, Zuilhof H. Antifouling Properties of Fluoropolymer Brushes toward Organic Polymers: The Influence of Composition, Thickness, Brush Architecture, and Annealing. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:6571-6581. [PMID: 27332543 DOI: 10.1021/acs.langmuir.6b00695] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Fluoropolymer brushes are widely used to prevent nonspecific adsorption of commercial polymeric or biological materials due to their strongly hydrophobic character. Herein, a series of fluoropolymer brushes with different compositions, thicknesses and molecular architectures was prepared via surface-initiated atom transfer radical polymerization (ATRP). Subsequently, the antifouling properties of these fluoropolymer brushes against organic polymers were studied in detail using X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) measurements and polystyrene as a representative fouling polymer. Among all of the molecular architectures studied, homopolymerized methacrylate-based fluoropolymer brushes (PMAF17) show the best antifouling properties. Annealing the fluoropolymer brushes improves the antifouling property dramatically due to the reregulated surface composition. These fluoropolymer brushes can be combined with, e.g., micro- and nanostructuring and other advanced materials properties to yield even better long-term antifouling behavior under harsh environments.
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Affiliation(s)
- Zhanhua Wang
- Material innovation institute (M2i) , Mekelweg 2, P.O. Box 5008, 2600 GA Delft, The Netherlands
- Laboratory of Organic Chemistry, Wageningen University , Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Han Zuilhof
- Laboratory of Organic Chemistry, Wageningen University , Stippeneng 4, 6708 WE Wageningen, The Netherlands
- Department of Chemical and Materials Engineering, King Abdulaziz University , Jeddah, Saudi Arabia
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29
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Wang Z, Zuilhof H. Self-Healing Superhydrophobic Fluoropolymer Brushes as Highly Protein-Repellent Coatings. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:6310-8. [PMID: 27305351 DOI: 10.1021/acs.langmuir.6b01318] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Superhydrophobic surfaces with micro/nanostructures are widely used to prevent nonspecific adsorption of commercial polymeric and/or biological materials. Herein, a self-healing superhydrophobic and highly protein-repellent fluoropolymer brush was grafted onto nanostructured silicon by surface-initiated atom transfer radical polymerization (ATRP). Both the superhydrophobicity and antifouling properties (as indicated for isolated protein solutions and for 10% blood plasma) are well repaired upon serious chemical degradation (by e.g. air plasma). This brush still maintains excellent superhydrophobicity and good antifouling properties even after 5 damage-repair cycles, which opens a new door to fabricate long-term antifouling coatings on various substrates that can be used in harsh environments.
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Affiliation(s)
- Zhanhua Wang
- Materials innovation institute (M2i) , Elektronicaweg 25, P.O. Box 5008, 2600 GA, Delft, The Netherlands
- Laboratory of Organic Chemistry, Wageningen University , Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Han Zuilhof
- Laboratory of Organic Chemistry, Wageningen University , Stippeneng 4, 6708 WE Wageningen, The Netherlands
- School of Pharmaceutical Science and Technology, Tianjin University , 92 Weijin Road, Nankai District, Tianjin, P.R. China
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30
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Recek N, Primc G, Vesel A, Mozetic M, Avila J, Razado-Colambo I, Asensio MC. Degradation of Albumin on Plasma-Treated Polystyrene by Soft X-ray Exposure. Polymers (Basel) 2016; 8:polym8070244. [PMID: 30974519 PMCID: PMC6431894 DOI: 10.3390/polym8070244] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 06/11/2016] [Accepted: 06/21/2016] [Indexed: 11/29/2022] Open
Abstract
Thin films of human serum albumin (HSA) were immobilized on polystyrene (PS) substrates previously functionalized either with polar or nonpolar functional groups. The functionalization was performed by treatment with cold gaseous plasma created in pure oxygen and tetrafluoromethane (CF4) plasmas, respectively. Samples were examined with soft X-rays in the photon energy range of 520 to 710 eV in the ANTARES beam line at SOLEIL Synchrotron. NEXAFS spectra of O K-edge and F K-edge were collected at different spots of the sample, and measurements at each spot were repeated many times. A strong degradation of the HSA protein was observed. The weakly irradiated samples exhibited strong absorption at 531.5 eV associated with the O 1s→π*amide transitions, and a broad non distinctive peak at 540 eV was attributed to the O 1s→σ*C–O transitions. Both peaks decreased with increasing irradiation time until they were completely replaced by a broad non-distinctive peak at around 532 eV, indicating the destruction of the original protein conformation. The shortage of the amide groups indicated breakage of the peptide bonds.
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Affiliation(s)
- Nina Recek
- Jozef Stefan Institute, Jamova cesta 39, Ljubljana 1000, Slovenia.
| | - Gregor Primc
- Jozef Stefan Institute, Jamova cesta 39, Ljubljana 1000, Slovenia.
| | - Alenka Vesel
- Jozef Stefan Institute, Jamova cesta 39, Ljubljana 1000, Slovenia.
| | - Miran Mozetic
- Jozef Stefan Institute, Jamova cesta 39, Ljubljana 1000, Slovenia.
| | - José Avila
- Synchrotron-SOLEIL & Université Paris-Saclay, Saint-Aubin, BP48, Gif sur Yvette Cedex F91192, France.
| | - Ivy Razado-Colambo
- Synchrotron-SOLEIL & Université Paris-Saclay, Saint-Aubin, BP48, Gif sur Yvette Cedex F91192, France.
| | - Maria C Asensio
- Synchrotron-SOLEIL & Université Paris-Saclay, Saint-Aubin, BP48, Gif sur Yvette Cedex F91192, France.
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31
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In situ generation of TiO2 nanoparticles using chitosan as a template and their photocatalytic activity. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2016.02.008] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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32
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Wu CL, Chiu SH, Lee HT, Suen MC. Synthesis and properties of biodegradable polycaprolactone/polyurethanes using fluoro chain extenders. POLYM ADVAN TECHNOL 2015. [DOI: 10.1002/pat.3737] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Cheng-Lung Wu
- Department of Materials Science and Engineering; National Taiwan University of Science and Technology; Taipei 10607, R. O. C. Taiwan
| | - Shih-Hsuan Chiu
- Department of Materials Science and Engineering; National Taiwan University of Science and Technology; Taipei 10607, R. O. C. Taiwan
| | - Hsun-Tsing Lee
- Department of Materials Science and Engineering; Vanung University; Jongli Taoyuan 32061 R.O.C. Taiwan
| | - Maw-Cherng Suen
- Department of Creative Fashion Design; Taoyuan Innovation Institute of Technology; Jongli Taoyuan 32091, R. O. C. Taiwan
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33
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Thermal and UV Hydrosilylation of Alcohol-Based Bifunctional Alkynes on Si (111) surfaces: How surface radicals influence surface bond formation. Sci Rep 2015; 5:11299. [PMID: 26067470 PMCID: PMC4650888 DOI: 10.1038/srep11299] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Accepted: 05/14/2015] [Indexed: 11/18/2022] Open
Abstract
Using two different hydrosilylation methods, low temperature thermal and UV initiation, silicon (111) hydrogenated surfaces were functionalized in presence of an OH-terminated alkyne, a CF3-terminated alkyne and a mixed equimolar ratio of the two alkynes. XPS studies revealed that in the absence of premeditated surface radical through low temperature hydrosilylation, the surface grafting proceeded to form a Si-O-C linkage via nucleophilic reaction through the OH group of the alkyne. This led to a small increase in surface roughness as well as an increase in hydrophobicity and this effect was attributed to the surficial etching of silicon to form nanosize pores (~1–3 nm) by residual water/oxygen as a result of changes to surface polarity from the grafting. Furthermore in the radical-free thermal environment, a mix in equimolar of these two short alkynes can achieve a high contact angle of ~102°, comparable to long alkyl chains grafting reported in literature although surface roughness was relatively mild (rms = ~1 nm). On the other hand, UV initiation on silicon totally reversed the chemical linkages to predominantly Si-C without further compromising the surface roughness, highlighting the importance of surface radicals determining the reactivity of the silicon surface to the selected alkynes.
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34
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Yang ZZ, Yu B, Zhang H, Zhao Y, Ji G, Liu Z. Fluoro-functionalized polymeric N-heterocyclic carbene-zinc complexes: efficient catalyst for formylation and methylation of amines with CO2 as a C1-building block. RSC Adv 2015. [DOI: 10.1039/c5ra00380f] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A heterogeneous fluoro-functionalized polymeric N-heterocyclic carbene-zinc complex (F-PNHC-Zn) was designed and prepared for the formylation and methylation of N-methylanilines using CO2 as a C1 building block in the presence of organosilane.
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Affiliation(s)
- Zhen-Zhen Yang
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid
- Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Bo Yu
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid
- Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Hongye Zhang
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid
- Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Yanfei Zhao
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid
- Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Guipeng Ji
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid
- Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Zhimin Liu
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid
- Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
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35
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Kinetics of radiation-induced degradation of CF2- and CF-groups in poly(vinylidene fluoride): Model refinement. Polym Degrad Stab 2014. [DOI: 10.1016/j.polymdegradstab.2014.09.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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36
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Markevich E, Salitra G, Fridman K, Sharabi R, Gershinsky G, Garsuch A, Semrau G, Schmidt MA, Aurbach D. Fluoroethylene carbonate as an important component in electrolyte solutions for high-voltage lithium batteries: role of surface chemistry on the cathode. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:7414-24. [PMID: 24885475 DOI: 10.1021/la501368y] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
The effect of fluorinated ethylene carbonate (FEC) as a cosolvent in alkyl carbonates/LiPF6 on the cycling performance of high-voltage (5 V) cathodes for Li-ion batteries was investigated using electrochemical tools, X-ray photoelectron spectroscopy (XPS), and high-resolution scanning electron microscopy (HRSEM). An excellent cycling stability of LiCoPO4/Li, LiNi0.5Mn1.5O4/Si, and LiCoPO4/Si cells and a reasonable cycling of LiCoPO4/Si cells was achieved by replacing the commonly used cosolvent ethylene carbonate (EC) by FEC in electrolyte solutions for high-voltage Li-ion batteries. The roles of FEC in the improvement of the cycling performance of high-voltage Li-ion cells and of surface chemistry on the cathode are discussed.
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Affiliation(s)
- Elena Markevich
- Department of Chemistry Bar-Ilan University , Ramat Gan 52900 Israel
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37
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Das SK, Mukherjee S, Lopes LMF, Ilharco LM, Ferraria AM, Botelho do Rego AM, Pombeiro AJL. Synthesis, characterization and heterogeneous catalytic application of copper integrated mesoporous matrices. Dalton Trans 2014; 43:3215-26. [DOI: 10.1039/c3dt52510d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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38
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Gupta V, Tuscano JA, Romriell NR, Davis RC, Linford MR. Data and device protection: A ToF-SIMS, wetting, and XPS study of an Apple iPod nano. SURF INTERFACE ANAL 2013. [DOI: 10.1002/sia.5352] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Vipul Gupta
- Department of Chemistry and Biochemistry; Brigham Young University; Provo UT 84602 USA
| | - Joshua A. Tuscano
- Department of Chemistry and Biochemistry; Brigham Young University; Provo UT 84602 USA
| | - Naomi R. Romriell
- Department of Chemistry and Biochemistry; Brigham Young University; Provo UT 84602 USA
| | - Robert C. Davis
- Department of Physics and Astronomy; Brigham Young University; Provo UT 84602 USA
| | - Matthew R. Linford
- Department of Chemistry and Biochemistry; Brigham Young University; Provo UT 84602 USA
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39
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Grayfer ED, Makotchenko VG, Kibis LS, Boronin AI, Pazhetnov EM, Zaikovskii VI, Fedorov VE. Synthesis, Properties, and Dispersion of Few-Layer Graphene Fluoride. Chem Asian J 2013; 8:2015-22. [DOI: 10.1002/asia.201300401] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Indexed: 11/06/2022]
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40
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41
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Terriza A, Álvarez R, Borrás A, Cotrino J, Yubero F, González-Elipe AR. Roughness assessment and wetting behavior of fluorocarbon surfaces. J Colloid Interface Sci 2012; 376:274-82. [DOI: 10.1016/j.jcis.2012.03.010] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Revised: 02/15/2012] [Accepted: 03/04/2012] [Indexed: 11/26/2022]
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Ford K, Battersby BJ, Wood BJ, Gentle IR. The production and verification of pristine semi-fluorinated thiol monolayers on gold. J Colloid Interface Sci 2012; 370:162-9. [DOI: 10.1016/j.jcis.2011.10.081] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2011] [Revised: 10/21/2011] [Accepted: 10/24/2011] [Indexed: 10/14/2022]
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Boufi S, Ferraria AM, do Rego AMB, Battaglini N, Herbst F, Vilar MR. Surface functionalisation of cellulose with noble metals nanoparticles through a selective nucleation. Carbohydr Polym 2011. [DOI: 10.1016/j.carbpol.2011.06.067] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Carvalho MFNN, Duarte MT, Fernandes TA, Galvão AM, Botelho do Rego AM. Pathway from Chain to Dimer in Cu(I) Camphor Hydrazone Complexes. Inorg Chem 2010; 49:10330-7. [DOI: 10.1021/ic101075g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. Fernanda N. N. Carvalho
- CQE, Complexo I, Instituto Superior Técnico, Technical University of Lisbon, Av. Rovisco Pais 1049-001 Lisboa, Portugal
| | - M. Teresa Duarte
- CQE, Complexo I, Instituto Superior Técnico, Technical University of Lisbon, Av. Rovisco Pais 1049-001 Lisboa, Portugal
| | - Tiago A. Fernandes
- CQE, Complexo I, Instituto Superior Técnico, Technical University of Lisbon, Av. Rovisco Pais 1049-001 Lisboa, Portugal
| | - Adelino M. Galvão
- CQE, Complexo I, Instituto Superior Técnico, Technical University of Lisbon, Av. Rovisco Pais 1049-001 Lisboa, Portugal
| | - Ana M. Botelho do Rego
- Centro de Química-Física Molecular (CQFM) and Institute of Nanoscience and Nanotechnology (IN), Complexo Interdisciplinar, Instituto Superior Técnico, Technical University of Lisbon, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
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Morales ME, Ruiz MA, Oliva I, Oliva M, Gallardo V. Chemical characterization with XPS of the surface of polymer microparticles loaded with morphine. Int J Pharm 2007; 333:162-6. [PMID: 17074455 DOI: 10.1016/j.ijpharm.2006.09.051] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2005] [Revised: 09/27/2006] [Accepted: 09/30/2006] [Indexed: 11/28/2022]
Abstract
Hydrophilic matrices are a potentially useful option for the development of oral controlled-release formulations. The porous surface of these particles makes it possible to control or modify release of the active principle after administration. As a result, such formulations can be used in liquid controlled-release pharmaceutical formulations. We investigated a method of spontaneous drug encapsulation to prepare ethylcellulose polymer microparticles (since the polymer is synthetic rather than natural the final suspension is called pseudolatex) filled with morphine hydrochloride. Morphine is incorporated to water during the synthesis process and thus it is microencapsulated inside the micelles that give rise to the final microparticles. X-ray photoelectron spectroscopy (XPS), a technique that can identify elements in a sample without destroying it, was used for the chemical analysis of the surface of these microspheres. The results demonstrated the complete absence of morphine from the microsphere surface, which was taken as evidence that the drug had been completely encapsulated.
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Affiliation(s)
- M E Morales
- Department of Pharmacy and Pharmaceutical Technology, School of Pharmacy, University of Granada, 18071 Granada, Spain
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Chebotaryov S, Baitinger E, Volegov A, Margamov I, Gribov I, Moskvina N, Kuznetsov V, Evsyukov S, Pesin L. Radiative defluorination of poly (vinylidene fluoride) under soft X-ray radiation. Radiat Phys Chem Oxf Engl 1993 2006. [DOI: 10.1016/j.radphyschem.2005.12.051] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Al-Bataineh SA, Britcher LG, Griesser HJ. Rapid radiation degradation in the XPS analysis of antibacterial coatings of brominated furanones. SURF INTERFACE ANAL 2006. [DOI: 10.1002/sia.2387] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Ménard M, Paynter RW. Fick's law of diffusion depth profiles applied to the degradation of oxidized polystyrene during ARXPS analysis. SURF INTERFACE ANAL 2005. [DOI: 10.1002/sia.2036] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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