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Mengesha DN, Kim H. Electronic structure modulation of multi-walled carbon nanotubes using azo dye for inducing non-radical reaction: Effect of graphitic nitrogen and structural defect. CHEMOSPHERE 2022; 307:136023. [PMID: 35973492 DOI: 10.1016/j.chemosphere.2022.136023] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 07/27/2022] [Accepted: 08/08/2022] [Indexed: 06/15/2023]
Abstract
Multiwalled carbon nanotube (MWCNT) have a great potential for advanced oxidation process as a metal free catalyst. However, there catalytic activity is very low and needs to be appropriately tuned. Herein, we demonstrate a novel synthesis method for tuning the defect and surface functionality of MWCNT using azo dyes and the catalytic performance was tested for the degradation of different organic contaminates using PMS as an oxidant. The content, type of heteroatom functional groups, and the defect parameters were optimized by varying the pH and concentration of the organic dye. The quenching effect showed that singlet oxygen (1O2) is the primary reactive species generated by graphitic nitrogen, which can be boosted by the degree of graphitic structure disruption in MWCNT. The Linear sweep voltammetry (LSV) also confirmed that extrinsic doping enhanced the non-radical degradation by increasing the direct charge transfer rate from MB to PMS. Moreover, the designed catalyst showed a fast degradation performance with 35.1 kJ/mol activation energy and achieved the highest dye degradation rate and even surpassed some state-of-the-art metal-based and metal-free catalysts. The effect of inorganic anions study has also confirmed its industrial applicability.
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Affiliation(s)
- Daniel N Mengesha
- Department of Energy Science and Technology, Environmental Waste Recycle Institute, Myongji University, Yongin, Gyeonggi-do 17058, Republic of Korea
| | - Hern Kim
- Department of Energy Science and Technology, Environmental Waste Recycle Institute, Myongji University, Yongin, Gyeonggi-do 17058, Republic of Korea.
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Chen X, Salem HA, Zonoz R. CO2 SOLUBILITY AND DIFFUSIVITY AND RAPID GAS DECOMPRESSION RESISTANCE OF ELASTOMERS CONTAINING CNT. RUBBER CHEMISTRY AND TECHNOLOGY 2017. [DOI: 10.5254/rct.17.83726] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
ABSTRACT
Understanding the structure–property relationship of elastomers is of critical importance in developing next-generation elastomers for high-pressure, high-temperature (HPHT) applications and in extending the application temperature and pressure range of existing oilfield products. Gas dissolution and diffusion in elastomers are essential to understanding the relationship among elastomer structures, rapid gas decompression (RGD) resistance, and sealing performance. Solubility and diffusivity (or diffusion efficiency) of carbon dioxide (CO2) in hydrogenated nitrile butadiene rubber (HNBR) and fluoroelastomers (FKM) comprising carbon nanotubes (CNT) were measured using a gravimetric method. The Rubotherm method was also used to estimate the solubility and swelling of HNBR in both subcritical liquid and supercritical CO2. It was demonstrated that CNT had a direct impact on CO2 solubility, diffusion, and mechanical properties of elastomers, hence improving the RGD resistance of the elastomers.
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Affiliation(s)
- Xuming Chen
- Cameron, A Schlumberger Company, Houston, TX 77401
| | | | - Ray Zonoz
- Cameron, A Schlumberger Company, Houston, TX 77401
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Chubarova EV, Lebedeva MF, Melenevskaya EY, Shamanin VV. Destructive changes of polymer matrices during preparation, storage, and mechanical testing of neat and C 60-filled polystyrene films. J Appl Polym Sci 2017. [DOI: 10.1002/app.44520] [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)
- Elena V. Chubarova
- Russian Academy of Sciences, Institute of Macromolecular Compounds; Laboratory of Polymerization Mechanisms and Polymer Synthesis; 199004 Bolshoi pr. 31 St.-Petersburg Russia
| | - Marina F. Lebedeva
- Russian Academy of Sciences, Institute of Macromolecular Compounds; Laboratory of Mechanics of Polymers and Composites; 199004 Bolshoi pr. 31 St.-Petersburg Russia
| | - Elena Yu. Melenevskaya
- Russian Academy of Sciences, Institute of Macromolecular Compounds; Laboratory of Polymerization Mechanisms and Polymer Synthesis; 199004 Bolshoi pr. 31 St.-Petersburg Russia
| | - Valerii V. Shamanin
- Russian Academy of Sciences, Institute of Macromolecular Compounds; Laboratory of Polymerization Mechanisms and Polymer Synthesis; 199004 Bolshoi pr. 31 St.-Petersburg Russia
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Ma H, Chu B, Hsiao BS. Modification of carbon nanotubes with fluorinated ionic liquid for improving processability of fluoro-ethylene-propylene. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.01.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Mamun MAA, Soutome Y, Meng Q, Fujimori A. Flexible transparent fluorinated nanohybrid with innovative heat-resistance property-new technology proposal for fabrication of transparent materials using “crystalline” polymer. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/polb.23889] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Muhammad Abdullah Al Mamun
- Graduate School of Science and Engineering; Saitama University; 255 Shimo-Okubo Sakura-Ku, Saitama 338-8570 Japan
| | - Youichi Soutome
- Graduate School of Science and Engineering; Saitama University; 255 Shimo-Okubo Sakura-Ku, Saitama 338-8570 Japan
| | | | - Atsuhiro Fujimori
- Graduate School of Science and Engineering; Saitama University; 255 Shimo-Okubo Sakura-Ku, Saitama 338-8570 Japan
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Wu S, Huang G, Wu J, Li H. Interfacial crystallization of low-crystallinity elastomer incorporated by multi-walled carbon nanotubes: Mechanical reinforcement, structural evolution and enhanced thermal stability. J Appl Polym Sci 2015. [DOI: 10.1002/app.42368] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Siduo Wu
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering, Sichuan University; Chengdu 610065 People's Republic of China
| | - Guangsu Huang
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering, Sichuan University; Chengdu 610065 People's Republic of China
| | - Jinrong Wu
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering, Sichuan University; Chengdu 610065 People's Republic of China
| | - Hui Li
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering, Sichuan University; Chengdu 610065 People's Republic of China
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Durand N, Habas JP, Boutevin B, Améduri B. Dispersion of silica nanoparticles bearing perfluorohexyl units into fluorinated copolymers. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/pola.27586] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Nelly Durand
- Ingénierie et Architectures Macromoléculaires, Institut Charles Gerhardt (UMR 5253-CNRS); Ecole Nationale Supérieure de Chimie de Montpellier, 8, rue de l'Ecole Normale Montpellier 34296 Cedex France
| | - Jean-Pierre Habas
- Ingénierie et Architectures Macromoléculaires, Institut Charles Gerhardt (UMR 5253-CNRS), University of Montpellier; Montpellier 34095 France
| | - Bernard Boutevin
- Ingénierie et Architectures Macromoléculaires, Institut Charles Gerhardt (UMR 5253-CNRS); Ecole Nationale Supérieure de Chimie de Montpellier, 8, rue de l'Ecole Normale Montpellier 34296 Cedex France
| | - Bruno Améduri
- Ingénierie et Architectures Macromoléculaires, Institut Charles Gerhardt (UMR 5253-CNRS); Ecole Nationale Supérieure de Chimie de Montpellier, 8, rue de l'Ecole Normale Montpellier 34296 Cedex France
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Wu S, Huang G, Wu J, Tian F, Li H. Structural evolution of OBC/carbon nanotube bundle nanocomposites under uniaxial deformation. RSC Adv 2015. [DOI: 10.1039/c5ra02942b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A regulated morphology of multi-walled CNT bundles in an olefin block copolymer matrix is achieved via solution blending after sonication. We observed an unexpected inverse evolution trend of long period in nanocomposites compared to that in neat matrix.
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Affiliation(s)
- Siduo Wu
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065
- People's Republic of China
| | - Guangsu Huang
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065
- People's Republic of China
| | - Jinrong Wu
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065
- People's Republic of China
| | - Feng Tian
- Shanghai Institute of Applied Physics
- Chinese Academy of Science
- Shanghai 201204
- China
| | - Hui Li
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065
- People's Republic of China
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Li X, Tian F, Yang C, Tang Z, Miao X, Wu G, Li X, Wang J, Li L. In situsmall angle X-ray scattering study on structural evolution of crosslinked polytetrafluoroethylene during deformation. J Appl Polym Sci 2014. [DOI: 10.1002/app.39883] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xiaoyun Li
- Shanghai Synchrotron Radiation Facility; Shanghai Institute of Applied Physics; Chinese Academy of Sciences Shanghai China
| | - Feng Tian
- Shanghai Synchrotron Radiation Facility; Shanghai Institute of Applied Physics; Chinese Academy of Sciences Shanghai China
| | - Chunming Yang
- Shanghai Synchrotron Radiation Facility; Shanghai Institute of Applied Physics; Chinese Academy of Sciences Shanghai China
| | - Zhongfeng Tang
- Shanghai Synchrotron Radiation Facility; Shanghai Institute of Applied Physics; Chinese Academy of Sciences Shanghai China
| | - Xiaran Miao
- Shanghai Synchrotron Radiation Facility; Shanghai Institute of Applied Physics; Chinese Academy of Sciences Shanghai China
| | - Guozhong Wu
- Shanghai Synchrotron Radiation Facility; Shanghai Institute of Applied Physics; Chinese Academy of Sciences Shanghai China
| | - Xiuhong Li
- Shanghai Synchrotron Radiation Facility; Shanghai Institute of Applied Physics; Chinese Academy of Sciences Shanghai China
| | - Jie Wang
- Shanghai Synchrotron Radiation Facility; Shanghai Institute of Applied Physics; Chinese Academy of Sciences Shanghai China
| | - Liangbin Li
- National Synchrotron Radiation Laboratory and College of Nuclear Science and Technology; University of Science and Technology of China; Hefei China
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Chen Y, Lin B, Yang H, Sun Y, Zhang X. Dramatic enhancement of carbon nanotube dispersion in polyimide composites by a two-step amino functionalization approach. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/pola.26742] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yaqin Chen
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 China
| | - Baoping Lin
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 China
| | - Hong Yang
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 China
| | - Ying Sun
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 China
| | - Xueqin Zhang
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 China
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Zhang RC, Lu A, Xu ZB. Effect of molecular weight on crystallization of semirigid poly(phenylene sulfide) under shear flow. J Appl Polym Sci 2011. [DOI: 10.1002/app.35046] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Meier MS, Selegue JP, Cassity KB, Kaur AP, Qian D. Linear and spiral forms of longitudinal cuts in graphitized N-doped multiwalled carbon nanotubes (g-N-MWCNTs). JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2010; 22:334219. [PMID: 21386509 DOI: 10.1088/0953-8984/22/33/334219] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Nitrogen-containing multiwalled nanotubes (N-MWCNTs), formed by CVD from a nitrogen-containing feedstock have a 'bamboo' structure in which the axes of the graphene planes are not parallel to the axis of the nanotube and the core is periodically bridged. We find that thermal and chemical treatment of these materials can produce nanotubes that have been cut longitudinally in either a linear or in a spiral manner. In addition, these longitudinally cut nanotubes can be partially or fully unrolled by sonication in an aqueous surfactant, producing graphite platelets as well as narrow structures that could be thin graphite ribbons or very narrow, intact N-MWCNTs. These different morphologies of graphite, available from one source, suggest that there are multiple structures of N-MWCNTs present, few as simple as stacked cups or nested scrolls.
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Affiliation(s)
- Mark S Meier
- Department of Chemistry and Center for Applied Energy Research, University of Kentucky, Lexington, KY 40506, USA.
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Chubarova EV, Melenevskaya EY. Chain Degradation during Dissolution of Polymer-Fullerene Nanocomposites as a Result of Interaction of Entangled Polymer Matrix with the Filler. J MACROMOL SCI B 2010. [DOI: 10.1080/00222340903346734] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Elena V. Chubarova
- a Institute of Macromolecular Compounds , Russian Academy of Sciences , Bolshoi, St. Petersburg, Russia
| | - Elena Yu. Melenevskaya
- a Institute of Macromolecular Compounds , Russian Academy of Sciences , Bolshoi, St. Petersburg, Russia
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Koch MHJ, Bras W. Synchrotron radiation studies of non-crystalline systems. ACTA ACUST UNITED AC 2008. [DOI: 10.1039/b703892p] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Chen X, Burger C, Wan F, Zhang J, Rong L, Hsiao BS, Chu B, Cai J, Zhang L. Structure Study of Cellulose Fibers Wet-Spun from Environmentally Friendly NaOH/Urea Aqueous Solutions. Biomacromolecules 2007; 8:1918-26. [PMID: 17472335 DOI: 10.1021/bm061186i] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this study, structure changes of regenerated cellulose fibers wet-spun from a cotton linter pulp (degree of polymerization approximately 620) solution in an NaOH/urea solvent under different conditions were investigated by simultaneous synchrotron wide-angle X-ray diffraction (WAXD) and small-angle X-ray scattering (SAXS). WAXD results indicated that the increase in flow rate during spinning produced a better crystal orientation and a higher degree of crystallinity, whereas a 2-fold increase in draw ratio only affected the crystal orientation. When coagulated in a H2SO4/Na2SO4 aqueous solution at 15 degrees C, the regenerated fibers exhibited the highest crystallinity and a crystal orientation comparable to that of commercial rayon fibers by the viscose method. SAXS patterns exhibited a pair of meridional maxima in all regenerated cellulose fibers, indicating the existence of a lamellar structure. A fibrillar superstructure was observed only at higher flow rates (>20 m/min). The conformation of cellulose molecules in NaOH/urea aqueous solution was also investigated by static and dynamic light scattering. It was found that cellulose chains formed aggregates with a radius of gyration, Rg, of about 232 nm and an apparent hydrodynamic radius, Rh, of about 172 nm. The NaOH/urea solvent system is low-cost and environmentally friendly, which may offer an alternative route to replace more hazardous existing methods for the production of regenerated cellulose fibers.
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Affiliation(s)
- Xuming Chen
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, USA
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Deformation behaviour during cold drawing of nanocomposites based on single wall carbon nanotubes and poly(ether ester) copolymers. POLYMER 2007. [DOI: 10.1016/j.polymer.2007.03.070] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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High-shear processing induced homogenous dispersion of pristine multiwalled carbon nanotubes in a thermoplastic elastomer. POLYMER 2007. [DOI: 10.1016/j.polymer.2007.02.066] [Citation(s) in RCA: 109] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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