51
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Su DS, Wen G, Wu S, Peng F, Schlögl R. Carbokatalyse in Flüssigphasenreaktionen. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201600906] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Dang Sheng Su
- Shenyang National Laboratory for Materials Science; Institute of Metal Research, Chinese Academy of Sciences; 72 Wenhua Road Shenyang 110016 China
| | - Guodong Wen
- Shenyang National Laboratory for Materials Science; Institute of Metal Research, Chinese Academy of Sciences; 72 Wenhua Road Shenyang 110016 China
| | - Shuchang Wu
- Max-Planck-Institut für chemische Energiekonversion; Stiftstraße 34-36 45470 Mülheim an der Ruhr Deutschland
| | - Feng Peng
- School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou Guangdong 510640 China
| | - Robert Schlögl
- Max-Planck-Institut für chemische Energiekonversion; Stiftstraße 34-36 45470 Mülheim an der Ruhr Deutschland
- Fritz-Haber-Institut der Max-Planck-Gesellschaft; Faradayweg 4-6 Berlin 14195 Deutschland
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52
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Zhou G, Wang L, Li J, Tai J, Su H, Zhang J, Xi Y, Fan Y. A double-lyophilization method for the preparation of CS/GO-COOH scaffold and its application in blood detoxification. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2016; 27:1788-1807. [PMID: 27653978 DOI: 10.1080/09205063.2016.1237451] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The accumulation of uremic toxins in blood might induce chronic renal failure (CRF). The incidence of CRF was as high as 10%. The traditional therapy for CRF was hemodialysis, which was more effective to remove small molecules, such as urea and creatinine. However, this detoxification method ignored the tissue functional adaption due to the retention of macromolecule uremic toxins. To solve this problem, this paper developed a new kind of chitosan/carboxyl graphite oxide (CS/GO-COOH) scaffold via a double-lyophilization method. Then, this synthetic scaffold was characterized by Fourier transform infrared spectroscopy, scanning electron microscope, hydrophilic test, mechanical property, and in vitro detoxification test. Covalent bonding and hydrogen bonding were formed, indicating the strong interactions between CS and GO-COOH. There were interconnected networks in the synthesized scaffold. The mechanical test suggested that the GO-2500 scaffold had excellent mechanical strength, which was 7.41 ± 0.82 MPa with 25% shrink. What is more, GO-2500 could totally rebound within 1s, after compressed to 90% shrink. The rates of GO-2500 were 1587 ± 60 and 246 ± 10% according to the water uptake and retention data, respectively. Furthermore, the detoxification of GO-2500 to urea, creatinine, VB12, and β2-m were 67.59 ± 2.31, 39.67 ± 2.95, 31.51 ± 2.62, and 83.82 ± 7.76 mg/g, respectively. The resulting CS/GO-COOH scaffold held great potential for the detoxification of uremic toxins.
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Affiliation(s)
- Gang Zhou
- a Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering , Beihang University , Beijing , China
| | - Lei Wang
- a Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering , Beihang University , Beijing , China
| | - Jianchao Li
- a Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering , Beihang University , Beijing , China
| | - Jun Tai
- b Beijing Key Laboratory for Pediatric Diseases of Otolaryngology, Head and Neck Surgery , Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University , Beijing , China.,c Otolaryngology, Head and Neck Surgery, Beijing Children's Hospital , Capital Medical University , Beijing , China
| | - Haisheng Su
- a Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering , Beihang University , Beijing , China
| | - Jing Zhang
- a Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering , Beihang University , Beijing , China
| | - Yuan Xi
- a Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering , Beihang University , Beijing , China
| | - Yubo Fan
- a Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering , Beihang University , Beijing , China
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53
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Gao B, Zhang R, Gao F, He M, Wang C, Liu L, Zhao L, Cui H. Interfacial Microstructure and Enhanced Mechanical Properties of Carbon Fiber Composites Caused by Growing Generation 1-4 Dendritic Poly(amidoamine) on a Fiber Surface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:8339-8349. [PMID: 27472250 DOI: 10.1021/acs.langmuir.6b01485] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In an attempt to improve the mechanical properties of carbon fiber composites, propagation of poly(amidoamine) (PAMAM) dendrimers by in situ polymerization on a carbon fiber surface was performed. During polymerization processes, PAMAM was grafted on carbon fiber by repeated Michael addition and amidation reactions. The changes in surface microstructure and the chemical composition of carbon fibers before and after modification were investigated by atomic force microscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy. All the results indicated that PAMAM was successfully grown on the carbon fiber surface. Such propagation could significantly increase the surface roughness and introduce sufficient polar groups onto the carbon fiber surface, enhancing the surface wettability of carbon fiber. The fractured surface of carbon fiber-reinforced composites showed a great enhancement of interfacial adhesion. Compared with those of desized fiber composites, the interlaminar shear strength and interfacial shear strength of PAMAM/fiber-reinforced composites showed increases of 55.49 and 110.94%, respectively.
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Affiliation(s)
- Bo Gao
- School of Materials Science and Engineering, Shandong University of Science and Technology , 266590 Qingdao, People's Republic of China
| | - Ruliang Zhang
- School of Materials Science and Engineering, Shandong University of Science and Technology , 266590 Qingdao, People's Republic of China
- Carbon Fiber Engineering Research Center, School of Materials Science and Engineering, Shandong University , 250061 Jinan, People's Republic of China
| | - Fucheng Gao
- School of Materials Science and Engineering, Shandong University of Science and Technology , 266590 Qingdao, People's Republic of China
| | - Maoshuai He
- School of Materials Science and Engineering, Shandong University of Science and Technology , 266590 Qingdao, People's Republic of China
| | - Chengguo Wang
- Carbon Fiber Engineering Research Center, School of Materials Science and Engineering, Shandong University , 250061 Jinan, People's Republic of China
| | - Lei Liu
- School of Materials Science and Engineering, Shandong University of Science and Technology , 266590 Qingdao, People's Republic of China
| | - Lifen Zhao
- School of Materials Science and Engineering, Shandong University of Science and Technology , 266590 Qingdao, People's Republic of China
| | - Hongzhi Cui
- School of Materials Science and Engineering, Shandong University of Science and Technology , 266590 Qingdao, People's Republic of China
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54
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Vacchi IA, Spinato C, Raya J, Bianco A, Ménard-Moyon C. Chemical reactivity of graphene oxide towards amines elucidated by solid-state NMR. NANOSCALE 2016; 8:13714-13721. [PMID: 27411370 DOI: 10.1039/c6nr03846h] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Graphene oxide (GO) is an attractive nanomaterial for many applications. Controlling the functionalization of GO is essential for the design of graphene-based conjugates with novel properties. But, the chemical composition of GO has not been fully elucidated yet. Due to the high reactivity of the oxygenated moieties, mainly epoxy, hydroxyl and carboxyl groups, several derivatization reactions may occur concomitantly. The reactivity of GO with amine derivatives has been exploited in the literature to design graphene-based conjugates, mainly through amidation. However, in this study we undoubtedly demonstrate using magic angle spinning (MAS) solid-state NMR that the reaction between GO and amine functions occurs via ring opening of the epoxides, and not by amidation. We also prove that there is a negligible amount of carboxylic acid groups in two GO samples obtained by a different synthesis process, hence eliminating the possibility of amidation reactions with amine derivatives. This work brings additional insights into the chemical reactivity of GO, which is fundamental to control its functionalization, and highlights the major role of MAS NMR spectroscopy for a comprehensive characterization of derivatized GO.
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Affiliation(s)
- Isabella A Vacchi
- CNRS, Institut de Biologie Moléculaire et Cellulaire, Immunopathologie et Chimie Thérapeutique, 67000 Strasbourg, France.
| | - Cinzia Spinato
- CNRS, Institut de Biologie Moléculaire et Cellulaire, Immunopathologie et Chimie Thérapeutique, 67000 Strasbourg, France.
| | - Jésus Raya
- Membrane Biophysics and NMR, Institute of Chemistry, UMR 7177, University of Strasbourg, Strasbourg, France
| | - Alberto Bianco
- CNRS, Institut de Biologie Moléculaire et Cellulaire, Immunopathologie et Chimie Thérapeutique, 67000 Strasbourg, France.
| | - Cécilia Ménard-Moyon
- CNRS, Institut de Biologie Moléculaire et Cellulaire, Immunopathologie et Chimie Thérapeutique, 67000 Strasbourg, France.
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55
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High-Performance Flexible Solid-State Carbon Cloth Supercapacitors Based on Highly Processible N-Graphene Doped Polyacrylic Acid/Polyaniline Composites. Sci Rep 2016; 6:12883. [PMID: 26883179 PMCID: PMC4756666 DOI: 10.1038/srep12883] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Accepted: 07/13/2015] [Indexed: 11/29/2022] Open
Abstract
Improving the solubility of conductive polymers to facilitate processing usually decreases their conductivity, and they suffer from poor cycling stability due to swelling-shrinking during charging cycles. We circumvent these problems with a novel preparation method for nitrogen-doped graphene (NG) enhanced polyacrylic acid/polyaniline (NG-PAA/PANI) composites, ensuring excellent processibility for scalable production. The content of PANI is maximized under the constraint of still allowing defect-free coatings on filaments of carbon cloth (CC). The NG content is then adjusted to optimize specific capacitance. The optimal CC electrodes have 32 wt.% PANI and 1.3 wt.% NG, thus achieving a high capacitance of 521 F/g at 0.5 F/g. A symmetric supercapacitor made from 20 wt.% PANI CC electrodes has more than four times the capacitance (68 F/g at 1 A/g) of previously reported flexible capacitors based on PANI-carbon nanotube composites, and it retains the full capacitance under large bending angles. The capacitor exhibits high energy and power densities (5.8 Wh/kg at 1.1 kW/kg), a superior rate capability (still 81% of the 1 A/g capacitance at 10 A/g), and long-term electrochemical stability (83.2% retention after 2000 cycles).
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56
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Acocella MR, Corcione CE, Giuri A, Maggio M, Maffezzoli A, Guerra G. Graphene oxide as a catalyst for ring opening reactions in amine crosslinking of epoxy resins. RSC Adv 2016. [DOI: 10.1039/c6ra00485g] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The influence of different graphite-based nanofillers on epoxide ring opening reactions, as induced by amines for diglycidyl ether of bisphenol A (DGEBA), is studied.
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Affiliation(s)
- M. R. Acocella
- Department of Chemistry and Biology and INSTM Research Unit
- Università di Salerno
- Fisciano
- Italy
| | | | - A. Giuri
- Dipartimento di Ingegneria dell'Innovazione
- Università del Salento
- Lecce
- Italy
| | - M. Maggio
- Department of Chemistry and Biology and INSTM Research Unit
- Università di Salerno
- Fisciano
- Italy
| | - A. Maffezzoli
- Dipartimento di Ingegneria dell'Innovazione
- Università del Salento
- Lecce
- Italy
| | - G. Guerra
- Department of Chemistry and Biology and INSTM Research Unit
- Università di Salerno
- Fisciano
- Italy
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57
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Ferreira FV, Cividanes LDS, Brito FS, de Menezes BRC, Franceschi W, Simonetti EAN, Thim GP. Functionalization of Graphene and Applications. FUNCTIONALIZING GRAPHENE AND CARBON NANOTUBES 2016. [DOI: 10.1007/978-3-319-35110-0_1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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58
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Xu J, Xu M, Wu J, Wu H, Zhang WH, Li YX. Graphene oxide immobilized with ionic liquids: facile preparation and efficient catalysis for solvent-free cycloaddition of CO2 to propylene carbonate. RSC Adv 2015. [DOI: 10.1039/c5ra13533h] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Graphene oxides were grafted with functionalized ionic liquid and showed high catalytic activity in cycloaddition of CO2 with propylene oxide to propylene carbonate.
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Affiliation(s)
- Jie Xu
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- School of Petrochemical Engineering
- Changzhou University
- Changzhou
- PR China
| | - Mang Xu
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- School of Petrochemical Engineering
- Changzhou University
- Changzhou
- PR China
| | - Jing Wu
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- School of Petrochemical Engineering
- Changzhou University
- Changzhou
- PR China
| | - Hao Wu
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- School of Petrochemical Engineering
- Changzhou University
- Changzhou
- PR China
| | - Wei-Hong Zhang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- School of Petrochemical Engineering
- Changzhou University
- Changzhou
- PR China
| | - Yong-Xin Li
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- School of Petrochemical Engineering
- Changzhou University
- Changzhou
- PR China
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59
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Wang Y, Wang X, Tang S, Vongehr S, Ali Syed J, Meng X. Highly processible and electrochemically active graphene-doped polyacrylic acid/polyaniline allowing the preparation of defect-free thin films for solid-state supercapacitors. RSC Adv 2015. [DOI: 10.1039/c5ra05486a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Graphene doped polyacrylic acid/polyaniline composites were prepared with excellent processibility for ensuring ultrathin, defect-free and highly flexible films as well as high electrochemical performance.
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Affiliation(s)
- Yongguang Wang
- National Laboratory of Solid State Microstructures
- College of Engineering Applied Sciences
- Institute of Materials Engineering
- Nanjing University
- P. R. China
| | - Xiangyu Wang
- National Laboratory of Solid State Microstructures
- College of Engineering Applied Sciences
- Institute of Materials Engineering
- Nanjing University
- P. R. China
| | - Shaochun Tang
- National Laboratory of Solid State Microstructures
- College of Engineering Applied Sciences
- Institute of Materials Engineering
- Nanjing University
- P. R. China
| | - Sascha Vongehr
- National Laboratory of Solid State Microstructures
- College of Engineering Applied Sciences
- Institute of Materials Engineering
- Nanjing University
- P. R. China
| | - Junaid Ali Syed
- National Laboratory of Solid State Microstructures
- College of Engineering Applied Sciences
- Institute of Materials Engineering
- Nanjing University
- P. R. China
| | - Xiangkang Meng
- National Laboratory of Solid State Microstructures
- College of Engineering Applied Sciences
- Institute of Materials Engineering
- Nanjing University
- P. R. China
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