1
|
Ahmed F, Kim D, Lei J, Ryu T, Yoon S, Zhang W, Lim H, Jang G, Jang H, Kim W. UV-Cured Cross-Linked Astounding Conductive Polymer Electrolyte for Safe and High-Performance Li-Ion Batteries. ACS APPLIED MATERIALS & INTERFACES 2021; 13:34102-34113. [PMID: 34261308 DOI: 10.1021/acsami.1c06233] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
UV-cured cross-linked polymer electrolytes are promising electrolytes for safe Li-ion batteries (LIBs) application due to their excellent conduction ability, low glass-transition temperature (Tg), and high discharge capacity. Herein, we have prepared novel fluorosulfonylimide methacrylic-based cross-linked polymer electrolyte membranes for LIBs via UV-curing process, which is a well-known, easy, low-cost, fast, and reliable technique. The synthesized UV-reactive novel methacrylate monomer with directly attached fluorosulfonylimide functional group methacryloylcarbamoyl sulfamoyl fluoride (MACSF) was used as a precursor for UV curing along with poly(ethylene glycol) dimethacrylate (PEGDMA) and lithium bis(fluorosulfonyl)imide (LiFSI). The results demonstrated that the cross-linked membrane with an optimized amount (30 wt %) of MACSF monomer (noted as CPE-3) showed the best performance. The nonflammable fluorosulfonyl group (a hydrophilic group of MACSF monomer) in the polymer matrix formed a wide channel, as a result of which Li ion can migrate easily via forming an ionic linkage. The CPE-3 electrolyte exhibited a low Tg (-79 °C), excellent phase separation, high conductivity (σ) (ca. 3.5 × 10-4 and 8.50 × 10-3 S·cm-1 at 30 and 80 °C, respectively), and high flame retardancy. The battery performance of half-cell (LiFePO4/CPE-3/Li) and full cell (LiFePO4/CPE-3/graphite) with CPE-3 electrolyte were attractive: discharge capacities (155 and 152 mAh/g) with the capacity retentions of 96.17 and 95.17% after 500 cycles at 0.1 C rate for half-cell and full-cell LIBs, respectively.
Collapse
Affiliation(s)
- Faiz Ahmed
- University Grenoble Alpes, CNRS, LEPMI, Grenoble-INP, 38000 Grenoble, France
| | - Daeho Kim
- Department of Applied Chemistry, Konkuk University, Chungju 380-701, The Republic of Korea
| | - Jin Lei
- Department of Applied Chemistry, Konkuk University, Chungju 380-701, The Republic of Korea
| | - Taewook Ryu
- Department of Applied Chemistry, Konkuk University, Chungju 380-701, The Republic of Korea
| | - Sujin Yoon
- Department of Applied Chemistry, Konkuk University, Chungju 380-701, The Republic of Korea
| | - Wei Zhang
- Department of Applied Chemistry, Konkuk University, Chungju 380-701, The Republic of Korea
| | - Hyunmin Lim
- Department of Applied Chemistry, Konkuk University, Chungju 380-701, The Republic of Korea
| | - Giseok Jang
- Department of Applied Chemistry, Konkuk University, Chungju 380-701, The Republic of Korea
| | - Hohyoun Jang
- College of Liberal Arts, Konkuk University, Chungju 380-701, The Republic of Korea
| | - Whangi Kim
- Department of Applied Chemistry, Konkuk University, Chungju 380-701, The Republic of Korea
| |
Collapse
|
2
|
Dong YZ, Kim HM, Choi HJ. Conducting polymer-based electro-responsive smart suspensions. CHEMICAL PAPERS 2021. [DOI: 10.1007/s11696-021-01550-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
3
|
Kim YK, Lee Y, Shin KY. Black phosphorus-based smart electrorheological fluid with tailored phase transition and exfoliation. J IND ENG CHEM 2020. [DOI: 10.1016/j.jiec.2020.07.032] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
4
|
Nanoparticles Functionalized by Conducting Polymers and Their Electrorheological and Magnetorheological Applications. Polymers (Basel) 2020; 12:polym12010204. [PMID: 31941163 PMCID: PMC7023545 DOI: 10.3390/polym12010204] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2019] [Revised: 12/25/2019] [Accepted: 01/06/2020] [Indexed: 11/17/2022] Open
Abstract
Conducting polymer-coated nanoparticles used in electrorheological (ER) and magnetorheological (MR) fluids are reviewed along with their fabrication methods, morphologies, thermal properties, sedimentation stabilities, dielectric properties, and ER and MR characteristics under applied electric or magnetic fields. After functionalization of the conducting polymers, the nanoparticles exhibited properties suitable for use as ER materials, and materials in which magnetic particles are used as a core could also be applied as MR materials. The conducting polymers covered in this study included polyaniline and its derivatives, poly(3,4-ethylenedioxythiophene), poly(3-octylthiophene), polypyrrole, and poly(diphenylamine). The modified nanoparticles included polystyrene, poly(methyl methacrylate), silica, titanium dioxide, maghemite, magnetite, and nanoclay. This article reviews many core-shell structured conducting polymer-coated nanoparticles used in ER and MR fluids and is expected to contribute to the understanding and development of ER and MR materials.
Collapse
|
5
|
Omambala JR, McIntyre EC, Gallo AA. Electrorheological Effects of Synthesized Octa-cyanopropylsilsesquioxane Cage Structure. ACS OMEGA 2019; 4:20955-20963. [PMID: 31867486 PMCID: PMC6921262 DOI: 10.1021/acsomega.9b02105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 10/30/2019] [Indexed: 06/10/2023]
Abstract
This article introduces a new electrorheological (ER) fluid. A molecular cage structure for electrorheological applications has been synthesized, and the ER behavior of the octa-functionalized polyhedral oligomeric silsesquioxane (POSS) variant in silicone oil (PDMS) has been shown. The hydrolyzation route has been used in the synthesis, the microstructure has been displayed using scanning electron microscopy, the yield has been ascertained, and the compound has been characterized. The rheological properties are demonstrated on the ER fluid through steady flow and oscillatory tests to investigate the effects of change in concentration on the functional group attached to the inorganic silicon-oxygen core structure of the POSS compound. The electrorheological efficiency was analyzed, and dielectric characterization was done. The flow curve was described by the Herschel-Bulkley model, and yield stress values were derived from the model. The octa-cyanoPOSS/PDMS electrorheological fluid has been shown to have ER activity.
Collapse
Affiliation(s)
- Joshua R. Omambala
- Departments of
Chemical Engineering
and Chemistry, University of Louisiana at
Lafayette, Lafayette, Louisiana 70503, United States
| | - Ernest C. McIntyre
- Departments of
Chemical Engineering
and Chemistry, University of Louisiana at
Lafayette, Lafayette, Louisiana 70503, United States
| | - August A. Gallo
- Departments of
Chemical Engineering
and Chemistry, University of Louisiana at
Lafayette, Lafayette, Louisiana 70503, United States
| |
Collapse
|
6
|
Omambala JR, McIntyre EC, Gallo AA. Comparing the Electrorheological Effect of Polyhedral Silsesquioxane Cage Structures with Different Numbers of Cyanopropyl Functional Groups. ACS OMEGA 2019; 4:20964-20971. [PMID: 31867487 PMCID: PMC6921256 DOI: 10.1021/acsomega.9b02106] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 10/30/2019] [Indexed: 06/10/2023]
Abstract
Previous research has shown that polyhedral oligomeric silsesquioxane (POSS) particles in silicone oil show electrorheological (ER) activity. The effect of the number of same functional groups attached to POSS cage structures on the ER activity of these structures is discussed in this article. Two compounds of the octahedral geometry (T8) of cyanopropyl POSS (cPOSS) were used for this investigation. One of the compounds (monofunctionalized cPOSS) was commercially available, and the other (octafunctionalized cPOSS) was synthesized. The effects of the number of cyanopropyl functional groups attached to the inorganic silicon-oxygen core structure of the POSS compounds on the rheological properties are demonstrated through steady flow and oscillatory tests. Particular attention is paid to how the number of cyano functional groups affects the behavior of these suspensions of cPOSS compounds in silicone oil under increasing electric field strength. The research also contributed answers to the effects of changing the concentration of the cPOSS particles in the suspension. The flow curve was described by the Herschel-Bulkley model, and the yield stress values were ascertained from the model. The dielectric characterization was also done to support the ER response results, which showed that the octafunctionalized compound gave a better response. The differences in the ER properties of these compounds have also been discussed with the tests.
Collapse
Affiliation(s)
- Joshua R. Omambala
- Departments of
Chemical Engineering and Chemistry, University
of Louisiana at Lafayette, Lafayette, Louisiana 70503, United States
| | - Ernest C. McIntyre
- Departments of
Chemical Engineering and Chemistry, University
of Louisiana at Lafayette, Lafayette, Louisiana 70503, United States
| | - August A. Gallo
- Departments of
Chemical Engineering and Chemistry, University
of Louisiana at Lafayette, Lafayette, Louisiana 70503, United States
| |
Collapse
|
7
|
Synthesis and characterization of novel p-type chemically cross-linked ionogels with high ionic seebeck coefficient for low-grade heat harvesting. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.134575] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
8
|
Liu W, Xie Z, Lu Y, Gao M, Zhang W, Gao L. Fabrication and excellent electroresponsive properties of ideal PMMA@BaTiO 3 composite particles. RSC Adv 2019; 9:12404-12414. [PMID: 35515821 PMCID: PMC9063694 DOI: 10.1039/c9ra01174a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 03/30/2019] [Indexed: 11/21/2022] Open
Abstract
A series of core–shell-structured poly(methylmethacrylate)@BaTiO3 (PMMA@BT) composite particles were constructed via the self-assembly of BT nanoparticles on the surfaces of PMMA cores through the covalent bonding of siloxane groups at room temperature. The PMMA@BT composite particles were characterized by scanning electron microscopy, transmission electron microscopy, infrared spectroscopy, X-ray diffraction, video-based optical contact angle measurement, thermogravimetric analysis, and impedance analysis. The electroresponses of the obtained PMMA@BT composite particles were all stronger than that of pure BT, and the electroresponse depended on the weight percentage of the BT shell. The PMMA@BT particles with the optimal core–shell structure contained 58.14 wt% of BT shell. The surface hydrophilicity of the optimal particles was close to that of pure BT, and the dielectric constant was the greatest among the series of synthesized PMMA@BT particles. Thus, the optimized PMMA@BT particles demonstrated the strongest electroresponsive behavior in gelatin hydrogel elastomer, as demonstrated by polarized microscopy and dynamic mechanical analysis. The excellent electroresponsive property of the optimal PMMA@BT particles is reflected by the large sensitivity of the increase in storage modulus for the gelatin hydrogel elastomer containing the composite particles (21% at E = 0.8 kV mm−1 and a particle loading of 1.0 wt%), far greater than that of pure BT particles (4.7%). Based on the sensitive electroresponsive properties, the PMMA@BT particles have potential applications as electroresponsive materials. A series of core–shell-structured poly(methylmethacrylate)@BaTiO3 (PMMA@BT) composite particles were constructed via the self-assembly of BT nanoparticles on the surfaces of PMMA cores through the covalent bonding of siloxane groups at room temperature.![]()
Collapse
Affiliation(s)
- Wen Liu
- Key Laboratory of Applied Surface and Colloid Chemistry (Shaanxi Normal University), Ministry of Education Xi'an 710119 PR China +86-29-8153-0727 +86-29-8153-0730 +86-29-81530813.,School of Chemistry & Chemical Engineering, Shaanxi Normal University Xi'an 710119 PR China
| | - Zunyuan Xie
- Key Laboratory of Applied Surface and Colloid Chemistry (Shaanxi Normal University), Ministry of Education Xi'an 710119 PR China +86-29-8153-0727 +86-29-8153-0730 +86-29-81530813.,School of Chemistry & Chemical Engineering, Shaanxi Normal University Xi'an 710119 PR China
| | - Yaping Lu
- Key Laboratory of Applied Surface and Colloid Chemistry (Shaanxi Normal University), Ministry of Education Xi'an 710119 PR China +86-29-8153-0727 +86-29-8153-0730 +86-29-81530813.,School of Chemistry & Chemical Engineering, Shaanxi Normal University Xi'an 710119 PR China
| | - Meixiang Gao
- Yulin Vocational and Technical College Yulin 719000 PR China
| | - Weiqiang Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry (Shaanxi Normal University), Ministry of Education Xi'an 710119 PR China +86-29-8153-0727 +86-29-8153-0730 +86-29-81530813.,School of Chemistry & Chemical Engineering, Shaanxi Normal University Xi'an 710119 PR China
| | - Lingxiang Gao
- Key Laboratory of Applied Surface and Colloid Chemistry (Shaanxi Normal University), Ministry of Education Xi'an 710119 PR China +86-29-8153-0727 +86-29-8153-0730 +86-29-81530813.,School of Chemistry & Chemical Engineering, Shaanxi Normal University Xi'an 710119 PR China
| |
Collapse
|
9
|
Wang G, Ma Y, Cui G, Li N, Dong X. Two-dimensional Fe 3O 4/MoS 2 nanocomposites for a magnetorheological fluid with enhanced sedimentation stability. SOFT MATTER 2018; 14:1917-1924. [PMID: 29468233 DOI: 10.1039/c7sm02425h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Superparamagnetic Fe3O4 nanoparticles were successfully deposited on the surface of MoS2 nanosheets (Fe3O4/MoS2) by a sonochemical method and the obtained Fe3O4/MoS2 nanocomposites were used as a promising candidate for a magnetorheological (MR) fluid. This MR fluid was prepared from the Fe3O4/MoS2 nanocomposites and its corresponding MR performances were examined using a rotational rheometer. The MR fluid based on Fe3O4/MoS2 showed typical MR effects with increasing viscosity, shear stress, yield stress and dynamic shear modulus depending on the applied magnetic fields. Compared with commercial carbonyl iron (CI) particles, the sedimentation stability of the Fe3O4/MoS2-MR fluid was greatly improved because of its unique two-dimensional structure and the reduced fluid-particle density mismatch. Therefore, the prepared Fe3O4/MoS2-based MR fluid with typical MR effects and good sedimentation stability would have great potential in practical applications.
Collapse
Affiliation(s)
- Guangshuo Wang
- School of Materials Science and Engineering, Hebei University of Engineering, Handan, 056038, China.
| | | | | | | | | |
Collapse
|
10
|
Gao CY, Meng LY, Piao SH, Choi HJ. Hollow submicron-sized spherical conducting polyaniline particles and their suspension rheology under applied electric fields. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.02.033] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
11
|
Brunelle AR, Horner CB, Low K, Ico G, Nam J. Electrospun thermosensitive hydrogel scaffold for enhanced chondrogenesis of human mesenchymal stem cells. Acta Biomater 2018; 66:166-176. [PMID: 29128540 DOI: 10.1016/j.actbio.2017.11.020] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 10/26/2017] [Accepted: 11/07/2017] [Indexed: 12/26/2022]
Abstract
Hydrogels have shown great potential for cartilage tissue engineering applications due to their capability to encapsulate cells within biomimetic, 3-dimensional (3D) microenvironments. However, the multi-step fabrication process that is necessary to produce cell/scaffold constructs with defined dimensions, limits their off-the-shelf translational usage. In this study, we have developed a hybrid scaffolding system which combines a thermosensitive hydrogel, poly(ethylene glycol)-poly(N-isopropylacrylamide) (PEG-PNIPAAm), with a biodegradable polymer, poly(ε-caprolactone) (PCL), into a composite, electrospun microfibrous structure. A judicious optimization of material composition and electrospinning process produced a structurally self-supporting hybrid scaffold. The reverse thermosensitivity of PEG-PNIPAAm allowed its dissolution/hydration upon cell seeding within a network of PCL microfibers while maintaining the overall scaffold shape at room temperature. A subsequent temperature elevation to 37 °C induced the hydrogel's phase transition to a gel state, effectively encapsulating cells in a 3D hydrogel without the use of a mold. We demonstrated that the hybrid scaffold enhanced chondrogenic differentiation of human mesenchymal stem cells (hMSCs) based on chondrocytic gene and protein expression, which resulted in superior viscoelastic properties of the cell/scaffold constructs. The hybrid scaffold enables a facile, single-step cell seeding process to inoculate cells within a 3D hydrogel with the potential for cartilage tissue engineering. STATEMENT OF SIGNIFICANCE Hydrogels have demonstrated the excellent ability to enhance chondrogenesis of stem cells due to their hydrated fibrous nanostructure providing a cellular environment similar to native cartilage. However, the necessity for multi-step processes, including mixing of hydrogel precursor with cells and subsequent gelation in a mold to form a defined shape, limits their off-the-shelf usage. In this study, we developed a hybrid scaffold by combining a thermosensitive hydrogel with a mechanically stable polymer, which provides a facile means to inoculate cells in a 3D hydrogel with a mold-less, single step cell seeding process. We further showed that the hybrid scaffold enhanced chondrogenesis of mesenchymal stem cells, demonstrating its potential for cartilage tissue engineering.
Collapse
|
12
|
Stejskal J, Bober P, Trchová M, Horský J, Walterová Z, Filippov SK, Plachý T, Mrlík M. Oxidation of pyrrole with p-benzoquinone to semiconducting products and their application in electrorheology. NEW J CHEM 2018. [DOI: 10.1039/c8nj01283k] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A low-molecular-weight organic semiconducting material was prepared by the redox interaction between pyrrole and p-benzoquinone.
Collapse
Affiliation(s)
- Jaroslav Stejskal
- Institute of Macromolecular Chemistry Academy of Sciences of the Czech Republic
- 162 06 Prague 6
- Czech Republic
| | - Patrycja Bober
- Institute of Macromolecular Chemistry Academy of Sciences of the Czech Republic
- 162 06 Prague 6
- Czech Republic
| | - Miroslava Trchová
- Institute of Macromolecular Chemistry Academy of Sciences of the Czech Republic
- 162 06 Prague 6
- Czech Republic
| | - Jiří Horský
- Institute of Macromolecular Chemistry Academy of Sciences of the Czech Republic
- 162 06 Prague 6
- Czech Republic
| | - Zuzana Walterová
- Institute of Macromolecular Chemistry Academy of Sciences of the Czech Republic
- 162 06 Prague 6
- Czech Republic
| | - Sergey K. Filippov
- Institute of Macromolecular Chemistry Academy of Sciences of the Czech Republic
- 162 06 Prague 6
- Czech Republic
| | - Tomáš Plachý
- Centre of Polymer Systems
- Tomas Bata University in Zlin
- 760 01 Zlin
- Czech Republic
| | - Miroslav Mrlík
- Centre of Polymer Systems
- Tomas Bata University in Zlin
- 760 01 Zlin
- Czech Republic
| |
Collapse
|
13
|
Marins JA, Soares BG. Ionic liquid-based organically modified silica for the development of new electrorheological fluids. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.05.091] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
14
|
|
15
|
Swelling-diffusion-interfacial polymerized core-shell typed polystyrene/poly(3, 4-ethylenedioxythiophene) microspheres and their electro-responsive characteristics. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.03.027] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
16
|
Lee S, Kim YK, Hong JY, Jang J. Electro-response of MoS2 Nanosheets-Based Smart Fluid with Tailorable Electrical Conductivity. ACS APPLIED MATERIALS & INTERFACES 2016; 8:24221-24229. [PMID: 27552369 DOI: 10.1021/acsami.6b07887] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The correlation between electrical conductivity and electro-responsive behavior is identified by introducing few-layer molybdenum disulfide (MoS2) nanosheets to electrorheological (ER) fluid. Few-layer MoS2 nanosheets are successfully fabricated, with a high yield of above 60%, using a straightforward method, and applied to an electro-responsive smart fluid. The electrical conductivity of MoS2 is easily tunable by adjusting the annealing temperature because of its semiconducting behavior. From an in-depth study on the conductivity-dependent ER behavior of few-layer MoS2 nanosheets, it can be verified that an optimum value of the electrical conductivity exists for the electro-responsive material, corresponding to the Wagner model. To the best of our knowledge, this is the first report on the potential of a transition-metal dichalcogenide as a candidate material for an ER fluid. This study may provide promising approaches for the performance improvement of electro-responsive smart fluids.
Collapse
Affiliation(s)
- Seungae Lee
- School of Chemical and Biological Engineering, College of Engineering, Seoul National University (SNU) , Seoul 151-742, Korea
| | - Yun Ki Kim
- School of Chemical and Biological Engineering, College of Engineering, Seoul National University (SNU) , Seoul 151-742, Korea
| | - Jin-Yong Hong
- School of Chemical and Biological Engineering, College of Engineering, Seoul National University (SNU) , Seoul 151-742, Korea
| | - Jyongsik Jang
- School of Chemical and Biological Engineering, College of Engineering, Seoul National University (SNU) , Seoul 151-742, Korea
| |
Collapse
|
17
|
Li Y, Guan Y, Liu Y, Yin J, Zhao X. Highly stable nanofluid based on polyhedral oligomeric silsesquioxane-decorated graphene oxide nanosheets and its enhanced electro-responsive behavior. NANOTECHNOLOGY 2016; 27:195702. [PMID: 27041243 DOI: 10.1088/0957-4484/27/19/195702] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Graphene oxide (GO) shows potential as an anisotropic nanofiller or a dispersed phase of electro-responsive electrorheological (ER) nanofluid due to its small size and high aspect ratio. But it is difficult to disperse GO in non-polar oil due to the hydrophilic nature of GO and thus the resulting fluid is often subject to dispersion instability and low ER effect. These disadvantages largely limit the real application of GO-based ER nanofluid. In this paper, we develop the polyhedral oligomeric silsesquioxane (POSS)-decorated GO (POSS-GO) nanosheets and demonstrate that decorating with POSS overcomes the dispersion instability of GO in silicone oil and enhances the ER effect. The morphology and structure of samples are characterized by atomic force microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, and x-ray photoelectronic spectroscopy. The results show that the POSS-GO nanosheets are ultrathin with ∼3 nm thickness and have good compatibility with silicone oil and, as a result, the nanofluid of POSS-GO nanosheets in silicone oil shows high dispersion stability. After standing for one year at room temperature, no sedimentation occurs. Under an external electric field, the ER efficiency of the POSS-GO nanofluid is ten times as high as that of the pure GO fluid. This enhanced electro-responsive behavior is related to the fact that decorating with POSS partly reduces the GO and compresses the dielectrophoretic effect of the negatively charged pure GO fluid.
Collapse
Affiliation(s)
- Yizhuo Li
- Smart Materials Laboratory, Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710129, People's Republic of China
| | | | | | | | | |
Collapse
|
18
|
Nanocomposite of bimetallic nanodendrite and reduced graphene oxide as a novel platform for molecular imprinting technology. Anal Chim Acta 2016; 918:77-88. [PMID: 27046213 DOI: 10.1016/j.aca.2016.02.046] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Revised: 02/23/2016] [Accepted: 02/27/2016] [Indexed: 01/10/2023]
Abstract
In this present work, for the first time, we are reporting a green synthesis approach for the preparation of vinyl modified reduced graphene oxide-based magnetic and bimetallic (Fe/Ag) nanodendrite (RGO@BMNDs). Herein, the RGO@BMNDs acts as a platform for the synthesis of the pyrazinamide (PZA)-imprinted polymer matrix and used for designing of the electrochemical sensor. We have demonstrated how the change in morphology could affect the electrochemical and magnetic property of nanomaterials and for this the reduced graphene oxide-based bimetallic nanoparticle (Fe/Ag) was also prepared It was found that the combination of graphene and bimetallic nanodendrites shows improvement as well as enhancement in the electrocatalytic activity and adsorption capacity, in comparison to their respective nanoparticles. The application of imprinted-RGO@BMNDs sensor was explored for trace level detection of PZA (Limit of detection = 6.65 pg L(-1), S/N = 3), which is a drug used for the cure of Tuberculosis. This is lowest detection limit reported so far for the detection of PZA. The sensor is highly selective, cost-effective, simple and free from any interfering effect. The real time application of the sensor was explored by successful detection of PZA in pharmaceutical and human blood serum, plasma and urine samples.
Collapse
|
19
|
Effect of Sodium Salicylate on the Viscoelastic Properties and Stability of Polyacrylate-Based Hydrogels for Medical Applications. INT J POLYM SCI 2016. [DOI: 10.1155/2016/5614687] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Investigation was made into the effect exerted by the presence of sodium salicylate (0–2 wt.%), in Carbomer-based hydrogel systems, on processing conditions, rheological and antimicrobial properties in tests against Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacterial strains, and examples of yeast (Candida albicans) and mould (Aspergillus niger). In addition, the work presents an examination of long-term stability by means of aging over one year the given hydrogels at 8°C and 25°C. The results show that 0.5 wt.% NaSal demonstrated a noticeable effect on the hydrogel neutralization process, viscosity, and antimicrobial properties against all of the tested microorganisms. The long-term stability studies revealed that hydrogels can maintain antimicrobial activity as well as viscosity to a degree that would be sufficient for practical use.
Collapse
|
20
|
Erol O, Unal HI. Core/shell-structured, covalently bonded TiO2/poly(3,4-ethylenedioxythiophene) dispersions and their electrorheological response: the effect of anisotropy. RSC Adv 2015. [DOI: 10.1039/c5ra20284a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Higher surface area, rod-to-rod interactions and conducting thin shell induced covalently-bonded core/shell nanorod-TiO2/PEDOT nanocomposite to show stronger ER activity and higher recovery after stress loading compared to particulate one.
Collapse
Affiliation(s)
- O. Erol
- Gazi University
- Chemistry Department
- Smart Materials Research Lab
- Ankara 06500
- Turkey
| | - H. I. Unal
- Gazi University
- Chemistry Department
- Smart Materials Research Lab
- Ankara 06500
- Turkey
| |
Collapse
|
21
|
Marins JA, Soares BG, Silva AA, Livi S. Silica prepared in the presence of alkylphosphonium-based ionic liquids and its performance in electrorheological fluids. RSC Adv 2014. [DOI: 10.1039/c4ra06666a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|