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Chen L, Ji X, Yan H, Wang L, Lin Y, Wang B, Hao C. Preparation of layered carbon nitride/titanium-based metal skeleton materials and study on their electrorheological properties. SOFT MATTER 2024; 21:87-99. [PMID: 39629584 DOI: 10.1039/d4sm01247j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2024]
Abstract
Background: as an intelligent material, electrorheological fluids (ERFs) comprise a suspension system consisting of dielectric particles and/or their composites dispersed in an insulating liquid. In this article, MOF/g-C3N4 composite nanoparticles were successfully synthesized and demonstrated an excellent ER effect. Methods: first, the precursor for g-C3N4 was synthesized using a high-temperature calcination method, followed by the in situ synthesis of MIL-125 (MOF-Ti) on the surface of layered graphitic carbon nitride using a solvothermal approach. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses were used to reveal the presence of numerous MOF particles deposited onto the surfaces of layered g-C3N4 nanosheets. X-ray powder diffraction confirmed the growth of MOF particles on the g-C3N4 precursor. The chemical composition and states were characterized through Fourier-transform infrared (FT-IR) spectroscopy and X-ray photoelectron (XPS) analyses. Additionally, BET analysis indicated the presence of abundant pore structures in the MOF/g-C3N4 composite nanoparticles. Results: lastly, rheological and dielectric properties were investigated. The ER behavior demonstrated their excellent performance, with a 10 wt% mass fraction suspension of the MOF/g-C3N4-0.4 based composite material and dimethyl silicone oil exhibiting a yield stress of 300 Pa at 2 kV mm-1.
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Affiliation(s)
- Liangkun Chen
- College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China.
| | - Xiang Ji
- College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China.
| | - Haochun Yan
- College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China.
| | - Liyue Wang
- College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China.
| | - Yusheng Lin
- College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China.
| | - Baoxiang Wang
- College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China.
| | - Chuncheng Hao
- College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China.
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Kuznetsov NM, Zakharevich AA, Vdovichenko AY, Kovaleva VV, Zagoskin YD, Bakirov AV, Malakhov SN, Grigoriev TE, Chvalun SN. Highly Porous Particles of Cellulose Derivatives for Advanced Applications. Chempluschem 2024; 89:e202400375. [PMID: 39073319 DOI: 10.1002/cplu.202400375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2024] [Revised: 07/22/2024] [Accepted: 07/28/2024] [Indexed: 07/30/2024]
Abstract
A chemical modification of cellulose diacetate by phthalate and nitrate was performed to increase solubility in organic solvents and change the electrical properties. The role of substituents on the conductivity, permittivity, and polarizability of cellulose films is revealed. It has been shown that highly porous micro particles can be obtained from cellulose derivatives by a simple and technological freeze-drying method. The resulting micro sized aerogels have a predominantly spherical morphology and amorphous structure. Suspensions of porous particles of nitro- and phthalylated cellulose derivatives in silicone oil have an increased dielectric permittivity compared to cellulose diacetate particles. Produced particles are novel promising material with tunable electrical properties for advanced applications in composites, including for electrorheological fluids.
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Affiliation(s)
- Nikita M Kuznetsov
- National Research Center ", Kurchatov Institute", 1, Akademika Kurchatova Pl., Moscow, 123182, Russia
| | - Anastasia A Zakharevich
- National Research Center ", Kurchatov Institute", 1, Akademika Kurchatova Pl., Moscow, 123182, Russia
| | - Artem Yu Vdovichenko
- National Research Center ", Kurchatov Institute", 1, Akademika Kurchatova Pl., Moscow, 123182, Russia
- Enikolopov Institute of Synthetic Polymeric Materials of Russian Academy of Sciences, 70, Profsoyuznaya ul., Moscow, 117393, Russia
| | - Victoria V Kovaleva
- National Research Center ", Kurchatov Institute", 1, Akademika Kurchatova Pl., Moscow, 123182, Russia
| | - Yuriy D Zagoskin
- National Research Center ", Kurchatov Institute", 1, Akademika Kurchatova Pl., Moscow, 123182, Russia
| | - Artem V Bakirov
- National Research Center ", Kurchatov Institute", 1, Akademika Kurchatova Pl., Moscow, 123182, Russia
- Enikolopov Institute of Synthetic Polymeric Materials of Russian Academy of Sciences, 70, Profsoyuznaya ul., Moscow, 117393, Russia
| | - Sergey N Malakhov
- National Research Center ", Kurchatov Institute", 1, Akademika Kurchatova Pl., Moscow, 123182, Russia
| | - Timofei E Grigoriev
- National Research Center ", Kurchatov Institute", 1, Akademika Kurchatova Pl., Moscow, 123182, Russia
| | - Sergei N Chvalun
- National Research Center ", Kurchatov Institute", 1, Akademika Kurchatova Pl., Moscow, 123182, Russia
- Enikolopov Institute of Synthetic Polymeric Materials of Russian Academy of Sciences, 70, Profsoyuznaya ul., Moscow, 117393, Russia
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Wang Y, Ma R, Nie W, Zhao X, Yin J. Enhanced Electrorheological Performance of Core-Shell-Structured Polymerized Ionic Liquid@Doubly Polymerized Ionic Liquid Microspheres Prepared via Evaporation-Assisted Dispersion Polymerization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:14006-14014. [PMID: 37738145 DOI: 10.1021/acs.langmuir.3c01745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/24/2023]
Abstract
A polymerized ionic liquid (PIL) provides a platform for the development of a high-performance water-free polyelectrolyte-based electrorheological fluid (ERF) because of the presence of large-size hydrophobic ion pairs. However, the large-size hydrophobic ion pairs also easily result in a low glass-transition temperature of an ordinary linear PIL, and consequently, the PIL-based ERF has to be subject to a high leaking current density and a narrow working temperature range. In this paper, we prepared a kind of core-shell-structured polymerized ionic liquid@doubly polymerized ionic liquid (PIL@D-PIL) microsphere with a linear PIL as the core and a physically cross-linked D-PIL as the shell via an evaporation-assisted dispersion polymerization method. The core-shell structure of the sample was observed by scanning electron microscopy and transmission electron microscopy. The thermal properties of the sample were tested by differential scanning calorimetery and thermogravimetric analysis. The ER effect and dielectric polarization of PIL@D-PIL microspheres when dispersed in an insulating nonpolar liquid were studied by a rheometer and dielectric spectroscopy. It shows that the glass-transition temperature and thermal stability of a PIL increased after coating with the D-PIL shell. Under electric fields, the ERF of the PIL@D-PIL microspheres exhibits a significantly reduced leaking current density and an enhanced operating temperature range compared to the ERF of single-PIL microspheres. The PIL@D-PIL microspheres can still maintain good ER effect even if the temperature is higher than the glass-transition point of the PIL core due to the protection of the D-PIL shell.
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Affiliation(s)
- Yudong Wang
- Smart Materials Laboratory, Department of Applied Physics, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, Shaanxi 710129, China
| | - Ruijing Ma
- Smart Materials Laboratory, Department of Applied Physics, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, Shaanxi 710129, China
| | - Wuyang Nie
- Smart Materials Laboratory, Department of Applied Physics, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, Shaanxi 710129, China
| | - Xiaopeng Zhao
- Smart Materials Laboratory, Department of Applied Physics, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, Shaanxi 710129, China
| | - Jianbo Yin
- Smart Materials Laboratory, Department of Applied Physics, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, Shaanxi 710129, China
- Shaanxi Basic Discipline (Liquid Physics) Research Center, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, Shaanxi 710129, China
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Liu Y, Zhao X, Yin J. Enhanced electro-responsive electrorheological efficiency of polyethylene oxide-intercalated montmorillonite nanocomposite suspension. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
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Selective separation and purification of ReO4- by temperature-sensitive imprinted polymer with porous interconnected network structure. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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