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Towards high efficient nanodielectrics from linear ferroelectric P(VDF-TrFE-CTFE)-g-PMMA matrix and exfoliated mica nanosheets Scopus
期刊论文 | 2019 , 469 , 437-445 | Applied Surface Science
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Abstract :

© 2018 Poly(vinylidene fluoride) (PVDF) based polymer/ceramic nanocomposites for high energy density dielectrics have long been plagued by their low discharging efficiency (40–60%), which originates from the matrix with high bulk ferroelectric relaxation and the high-k ceramics with large conduction loss. In this work, a linear-like PVDF-based polymer dielectric is synthesized through grafting poly(methyl methacrylate) (PMMA) onto main chains of poly(vinyl fluoride-trifluoroethylene-chlorotrifluoroethylene) (P(VDF-TrFE-CTFE)) terpolymer via an atom transfer radical polymerization (ATRP) process. PMMA grafted terpolymer (P(VDF-TrFE-CTFE)-g-PMMA) shows linear-like dielectric characteristics accompanied with greatly enhanced discharging efficiency of ∼80% under 250 MV/m, which is over 100% higher than that of pristine terpolymer. To further improve its breakdown strength and discharging efficiency, the grafted terpolymer are then compounded with ultrasonic-exfoliated mica nanosheets (eMica) by solution-cast method. Thanks to the low hysteresis loss of linear-like dielectric matrix and the high insulating 2D mica nanosheets, the composite with the highest discharging efficiency of ∼78% under 250 MV/m is achieved. The maximum energy density of the optimized composite reaches 9.6 J/cm3, which is nearly 290% that of the pristine terpolymer. Besides, its discharging efficiency is about 74% under 450 MV/m, which is much more advantageous than the other PVDF-based polymer/ceramics composite dielectrics. This work suggests that utilizing polymer matrix with linear dielectric property and fillers with high insulating 2D structure might be a facile strategy to achieve composite dielectrics with simultaneously high energy density and high discharging efficiency.

Keyword :

Discharging efficiency Linear dielectric Mica Nanodielectrics P(VDF-TrFE-CTFE)

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GB/T 7714 Wang, Jian , Xie, Yunchuan , Liu, Jingjing et al. Towards high efficient nanodielectrics from linear ferroelectric P(VDF-TrFE-CTFE)-g-PMMA matrix and exfoliated mica nanosheets [J]. | Applied Surface Science , 2019 , 469 : 437-445 .
MLA Wang, Jian et al. "Towards high efficient nanodielectrics from linear ferroelectric P(VDF-TrFE-CTFE)-g-PMMA matrix and exfoliated mica nanosheets" . | Applied Surface Science 469 (2019) : 437-445 .
APA Wang, Jian , Xie, Yunchuan , Liu, Jingjing , Zhang, Zhicheng , Zhang, Yanfeng . Towards high efficient nanodielectrics from linear ferroelectric P(VDF-TrFE-CTFE)-g-PMMA matrix and exfoliated mica nanosheets . | Applied Surface Science , 2019 , 469 , 437-445 .
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Polymer-based Nanocomposite Dielectrics with High Energy Storage Capacity EI Scopus CSCD PKU
期刊论文 | 2017 , 43 (7) , 2234-2240 | Gaodianya Jishu/High Voltage Engineering
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Abstract :

As the core material of capacitors, dielectrics with high energy storage capacity have extremely important application in advanced equipment of smart grid and high-energy weapons. In order to improve the energy density of polymer dielectrics, composite technology was usually used to fabricate polymer-based nanocomposite dielectrics. We introduced the basic theory and structure model of several composites, and summarized recent research achievements from three key factors, including dielectric constant, electrical breakdown strength, and energy loss. Moreover, we put forward discussions and prospection on the basis of above scientific issues. © 2017, High Voltage Engineering Editorial Department of CEPRI. All right reserved.

Keyword :

Advanced equipment Breakdown strengths Composite technology Electrical breakdown strengths Energy storage capacity Polymer dielectrics Polymer-based nanocomposites Structure modeling

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GB/T 7714 Jiang, Wanrong , Xie, Yunchuan , Zhang, Zhicheng . Polymer-based Nanocomposite Dielectrics with High Energy Storage Capacity [J]. | Gaodianya Jishu/High Voltage Engineering , 2017 , 43 (7) : 2234-2240 .
MLA Jiang, Wanrong et al. "Polymer-based Nanocomposite Dielectrics with High Energy Storage Capacity" . | Gaodianya Jishu/High Voltage Engineering 43 . 7 (2017) : 2234-2240 .
APA Jiang, Wanrong , Xie, Yunchuan , Zhang, Zhicheng . Polymer-based Nanocomposite Dielectrics with High Energy Storage Capacity . | Gaodianya Jishu/High Voltage Engineering , 2017 , 43 (7) , 2234-2240 .
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Application of ATRP in the synthesis of hyperbranched polymers EI Scopus CSCD PKU
期刊论文 | 2010 , 26 (1) , 162-165 | Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering
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Hyperbranched polymer is a new kind of polymer material with characteristics which is different from that of linear polymers. Atom transfer radical polymerization (ATRP), as a living and controllable method, is playing an important role in the synthesis of hyperbranched polymers. Under the Cu(I) catalyst system, ATRP can catalyze AB* monomer and produce hyperbranched polymers, while synthesize amphiphilic macromolecules with 'core-shell' or other special structures by using multifunctional macromolecules as the initiator. This paper introduced hyperbranched polymers with various structures synthesized by ATRP in recent years and forecasted the future development of the application of ATRP in the synthesis of hyperbranched polymers.

Keyword :

Amphiphilic macromolecules Core shell Cu catalyst Hyperbranched polymers Linear polymers Polymer materials Special structure

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GB/T 7714 Hu, Shu-Jie , Yu, De-Mei , Xie, Yun-Chuan . Application of ATRP in the synthesis of hyperbranched polymers [J]. | Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering , 2010 , 26 (1) : 162-165 .
MLA Hu, Shu-Jie et al. "Application of ATRP in the synthesis of hyperbranched polymers" . | Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering 26 . 1 (2010) : 162-165 .
APA Hu, Shu-Jie , Yu, De-Mei , Xie, Yun-Chuan . Application of ATRP in the synthesis of hyperbranched polymers . | Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering , 2010 , 26 (1) , 162-165 .
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Injection molded plastic microfluidic biochips with integrated pumping electrode EI Scopus
会议论文 | 2010 , 1017-1020
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Abstract :

The plastic microfluidic biochip was successfully fabricated using micro-injection molding technique, and the gold sputtering was applied to fabricate the pumping electrode. Thermal-bonding technology was applied to integrate the microfluid and the pumping electrode. The experiment results show that the dimension of plastic microfluid biochip was in accordance with the nickel mold, which was fabricated by electroforming technology. The inner gas pressure of chamber, generated by electrolysis reaction under 20V, sharply increased enough to propel electrolytic solution to flow into microchannel. ©2010 IEEE.

Keyword :

Electrolysis reaction Electrolytic solution Gas pressures Injection molded plastic Micro fluidic biochips Micro-fluid Micro-injection molding Thermal bonding

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GB/T 7714 Huang, Long-Biao , Yung, Kai-Leung , Xu, Yan et al. Injection molded plastic microfluidic biochips with integrated pumping electrode [C] . 2010 : 1017-1020 .
MLA Huang, Long-Biao et al. "Injection molded plastic microfluidic biochips with integrated pumping electrode" . (2010) : 1017-1020 .
APA Huang, Long-Biao , Yung, Kai-Leung , Xu, Yan , Xie, Yun-Chuan . Injection molded plastic microfluidic biochips with integrated pumping electrode . (2010) : 1017-1020 .
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原子转移自由基聚合在超支化大分子合成中的应用进展 CSCD PKU
期刊论文 | 2010 , (1) , 162-165 | 高分子材料科学与工程
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Abstract :

超支化聚合物是一类具有不同于线性聚合物性质的新型高分子材料,原子转移自由基聚合(ATRP)作为一种活性可控聚合方法,在超支化聚合物合成领域发挥着重要的作用.ATRP在Cu(1)催化体系下不仅可以催化AB~*型单体生成超支化聚合物,而且还可以多官能团的大分子为引发剂,生成具有"核-壳"结构的两亲性共聚物或其它特殊结构大分子.文中主要介绍了近年来采用ATRP法合成的不同结构超支化聚合物,并对ATRP在超支化大分子合成中的应用前景进行了展望.

Keyword :

原子转移自由基聚合 超支化大分子 合成

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GB/T 7714 胡淑婕 , 于德梅 , 解云川 . 原子转移自由基聚合在超支化大分子合成中的应用进展 [J]. | 高分子材料科学与工程 , 2010 , (1) : 162-165 .
MLA 胡淑婕 et al. "原子转移自由基聚合在超支化大分子合成中的应用进展" . | 高分子材料科学与工程 1 (2010) : 162-165 .
APA 胡淑婕 , 于德梅 , 解云川 . 原子转移自由基聚合在超支化大分子合成中的应用进展 . | 高分子材料科学与工程 , 2010 , (1) , 162-165 .
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