文献类型：期刊文献

英文题名：High breakdown strength and outstanding piezoelectric performance in flexible PVDF based percolative nanocomposites through the synergistic effect of topological-structure and composition modulations

作者：Yang, Lu[1,2];Zhao, Qiuying[2];Hou, Ying[3];Sun, Rujie[4];Cheng, Meng[2];Shen, Mingxia[1];Zeng, Shaohua[1];Ji, Hongli[2,5];Qiu, Jinhao[2,5]

机构：[1]Hohai Univ, Coll Mech & Mat, Nanjing 210098, Jiangsu, Peoples R China;[2]Nanjing Univ Aeronaut & Astronaut, State Key Lab Mech & Control Mech Struct, Nanjing 210016, Jiangsu, Peoples R China;[3]East China Univ Sci & Technol, Dept Phys, Coll Sci, Shanghai 200237, Peoples R China;[4]Univ Bristol, Bristol Composites Inst ACCIS, Bristol BS8 1TR, Avon, England;[5]Nanjing Univ Aeronaut & Astronaut, Coll Aerosp Engn, Nanjing 210016, Jiangsu, Peoples R China

年份：2018

卷号：114

起止页码：13

外文期刊名：COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING

收录：;EI(收录号：20183305700575);WOS:【SCI-EXPANDED(收录号:WOS:000450019200002)】；

基金：This work was supported by the Fundamental Research Funds for the Central Universities (Grant No. 2017B06014), Major State Basic Research Development Program of China (973 Program, Grant No. 2015CB057501), Research Fund of State Key Laboratory of Mechanics and Control of Mechanical Structures (Nanjing University of Aeronautics and astronautics) (Grant No. MCMS-0518Y01), Chenguang Talent Foundation of Shanghai Education and Development Committee (Contract No. 14CG28), Fundamental Research Funds for the Central Universities (Grant No. 2018B40814) and Natural Science Foundation of Jiangsu Province (Grant No. BK20150061).

语种：英文

外文关键词：Nanocomposites; Sandwich structures; Electrical properties

摘要：Over decades, the fabrication of flexible poly(vinylidene fluoride) (PVDF) based percolative nanocomposites with high piezoelectric performance is of great concern from both academia and industry. However, the issue of sharply declined breakdown strength in percolative nanocomposites poses an obstacle to realizing the full potential of conductive nanofillers in enhancing piezoelectricity. Herein, we demonstrated that through proper topological structure and composition modulations, notably improved breakdown strength and piezoelectric performance can be achieved in PVDF based percolative nanocomposites. By constructing a sandwiched structure where a layer of high breakdown strength is intercalated between layers containing high content (near percolation threshold) of conductive nanofillers, the breakdown strength of overall nanocomposites is significantly strengthened and thus allows for sufficient poling of outer layers, fulfilling the great potential of conductive nanofillers in yielding piezoelectricity enhancement. A super high piezoelectric coefficient d(33) of 48 pC/N is obtained in the optimized sandwich nanocomposites.