High Field Dielectric Properties of Silk Fibroin Films

Si-qi Wang; Jie Chen; Ying-ke Zhu; Ping-kai Jiang; Xing-yi Huang

doi:10.11777/j.issn1000-3304.2021.21037

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High Field Dielectric Properties of Silk Fibroin Films

Research Article | 更新时间：2023-05-22

- High Field Dielectric Properties of Silk Fibroin Films
- ACTA POLYMERICA SINICA Vol. 52, Issue 9, Pages: 1148-1155(2021)
- 作者机构：
  
  上海交通大学上海市电气绝缘与热老化重点实验室上海 200240
- 作者简介：
  
  Xing-yi Huang, E-mail: xyhuang@sjtu.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2021.21037
  CLC：
- Published：20 September 2021，
  
  Published Online：30 June 2021，
  
  Received：01 February 2021，
  
  Revised：26 February 2021，
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王思琦,陈杰,朱荧科等.丝素蛋白膜在高电场下的介电性能[J].高分子学报,2021,52(09):1148-1155.

Wang Si-qi,Chen Jie,Zhu Ying-ke,et al.High Field Dielectric Properties of Silk Fibroin Films[J].ACTA POLYMERICA SINICA,2021,52(09):1148-1155.
王思琦,陈杰,朱荧科等.丝素蛋白膜在高电场下的介电性能[J].高分子学报,2021,52(09):1148-1155. DOI： 10.11777/j.issn1000-3304.2021.21037.

Wang Si-qi,Chen Jie,Zhu Ying-ke,et al.High Field Dielectric Properties of Silk Fibroin Films[J].ACTA POLYMERICA SINICA,2021,52(09):1148-1155. DOI： 10.11777/j.issn1000-3304.2021.21037.

摘要

丝素蛋白的分子结构兼具软段和硬段，且其结构单元具有较大的偶极矩(3.5D)，在介电储能领域可能具有应用潜力. 本文表征了丝素蛋白薄膜的在高电场下的介电性能，并研究了丝素蛋白的分子结构与高电场下介电性能的关系. 结果显示，丝素蛋白的二级结构变化与其高场介电行为关系密切，

-折叠结构增加有利于提高击穿强度，降低介电损耗. 通过调整薄膜的制备工艺优化了丝素蛋白薄膜的高场介电性能，优化后的丝素蛋白膜在500 MV/m的电场下放电能量密度可达7.43 J/cm

，充-放电效率为79.8%. 本工作为开拓丝素蛋白在介电领域的应用提供了基础数据，并为进一步优化分子结构提供了参考.

Abstract

Silk fibroin shows promising potential in dielectric and electrical energy storage application since that its structure unit has a large dipole moment (3.5 D) and its molecular structure has both soft and hard segments. In this study

for the first time

the dielectric properties of silk fibroin film under high electrical fields are investigated and the emphasis is given on the relationship between secondary structures and dielectric properties under high electrical fields. The results show that under high electrical fields

the change in the secondary structures of the silk fibroin is closely associated with its dielectric behavior. Specifically

the increase of the

-sheet structure is beneficial for the electrical strength enhancement and suppressing the dielectric loss of silk fibroin film. In addition

the high-field dielectric properties are significantly boosted by optimizing the preparation process of the silk fibroin film. The optimized film has a discharge energy density of 7.43 J/cm

and a charge-discharge efficiency of 79.8% under an electrical field of 500 MV/m

which demonstrates a promissing energy storage capability. This work provides basic data for exploring the application of silk fibroin in the dielectric field and also gives reference for further optimization of molecular structure in the future.

关键词

丝素蛋白高电场介电性能储能性能

Keywords

Silk fibroinHigh electric fieldDielectric propertiesEnergy storage properties

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State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University

School of Materials Science and Engineering, Shenyang University of Technology

Department of Polymer Science and Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing

School of Chemistry and Chemical Engineering of Anhui University

西南科技大学环境友好能源材料国家重点实验室，材料与化学学院

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