Changes over time in ferroelectricity of nanocomposites containing cellulose combined with [NH4][Zn(HCOO)3]

IF 1.5 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Philosophical Magazine Pub Date : 2023-08-24 DOI:10.1080/14786435.2023.2248456

H. Nguyen

{"title":"Changes over time in ferroelectricity of nanocomposites containing cellulose combined with [NH4][Zn(HCOO)3]","authors":"H. Nguyen","doi":"10.1080/14786435.2023.2248456","DOIUrl":null,"url":null,"abstract":"ABSTRACT For the first time, a composite based on a ferroelectric metal-organic framework of [NH4][Zn(HCOO)3] combined with nanocellulose at different cellulose concentrations from 0 to 75 wt% was synthesised to investigate the changes over time in phase transition and ferroelectric switching. A comparative study for fresh samples and the samples after 288 h was conducted. Electrophysical parameters were measured in a temperature range of 140 to 245 K under a weak electric field with an amplitude of 2 V.cm−1 at a frequency of 1 kHz. The results indicated that the increase in cellulose content led to increasing the phase transition temperature from 190.1 to 238.5 K. Besides, the coercive field was also found to increase from 3.78 to 14.12 kV.cm−1 along with the reduction of dielectric permittivity and maximum polarisation. After 288 h, this phase transition decreased significantly over time even to 231.6 K in the case of highest cellulose content (75 wt%). Meanwhile, the coercive field was found to decrease from 14.12 to 10.57 kV.cm−1. Remarkable changes were detected for samples with cellulose content of higher 25 wt%. The weaker interaction between ferroelectric part and cellulose over time due to the softness of cellulose was responsible for the obtained phenomena.","PeriodicalId":19856,"journal":{"name":"Philosophical Magazine","volume":"36 1","pages":"1999 - 2012"},"PeriodicalIF":1.5000,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Philosophical Magazine","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1080/14786435.2023.2248456","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

ABSTRACT For the first time, a composite based on a ferroelectric metal-organic framework of [NH4][Zn(HCOO)3] combined with nanocellulose at different cellulose concentrations from 0 to 75 wt% was synthesised to investigate the changes over time in phase transition and ferroelectric switching. A comparative study for fresh samples and the samples after 288 h was conducted. Electrophysical parameters were measured in a temperature range of 140 to 245 K under a weak electric field with an amplitude of 2 V.cm−1 at a frequency of 1 kHz. The results indicated that the increase in cellulose content led to increasing the phase transition temperature from 190.1 to 238.5 K. Besides, the coercive field was also found to increase from 3.78 to 14.12 kV.cm−1 along with the reduction of dielectric permittivity and maximum polarisation. After 288 h, this phase transition decreased significantly over time even to 231.6 K in the case of highest cellulose content (75 wt%). Meanwhile, the coercive field was found to decrease from 14.12 to 10.57 kV.cm−1. Remarkable changes were detected for samples with cellulose content of higher 25 wt%. The weaker interaction between ferroelectric part and cellulose over time due to the softness of cellulose was responsible for the obtained phenomena.

查看原文本刊更多论文

纤维素与[NH4][Zn(HCOO)3]复合纳米材料铁电性随时间的变化

本文首次合成了一种基于铁电金属-有机骨架[NH4][Zn(HCOO)3]与不同浓度(0 ~ 75% wt%)的纳米纤维素结合的复合材料，以研究其相变和铁电开关随时间的变化。对新鲜样品和288 h后的样品进行对比研究。在温度范围为140 ~ 245k、振幅为2v的弱电场条件下测量了电物理参数。cm−1，频率为1khz。结果表明，纤维素含量的增加导致相变温度由190.1 K提高到238.5 K。此外，顽压场也从3.78 kV增加到14.12 kV。Cm−1同时降低介电常数和最大极化。288 h后，随着时间的推移，这种相变显著下降，甚至在纤维素含量最高(75% wt%)的情况下达到231.6 K。同时，发现矫顽力场从14.12减小到10.57 kV.cm−1。对于纤维素含量高于25%的样品，检测到显著的变化。随着时间的推移，由于纤维素的柔软性，铁电部分与纤维素之间的相互作用减弱，这是造成上述现象的原因。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Philosophical Magazine 工程技术-材料科学：综合

自引率

0.00%

发文量

审稿时长

4.7 months

期刊介绍： The Editors of Philosophical Magazine consider for publication contributions describing original experimental and theoretical results, computational simulations and concepts relating to the structure and properties of condensed matter. The submission of papers on novel measurements, phases, phenomena, and new types of material is encouraged.