Liquid crystalline structuring in dilute suspensions of high aspect ratio clay nanosheets

IF 2.2 4区化学 Q3 CHEMISTRY, PHYSICAL

Colloid and Polymer Science Pub Date : 2024-05-27 DOI:10.1007/s00396-024-05268-5

Osvaldo Trigueiro Neto, Sabine Rosenfeldt, Paulo Henrique Michels-Brito, Konstanse Kvalem Seljelid, Andrew Akanno, Bruno Telli Ceccato, Rini Padinjakkara Ravindranathan, Tomás S. Plivelic, Leander Michels, Josef Breu, Kenneth D. Knudsen, Jon Otto Fossum

{"title":"Liquid crystalline structuring in dilute suspensions of high aspect ratio clay nanosheets","authors":"Osvaldo Trigueiro Neto, Sabine Rosenfeldt, Paulo Henrique Michels-Brito, Konstanse Kvalem Seljelid, Andrew Akanno, Bruno Telli Ceccato, Rini Padinjakkara Ravindranathan, Tomás S. Plivelic, Leander Michels, Josef Breu, Kenneth D. Knudsen, Jon Otto Fossum","doi":"10.1007/s00396-024-05268-5","DOIUrl":null,"url":null,"abstract":"<p>Aqueous liquid suspensions of high aspect ratio 2D clay nanosheets were investigated using small angle X-ray scattering (SAXS). The high aspect ratio of synthetic fluorohectorite clays allows for investigation of liquid crystalline orientational order for relatively large nanosheet spacings, in the range which can produce structural coloration, thus providing two handles for determining the nanosheet spacings: SAXS and visible color. Various clay concentrations were investigated, and good agreement with previous work on structural coloration from such suspensions was obtained. Particular attention is given to the confinement caused by the container geometry, where both cylindrical and flat confinements were investigated. In both cases, the SAXS data suggest coherent regions that have a nematic inter-orientational distribution that surprisingly is linked to the container geometry, which apparently determines the efficiency of packing of the suspension. For both geometries, the analysis suggests that these coherent regions have a 1D lamellar periodic intra-structure with uniform nanosheet spacing determined by the clay concentration and a typical correlation length in the range of 200 to 500 nm.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\n","PeriodicalId":520,"journal":{"name":"Colloid and Polymer Science","volume":"21 1","pages":""},"PeriodicalIF":2.2000,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Colloid and Polymer Science","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1007/s00396-024-05268-5","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

Aqueous liquid suspensions of high aspect ratio 2D clay nanosheets were investigated using small angle X-ray scattering (SAXS). The high aspect ratio of synthetic fluorohectorite clays allows for investigation of liquid crystalline orientational order for relatively large nanosheet spacings, in the range which can produce structural coloration, thus providing two handles for determining the nanosheet spacings: SAXS and visible color. Various clay concentrations were investigated, and good agreement with previous work on structural coloration from such suspensions was obtained. Particular attention is given to the confinement caused by the container geometry, where both cylindrical and flat confinements were investigated. In both cases, the SAXS data suggest coherent regions that have a nematic inter-orientational distribution that surprisingly is linked to the container geometry, which apparently determines the efficiency of packing of the suspension. For both geometries, the analysis suggests that these coherent regions have a 1D lamellar periodic intra-structure with uniform nanosheet spacing determined by the clay concentration and a typical correlation length in the range of 200 to 500 nm.

Graphical abstract

Abstract Image

查看原文本刊更多论文

高纵横比粘土纳米片稀释悬浮液中的液晶结构

利用小角 X 射线散射 (SAXS) 对高纵横比二维粘土纳米片的水基液体悬浮液进行了研究。合成氟蛭石粘土的高纵横比允许研究相对较大纳米片间距的液体结晶取向顺序，在此范围内可产生结构着色，从而为确定纳米片间距提供了两种方法：SAXS 和可见光颜色。对各种粘土浓度进行了研究，结果与之前关于此类悬浮液结构着色的研究结果十分吻合。我们特别关注了容器几何形状造成的限制，对圆柱形和扁平限制进行了研究。在这两种情况下，SAXS 数据都显示出具有向列取向间分布的相干区域，令人惊讶的是，这种分布与容器的几何形状有关，而容器的几何形状显然决定了悬浮液的堆积效率。对于这两种几何形状，分析表明这些相干区域具有一维片状周期性内部结构，其均匀的纳米片间距由粘土浓度决定，典型的相关长度范围为 200 至 500 nm。

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

Colloid and Polymer Science 化学-高分子科学

CiteScore

4.60

自引率

4.20%

发文量

111

审稿时长

2.2 months

期刊介绍： Colloid and Polymer Science - a leading international journal of longstanding tradition - is devoted to colloid and polymer science and its interdisciplinary interactions. As such, it responds to a demand which has lost none of its actuality as revealed in the trends of contemporary materials science.