Electromechanical response of multilayer graphene sheet/polypropylene nanocomposites and its relationship with the graphene sheet physicochemical properties

IF 3.7 3区材料科学 Q1 INSTRUMENTS & INSTRUMENTATION

Smart Materials and Structures Pub Date : 2024-08-29 DOI:10.1088/1361-665x/ad70e5

C Medina, H Canché, A I Oliva-Avilés, F Avilés

{"title":"Electromechanical response of multilayer graphene sheet/polypropylene nanocomposites and its relationship with the graphene sheet physicochemical properties","authors":"C Medina, H Canché, A I Oliva-Avilés, F Avilés","doi":"10.1088/1361-665x/ad70e5","DOIUrl":null,"url":null,"abstract":"The mechanical, electrical, and piezoresistive responses of multilayer graphene sheet (GS)/polypropylene (PP) nanocomposites are investigated using four GSs of distinctive physicochemical properties. It is found that the morphology of the interconnected network of GS agglomerates at the mesoscale governs the mechanical, electrical, and electro-mechanical (piezoresistive) properties of the PP nanocomposites. The morphology of the mesoscale network of electroconductive fillers governs the effective properties of the nanocomposite. This network morphology strongly depends on the GS lateral size, dispersion, agglomeration, and, to a lesser extent, the specific surface area of the GSs. Within the range of lateral sizes investigated herein (1–21 <italic toggle=\"yes\">μ</italic>m), larger GSs yields nanocomposites with higher electrical conductivity. On the other hand, GSs of moderate lateral size (∼6.5 <italic toggle=\"yes\">μ</italic>m) and specific surface area of ∼141 m<sup>2</sup> g<sup>−1</sup> render GS/PP nanocomposites with a more dispersed and more sparsely interconnected network. This better dispersed network with agglomerates of smaller dimensions is concomitant with improved stiffness and strength, and higher gauge factors (∼18.2) for this GS/PP nanocomposites. Excellent capabilities for detection of human motion were proved for these nanocomposites.","PeriodicalId":21656,"journal":{"name":"Smart Materials and Structures","volume":null,"pages":null},"PeriodicalIF":3.7000,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Smart Materials and Structures","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1088/1361-665x/ad70e5","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"INSTRUMENTS & INSTRUMENTATION","Score":null,"Total":0}

引用次数: 0

Abstract

The mechanical, electrical, and piezoresistive responses of multilayer graphene sheet (GS)/polypropylene (PP) nanocomposites are investigated using four GSs of distinctive physicochemical properties. It is found that the morphology of the interconnected network of GS agglomerates at the mesoscale governs the mechanical, electrical, and electro-mechanical (piezoresistive) properties of the PP nanocomposites. The morphology of the mesoscale network of electroconductive fillers governs the effective properties of the nanocomposite. This network morphology strongly depends on the GS lateral size, dispersion, agglomeration, and, to a lesser extent, the specific surface area of the GSs. Within the range of lateral sizes investigated herein (1–21 μm), larger GSs yields nanocomposites with higher electrical conductivity. On the other hand, GSs of moderate lateral size (∼6.5 μm) and specific surface area of ∼141 m² g⁻¹ render GS/PP nanocomposites with a more dispersed and more sparsely interconnected network. This better dispersed network with agglomerates of smaller dimensions is concomitant with improved stiffness and strength, and higher gauge factors (∼18.2) for this GS/PP nanocomposites. Excellent capabilities for detection of human motion were proved for these nanocomposites.

查看原文本刊更多论文

多层石墨烯薄片/聚丙烯纳米复合材料的机电响应及其与石墨烯薄片理化特性的关系

本文使用四种具有不同物理化学特性的石墨烯，研究了多层石墨烯片（GS）/聚丙烯（PP）纳米复合材料的机械、电气和压阻响应。研究发现，中尺度石墨烯团聚体互连网络的形态决定了聚丙烯纳米复合材料的机械、电气和机电（压阻）性能。导电填料中尺度网络的形态决定了纳米复合材料的有效性能。这种网络形态在很大程度上取决于 GS 的横向尺寸、分散性、团聚性，在较小程度上也取决于 GS 的比表面积。在本文研究的横向尺寸范围内（1-21 微米），较大的 GS 可产生导电率更高的纳米复合材料。另一方面，横向尺寸适中（∼6.5 μm）、比表面积为 ∼141 m2 g-1 的 GS/PP 纳米复合材料具有更分散、更稀疏的互连网络。这种分散性更好、团聚体尺寸更小的网络提高了 GS/PP 纳米复合材料的刚度和强度，也提高了其测量系数（∼18.2）。事实证明，这些纳米复合材料具有出色的人体运动检测能力。

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

Smart Materials and Structures 工程技术-材料科学：综合

CiteScore

7.50

自引率

12.20%

发文量

317

审稿时长

3 months

期刊介绍： Smart Materials and Structures (SMS) is a multi-disciplinary engineering journal that explores the creation and utilization of novel forms of transduction. It is a leading journal in the area of smart materials and structures, publishing the most important results from different regions of the world, largely from Asia, Europe and North America. The results may be as disparate as the development of new materials and active composite systems, derived using theoretical predictions to complex structural systems, which generate new capabilities by incorporating enabling new smart material transducers. The theoretical predictions are usually accompanied with experimental verification, characterizing the performance of new structures and devices. These systems are examined from the nanoscale to the macroscopic. SMS has a Board of Associate Editors who are specialists in a multitude of areas, ensuring that reviews are fast, fair and performed by experts in all sub-disciplines of smart materials, systems and structures. A smart material is defined as any material that is capable of being controlled such that its response and properties change under a stimulus. A smart structure or system is capable of reacting to stimuli or the environment in a prescribed manner. SMS is committed to understanding, expanding and dissemination of knowledge in this subject matter.