{"title":"Surface-Modified MXene/TLCP Nanocomposites with Enhanced Electrical and Thermal Conductivity via in Situ Grafting Polymerization","authors":"Shihang Dong, Shuohan Huang, Yuan Liang, Lingzhe Chen, Ying Wang, Yuhan Chen, Ke Ma, Xueqin Ju, Guanglei Xiang, Hai Wan, Wenbin Jin, Yanping Wang, Yong He, Peng Wei, Yumin Xia","doi":"10.1016/j.polymer.2025.128645","DOIUrl":null,"url":null,"abstract":"MXenes, an emerging class of two-dimensional transition metal carbides and nitrides, have garnered significant attention due to their exceptional electrical, thermal, and mechanical properties. However, achieving uniform dispersion of hydrophilic MXene nanosheets within a hydrophobic thermotropic liquid crystal polyester (TLCP) matrix presents a formidable challenge that limits their practical applications. In this study, we address this challenge through a direct surface modification approach to enhance the interfacial interaction between MXene and TLCP. The effects of modified MXene on TLCP performance were investigated through comprehensive material characterization. X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) analyses reveal that 6-aminohexanoic acid effectively mediates the interfacial interaction between MXene and TLCP molecules, preventing the aggregation of MXene nanosheets and facilitating their uniform dispersion throughout the TLCP matrix. The incorporation of modified MXene (Am-MXene) significantly enhances the thermal stability of the resulting nanocomposites, with the Am-50%MXene/TLCP demonstrating a 27°C increase in the 5% weight loss temperature compared to pristine TLCP. The nanocomposite achieves a notable electrical conductivity of 5.99 S/m while preserving the TLCP's intrinsic microstructure. Moreover, MXene incorporation enhances the orderliness and alignment of liquid crystal textures. The nanocomposite exhibits substantial improvements in thermal diffusivity (67%), thermal conductivity (25%), dielectric constant (318%), and photothermal conversion temperature (84%). These findings advance our understanding of designing multifunctional composite materials with enhanced performance characteristics.","PeriodicalId":405,"journal":{"name":"Polymer","volume":"15 1","pages":""},"PeriodicalIF":4.1000,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Polymer","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1016/j.polymer.2025.128645","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
引用次数: 0
Abstract
MXenes, an emerging class of two-dimensional transition metal carbides and nitrides, have garnered significant attention due to their exceptional electrical, thermal, and mechanical properties. However, achieving uniform dispersion of hydrophilic MXene nanosheets within a hydrophobic thermotropic liquid crystal polyester (TLCP) matrix presents a formidable challenge that limits their practical applications. In this study, we address this challenge through a direct surface modification approach to enhance the interfacial interaction between MXene and TLCP. The effects of modified MXene on TLCP performance were investigated through comprehensive material characterization. X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) analyses reveal that 6-aminohexanoic acid effectively mediates the interfacial interaction between MXene and TLCP molecules, preventing the aggregation of MXene nanosheets and facilitating their uniform dispersion throughout the TLCP matrix. The incorporation of modified MXene (Am-MXene) significantly enhances the thermal stability of the resulting nanocomposites, with the Am-50%MXene/TLCP demonstrating a 27°C increase in the 5% weight loss temperature compared to pristine TLCP. The nanocomposite achieves a notable electrical conductivity of 5.99 S/m while preserving the TLCP's intrinsic microstructure. Moreover, MXene incorporation enhances the orderliness and alignment of liquid crystal textures. The nanocomposite exhibits substantial improvements in thermal diffusivity (67%), thermal conductivity (25%), dielectric constant (318%), and photothermal conversion temperature (84%). These findings advance our understanding of designing multifunctional composite materials with enhanced performance characteristics.
期刊介绍:
Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics.
The main scope is covered but not limited to the following core areas:
Polymer Materials
Nanocomposites and hybrid nanomaterials
Polymer blends, films, fibres, networks and porous materials
Physical Characterization
Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films
Polymer Engineering
Advanced multiscale processing methods
Polymer Synthesis, Modification and Self-assembly
Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization
Technological Applications
Polymers for energy generation and storage
Polymer membranes for separation technology
Polymers for opto- and microelectronics.