{"title":"通过聚酰胺酸焊接和协同作用为聚二甲基硅氧烷复合材料构建机械强度高、导热性强的石墨烯骨架","authors":"Jianqiang Wang, Weijie Li, Xinya Zhang","doi":"10.1007/s42114-024-00882-x","DOIUrl":null,"url":null,"abstract":"<p>Graphene skeletons have great potential for thermal management. However, their practical applications are usually limited by their low thermal conductivity (λ) due to their low density and undesirable contact efficiency between graphene nanoplatelets (GNPs). Here, a high-density, anisotropic skeleton was constructed from polyamide acid/graphene oxide/graphene nanoplatelets (PAA/GO/GNPs) hybrid dispersion by PAA welding and syneresis. Notably, the mechanical strength and thermal conductivity of the skeletons were significantly enhanced by the carbonized PAA. The internal structure of skeletons was regulated by adjusting the driving force and resistance (PAA and GNPs content) during syneresis. When the concentrations of PAA and GNP in the precursor dispersion are 20 mg/ml and 100 mg/ml, the skeleton maintains the anisotropic structure after syneresis, while its density and axial thermal conductivity (λ<sub>axial</sub>) is 0.1701 g/cm³ and 3.104 W/(m·K). Moreover, the strength of the as-prepared skeleton is up to 1.64 MPa at 50% strain. With filling polydimethylsiloxane (PDMS) into the as-prepared skeletons, the λ<sub>axial</sub> of the obtained thermal interface materials (TIMs) is 4.421 W/(m·K). Therefore, this work provides a facile strategy for fabricating mechanically strong and highly thermally conductive graphene skeletons as well as TIMs.</p>","PeriodicalId":7220,"journal":{"name":"Advanced Composites and Hybrid Materials","volume":null,"pages":null},"PeriodicalIF":23.2000,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A mechanically strong and highly thermally conductive graphene skeleton constructed by polyamide acid welding and syneresis for polydimethylsiloxane composites\",\"authors\":\"Jianqiang Wang, Weijie Li, Xinya Zhang\",\"doi\":\"10.1007/s42114-024-00882-x\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Graphene skeletons have great potential for thermal management. However, their practical applications are usually limited by their low thermal conductivity (λ) due to their low density and undesirable contact efficiency between graphene nanoplatelets (GNPs). Here, a high-density, anisotropic skeleton was constructed from polyamide acid/graphene oxide/graphene nanoplatelets (PAA/GO/GNPs) hybrid dispersion by PAA welding and syneresis. Notably, the mechanical strength and thermal conductivity of the skeletons were significantly enhanced by the carbonized PAA. The internal structure of skeletons was regulated by adjusting the driving force and resistance (PAA and GNPs content) during syneresis. When the concentrations of PAA and GNP in the precursor dispersion are 20 mg/ml and 100 mg/ml, the skeleton maintains the anisotropic structure after syneresis, while its density and axial thermal conductivity (λ<sub>axial</sub>) is 0.1701 g/cm³ and 3.104 W/(m·K). Moreover, the strength of the as-prepared skeleton is up to 1.64 MPa at 50% strain. With filling polydimethylsiloxane (PDMS) into the as-prepared skeletons, the λ<sub>axial</sub> of the obtained thermal interface materials (TIMs) is 4.421 W/(m·K). Therefore, this work provides a facile strategy for fabricating mechanically strong and highly thermally conductive graphene skeletons as well as TIMs.</p>\",\"PeriodicalId\":7220,\"journal\":{\"name\":\"Advanced Composites and Hybrid Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":23.2000,\"publicationDate\":\"2024-04-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Advanced Composites and Hybrid Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1007/s42114-024-00882-x\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, COMPOSITES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Composites and Hybrid Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s42114-024-00882-x","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, COMPOSITES","Score":null,"Total":0}
A mechanically strong and highly thermally conductive graphene skeleton constructed by polyamide acid welding and syneresis for polydimethylsiloxane composites
Graphene skeletons have great potential for thermal management. However, their practical applications are usually limited by their low thermal conductivity (λ) due to their low density and undesirable contact efficiency between graphene nanoplatelets (GNPs). Here, a high-density, anisotropic skeleton was constructed from polyamide acid/graphene oxide/graphene nanoplatelets (PAA/GO/GNPs) hybrid dispersion by PAA welding and syneresis. Notably, the mechanical strength and thermal conductivity of the skeletons were significantly enhanced by the carbonized PAA. The internal structure of skeletons was regulated by adjusting the driving force and resistance (PAA and GNPs content) during syneresis. When the concentrations of PAA and GNP in the precursor dispersion are 20 mg/ml and 100 mg/ml, the skeleton maintains the anisotropic structure after syneresis, while its density and axial thermal conductivity (λaxial) is 0.1701 g/cm³ and 3.104 W/(m·K). Moreover, the strength of the as-prepared skeleton is up to 1.64 MPa at 50% strain. With filling polydimethylsiloxane (PDMS) into the as-prepared skeletons, the λaxial of the obtained thermal interface materials (TIMs) is 4.421 W/(m·K). Therefore, this work provides a facile strategy for fabricating mechanically strong and highly thermally conductive graphene skeletons as well as TIMs.
期刊介绍:
Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field.
The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest.
Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials.
Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.