Highly Thermally Conductive Aramid Nanofiber Composite Films with Synchronous Visible/Infrared Camouflages and Information Encryption.

Han, Yixin; Ruan, Kunpeng; He, Xiaoyu; Tang, Yusheng; Guo, Hua; Guo, Yongqiang; Qiu, Hua; Gu, Junwei

Han, Yixin; Ruan, Kunpeng; He, Xiaoyu; Tang, Yusheng; Guo, Hua; Guo, Yongqiang; Qiu, Hua; Gu, Junwei.

Afiliación

Han Y; Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China.
Ruan K; Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China.
He X; Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China.
Tang Y; Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China.
Guo H; Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China.
Guo Y; Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China.
Qiu H; Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China.
Gu J; Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China.

Angew Chem Int Ed Engl ; 63(17): e202401538, 2024 Apr 22.

Article en En | MEDLINE | ID: mdl-38334210

ABSTRACT

ABSTRACT

The development of highly thermally conductive composites that combine visible light/infrared camouflage and information encryption has been endowed with great significance in facilitating the application of 5G communication technology in military fields. This work uses aramid nanofibers (ANF) as the matrix, hetero-structured silver nanowires@boron nitride nanosheets (AgNWs@BNNS) prepared by in situ growth as fillers, which are combined to fabricate sandwich structured thermally conductive and electrically insulating (BNNS/ANF)-(AgNWs@BNNS)-(BNNS/ANF) (denoted as BAB) composite films by "filtration self-assembly, air spraying, and hot-pressing" method. When the mass ratio of AgNWs@BNNS to BNNS is 1 1 and the total mass fraction is 50âwt %, BAB composite film has the maximum in-plane thermal conductivity coefficient (λâ¥ of 10.36âW/(m â K)), excellent electrical insulation (breakdown strength and volume resistivity of 41.5âkV/mm and 1.21×1015âΩ â cm, respectively) and mechanical properties (tensile strength of 170.9âMPa). 50âwt % BAB composite film could efficiently reduce the equilibrium temperature of the central processing unit (CPU) working at full power, resulting in 7.0 °C lower than that of the CPU solely integrated with ANF directly. In addition, BAB composite film boasts adaptive visible light/infrared dual camouflage properties on cement roads and jungle environments, as well as the function of fast encryption of QR code information within 24 seconds.

Palabras clave

Information encryption; Sandwich structure; Thermally conductive composite films; Visible light/infrared camouflage

Texto completo

Imprimir

XML

PubMed Links

Buscar en Google