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Petal-Shaped Graphene Porous Films with Enhanced Absorption-Dominated Electromagnetic Shielding Performance and Mechanical Properties.
Guo, Nan; Liu, Jiahao; Xin, Siying; Du, Chongpeng; Liu, Jiaojiao; Zhang, Yusong; Xi, Yinshang; Wei, Renbo; Wang, Lingling; Li, Dong.
Afiliación
  • Guo N; School of Chemical Engineering, Northwest University, Xi'an 710069, China.
  • Liu J; The Research Center of Chemical Engineering Applying Technology for Resource of Shaanxi, Xi'an 710069, China.
  • Xin S; School of Chemical Engineering, Northwest University, Xi'an 710069, China.
  • Du C; The Research Center of Chemical Engineering Applying Technology for Resource of Shaanxi, Xi'an 710069, China.
  • Liu J; College of Chemistry, Sichuan University, Chengdu 611731, China.
  • Zhang Y; School of Chemical Engineering, Northwest University, Xi'an 710069, China.
  • Xi Y; The Research Center of Chemical Engineering Applying Technology for Resource of Shaanxi, Xi'an 710069, China.
  • Wei R; School of Chemical Engineering, Northwest University, Xi'an 710069, China.
  • Wang L; The Research Center of Chemical Engineering Applying Technology for Resource of Shaanxi, Xi'an 710069, China.
  • Li D; School of Chemical Engineering, Northwest University, Xi'an 710069, China.
ACS Appl Mater Interfaces ; 16(28): 36923-36934, 2024 Jul 17.
Article en En | MEDLINE | ID: mdl-38963067
ABSTRACT
The absorption-dominated graphene porous materials, considered ideal for mitigating electromagnetic pollution, encounter challenges related to intricate structural design. Herein, petal-like graphene porous films with dendritic-like and honeycomb-like pores are prepared by controlling the phase inversion process. The theoretical simulation and experimental results show that PVP K30 modified on the graphene surface via van der Waals interactions promotes graphene to be uniformly enriched on the pore walls. Benefiting from the regulation of graphene distribution and the construction of honeycomb pore structure, when 15 wt % graphene is added, the porous film exhibits absorption-dominated electromagnetic shielding performance, compared with the absence of PVP K30 modification. The total electromagnetic shielding effectiveness is 24.1 dB, an increase of 170%; the electromagnetic reflection coefficient reduces to 2.82 dB; The thermal conductivity reaches 1.1 W/(m K), representing a 104% increase. In addition, the porous film exhibits improved mechanical properties, the tensile strength increases to 6.9 MPa, and the elongation at break increases by 131%. The method adopted in this paper to control the enrichment of graphene in the pore walls during the preparation of honeycomb porous films by the phase inversion method can avoid the agglomeration of graphene and improve the overall performance of the porous graphene porous films.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Appl Mater Interfaces Asunto de la revista: BIOTECNOLOGIA / ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Appl Mater Interfaces Asunto de la revista: BIOTECNOLOGIA / ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos