Preparation and characteristic of Ag nanoparticle modified expanded graphite for enhancing paraffin phase change material properties. Issue 10 (3rd October 2022)

• Record Type: Journal Article
• Authors: Wen, Ruilong; Wu, Maomao; Zhu, Jinmeng; Zhu, Shengbo; Chen, Weixing
• Is Part Of: Fullerenes, nanotubes and carbon nanostructures. Volume 30:Issue 10(2022)
• Page Start: 1046
• Page End: 1053
• Publication Date: 2022-10-03
• Subjects: Paraffin -- expanded graphite -- Ag nanoparticle -- thermal conductivity; Fullerenes -- Periodicals; Nanotubes -- Periodicals; Nanostructures -- Periodicals; 546.6812
• DOI: 10.1080/1536383X.2022.2066654
• Languages: English
• ISSNs: 1536-383X

Abstract

Abstract: Ag nanoparticles are a promising additive for enhancing the thermal conductivity of PCMs. In this study, a series high thermal conductive shape-stable composite phase change materials PCMs were prepared by absorbing the Paraffin (PW) into the Ag nanoparticles modified expanded graphite (Ag@EG). SEM and EDS results proved that Ag nanoparticles were uniformly modified onto EG. The XPS results for Ag@EG indicated that the valence state of Ag in the EG was mainly zero. The XRD and FT-IR results of Ag@EG/PW indicated that the composite PCMs (CPCMs) have good chemical compatibility. The PW capacity in all CPCMs reached upon 60% with the latent heat in the range of 124.4–112.2 J/g. The thermal conductivity of 3.9-AEP reached 3.98 W/m/K which was enhanced by 1890.0% and 170.3% compared with PW and 0-AEP, respectively. All CPCMs possessed good thermal stability and thermal reliability after 200 thermal cycles. This indicated that the form-stable composite PCMs of Ag@EG/PW were good candidate materials for thermal energy storage in solar energy storage systems.