STUDY ON COMPOSITE MODIFICATION AND UV AGING MECHANISM OF PCB ENCAPSULANT FILM

Zhang Yuanjuan; Shen Fuhua; Xu Jinbo; Zhang Lijun; Lin Huan

doi:10.19912/j.0254-0096.tynxb.2024-1212

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (11) : 272-279. DOI: 10.19912/j.0254-0096.tynxb.2024-1212

STUDY ON COMPOSITE MODIFICATION AND UV AGING MECHANISM OF PCB ENCAPSULANT FILM

Zhang Yuanjuan, Shen Fuhua, Xu Jinbo, Zhang Lijun, Lin Huan

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Abstract

With a composite film made of polyvinyl butyral, boron nitride, and carbon nanotubes as the study subject, artificial UV radiation experiments were conducted to investigate the two critical factors influencing the thermal conductivity of composite films： irradiation time and intensity. The transient electrothermal technology was used to measure the thermophysical properties of the film. The findings indicate that the composite film performs best at a mass ratio of carbon nanotubes to boron nitride of 5:5. The thermal conductivity of the composite film still approaches 0.26 W/（m·K） at a UV radiation intensity of 10 W/m². The material’s internal structure starts to break down and deteriorate as the radiation duration increases. In order to investigate the UV aging mechanism of the composite adhesive film and the effects of cross-linking and degradation reactions on the material thermal properties, alterations in the characteristic peaks of the samples pre- and post-UV irradiation were analyzed using solution-state NMR.

Key words

photovoltaic modules / thermal conductivity / UV radiation / encapsulatnt film / composite modification thermal properties / transient electrothermal technology

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Zhang Yuanjuan, Shen Fuhua, Xu Jinbo, Zhang Lijun, Lin Huan. STUDY ON COMPOSITE MODIFICATION AND UV AGING MECHANISM OF PCB ENCAPSULANT FILM[J]. Acta Energiae Solaris Sinica. 2025, 46(11): 272-279 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1212

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