标题: Mechanistic study on the swelling/solubilization behavior of EVA by NMP and BDG for efficient recycling of PV modules

作者: Zheng, PK (Zheng, Pengkun); Li, YX (Li, Yixin); Wang, HM (Wang, Haoming); Wu, HJ (Wu, Hongjie); Liu, HJ (Liu, Haojun); Li, JH (Li, Jiahao); Zhou, M (Zhou, Min); Hou, HB (Hou, Haobo)

来源出版物: JOURNAL OF CLEANER PRODUCTION 卷: 521 文献号: 146275 DOI: 10.1016/j.jclepro.2025.146275 Early Access Date: JUL 2025 Published Date: 2025 AUG 25

摘要: In the context of the global photovoltaic (PV) industry's current period of significant growth and development, the issue of the recycling of waste PV modules is becoming increasingly prominent. The chemical swelling method has been shown to be highly efficient and economical. The present study therefore investigates the swelling/solubilization behavior of NMP and BDG on EVA in PV modules, in order to advance the state of the art in this field. The experimental results show that at 100 degrees C and a liquid-solid ratio of 15 mL/g, the glass peeling time after NMP and BDG treatments are 40 and 30 min, respectively, and the back sheet peeling time is 41.67 and 30 min, respectively. Combined in situ infrared characterization shows that heating and the presence of competing molecules disrupt the cross-linked structure of EVA. Through theoretical calculations, it can be determined that the molecular polarity index and solubility parameters of BDG are closer to those of EVA, and it is found that there are mainly van der Waals forces and hydrogen bonding between BDG and EVA molecules, with stronger binding energy. Furthermore, the simulated diffusion behavior of the two solvents during EVA dissolution demonstrated that the diffusion of NMP and BDG exhibited sub-diffusive characteristics. This finding suggests that the dissolution/dissolution of BDG on EVA is more benign and contributes to the establishment of an environmentally sustainable recycling process. This study provides a theoretical basis for the optimization of the recycling process of PV modules.

作者关键词: Waste PV modules; EVA; Swelling/solubilization; Separation efficiency; Recycling process

KeyWords Plus: SILICON PHOTOVOLTAIC MODULES; MOLECULAR-ORBITAL METHODS; CALF THYMUS DNA; CROSS-LINKING; WATER; SEPARATION; DENSITY; ENERGY; FOCUS

地址: [Zheng, Pengkun; Li, Yixin; Wang, Haoming; Wu, Hongjie; Liu, Haojun; Li, Jiahao; Zhou, Min; Hou, Haobo] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.

[Li, Jiahao; Zhou, Min; Hou, Haobo] Wuhan Univ, Zhaoqing Inst Resources & Environm Technol, Zhaoqing 526200, Guangdong, Peoples R China.

通讯作者地址: Li, JH; Hou, HB (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.

Li, JH; Hou, HB (通讯作者)，Wuhan Univ, Zhaoqing Inst Resources & Environm Technol, Zhaoqing 526200, Guangdong, Peoples R China.

电子邮件地址: jiahao-li@whu.edu.cn; houhb@whu.edu.cn

影响因子：10