环境工程学报2025，Vol.19Issue(5)：1166-1176,11.DOI:10.12030/j.cjee.202405033
硅烷偶联剂改性退役风电叶片再生纤维及其对石膏基材性能的影响
Characterises of recycled fiber from retired wind turbine blades modified by silane coupling agent and its effect on properties of gypsum
摘要
Abstract
The retired wind turbine blades from older wind farms and the replacement from smaller to larger turbines has resulted in a significant amount of waste wind power blades.However,the effective utilization of these blades is currently limited,and the cost of chemical recycling is considerable.This study investigated the potential of recycled fiber(RF)derived from retired wind turbine blades,which were processed through crushing,grinding,and sorting into three different sizes.The influence of RF dimensions,volume fraction,and surface modifiers on gypsum characteristics was investigated,and the interfacial bonding process between RF and gypsum paste was elucidated before and after modification.The results showed that as RF size increased,the amount of epoxy resin adhering to the RF surface rose from 30.0％to 75.0％.Consequently,the RF changed from hydrophilic to hydrophobic,with the contact angle increasing from 41° to 104°,reducing the interfacial bonding strength between the fiber and gypsum.As the quantity of RF was increased,the mechanical strength of gypsum initially rose,but subsequently declined.The addition of RF with a length of 0.60～1.18 mm and a volume content of 1.8％resulted in the maximum value of the absolute dry compressive strength,absolute dry flexural strength and softening coefficient of gypsum,reaching 40.2 MPa,13.2 MPa,and 0.54,respectively.These values were 4.1％,11.9％,and 10.2％higher than those of the control gypsum paste,respectively.After modification with a 1.0％silane coupling agent,the hydroxyl group on the RF surface would undergo a condensation reaction,resulting in a change from oleophilic to hydrophilic properties.This modification decreased the contact angle and enhanced the interfacial bonding with gypsum.Compared to unmodified RF gypsum,the absolute dry flexural strength,compressive strength,and softening coefficient increased by 20.1％,9.0％,and 5.6％,respectively.The results provide a theoretical basis for the recycling of retired wind turbine blades.关键词
退役风电叶片/再生纤维/高强石膏/硅烷偶联剂Key words
retired wind turbine blades/recycled fiber/high strength gypsum/silane coupling agent分类
资源环境引用本文复制引用
崔冉冉,王功勋,黄博,刘福财,肖敏,祝明桥..硅烷偶联剂改性退役风电叶片再生纤维及其对石膏基材性能的影响[J].环境工程学报,2025,19(5):1166-1176,11.基金项目
湖南省自然科学基金资助项目(2024JJ5159、2024JJ6217) （2024JJ5159、2024JJ6217）
湖南科技创新计划资助项目(2023SK2014) （2023SK2014）
湖南省教育厅科学研究项目(24A0350) （24A0350）
湖南省研究生科研创新资助项目(QL20230245) （QL20230245）
