用冻融回收法分离废弃风机叶片中的纤维树脂。

Khalil Ahmed, Xu Jiang, Ghazala Ashraf, Xuhong Qiang
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引用次数: 0

摘要

由于无法回收耐用的玻璃纤维增强环氧树脂复合材料,废弃风力涡轮机叶片的处理带来了越来越大的经济损失和环境问题。现有的热和化学回收方法往往需要高温和有毒化学品,导致材料降解。在这里,我们提出了一种新的基于冻融的纤维-树脂分离方法作为替代方案。该工艺只使用人类安全温度下的水,利用冰引起的膨胀来破坏玻璃纤维-环氧树脂界面。显微成像和重量分析显示界面分离明显,三维成像显示冻融处理后裂缝体积增大~ 65%,连接孔隙度增大~ 32%。玻璃纤维保留了原来96%的机械性能,显示出最小的结构损伤。微塑料很容易通过过滤去除,废水保持接近中性,有机碳含量低,符合全球水安全标准。这些发现强调了冻融循环作为有效的纤维-树脂分离的可持续途径,对环境的影响最小。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Freeze-thaw recycling for fiber-resin separation in retired wind blades.

The disposal of decommissioned wind turbine blades represents a growing economic loss and environmental concern due to the non-recovery of durable glass fiber-reinforced epoxy composites. Existing thermal and chemical recycling methods often require high temperatures and toxic chemicals, causing material degradation. Here, we present a novel freeze-thaw-based method for fiber-resin separation as an alternative. The process uses only water at human-safe temperatures, leveraging ice-induced expansion to disrupt the glass fiber-epoxy interface. Microscopic imaging and weight analysis revealed visible interface separation, with three-dimensional imaging showing a ~ 65% increase in crack volume and a ~ 32% rise in connected porosity after freeze-thaw treatment. Glass fibers retained up to 96% of their original mechanical properties, demonstrating minimal structural damage. Microplastics were easily removed through filtration, and the effluent water remained near-neutral with low organic carbon levels, meeting global water safety standards. These findings highlight freeze-thaw cycling as a sustainable route for efficient fiber-resin separation with minimal environmental impact.

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