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Improvement of the chemical recycling process of waste carbon fibre reinforced plastics using a mechanochemical process: Influence of process parameters

机译:使用机械化学方法改善废碳纤维增强塑料的化学回收过程:工艺参数的影响

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摘要

We present the experimental results of an optimal recycling method for waste carbon fibre reinforced plastics (CFRPs) that is based on the application of a set of unit mechanochemical processes. The objectives of this study were to highlight the influence of process factors that are inherent in the chemical recycling process of waste CFRP. We investigated the influence of the soaking period, the application of a catalyst and impurities on the recycling process and recovery efficiency of the waste CFRP. Different combinations of the unit mechanochemical processes were investigated, and the effectiveness of the combination was analysed. The chemical recycling process was conducted using benzyl alcohol under ordinary pressure at initial solvent temperatures lower/equivalent to its flash point temperature. Experimental results showed that the solvent temperature increased up to boiling temperature levels when the mechanochemical process was initiated, thereby enhancing the mechanochemical process. The presence of impurities did not influence the recovery rate. Likewise, this experimental study highlighted the importance of accounting for the soaking period during the chemical recycling process: an extended soaking period resulted in a higher recovery rate, a lower portion of undissolved solids and recovered fibres of better quality. This research highlighted the significance of choosing the proper combination for the chemical recycling process as well as the benefits of recycling the waste CFRP with negligible application of the catalyst.
机译:我们介绍了基于一组单元机械化学过程的应用的废碳纤维增强塑料(CFRP)最佳回收方法的实验结果。这项研究的目的是强调废物CFRP的化学回收过程中固有的过程因素的影响。我们研究了浸泡时间,催化剂和杂质的应用对CFRP废料回收利用过程的影响。研究了单元机械化学过程的不同组合,并分析了组合的有效性。使用苯甲醇在常压下于低于/等于其闪点温度的初始溶剂温度下进行化学循环过程。实验结果表明,当启动机械化学过程时,溶剂温度升高到沸腾温度水平,从而增强了机械化学过程。杂质的存在不影响回收率。同样,该实验研究强调了在化学回收过程中考虑浸泡时间的重要性:延长浸泡时间会导致更高的回收率,更少的未溶解固体和质量更好的回收纤维。这项研究强调了为化学回收过程选择适当组合的重要性,以及在可忽略的催化剂用量下回收CFRP废料的好处。

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