廢棄印刷電路板粉塵回收：非金屬部分摻混至高分子再利用;Non-Metallic waste PCB dust for the low carbon plastic applications

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题名:	廢棄印刷電路板粉塵回收：非金屬部分摻混至高分子再利用;Non-Metallic waste PCB dust for the low carbon plastic applications
作者:	戴文琪;Tai, Wen-Chi
贡献者:	材料科學與工程研究所
关键词:	循環經濟;液漩式重力分選;廢棄物資源化;ESG;減碳;Circular economy;Liquid vortex gravity separation;Waste recycling;ESG;Carbon reduction
日期:	2024-07-26
上传时间:	2024-10-09 15:43:33 (UTC+8)
出版者:	國立中央大學
摘要:	近年來，地球暖化加劇，極端的氣候，造成許多「自然」災害在世界各地發生，因此，保護環境刻不容緩，世界各國也提出相關政策，如歐盟綠色新政、中國的碳達峰、碳中和目標、美國的再生能源支持計畫，以及各種塑膠廢棄物的管控措施等。為了對保護這個環境盡一份心力，延續先前開發的印刷電路板粉塵回收，將分選液進行回收，評估擴大其應用範圍的可能性，並把分選過後的非金屬粉塵，摻混至其他材料中，形成新的再生材料。使用減壓蒸餾技術，我們成功回收了 90% 以上的分選液。後續也嘗試分選後成型版粉塵的非金屬部分，摻混至其他高分子中，進行再利用，其中以球磨 2hr ，摻混比例為 10% 的試片擁有最佳的抗拉強度，且此試片的最大分解速率溫度在約 425℃ 相較於未添加的試片有較佳的熱穩定性，摻混非金屬粉塵後，形成一種強度及硬度較好且耐高溫的再生材料。除了原先的成型版粉塵，我們也將此分選技術應用在鑽孔粉塵上，也成功進行分選，分選後其非金屬粉塵的銅含量約在 0.96wt% ，下層金屬粉塵銅含量則為 75.29wt% 。 ;In recent years, exacerbated global warming and extreme weather conditions have led to numerous natural disasters worldwide. Consequently, environmental conservation has become an urgent priority, prompting countries worldwide to enact relevant policies. Examples include the European Union′s Green Deal, China′s commitments to peak carbon emissions and achieve carbon neutrality, the United States′ support for renewable energy initiatives, and various measures to control plastic waste. In order to contribute to environmental protection efforts, we are continuing our previous development of recycling printed circuit board (PCB) dust, with a focus on expanding the scope of its application. We are evaluating the possibility of incorporating the recycled separating solution into other materials, creating new recycled materials. Through the use of vacuum distillation technology, we have successfully achieved a recovery rate of over 90% for the separating solution. Furthermore, we have attempted to separate the non-metallic portion of the shaping dust and incorporate it into other polymers for recycling. Among the various processing methods tested, content 10% non-metal powder that is ball milled for 2hr have a resulted in the highest tensile strength. Additionally, the maximum decomposition rate temperature of the sample with added non-metallic dust is approximately 425°C, indicating better thermal stability compared to samples without additives. This blending of non-metallic dust produces a recycled material with improved strength, hardness, and high-temperature resistance. In addition to the original application for shaping dust, we have extended this separation technology to drilling dust, achieving successful separation. The non-metallic copper content of the separated non-metallic dust from drilling dust is approximately 0.96wt%, while the copper content of the lower-layer metallic dust is 75.29wt%
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