Recycling of a post-industrial printed multilayer plastic film containing polyurethane inks by solvent-targeted recovery and precipitation

IF 11.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL Resources Conservation and Recycling Pub Date : 2023-10-01 DOI:10.1016/j.resconrec.2023.107086

Kevin L. Sánchez-Rivera , Aurora del Carmen Munguía-López , Panzheng Zhou , Victor S. Cecon , Jiuling Yu , Kevin Nelson , Daniel Miller , Steve Grey , Zhuo Xu , Ezra Bar-Ziv , Keith L. Vorst , Greg W. Curtzwiler , Reid C. Van Lehn , Victor M. Zavala , George W. Huber

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引用次数: 1

Abstract

The recently reported Solvent-Targeted Recovery And Precipitation (STRAP) strategy is used to deconstruct multilayer plastic packaging films into their constituent resins by selective polymer dissolution. To broaden the applicability of STRAP, we demonstrate the process with a flexible post-industrial printed multilayer plastic film used for food packaging. The material was a reverse printed film composed of polyethylene (PE), ethylene vinyl alcohol (EVOH), polyethylene terephthalate (PET), and polyurethane (PU)-based inks. Removal of all colors was observed with biomass-derived gamma-valerolactone (GVL) and the recovered polymers possessed comparable properties to the corresponding virgin resins. A technoeconomic analysis indicates that this STRAP process could be economically feasible at a processing capacity of 6,000 tons per year. Moreover, the production of plastic films with materials recovered by this STRAP process can have a lower climate change impact than the production of films from virgin polymers.

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回收后工业印刷多层塑料薄膜含有聚氨酯油墨的溶剂定向回收和沉淀

最近报道的溶剂靶向回收和沉淀（STRAP）策略用于通过选择性聚合物溶解将多层塑料包装膜分解为其组成树脂。为了扩大STRAP的适用性，我们用一种用于食品包装的柔性后工业印刷多层塑料薄膜演示了该工艺。该材料是由聚乙烯（PE）、乙烯醇（EVOH）、聚对苯二甲酸乙二醇酯（PET）和聚氨酯（PU）基油墨组成的反向印刷薄膜。用生物质衍生的γ-戊内酯（GVL）观察到所有颜色的去除，并且回收的聚合物具有与相应的原始树脂相当的性质。技术经济分析表明，在每年6000吨的加工能力下，这种STRAP工艺在经济上是可行的。此外，用这种STRAP工艺回收的材料生产塑料薄膜比用原始聚合物生产薄膜对气候变化的影响更小。

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来源期刊

Resources Conservation and Recycling 环境科学-工程：环境

CiteScore

22.90

自引率

6.10%

发文量

625

审稿时长

23 days

期刊介绍： The journal Resources, Conservation & Recycling welcomes contributions from research, which consider sustainable management and conservation of resources. The journal prioritizes understanding the transformation processes crucial for transitioning toward more sustainable production and consumption systems. It highlights technological, economic, institutional, and policy aspects related to specific resource management practices such as conservation, recycling, and resource substitution, as well as broader strategies like improving resource productivity and restructuring production and consumption patterns. Contributions may address regional, national, or international scales and can range from individual resources or technologies to entire sectors or systems. Authors are encouraged to explore scientific and methodological issues alongside practical, environmental, and economic implications. However, manuscripts focusing solely on laboratory experiments without discussing their broader implications will not be considered for publication in the journal.