Multi-factor coupled aging and recycling of meta-aramid filter bags

IF 2.6 4区化学 Q3 POLYMER SCIENCE

Journal of Polymer Research Pub Date : 2024-10-31 DOI:10.1007/s10965-024-04144-8

Feng Dai, Jingxian Liu

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引用次数: 0

Abstract

The meta-aramid (PMIA) filter bag is one of the most common filter materials used in high-temperature exhaust filtration. However, the current understanding of the recycling of this material, and the durability and stability in multi-factor coupling environments is limited. In this work, the aging characteristics of PMIA filter bags under multi-factorial coupling were investigated, and the effect of the aging degree on the recycling. Firstly, the performance of the filter bags before and after aging was characterized by FT-IR, mechanical properties, SEM, and EDS analysis. The results show that the mechanical properties and thermal stability of the PMIA filter bag rapidly deteriorated under multi-factor coupling. Moreover, The PMIA can be completely dissolved in a LiCl-DMAc mixed solution. Therefore, LiCl-DMAc mixed solution can be used to dissolve used needle felt and prepare it into a thin film. The light transmission deteriorates of the recycled films made from aged needle felt, while still maintaining good tensile strength (σt) >55 MPa with Young’s modulus (E) >2 GPa. The effect of the aging degree of filter bags on the performance of recycled films was systematically investigated. The whole process does not cause environmental pollution. This study provides useful information for the degradation and recycling of PMIA.

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偏芳纶过滤袋的多因素耦合老化和循环利用

间位芳纶（PMIA）过滤袋是高温废气过滤中最常用的过滤材料之一。然而，目前人们对这种材料的回收利用以及在多因素耦合环境下的耐久性和稳定性了解有限。在这项工作中，研究了 PMIA 过滤袋在多因素耦合下的老化特性，以及老化程度对回收利用的影响。首先，通过傅立叶变换红外光谱、力学性能、扫描电镜和 EDS 分析对老化前后滤袋的性能进行了表征。结果表明，在多因素耦合作用下，PMIA 滤袋的机械性能和热稳定性迅速恶化。此外，PMIA 可以完全溶解在 LiCl-DMAc 混合溶液中。因此，LiCl-DMAc 混合溶液可用于溶解用过的针刺毡并将其制备成薄膜。用老化的针刺毡制成的再生薄膜透光性变差，但仍保持良好的拉伸强度（σt）>55 MPa，杨氏模量（E）>2 GPa。系统研究了过滤袋的老化程度对再生薄膜性能的影响。整个过程不会造成环境污染。这项研究为 PMIA 的降解和回收提供了有用的信息。

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来源期刊

Journal of Polymer Research 化学-高分子科学

CiteScore

4.70

自引率

7.10%

发文量

472

审稿时长

3.6 months

期刊介绍： Journal of Polymer Research provides a forum for the prompt publication of articles concerning the fundamental and applied research of polymers. Its great feature lies in the diversity of content which it encompasses, drawing together results from all aspects of polymer science and technology. As polymer research is rapidly growing around the globe, the aim of this journal is to establish itself as a significant information tool not only for the international polymer researchers in academia but also for those working in industry. The scope of the journal covers a wide range of the highly interdisciplinary field of polymer science and technology, including: polymer synthesis; polymer reactions; polymerization kinetics; polymer physics; morphology; structure-property relationships; polymer analysis and characterization; physical and mechanical properties; electrical and optical properties; polymer processing and rheology; application of polymers; supramolecular science of polymers; polymer composites.