Study of Aramid Fiber/Polychloroprene Recycling Process by Thermal Degradation

Dabkiewicz, Igor; Silva, Ítalo Vinícius Soares e; Marcuzzo, Jossano Saldanha; Sales, Rita de Cássia Mendonça

doi:10.5028/jatm.v8i3.593

Cited by 6 publications

(3 citation statements)

References 7 publications

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“…It is inevitable to generate proportional discards of aramid fiber-based materials, whether originating from the manufacturing process, spare parts, or end of life cycle. 29 In particular, the aramid fibers derived from the manufacturing process often maintain the properties of the virgin fibers. The images of the recycled aramid resources, including woven fabric, yarn, rope, and glove, are shown in Figure 1a 1 −d 1 .…”

Section: Resultsmentioning

confidence: 99%

Recycling of High-Value-Added Aramid Nanofibers from Waste Aramid Resources via a Feasible and Cost-Effective Approach

Yang

Zhang

et al. 2021

ACS Nano

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High-performance aramid fibers are extensively applied in the civil and military fields. A great deal of waste aramid resources originating from the manufacturing process, spare parts, or end of life cycle are wrongly disposed (i.e., landfill, smash, fibrillation), causing a waste of valuable resources as well as severe environmental pollution. Although aramid nanofibers (ANFs) have recently been recently reported as one of the most promising building blocks due to their excellent properties, they suffer from an extremely high production expenditure, thereby greatly hindering their scale-up application. Herein, in this paper, from a resources-saving and cost-reductional perspective, we present a feasible top-down approach to recycle high value-added ANFs with an affordable cost from various waste aramid resources. The results indicate that although the reclaimed ANFs have a molecular weight reduction of 8.1% compared with the recycled aramid fibers, they still exhibit a molecular weight of 43.0 kg·mol–1 that represents the highest value compared to other methods. It is noteworthy that the fabrication cost of ANFs is significantly reduced (∼7 times) due to the reclamation of waste aramid fibers instead of the expensive virgin aramid fibers. The obtained ANFs show impressive tensile strength (149.2 MPa) and toughness (10.43 MJ·m–3), excellent thermal stabilities (T d of 542 °C), and a high specific surface area (65.2 m2·g–1), which endows them to be promising candidates for constructing advanced materials. Compared to the aramid pulp obtained by the traditional recycling method, ANFs show significant advantages in dimensional homogeneity, aspect ratio, dispersibility, film-forming property, and especially the excellent properties of the ANF film. In addition, the scale-up preparation of ANFs from the recycled waste aramid fibers is carried out, demonstrating it is highly economically viable. Therefore, this work provides a highly feasible and cost-effective recycle system to reclaim the waste aramid resources together with significantly reducing the preparation cost of ANFs.

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Section: Resultsmentioning

confidence: 99%

Recycling of High-Value-Added Aramid Nanofibers from Waste Aramid Resources via a Feasible and Cost-Effective Approach

Yang

Zhang

et al. 2021

ACS Nano

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“…Dabkiewicz et al [7] studied a recycling method in aramid fibers/Neoprene composites (Figure 2). They aimed to remove the Neoprene layer by pyrolysis.…”

Section: Figure 1 Structure Of the Most Common Aramid Typesmentioning

confidence: 99%

“…This was introduced to the market under the name Kevlar [6]. Due to their high strength-to-weight ratio and temperature resistance, aramids are important materials in the military, aerospace and automotive industries [7], [8]. On an equal weight basis aramids have better mechanical properties, compared to steel and glass fibers [9].…”

Section: Introductionmentioning

confidence: 99%

Aramid fiber recovery from waste composite by pyrolysis

Sebe,

Kállay

2023

MDT

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Due to their outstanding mechanical properties and temperature resistance, aromatic polyamides are widely used for reinforcement in composite materials. The high consumption leads to an increasing waste generation. The recycling of composites requires a complex process, therefore the investigation of aramid fiber recovery is still in the middle of attention. In this study, the pyrolytic behavior of a waste aramid composite was investigated. Then laboratory-scale pyrolysis experiments were performed in a tubular reactor at 400 °C.

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