Tensile and Elastocaloric Properties of Natural/Devulcanized Waste Rubber Blends.

IF 5.4 3区材料科学 Q2 CHEMISTRY, PHYSICAL ACS Applied Energy Materials Pub Date : 2024-11-01 Epub Date: 2024-09-23 DOI:10.1002/marc.202400422

Agathe Lewandowski, Nicolas Candau, María Lluisa Maspoch

{"title":"Tensile and Elastocaloric Properties of Natural/Devulcanized Waste Rubber Blends.","authors":"Agathe Lewandowski, Nicolas Candau, María Lluisa Maspoch","doi":"10.1002/marc.202400422","DOIUrl":null,"url":null,"abstract":"The need for eco-friendly cooling materials and material recycling are two urgent challenges to address. In this paper, the role of the ground tyre rubber treatment (cryo-grinding and devulcanization) is investigated on the tensile and elastocaloric properties of Natural rubber (NR)/ ground tyre rubber (GTR). The GTR particles that are sieved (<63µm) and devulcanized by microwave irradiation (1 min at 800Watts) exhibit a low network chain density (0.53 × 10-4 mol.cm-3) resulting from crosslinks breakage and rubber chains scission, as supported by FTIR showing a decrease of S─S, C─S, and C─C bonds. The NR/GTR blends show a high elastocaloric effect as compared to the pristine NR, which can be ascribed to the high content of carbon black in the GTR (52 wt.%) and also the high level of devulcanization of the GTR. NR/GTR blends reach a heating of +8 °C and a cooling of >-6 °C, resulting in a material's coefficient of performance COPmat = 2.8-3 compared to 2.6 for the pristine NR. The concomitant effect of cryogrinding and microwave devulcanization is proposed as a way to improve the tensile and elastocaloric properties of natural rubber/waste rubber blends for their possible integration into elastocaloric devices for heating/cooling applications.","PeriodicalId":4,"journal":{"name":"ACS Applied Energy Materials","volume":null,"pages":null},"PeriodicalIF":5.4000,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Applied Energy Materials","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1002/marc.202400422","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/9/23 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

The need for eco-friendly cooling materials and material recycling are two urgent challenges to address. In this paper, the role of the ground tyre rubber treatment (cryo-grinding and devulcanization) is investigated on the tensile and elastocaloric properties of Natural rubber (NR)/ ground tyre rubber (GTR). The GTR particles that are sieved (<63µm) and devulcanized by microwave irradiation (1 min at 800Watts) exhibit a low network chain density (0.53 × 10^-4 mol.cm^-3) resulting from crosslinks breakage and rubber chains scission, as supported by FTIR showing a decrease of S─S, C─S, and C─C bonds. The NR/GTR blends show a high elastocaloric effect as compared to the pristine NR, which can be ascribed to the high content of carbon black in the GTR (52 wt.%) and also the high level of devulcanization of the GTR. NR/GTR blends reach a heating of +8 °C and a cooling of >-6 °C, resulting in a material's coefficient of performance COP_mat = 2.8-3 compared to 2.6 for the pristine NR. The concomitant effect of cryogrinding and microwave devulcanization is proposed as a way to improve the tensile and elastocaloric properties of natural rubber/waste rubber blends for their possible integration into elastocaloric devices for heating/cooling applications.

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

天然/脱硫废橡胶混合物的拉伸和弹性特性

环保型冷却材料的需求和材料的回收利用是亟待解决的两大难题。本文研究了轮胎橡胶处理（低温研磨和脱硫化）对天然橡胶（NR）/轮胎橡胶（GTR）的拉伸和弹性特性的影响。傅立叶变换红外光谱（FTIR）显示，S─S、C─S 和 C─C 键的减少证明了交联断裂和橡胶链断裂导致的 GTR 颗粒过筛（-4 mol.cm-3）。与原始 NR 相比，NR/GTR 混合物显示出较高的弹性热效应，这可归因于 GTR 中较高的炭黑含量（52 wt.%）以及 GTR 的高度脱硫。NR/GTR 混合物的加热温度为 +8 °C，冷却温度大于 6 °C，材料的性能系数 COPmat = 2.8-3，而原始 NR 的性能系数为 2.6。低温胶结和微波脱硫的共同作用被认为是改善天然橡胶/废橡胶混合物拉伸和弹性性能的一种方法，可将其集成到用于加热/冷却应用的弹性设备中。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

ACS Applied Energy Materials Materials Science-Materials Chemistry

CiteScore

10.30

自引率

6.20%

发文量

1368

期刊介绍： ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.