Ricardo F.B. Pinho, Cláudio M.R. Almeida, Ana C. Fonseca, Luísa Durães
{"title":"Preparation of PET-based aerogels from post-consumer packaging waste","authors":"Ricardo F.B. Pinho, Cláudio M.R. Almeida, Ana C. Fonseca, Luísa Durães","doi":"10.1016/j.jclepro.2024.144509","DOIUrl":null,"url":null,"abstract":"In this work, a straightforward method to produce aerogels from recycled poly(ethylene terephthalate) (rPET) drinking water bottles is presented. It consists of dissolving the rPET, followed by precipitation and subsequent gelation, after which the aerogel is obtained by freeze-drying. Three types of rPET aerogels, unreinforced and reinforced with organic or inorganic fibers, were prepared using this method. The obtained aerogels have a porosity between 80 and 86% and a bulk density between 150 and 210 kg/m<sup>3</sup>. The resulting materials have good mechanical properties, with a Young's modulus between 1.5 and 3.5 MPa, and do not release particles when handled. They also show thermal insulation capability at the level of commercial thermal insulators (∼20-65 mW m<sup>-1</sup> K<sup>-1</sup>). The observed presence of macropores in the predominantly mesoporous structure can be useful for sound absorption. The developed aerogels represent a unique opportunity to value plastic waste by producing an advanced material, following the principles of the circular economy.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"22 1","pages":""},"PeriodicalIF":9.7000,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Cleaner Production","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1016/j.jclepro.2024.144509","RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
引用次数: 0
Abstract
In this work, a straightforward method to produce aerogels from recycled poly(ethylene terephthalate) (rPET) drinking water bottles is presented. It consists of dissolving the rPET, followed by precipitation and subsequent gelation, after which the aerogel is obtained by freeze-drying. Three types of rPET aerogels, unreinforced and reinforced with organic or inorganic fibers, were prepared using this method. The obtained aerogels have a porosity between 80 and 86% and a bulk density between 150 and 210 kg/m3. The resulting materials have good mechanical properties, with a Young's modulus between 1.5 and 3.5 MPa, and do not release particles when handled. They also show thermal insulation capability at the level of commercial thermal insulators (∼20-65 mW m-1 K-1). The observed presence of macropores in the predominantly mesoporous structure can be useful for sound absorption. The developed aerogels represent a unique opportunity to value plastic waste by producing an advanced material, following the principles of the circular economy.
期刊介绍:
The Journal of Cleaner Production is an international, transdisciplinary journal that addresses and discusses theoretical and practical Cleaner Production, Environmental, and Sustainability issues. It aims to help societies become more sustainable by focusing on the concept of 'Cleaner Production', which aims at preventing waste production and increasing efficiencies in energy, water, resources, and human capital use. The journal serves as a platform for corporations, governments, education institutions, regions, and societies to engage in discussions and research related to Cleaner Production, environmental, and sustainability practices.