Ayda Ghary Haghighat, Eider Matxinandiarena, Manuela Zubitur, Agurtzane Mugica, Fulvio Bellato, Anna M. Ferretti, Alessandro Ponti, Souad Ammar, Maryam Abdolrahimi, Gaspare Varvaro, Pierfrancesco Maltoni, Dario Cavallo, Alexander Omelyanchik, Alejandro J. Müller and Davide Peddis
{"title":"生态可持续磁性聚合物复合材料使用回收和不含稀土的硬磁性填料†","authors":"Ayda Ghary Haghighat, Eider Matxinandiarena, Manuela Zubitur, Agurtzane Mugica, Fulvio Bellato, Anna M. Ferretti, Alessandro Ponti, Souad Ammar, Maryam Abdolrahimi, Gaspare Varvaro, Pierfrancesco Maltoni, Dario Cavallo, Alexander Omelyanchik, Alejandro J. Müller and Davide Peddis","doi":"10.1039/D5SU00222B","DOIUrl":null,"url":null,"abstract":"<p >Biodegradable polymer matrices, poly(ε-caprolactone) (PCL), and poly(butylene succinate-<em>ran</em>-butylene adipate) (PBSA) were used to fabricate magnetic composites with recycled NdFeB and rare earth-free lab-synthesized ferrite fillers (SrFe<small><sub>12</sub></small>O<small><sub>19</sub></small> and SrFe<small><sub>12</sub></small>O<small><sub>19</sub></small>–CoFe<small><sub>2</sub></small>O<small><sub>4</sub></small>) across a wide filling range (1–90%). Results obtained by differential scanning calorimetry, polarized light optical microscopy, and phase contrast microscopy, indicated that the magnetic particles tend to aggregate, leading to bimodality in the crystallization process, which can be attributed to distinct regions of the composites with well-dispersed and aggregated particles. Notably, ferrite fillers exhibited lower magnetic anisotropy compared to NdFeB, enabling magnetic saturation at lower fields. These results demonstrate the potential of combining biodegradable polymers with sustainable magnetic fillers for eco-friendly circular economy applications.</p>","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 9","pages":" 4029-4038"},"PeriodicalIF":4.9000,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/su/d5su00222b?page=search","citationCount":"0","resultStr":"{\"title\":\"Eco-sustainable magnetic polymer composites using recycled and rare-earth-free hard magnetic fillers†\",\"authors\":\"Ayda Ghary Haghighat, Eider Matxinandiarena, Manuela Zubitur, Agurtzane Mugica, Fulvio Bellato, Anna M. Ferretti, Alessandro Ponti, Souad Ammar, Maryam Abdolrahimi, Gaspare Varvaro, Pierfrancesco Maltoni, Dario Cavallo, Alexander Omelyanchik, Alejandro J. Müller and Davide Peddis\",\"doi\":\"10.1039/D5SU00222B\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >Biodegradable polymer matrices, poly(ε-caprolactone) (PCL), and poly(butylene succinate-<em>ran</em>-butylene adipate) (PBSA) were used to fabricate magnetic composites with recycled NdFeB and rare earth-free lab-synthesized ferrite fillers (SrFe<small><sub>12</sub></small>O<small><sub>19</sub></small> and SrFe<small><sub>12</sub></small>O<small><sub>19</sub></small>–CoFe<small><sub>2</sub></small>O<small><sub>4</sub></small>) across a wide filling range (1–90%). Results obtained by differential scanning calorimetry, polarized light optical microscopy, and phase contrast microscopy, indicated that the magnetic particles tend to aggregate, leading to bimodality in the crystallization process, which can be attributed to distinct regions of the composites with well-dispersed and aggregated particles. Notably, ferrite fillers exhibited lower magnetic anisotropy compared to NdFeB, enabling magnetic saturation at lower fields. These results demonstrate the potential of combining biodegradable polymers with sustainable magnetic fillers for eco-friendly circular economy applications.</p>\",\"PeriodicalId\":74745,\"journal\":{\"name\":\"RSC sustainability\",\"volume\":\" 9\",\"pages\":\" 4029-4038\"},\"PeriodicalIF\":4.9000,\"publicationDate\":\"2025-07-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://pubs.rsc.org/en/content/articlepdf/2025/su/d5su00222b?page=search\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"RSC sustainability\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://pubs.rsc.org/en/content/articlelanding/2025/su/d5su00222b\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"RSC sustainability","FirstCategoryId":"1085","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2025/su/d5su00222b","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Eco-sustainable magnetic polymer composites using recycled and rare-earth-free hard magnetic fillers†
Biodegradable polymer matrices, poly(ε-caprolactone) (PCL), and poly(butylene succinate-ran-butylene adipate) (PBSA) were used to fabricate magnetic composites with recycled NdFeB and rare earth-free lab-synthesized ferrite fillers (SrFe12O19 and SrFe12O19–CoFe2O4) across a wide filling range (1–90%). Results obtained by differential scanning calorimetry, polarized light optical microscopy, and phase contrast microscopy, indicated that the magnetic particles tend to aggregate, leading to bimodality in the crystallization process, which can be attributed to distinct regions of the composites with well-dispersed and aggregated particles. Notably, ferrite fillers exhibited lower magnetic anisotropy compared to NdFeB, enabling magnetic saturation at lower fields. These results demonstrate the potential of combining biodegradable polymers with sustainable magnetic fillers for eco-friendly circular economy applications.