Zafer Yenier, Yoldas Seki, Sibel Aker, Ferhat Öner, Lutfiye Altay, Mehmet Sarikanat
{"title":"The effect of hybrid thermal fillers on thermal conductivity of carbon fiber reinforced polybutylene terephthalate composites","authors":"Zafer Yenier, Yoldas Seki, Sibel Aker, Ferhat Öner, Lutfiye Altay, Mehmet Sarikanat","doi":"10.1002/pi.6622","DOIUrl":"10.1002/pi.6622","url":null,"abstract":"<p>The use of functional polymeric composites with superior thermal properties, capable of replacing conventional polymers, has increased in recent years, particularly in the electrical-electronics sector where thermal management is crucial. Carbon fiber (CF) polymer–matrix structural composites have relatively high in-plane thermal conductivity but low through-plane conductivity. In order to further enhance the through-plane and in-plane conductivity of CF-reinforced polybutylene terephthalate (PBT) composite, a hybrid loading approach was employed, incorporating synthetic graphite (SG), boron nitride (hBN), aluminium nitride (AlN) and graphene (G) in composite formulations. It was found that the in-plane conductivity of PBT-20CF-20SG-3G and the through-plane conductivity of PBT-20CF-20SG-3AlN are 69% and 25% higher, respectively, than those of PBT-40CF. However, the mechanical properties of hybrid composites exhibit lower values compared to those of CF-reinforced PBT composites. The tensile strength value of PBT-40CF is about 33% and 57% higher than those of PBT-20CF-20SG-3G and PBT-20CF-20SG-3AlN. Moreover, the flexural strength of PBT-40CF is about 48% and 38% higher than those of PBT-20CF-20SG-3G and PBT-20CF-20SG-3AlN, respectively. The density value of PBT-40CF is lower than that of the composites of PBT-20CF-20SG. From TGA it was observed that the thermal stability of PBT-40CF is comparable to that of the composites PBT-20CF-20SG. From the conducted study, it can be proposed that the hybrid combination of SG, hBN, AlN and G can be utilized to achieve higher thermal conductivity values, instead of relying solely on CF in the composites. © 2024 The Authors. <i>Polymer International</i> published by John Wiley & Sons Ltd on behalf of Society of Industrial Chemistry.</p>","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":"73 6","pages":"484-493"},"PeriodicalIF":3.2,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/pi.6622","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139923381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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