Infusion of graphene quantum dots to modulate thermal conductivity and dynamic mechanical properties of polymers. (17th December 2019)

• Record Type: Journal Article
• Authors: Seibert, Joel R.; Keleş, Özgür; Wang, Jun; Erogbogbo, Folarin
• Is Part Of: Polymer. Volume 185(2019)
• Publication Date: 2019-12-17
• Subjects: Graphene quantum dos -- Epoxy -- Thermal conductivity; Polymers -- Periodicals; Polymerization -- Periodicals; Polymères -- Périodiques; Polymérisation -- Périodiques; 547.7
• DOI: 10.1016/j.polymer.2019.121988
• Languages: English
• ISSNs: 0032-3861

Abstract

Abstract: Graphene quantum dots are small fragments of graphene that may be advantageous to transferring properties to polymers because of their small size, molecular like interactions, surface chemistry and ability to overcome dispersibility challenges in composite formation. Here, we begin the first thermal conductivity study with graphene quantum dots by revealing the thermal and mechanical properties of composites made by infusing graphene quantum dots into epoxy. We found that graphene quantum dots that have the capability to improve the toughness of epoxy by 260%, increase the thermal conductivity by 144%, increase the glass transition temperature by 10%, increase the storage modulus by 9%, and decrease damping by 45%. We anticipate graphene quantum dots infusion to be a starting point for creating more sophisticated polymer composites. Graphical abstract: Image 1 Highlights: GQDs increased epoxy thermal conductivity by 144%. GQDs increased epoxy glass transition temperature by 10%. GQDs increased epoxy storage modulus by 9%.