Boron nitride nanosheet reinforced polyethylene nanocomposite film for high-performance hot-melt adhesive type thermal interfacial material. (9th May 2023)

• Record Type: Journal Article
• Authors: Lee, Young Sun; Kshetri, Tolendra; Kim, Nam Hoon; Park, Ok-Kyung; Lee, Joong Hee
• Is Part Of: Polymer. Volume 275(2023)
• Publication Date: 2023-05-09
• Subjects: Low-density polyethylene -- Boron nitride nanosheet -- Polymer composite -- Hot-melt adhesive -- Thermal interfacial materials -- Interfacial bond; Polymers -- Periodicals; Polymerization -- Periodicals; Polymères -- Périodiques; Polymérisation -- Périodiques; 547.7
• DOI: 10.1016/j.polymer.2023.125934
• Languages: English
• ISSNs: 0032-3861

Abstract

Abstract: In this study, we report an effective synthesis approach for fabricating low-density polyethylene (LDPE)-based multi-functional composite through hybridization with short PE chain branched boron nitride nanosheet (BNNS) to be applied as a high-performance hot-melt adhesive (HMA) type thermal interface material (TIM). To enhance the thermal and mechanical properties of BNNS/LDPE, the BNNS surface was modified with short PE chain (PE–g–BNNS) via nitrene coupling reaction to improve the interfacial bonding force between the BNNS with LDPE. As a result, PE–g–BNNS/LDPE exhibited 22% increase in through-plane and 66% increase in in-plane thermal conductivity compared to the BNNS/LDPE. Its heat radiation performance was also increased by about 11% compared to the bare LDPE. In addition, the PE–g–BNNNS/LDPE shows 66% increase in tensile strength and 350% enhancement in modulus compared to the bare LDPE, suggesting that the PE–g–BNNNS/LDPE could be used as a TIM to meet the requirements for application in high-tech electronic devices. Graphical abstract: Image 1 Highlights: The effective synthesis way to fabrication of high-performance BNNS/LDPE composites. Efficient heat conduction paths were constructed by linked PE-g-BNNS with LDPE. Enhance the performance by strengthening the coupling between BNNS and LDPE matrix. The BNNS/LDPE composites with excellent comprehensive properties can be used as TIM.