Boron nitride nanosheet reinforced polyethylene nanocomposite film for high-performance hot-melt adhesive type thermal interfacial material
Young Sun Lee, Tolendra Kshetri, Nam Hoon Kim, Ok‐Kyung Park, Joong Hee Lee
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.