Boron Nitride Nanosheets Reinforced Polyethylene Thermal Interfacial Materials
Dec 11, 2023
Polyethylene Thermal Interfacial Materials
Prof. Joong Hee Lee and Prof. Ok-kyung Park from South Korea have jointly made new advances in the direction of interfacial thermal resistance of BNNS/LDPE polymer composites. The team reported an effective synthetic method to prepare low-density polyethylene (LDPE)-based multifunctional composites by hybridization with short PE chain-branched boron nitride nanosheets (BNNS) for high-performance hot-melt adhesive (HMA)-based thermal interface materials (TIM). In order to improve the thermomechanical properties of BNNS/LDPE, the surface of BNNS was modified with short PE chains (PE-g-BNNS) through nitro coupling reaction, which improved the interfacial bonding between BNNS and LDPE.
The results showed that the in-plane thermal conductivity of PE-g-BNNS/LDPE was increased by 22% and the in-vertical thermal conductivity was increased by 66% compared with that of BNNS/LDPE. The thermal radiation performance was also improved by about 11% compared to pure LDPE. In addition, the tensile strength of PE-g-BNNNS /LDPE increased by 66% and modulus by 350% compared to pure LDPE, indicating that PE-g-BNNNS /LDPE can be used as a TIM to meet the application requirements of high-tech electronic devices.
The research results are summarized as "Boron nitride nanosheet reinforced polyethylene nanocomposite film for high-performance hot-melt adhesive type thermal interfacial material" was published in Polymer.
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