Multifunctional cyanate ester nanocomposites reinforced by hexagonal boron nitride after noncovalent biomimetic functionalization.
Boron nitride (BN) reinforced polymer nanocomposites have attracted a growing research interest in the microelectronic industry for their uniquely thermal conductive but electrical insulating properties. To overcome the challenges in surface functionalization, in this study, hexagonal boron nitride (h-BN) nanoparticles were noncovalently modified with polydopamine in a solvent-free aqueous condition. The strong π-π interaction between the hexagonal structural BN and aromatic dopamine molecules facilitated 15 wt % polydopamine encapsulating the nanoparticles. High-performance bisphenol E cyanate ester (BECy) was incorporated by homogeneously dispersed h-BN at different loadings and functionalities to investigate their effects on thermo-mechanical, dynamic-mechanical, and dielectric properties, as well as thermal conductivity. Different theoretical and empirical models were successfully applied to predict thermal and dielectric properties of h-BN/BECy nanocomposites. Overall, the prepared h-BN/BECy nanocomposites exhibited outstanding performance in dimensional stability, dynamic-mechanical properties, and thermal conductivity, together with the controllable dielectric property and preserved thermal stability for high-temperature applications.
†Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50011, United States.
Hongchao
H
Wu
†Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50011, United States.|‡Ames Laboratory, U.S. Department of Energy, Ames, Iowa 50011, United States.|§School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99164, United States.
Michael R
MR
Kessler
D000327:Adsorption; D040761:Biomimetic Materials / Q000138:chemical synthesis*; D001896:Boron Compounds / Q000737:chemistry*; D003460:Crystallization / Q000379:methods; D003485:Cyanates / Q000737:chemistry*; D007211:Indoles / Q000737:chemistry*; D008422:Materials Testing; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D011108:Polymers / Q000737:chemistry*; D013499:Surface Properties; D013718:Tensile Strength
D001896:Boron Compounds; D003485:Cyanates; D007211:Indoles; D011108:Polymers; C568283:polydopamine; C017282:boron nitride
boron nitride; dielectric properties; polymer−matrix composites (PMCs); surface functionalization; thermal conductivity; thermo-mechanical properties