To simultaneously endow thermal conductivity

high glass transition temperature (Tg) and healing capability to glass fiber/epoxy (GFREP) composite

dynamic crosslinked epoxy resin bearing reversible β-hydroxyl ester bonds was reinforced with boron nitride nanosheets modified glass fiber cloth (GFC@BNNSs). The in-plane heat conduction paths were constructed by electrostatic self-assembly of polyacrylic acid treated GFC and polyethyleneimine decorated BNNSs. Then

the GFC@BNNSs were impregnated with the mixture of lower concentration (3-glycidyloxypropyl) trimethoxysilane grafted BN micron sheets

3

4-epoxycyclohexylmethyl 3

4-epoxycyclohexanecarboxylate and hexahydro-4-methylphthalic anhydride

which accounted for establishing the through-plane heat transport pathways and avoiding serious deterioration of mechanical performances. The resultant GFREP composite containing less boron nitride particles (17.6 wt%) exhibited superior in-plane (3.29 W m-1 K-1) and through-plane (1.16 W m-1 K-1) thermal conductivities

as well as high Tg of 204 oC (Tg of the unfilled epoxy = 177 oC). The reversible transesterification reaction enabled closure of interlaminar cracks within the composite

achieving decent healing efficiencies estimated by means of tensile strength (71.2%)

electrical breakdown strength (83.6%) and thermal conductivity (69.1%). The present work overcame the disadvantages of conventional thermally conductive composites

and provided an efficient approach to prolong the life span of thermally conductive GFREP laminate for high-temperature resistant integrated circuit application.