©　2017　Nova　Science　Publishers,　Inc.　Boron　nitride　nanoparticles　(BNNPs)　were　surface　functionalized　via　chemical　and　physical　approaches　and　subsequently　applied　to　surface　of　fiberglass　prepregs　to　fabricate　hybrid　BNNPs/fiberglass　reinforced　epoxy　composite　laminate.　A　systematic　and　comparative　study　on　BNNPs　functionalization　routes　and　their　effects　on　morphology,　mechanical　property　and　thermal　conductivity　of　final　BNNP　enhanced　composite　laminates　was　performed.　The　functionalized　BNNPs　were　characterized　by　Fourier-transform　infrared　spectroscopy　(FT-IR),　thermogravimetric　analysis　(TGA),　and　scanning　electron　microscopy　(SEM).　The　composite　laminates　with　surface　functionalized　BNNPs　demonstrated　improvement　in　tensile　and　flexural　strength　and　modulus　as　well　as　thermal　conductivity　compared　to　the　composite　laminate　with　pristine　BNNPs.　Physically　functionalized　BNNPs　outperformed　chemically　functionalized　BNNPs　in　all　cases.　SEM　images　indicated　better　compatibility　and　dispersion　of　BNNPs　in　epoxy　matrix　following　either　of　functionalization　route.　It　is　well　known　that　BNNPs　bear　great　radiation-shielding　capability.　This　research　revealed　a　novel　and　industrially　feasible　route　to　incorporate　BNNPs　in　radiation-shielding　aerospace　structural　materials.