Abstract

Nanoparticles with core-shell structure provide a new potential technology to improve the efficiency of flame retardants. Using nanometer antimony trioxide particles (nano-Sb₂O₃) as matrix material and brominated bisphenol-A epoxy vinyl ester resin (Br-VERs) diluted by toluene (PhMe) or styrene (ST) as the coating material, PhMe-nano-Sb₂O₃@Br-VERs and ST-nano-Sb₂O₃@Br-VERs core-shell composite particles were prepared by electromagnetic stirring method. The results show that Br-VERs can successfully coat on the surface of nano-Sb₂O₃, thus forming core-shell composite particles with crystalline nano-Sb₂O₃ as the core and amorphous Br-VERs as the shell. The thickness of Br-VERs shell of PhMe-nano-Sb₂O₃@Br-VERs composite particles is between 9.5 nm and 15.5 nm, and the shell’s mass fraction is 20.8% in the composite particles. The thickness of Br-VERs shell of ST-nano-Sb₂O₃@Br-VERs composite particles is between 5.5 and 9.5 nm, and the shell’s mass fraction is 3.8%. The mass of Br-VERs shell of PhMe-nano-Sb₂O₃@Br-VERs composite particles is 5.47 times that of ST-nano-Sb₂O₃@Br-VERs composite particles, which indicates PhMe used as the diluent for Br-VERs has a better effect than that of ST used as the diluent.

摘要

具有核壳结构的纳米粒子为提高阻燃剂的效率提供了一种新的潜在技术。以纳米三氧化二锑颗粒（nano-Sb ₂ O ₃）为基体材料，以甲苯（PhMe）或苯乙烯（ST）稀释的溴化双酚A环氧乙烯基酯树脂（Br-VERs）为涂层材料，PhMe-nano-采用电磁搅拌法制备了Sb ₂ O ₃ @Br-VERs和ST-nano-Sb ₂ O ₃ @Br-VERs核壳复合粒子。结果表明，Br-VERs可以成功包覆在纳米Sb ₂ O _{3的表面，从而形成具有结晶纳米Sb 2} O的核壳复合粒子。₃为核，无定形Br-VERs为壳。PhMe-nano-Sb ₂ O ₃ @Br-VERs复合颗粒的Br-VERs壳层厚度在9.5~15.5 nm之间，壳层在复合颗粒中的质量分数为20.8%。ST-nano-Sb ₂ O ₃ @Br-VERs复合颗粒的Br-VERs壳层厚度在5.5~9.5 nm之间，壳层质量分数为3.8%。_{PhMe-nano-Sb 2} O ₃ @Br-VERs 复合粒子的 Br-VERs 壳质量是 ST-nano-Sb ₂ O ₃ @ Br-VERs 复合粒子的 5.47 倍，说明 PhMe 用作稀释剂Br-VERs比ST用作稀释剂效果更好。