类别:有毒物品
毒性分级:高毒
急性毒性(口服-大鼠):LD50 = 40 毫克/公斤
可燃性危险特性:遇明火或高温可燃,分解产生有毒溴化物气体
储运特性:库房应保持通风、低温和干燥;与食品及氧化剂分开存放
灭火剂:干粉、二氧化碳或砂土
We investigated sol-gel-derived silica-based hard coatings on modified polyester substrates. The silica network was modified by incorporating an organic component and adding transition metal oxides. These modifications resulted in tailored thermal, optical, and mechanical properties of the coatings. Various low-temperature densification techniques were studied including sol-preparation procedure, enhanced solvent evaporation, ultraviolet irradiation, and low-temperature heating (below 150 °C). Oxygen plasma etching was applied to improve the adhesion of the sol-gel coatings on the plastic surface. Nanoindentation analysis revealed that the coatings have a surface hardness up to 2.5 ± 0.27 GPa and an elastic modulus up to 13.6 ± 0.4 GPa, approximately an order of magnitude higher than that of the plastic surface.