纳米SiO2的分散对淀粉浆膜力学性能的影响

 为了探讨纳米SiO₂的分散状况对纳米SiO₂/淀粉复合浆料浆膜力学性能的影响,采用超声波对纳米SiO₂进行分散,提取经不同时间分散的纳米SiO₂水基悬浮液,用AFM、TEM观察纳米SiO₂的分散状况和其团聚体粒径,并结合不同分散时间下的浆膜力学性能测试数据,研究纳米SiO₂不同分散状况下复合浆料浆膜力学性能的变化。结果表明,当超声波分散达到50 min时,纳米SiO₂的分散状况较好,并保持稳定,用此分散液制备的浆膜力学性能最佳。

Effect of dispersibility of SiO2 nanoparticle on mechanical property of starch film

In order to investigate the effect of dispersibility of SiO_2 nanoparticle on the mechanical properties of SiO_2 nanoparticles/starch film,the aqueous suspension of the SiO_2 nanoparticles,which had been dispersed by the ultrasonic technique in different duration,was observed by atomic force microscope(AFM) and transmission electron microscope(TEM).The mechanical properties of the film varying with the dispersibility of SiO_2 nanoparticles as a result of difficult duration of ultrasonic treatment were examined.The result indicated that SiO_2 nanoparticles dispersed by the ultrasonic technique for 50 minutes exhibited good dispersibility and stability,and the film prepared with this dispersion also had optimal mechanical properties.