聚乙烯醇修饰氧化镁/聚ε-己内酯纳米复合物性能研究

Study on the Properties of Poly(vinyl alcohol) Modified MgO/Poly(ε-caprolactone) Nanocomposites

使用超声分散方法制备了聚乙烯醇(PVA)修饰的氧化镁(MgO)/聚ε-己内酯(PCL)纳米复合物。用傅里叶变换红外光谱、热重分析仪、电子万能试验机、场发射扫描电镜对纳米粒子及复合物进行了表征。结果表明,PVA被成功地修饰到了MgO纳米粒子表面;MgO纳米粒子、PVA、PCL之间存在氢键的相互作用;当MgO-PVA添加量为2%时,MgO-PVA在PCL中能够很好地分散,并使得PCL的拉伸强度提高10%、断裂伸长率提高13.7%,但是当添加量为5%和10%时,由于纳米粒子的团聚,造成了力学性能急剧下降。

The poly （ vinyl alcohol） -modified MgO/poly （ ε-caprolactone ） （PCL） nanocomposites were prepared using ultrasound irradiation. The nanoparticles and nanocomposites were characterized by fourier transform infrared spectroscopy, thermal gravimetric analysis, electronic universal testing machine and field emission scanning electron microscope. The results show that PVA is successfully modified onto the magnesium oxide （MgO） surface; there is hydrogen bonding interaction among MgO nanoparticles, PVA and PCL. When the MgO-PVA content is 2%, due to good dispersion, the tensile strength of PCL is increased by 10% and the elongation at break is increased by 13.7% ; but when the contents are 5% and 10%, the mechanical properties decrease sharply due to nanoparticles aggregation.