Organic Polymer Chemistry Research Laboratory, Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Islamic Republic of Iran; Research Institute for Nanotechnology and Advanced Materials, Isfahan University of Technology, Isfahan 84156-83111, Islamic Republic of Iran.
Organic Polymer Chemistry Research Laboratory, Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Islamic Republic of Iran.
Ultrason Sonochem. 2018 Jan;40(Pt A):881-889. doi: 10.1016/j.ultsonch.2017.08.039. Epub 2017 Sep 1.
Poly(vinyl alcohol) (PVA) based nanocomposites (NCs) filled by various weight percent of modified ZrO nanoparticles (NPs) with vitamin B (VB) up to 7wt% were fabricated via ultrasonication method then was cast to thin films. The ultrasonication was applied for the preparation and modification process asan easy, safe and fast method. Ultrasonic was responsible for great homogeneities of NPs into PVA matrix, which could not be achieved by mechanical or magnetically stirring. The creation of polymer NCs and changes in the structural properties were examined by X-ray diffraction. FT-IR spectroscopy indicated the possible interactions of the ZrO-VB NPs with the PVA backbones and also, existence of absorption bands related to PVA and ZrO NPs in the NC structures. The distribution of nano-fillers and uniform morphology of the NCs showed that the ZrO-VB NPs were homogeneously dispersed in the polymer matrix in the nanosized scale. UV-Vis analysis shown that the the optical absorption were improved by evolution of ZrO-VB NPs content. The tensile strength of PVA film was increased significantly with increasing the ZrO-VB NPs content. Thermal gravimetric analysis confirmed that NCs displayed higher thermal stability than the pristine PVA. Also, water contact angle analysis indicated that the hydrophilicity of NC films was enhanced with increasing the concentration of ZrO NPs.
聚（聚乙烯醇）（PVA）基纳米复合材料（NCs）填充了各种重量百分比的改性氧化锆纳米粒子（NPs），维生素 B（VB）含量高达 7wt%，通过超声处理方法制备，然后浇铸成薄膜。超声处理是一种简单、安全、快速的方法，用于制备和改性过程。超声处理负责将 NPs 很好地均匀分散到 PVA 基体中，这是机械或磁力搅拌无法实现的。通过 X 射线衍射研究了聚合物 NCs 的形成和结构性能的变化。FT-IR 光谱表明，ZrO-VB NPs 可能与 PVA 主链发生相互作用，并且 NC 结构中存在与 PVA 和 ZrO NPs 相关的吸收带。纳米填料的分布和 NCs 的均匀形态表明，ZrO-VB NPs 在纳米级均匀分散在聚合物基体中。UV-Vis 分析表明，随着 ZrO-VB NPs 含量的增加，光学吸收得到了改善。PVA 薄膜的拉伸强度随着 ZrO-VB NPs 含量的增加而显著提高。热重分析证实 NCs 比原始 PVA 具有更高的热稳定性。此外，水接触角分析表明，NC 薄膜的亲水性随着 ZrO NPs 浓度的增加而增强。
