Hatami Mehdi, Yazdan Panah Mohammadreza
Polymer Research Laboratory, Department of Polymer Science and Engineering, University of Bonab, P.O. Box 5551761167, Bonab, Iran.
Polymer Research Laboratory, Department of Polymer Science and Engineering, University of Bonab, P.O. Box 5551761167, Bonab, Iran.
Ultrason Sonochem. 2017 Nov;39:160-173. doi: 10.1016/j.ultsonch.2017.04.028. Epub 2017 Apr 21.
In this study, phenol-formaldehyde (PF)/CeO nanocomposites (NC)s were prepared by in-situ polymerization of phenol and formaldehyde in alkali solution in the presence of surface modified CeO nanoparticles (NP)s by sonochemical assisted synthesis. The morphology and structure of PF/CeO NCs were characterized by using fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FE-SEM), atomic force microscopy (AFM), X-ray diffraction (XRD), and thermal analyses methods. It was found that due to the good dispersion of surface modified NPs in polymer matrix and the strong interfacial interaction between the CeO NPs and PF matrix, the thermal stability and thermo-mechanical properties of the PF/CeO NCs were greatly enhanced. FE-SEM and AFM analyses showed the uniform distribution of CeO NPs in PF matrix. The XRD patterns of NCs show the presence of crystalline CeO NPs in amorphous matrix. The thermal analysis results reveal that, with increases in the content of CeO NPs in PF matrix, the thermally stability factors of samples were drastically enhanced.
在本研究中，通过声化学辅助合成法，在表面改性的CeO纳米颗粒（NP）存在下，于碱性溶液中使苯酚和甲醛原位聚合，制备了苯酚-甲醛（PF）/CeO纳米复合材料（NC）。采用傅里叶变换红外光谱（FT-IR）、场发射扫描电子显微镜（FE-SEM）、原子力显微镜（AFM）、X射线衍射（XRD）和热分析方法对PF/CeO NC的形态和结构进行了表征。结果发现，由于表面改性的NP在聚合物基体中分散良好，且CeO NP与PF基体之间存在强界面相互作用，PF/CeO NC的热稳定性和热机械性能得到了极大提高。FE-SEM和AFM分析表明CeO NP在PF基体中分布均匀。NC的XRD图谱显示在非晶基体中存在结晶CeO NP。热分析结果表明，随着PF基体中CeO NP含量的增加，样品的热稳定性因子急剧提高。
