PMMA/改性纳米氧化锌复合材料的制备及其性能研究

摘要

In this work,ZnO nanoparticles were synthesized by liquid phase precipitation and then modified with a titanate coupling agent.Poly (methyl methacrylate) (PMMA)/ZnO nanocomposites were prepared by solvent mixing of surface-modified ZnO nanoparticles with PMMA.The resulting nanocomposites were analyzed by Fourier-transform infrared spectroscopy and scanning electron microscopy.The effect of ZnO content on the surface hardness,optical performance,thermal properties and solvent resistance was investigated.The results indicated that the surface-modified ZnO nanoparticles were well dispersed in PMMA,and the surface hardness of the nanocomposites increased with increasing ZnO content at first and then tended to decrease.The addition of ZnO nanoparticles enhanced the heat resistance and thermal stability of the nanocomposites.The ultraviolet shielding performance and solvent resistance of the nanocomposites were improved remarkably with an increase of ZnO content,and however,their visible light transmittance did not seem to decrease significantly.%采用液相沉淀法制备了氧化锌(ZnO)纳米粒子,并用钛酸酯偶联剂对其进行了表面改性,然后再采用溶液共混法将其与聚甲基丙烯酸甲酯(PMMA)复合,制成了PMMA/ZnO纳米复合材料.利用红外光谱仪、扫描电子显微镜等对复合材料进行了表征,并研究了ZnO含量对复合材料表面硬度、光学性能、热性能及耐溶剂性能的影响.结果表明,改性后的ZnO纳米粒子在PMMA基体中分散良好;复合材料的表面硬度随ZnO含量的增加呈先增大后减小的趋势;紫外光屏蔽能力随ZnO含量的增加而显著增强,但可见光透过率仍然保持较高;ZnO纳米粒子的加入提高了复合材料的耐热性和热稳定性;耐溶剂性能随ZnO含量的增加而显著改善.