Fe3O4@SiO2@IPDI-HEA改性水性有机硅聚氨酯光固化膜的性能

Properties of Fe3O4@SiO2@IPDI-HEA Modified Waterborne Polysiloxane-Polyurethane UV-Cured Film

摘要:

摘要：设计以Fe3O4纳米粒子为核、丙烯酸酯为壳，通过溶剂热法制备了Fe3O4@SiO2@IPDI-HEA纳米粒子。通过红外光谱（IR）、透射电子显微镜（TEM）和 X射线衍射（XRD）对其结构进行了表征，通过光差热扫描（photo-DSC）和热重分析（TGA）等考察了该纳米粒子对水性有机硅聚氨酯光固化体系性能的影响。结果表明：Fe3O4@SiO2@IPDI-HEA粒子的加入，对体系的光聚合性能没有明显影响，但可明显提高固化膜的耐热性和拉伸强度，当Fe3O4@SiO2@IPDI-HEA的质量分数为1.5％时，固化膜的初始分解温度（T5％）增加了21.9 ℃，拉伸强度增加了6.9 MPa。并且，Fe3O4@SiO2@IPDI-HEA可以赋予光固化膜一定的电磁性能，当频率在0~107 Hz的频率范围内时，其介电常数均在4以上。

Abstract:

Abstract: Fe3O4@SiO2@IPDI-HEA nanoparticle was prepared by solvothermal method with Fe3O4 nanoparticle as the core and acrylate as the shell. The structure of the nanoparticle was characterized by IR, TEM and XRD. The effect of the nanoparticle on the performances of water-borne polysiloxane-polyurethane photocuring system were studied by photo-DSC and TGA. The results show that the addition of Fe3O4@SiO2@IPDI-HEA particle did not obviously influence the photopolymerization property of the system, but improved significantly the heat resistance and tensile strength of the cured film. When the mass fraction of Fe3O4@SiO2@IPDI-HEA was 1.5%, the initial decomposition temperature (T5%) of the cured film was increased by 21.9 ℃, and the tensile strength was enhanced by 6.9 MPa. Moreover, Fe3O4@SiO2@IPDI-HEA can impart certain electromagnetic properties to the UV-cured film. When the frequency is in the range of 0 to 107 Hz, the dielectric constant is above 4.