Fe_3O_4@SiO_2@IPDI-HEA改性水性有机硅聚氨酯光固化膜的性能  

Properties of Fe_3O_4@SiO_2@IPDI-HEA Modified Waterborne Polysiloxane-Polyurethane UV-Cured Films

作　　者：张奇 操越[1] 孙芳[1] ZHANG Qi;CAO Yue;SUN Fang(Faculty of Science, Beijing University of Chemical Technology, Beijing 100029, China)

机构地区：[1]北京化工大学理学院,北京100029

出　　处：《精细化工》2019年第4期616-621,共6页Fine Chemicals

基　　金：国家重点研发计划(2017YFB0307800);国家自然科学基金(51273014);江苏省重点研发计划-产业前瞻与共性关键技术(BE2015058)~~

摘　　要：以Fe_3O_4纳米粒子为核、丙烯酸酯为壳,通过溶剂热法制备了Fe_3O_4@SiO_2@IPDI-HEA纳米粒子。通过IR、TEM和XRD对其结构进行了表征,通过光差热扫描(photo-DSC)和TGA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:Fe_3O_4@SiO_2@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Fe_3O_4@SiO_2@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6.9MPa。并且,Fe_3O_4@SiO_2@IPDI-HEA可以赋予光固化膜一定的电磁性能,当频率在0～(1×10~7) Hz内时,其介电常数均在4以上。Fe3O4@SiO2@IPDI-HEA nanoparticles were prepared by solvothermal method using Fe3O4 nanoparticles as cores and acrylate as shells. The obtained nanoparticles were characterized by IR, TEM and XRD. The effect of the nanoparticles on the performances of waterborne polysiloxane-polyurethane photocuring system was studied by photo-DSC and TGA. The results showed that the addition of Fe3O4@SiO2@IPDI-HEA particles had no obvious influence the photopolymerization property of the system, but could significantly improve the heat resistance and tensile strength of the cured film. When the addition amount of Fe3O4@Si O2@IPDI-HEA was 1.5%(mass fraction), the initial decomposition temperature(T5%) of cured film increased by 21.9 ℃, the tensile strength enhanced by 6.9 MPa. Moreover,Fe3O4@SiO2@IPDI-HEA could impart certain electromagnetic properties to the UV-cured film. When the frequency was in the range of 0 to 1×10^7 Hz, the dielectric constants of cured films were above 4.

关 键 词：磁性纳米粒子 光聚合 水性聚氨酯 吸波材料 功能材料 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业] TQ317.3