摘要
以嵌段聚合物P123为模板,ZrOCl2.8H2O和Ce(NO3)3.6H2O为原料,采用水热法合成了CeO2-ZrO2纳米材料,经400°C焙烧后利用油酸对其进行表面改性,然后将其均匀分散于环氧树脂中,制备了CeO2-ZrO2-环氧树脂杂化材料。采用X射线衍射(XRD)及氮气吸/脱附曲线研究了焙烧后的纳米CeO2-ZrO2材料。分析了油酸改性后CeO2-ZrO2介孔材料的红外光谱(FT-IR)、透射电镜(TEM)照片及其与水、CH2I2的接触角,探讨了油酸的改性机理。通过热重-差示扫描量热法(TG-DSC)表征了CeO2-ZrO2-环氧树脂杂化材料的热稳定性,测试了涂膜的性能。结果表明,无机介孔材料CeO2-ZrO2的平均孔径为5.47nm,比表面积达117.81m2/g。经油酸改性后,CeO2-ZrO2的亲油性能得到改善,与CH2I2的接触角为32.6°,油酸改性机制包括物理吸附作用和化学键合作用。所制备的CeO2-ZrO2-环氧树脂杂化材料的玻璃化转变温度为376°C,涂膜的各项性能得到有效改善。
Abstract： A CeO2-ZrO2 nano-material was synthesized by hydrothermal method with block polymer P123 as template and ZrOC12.8H20 and Ce（NOa）a.6H20 as raw materials, and then modified by oleic acid after calcining at 400 ℃. A CeOE-ZrOE-epoxy hybrid was prepared by well dispersing the oleic acid-modified CeOE-ZrO2 material in epoxy resin. The calcined nano-CeO2-ZrO2 material was studied by X-ray diffraction （XRD） and N2 adsorption/ desorption curve measurement. The oleic acid-modified mesoporous CeOE-ZrO2 material was examined by Fourier- transform infrared （FT-IR） spectroscopy, transmission electron microscopy （TEM）, and contact angle measurement againstwater and CH212. The mechanism of oleic acid modification was discussed. The thermal stability of the CeO2-ZrOz- epoxy hybrid was characterized by thermogravimetry- differential scanning calorimetry （TG-DSC） and its coating performance was tested. The results showed that the mesoporous CeO2-ZrO2 material has an average pore size of 5.47 nm and a specific surface area up to 117.81 m2/g. The oleic acid-modified CeO2-ZrO2 has an improved lipophilicity and a contact angle of 32.6° against CHzlz. The mechanism of oleic acid modification involves physical adsorption and chemical interaction. The CeO2-ZrO2-epoxy hybrid has a glass transition temperature of 376 ℃, and its cued coating has improved properties.
出处
《电镀与涂饰》
CAS
CSCD
北大核心
2012年第10期63-67,共5页
Electroplating & Finishing
