油酸修饰钨酸铅纳米晶的制备及超疏水性能研究  

Study on preparation and super-hydrophobicity of PbWO_4 nanocrystals modified by oleic acid

作　　者：朱小娜[1,2] 周元林[1,2] 杨文彬[1,2] 李迎军[1,2] 董发勤[2] 罗世凯[3] 

机构地区：[1]西南科技大学非金属复合与功能材料省部共建国家重点实验室培育基地,四川绵阳621010 [2]西南科技大学材料科学与工程学院,四川绵阳621010 [3]中国工程物理研究院化工材料研究所,四川绵阳621900

出　　处：《功能材料》2011年第4期696-699,共4页Journal of Functional Materials

基　　金：国家自然科学基金委员会-中国工程物理研究院联合基金资助项目(10876033)

摘　　要：用油酸作表面修饰剂,利用水热法制备了钨酸铅(PbWO4)纳米晶。研究了油酸用量对PbWO4纳米晶修饰效果的影响,并利用X射线衍射仪、扫描电子显微镜、红外光谱仪和接触角测试仪等对产物进行了表征。结果表明,修饰PbWO4纳米晶的油酸最佳用量为6%;样品结晶良好,平均粒径为32nm;表面修饰使得油酸分子中的—COOH和PbWO4纳米晶之间存在化学键结合;油酸修饰PbWO4纳米晶分散性好,无团聚现象;对水的润湿接触角达153.08°,具有超疏水性能,在有机溶剂中具有良好的分散稳定性。Using oleic acid as surface modifying agents,the PbWO4 nanocrystals coated with oleic acid were synthesized by hydrothermal method.The effects of amounts of oleic acid on the modification of nano-PbWO4 particles were also discussed.The as-prepared PbWO4 particles were characterized systematically by means of X-ray diffraction（XRD）,scanning electron microscope（SEM）,Fourier transform infrared spectroscopy（FT-IR） and contact angle analyzer.It was found that the optimum amount of oleic acid was 6%;the XRD patterns indicate that the well-crystallized PbWO4 nanocrystals can be obtained by using the given synthetic parameters,and the average diameter were about 32nm.The results revealed that the —COOH group of oleic acid had chemically reacted with the surface of PbWO4 nanocrystals via surface modification by FT-IR;the oleic acid modified PbWO4 nanocrystals had good dispersion and not reunited.Furthermore,the contact angle between the modified PbWO4 and water amounted to 153.08°,which showed that the modified PbWO4 owned super hydrophobic surfaces.And it had good dispersion and stability in organic solvents.

关 键 词：钨酸铅纳米晶 油酸 修饰 超疏水性 

分 类 号：TQ62[化学工程—精细化工]