聚丙烯酸对Eu^3+掺杂纳米羟基磷灰石的表面改性研究  

Surface Modification of Eu^3+Doped Nano-Hydroxyapatite by Polyacrylic Acid

作　　者：廖丽璇 张小君 韩颖超[2] LIAO Lixuan;ZHANG Xiaojun;HAN Yingchao(School of Matreials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China;State KeyLaboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China)

机构地区：[1]武汉理工大学材料科学与工程学院,武汉430070 [2]武汉理工大学材料复合新技术国家重点实验室,武汉430070

出　　处：《硅酸盐通报》2020年第6期1923-1929,共7页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(51672206)。

摘　　要：为了改善Eu3+掺杂纳米羟基磷灰石(Eu-nHAP)在水相体系中的分散悬浮性能,以聚丙烯酸(PAA)为分散剂,结合超声技术对其进行表面改性处理。采用傅里叶红外光谱(FTIR)、X射线衍射(XRD)、高分辨透射电子显微镜(HRTEM)、扫描电子显微镜(SEM)、动态光散射(DLS)、荧光分光光度计对样品进行了表征。结果表明,PAA可以通过羧基与Eu-nHAP表面钙离子间的静电相互作用结合在Eu-nHAP的表面,PAA的交联作用将长80~120 nm、宽8~10 nm的Eu-nHAP组装成长380~460 nm、宽120~180 nm的短棒状聚集体,进而通过PAA的空间位阻效应将Eu-nHAP分散悬浮在水相中,获得了分散性、稳定性良好的悬浮液。不同浓度PAA表面改性没有明显改变Eu-nHAP的晶相组成和晶粒尺寸,也没有对其荧光性能产生明显影响。Polyacrylic acid(PAA)was used for the surface modification of Eu3+doped nano-hydroxyapatite(Eu-nHAP)in order to improve its dispersion property in aqueous phase.The samples were characterized by Fourier transform infrared spectroscopy(FTIR),X-ray diffraction(XRD),high resolution transmission election microscope(HRTEM),scanning election microscope(SEM),dynamic light scattering(DLS)and fluorescence spectrophotometer.The results show that PAA is bonded to the surface of Eu-nHAP through electrostatic interaction between carboxyl of PAA and calcium ion on the surface of Eu-nHAP.The cross-linking effect of PAA assembles Eu-nHAP paticles(8-10 nm×80-120 nm)into short rod-like aggregates(120-180 nm×380-460 nm).Then Eu-nHAP disperses and suspends in water through steric effect of PAA to obtain a suspension with good dispersibility and stability.The surface modification of PAA with different concentration doesn’t change the crystalline phase composition,crystalline size and fluorescence property of Eu-nHAP obviously.

关 键 词：纳米羟基磷灰石 EU^3+ 聚丙烯酸 表面改性 超声技术 

分 类 号：TQ174[化学工程—陶瓷工业] R318.08[化学工程—硅酸盐工业]