CAJ | 학술논문

采用正硅酸乙酯（TEOS）水解法在羟基磷灰石粉体表面包覆SiO2进行表面改性,并通过扫描电镜（SEM）、透射电镜（TEM）、X射线衍射（XRD）、红外（FT-IR）、zeta电位和沉降实验等对样品的晶体结构、颗粒形貌进行了表征,结果表明涂层厚度约为3nm,包覆后的纳米粒子在水溶液中的胶体稳定性提高了5倍,SiO2在羟基磷灰石表面的吸附符合异质凝结机制。
채용정규산을지（TEOS）수해법재간기린회석분체표면포복SiO2진행표면개성,병통과소묘전경（SEM）、투사전경（TEM）、X사선연사（XRD）、홍외（FT-IR）、zeta전위화침강실험등대양품적정체결구、과립형모진행료표정,결과표명도층후도약위3nm,포복후적납미입자재수용액중적효체은정성제고료5배,SiO2재간기린회석표면적흡부부합이질응결궤제。
Nanophase hydroxyapatite（HAP） particles were coated with silica via the hydrolysis of tetraethyl orthosilicate（TEOS）.The nanocomposite particles were characterized by transmission electron spectroscopy（TEM）,scaning electronmicroscopy（SEM）,X-ray diffraction（XRD）,Fourier transform infrared（FT-IR） spectroscopy,sedimentation timeand zeta potential（ζ） studies.A sequential changes in infrared spectral features characteristic of HAP was accompanied by an increase in features characteristic of silica as revealed by FT-IR.The silica coating enhanced the colloidal stability of HAP in aqueous suspensions.This behavior can be explained based on a heterocoagulation coating mechanism in which silica clusters adsorb onto the HAP particle surface.