摘要
采用化学沉淀法合成了丝胶蛋白(SS)/羟基磷灰石(HAP)复合材料,并研究了矿化时间对复合材料的影响.X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)、透射电镜(TEM/HRTEM)和扫描电镜(SEM)表征结果表明:在较短的矿化时间内,合成的SS/HAP为直径约20 nm的复合颗粒;随着矿化时间的延长,这些复合颗粒能够沿轴方向组装并融合成类牙釉结构的较大晶体.文章讨论了其可能的组装机制.
The silk sericin （SS）/hydroxyapatite （HAP） composite was synthesized via a chemical co-precipitation method. The effect of mineralization time on the formation of composite, including growth of crystal, aggregation and assembly of nanoparticles, was investigated using X-ray diffraction （XRD）, Fourier transform infrared （FT-IR） spectroscopy, transmission electron microscopy （TEM）, high-resolution transmission electron microscopy （HRTEM） and scanning electron microscopy （SEM）. The results revealed that the mineralization time could influence the size, morphology and assembly of SS/HAP composite, i.e., long mineralization time leading to the large composite particles with high hydroxyapatite crystallinity. A more interesting thing was that the rod-like composite particles with 300-500 nm in length and 50-80 nm in diameter were assembled along the c-axis by the small nanoparticles with a size of about 20 nm, which is very similar to the assembly of natural enamel. The formation mechanism of enamel-like microstructure of SS/HAP composite was proposed.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2009年第21期2500-2504,共5页
Acta Chimica Sinica
基金
长江学者和创新团队发展计划(No.IRT0654)
新世纪优秀人才支持计划(No.NCET070763)
973计划前期研究专项课题(No.2008CB617506)
钱江人才计划(No.2008R10006)资助项目
关键词
羟基磷灰石
丝胶蛋白
分子组装
类牙釉
hydroxyapatite
silk sericin
molecular assembly
enamel-like
