Relationships between surface energy and charge of surface-modified titanium and HAp formation
Relationships between surface energy and charge of surface-modified titanium and HAp formation
复制标题
DOI：
10.1016/j.apsusc.2018.09.162
复制
发表时间：
2019-01-28
影响因子：
6.7
通讯作者：
Ohtake, Naoto
中科院分区：
文献类型：
--
作者：
Hieda, Junko;Sakaguchi, Akira;Ohtake, Naoto
表面性质，如表面能和表面电荷对钛表面的骨形成很重要。研究了不同官能团(OH、NH_2、SH、CH_3、CH_2=CH、COOH)修饰的钛表面的表面性质(表面能和表面电荷)与初始的Ca~(2+)和PO~(3-)吸附量的关系。具有高表面能和高负Zeta电位的表面，如COOH和OH改性的钛表面，表现出高的钙离子吸附量。高表面能、高度负的Zeta电位和理想的化学计量比的Ca/P在初始吸附时导致HAP在COOH修饰的钛表面上析出。另一方面，在表面能较低的CH3和CH2=CH修饰的钛表面上，均相成核形成的HAP被吸附在SBF溶液中。
Surface properties such as surface energy and surface charge are important for bone formation on a Ti surface. We investigated the relationship between surface properties (surface energy and surface charge) and initial Ca2+ and PO43- adsorption amounts on titanium surfaces modified with various functional groups (OH, NH2, SH, CH3, CH2=CH, COOH). Surfaces with high surface energy and highly negative zeta potential, such as COOH and OH-modified Ti surfaces, exhibited high Ca2+ adsorption amounts. High surface energy, highly negative zeta potential, and an ideal stoichiometric Ca/P ratio during the initial adsorption of Ca2+ and PO43- led to the precipitation of HAp on COOH-modified Ti surfaces. On the other hand, the adsorption of HAp formed by homogeneous nucleation in the SBF solution occurs on the CH3 and CH2=CH-modified Ti surfaces with low surface energy.