Spin-coating synthesis and characterization of Zn-doped hydroxyapatite/polylactic acid composite coatings
Spin-coating synthesis and characterization of Zn-doped hydroxyapatite/polylactic acid composite coatings
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Zn掺杂羟基磷灰石/聚乳酸复合涂层的旋涂合成及表征
DOI：
10.1016/j.surfcoat.2016.09.021
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发表时间：
2016
影响因子：
5.4
通讯作者：
Yuan QH
中科院分区：
文献类型：
--
作者：
Yuan Qiuhua;Wu Jianbo;Qin Caoping;Xu Anping;Zhang Ziqiang;Lin Songxin;Ren Xiangzhong;Zhang Peixin;Yuan QH
采用旋涂法制备锌掺杂羟基磷灰石/聚乳酸（HA/PLA）复合涂层，近年来很少有人研究。采用化学沉淀法制备了掺锌羟基磷灰石（Zn-doped HA）粉体，并采用旋涂法在不锈钢基体上制备了掺锌羟基磷灰石/聚乳酸（Zn-doped HA/PLA）复合涂层。研究了在600 ° C空气中热处理对Zn掺杂HA/PLA复合涂层组成和形貌的影响。采用X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）、X射线能量色散谱（EDX）、透射电子显微镜（TEM）和X射线光电子能谱（XPS）对样品进行了表征。结果表明，Zn2+离子取代了部分Ca2+离子，成功地掺杂到羟基磷灰石晶格中。合成的羟基磷灰石纳米颗粒呈棒状，而Zn离子的取代抑制了Zn掺杂HA晶体的生长，使其尺寸减小。Zn掺杂HA/PLA复合涂层在600 ° C下烧结1 h后，表面呈现均匀的多孔结构，厚度约为60 μ m。在复合涂层中引入聚乳酸可以抑制金属基体在高温热处理过程中对羟基磷灰石分解的催化作用。
Zn-doped hydroxyapatite/polylactic acid (HA/PLA) composite coatings fabricated by spin-coating technique have rarely been studied by other researchers in recent years. In this study, Zn-doped hydroxyapatite (Zn-doped HA) powder were synthesized by chemical precipitation method, and then Zn-doped hydroxyapatite/polylactic acid (Zn-doped HA/PLA) composite coatings were coated on stainless steel substrates using a spin-coating technique for the first time. The effects of heat treatment in air at 600 °C on the composition and morphology of Zn-doped HA/PLA composite coatings with a series of molar ratios of zinc (0 mol%, 5 mol%, 10 mol%, 15 mol% and 20 mol%) were studied. The obtained samples were characterized by means of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The results showed that Zn2 +ions had replaced the partial Ca2 +ions and were doped into hydroxyapatite lattice successfully. The synthetic hydroxyapatite nanoparticles showed rod-like morphology, whereas the substitution of the Zn ions restrained the growth of Zn-doped HA crystal and decreased its size. The surface morphology of Zn-doped HA/PLA composite coatings after sintering at 600 °C for 1 h exhibited a uniform, porous structure with a thickness of 60 μm or so. The introduction of PLA in composite coatings could keep metal substrates from catalyzing the decomposition of HA caused by high temperature heat treatment.