Synthesis, Properties, and Antibacterial Activity of Zinc-Substituted Hydroxyapatite

IF 0.9 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY
M. V. Papezhuk, C. N. Ivanin, V. A. Volynkin, P. P. Yakupov, L. V. Vasil’eva
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Abstract

Hydroxyapatite (HA) and zinc-substituted hydroxyapatite (ZnHA) have been prepared via precipitation from solution. The lattice parameters of ZnHA (а, b = 9.41766 Å, с = 6.88048 Å) are about 0.001 Å smaller than those of HA (а, b = 9.41866 Å, с = 6.88158 Å). The change in the lattice parameters of the ZnHA studied confirms partial Zn2+ substitution for Ca2+ in the crystal lattice of hydroxyapatite. IR spectra indicated the presence of functional groups (OH and \({\text{PO}}_{4}^{{3 - }}\)) in the composition of HA. According to scanning electron microscopy data, the particle size of the ZnHA powder prepared via precipitation followed by heat treatment at 900°C is 200–400 nm. Energy dispersive X-ray microanalysis was used to determine the Ca/P and (Ca + Zn)/P ratios in HA and ZnHA: 1.68 and 1.66, respectively. The solubility of ZnHA in physiological saline was found to be twice that of HA, suggesting good ZnHA resorption in the human body. Tests of disk-shaped samples in SBF solution demonstrated active formation of a new calcium phosphate layer as a result of chemisorption of Ca2+, Mg2+, \({\text{HPO}}_{4}^{{2 - }}\), \({\text{PO}}_{4}^{{3 - }}\), and OH ions from solution. ZnHA exhibits activity for both gram positive (Bacillus cereus and Staphylococcus aureus) and gram negative (Escherichia coli and Acinetobacter calcoaceticus) microorganisms.

Abstract Image

采用沉淀法制备了羟基磷灰石(HA)和锌取代羟基磷灰石(ZnHA)。ZnHA的晶格参数(_,b = 9.41766 Å, _, r = 6.88048 Å)比HA (_, b = 9.41866 Å, _, r = 6.88158 Å)小约0.001 Å。ZnHA晶格参数的变化证实了羟基磷灰石晶格中部分Zn2+取代了Ca2+。红外光谱表明,HA的组成中存在官能团(OH -和\({\text{PO}}_{4}^{{3 - }}\))。扫描电镜数据显示,900℃热处理后沉淀法制备的ZnHA粉体粒径为200 ~ 400 nm。采用能量色散x射线微量分析测定了HA和ZnHA中的Ca/P和(Ca + Zn)/P比值分别为1.68和1.66。锌HA在生理盐水中的溶解度是HA的两倍,表明锌HA在人体中有良好的吸收。在SBF溶液中对圆盘状样品的测试表明,由于溶液中的Ca2+、Mg2+、\({\text{HPO}}_{4}^{{2 - }}\)、\({\text{PO}}_{4}^{{3 - }}\)和OH -离子的化学吸附,新的磷酸钙层积极形成。ZnHA对革兰氏阳性微生物(蜡样芽孢杆菌和金黄色葡萄球菌)和革兰氏阴性微生物(大肠杆菌和钙酸不动杆菌)均有活性。
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来源期刊
Inorganic Materials
Inorganic Materials 工程技术-材料科学:综合
CiteScore
1.40
自引率
25.00%
发文量
80
审稿时长
3-6 weeks
期刊介绍: Inorganic Materials is a journal that publishes reviews and original articles devoted to chemistry, physics, and applications of various inorganic materials including high-purity substances and materials. The journal discusses phase equilibria, including P–T–X diagrams, and the fundamentals of inorganic materials science, which determines preparatory conditions for compounds of various compositions with specified deviations from stoichiometry. Inorganic Materials is a multidisciplinary journal covering all classes of inorganic materials. The journal welcomes manuscripts from all countries in the English or Russian language.
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