无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2026, Vol. 58 ›› Issue (2): 36-44.doi: 10.19964/j.issn.1006-4990.2025-0038

• 研究与开发 • 上一篇    下一篇

两步法制备抗菌纳米CaCO3@TiO2@Ag复合材料的研究

任国宇1(), 江素局2, 杨爱梅2, 朱勇2, 袁爱群1, 白丽娟1(), 农华飞3, 王雄3   

  1. 1.广西民族大学化学化工学院,广西 南宁 530006
    2.广西华纳新材料股份有限公司,广西 南宁 530103
    3.广西福宝信科技有限公司,广西平果 531400
  • 收稿日期:2025-01-20 出版日期:2026-02-10 发布日期:2025-06-13
  • 通讯作者: 白丽娟(1969— ),女,硕士,副教授,主要从事材料化学的研究;E-mail: 553029993@qq.com
  • 作者简介:任国宇(1999— ),男,硕士研究生,主要从事材料化学研究;E-mail:2235627810@qq.com
  • 基金资助:
    广西重点研发计划项目(桂科AB24010217);百色市科技开发项目(百科202432014);国家自然科学基金项目(21666006)

Study on preparation of antibacterial nano-CaCO3@TiO2@Ag composites by a two-step method

REN Guoyu1(), JIANG Suju2, YANG Aimei2, ZHU Yong2, YUAN Aiqun1, BAI Lijuan1(), NONG Huafei3, WANG Xiong3   

  1. 1.School of Chemistry and Chemical Engineering,Guangxi MinZu University,Nanning 530006,China
    2.Guangxi Huana New Material Co. ,Ltd. ,Nanning 530103,China
    3.Guangxi Fubaoxin Technology Co. ,Ltd. ,Pingguo 531400,China
  • Received:2025-01-20 Published:2026-02-10 Online:2025-06-13

摘要:

为提高碳酸钙的附加值并开拓其新的应用市场,以钛酸四丁酯、硝酸银为壳层原料,采用两步法制备抗菌纳米CaCO3@TiO2@Ag复合材料。考察反应温度、搅拌速率、银的负载量、反应时间、陈化时间等因素对银负载效果的影响并探讨负载机理。采用透射电子显微镜(TEM)、扫描电子显微镜(SEM)、能量色散X射线光谱(EDS)、X射线衍射(XRD)、X射线光电子能谱(XPS)、傅里叶变换红外光谱(FT-IR)等对产物进行表征。结果显示,最佳银负载的条件为反应温度为30 ℃、搅拌速率为350 r/min、Ag负载量为10%(质量分数)、反应时间为80 min、无需陈化。在最佳的负载条件下,无定形TiO2通过形成Ca—O—Ti化学键均匀负载在纳米碳酸钙表面,形成CaCO3@TiO2,然后Ag+在有机硅分子作用下经吸附-还原生成5~10 nm的银颗粒包覆在CaCO3@TiO2表面,获得纳米CaCO3@TiO2@Ag核壳结构。抗菌测试表明,在粉末涂料中纳米CaCO3@TiO2@Ag的抗菌性能达到GB/T 21866—2008《抗菌涂料(漆膜)抗菌性测定法和抗菌效果》中的I级标准。

关键词: 纳米CaCO3@TiO2@Ag, 核-壳结构, 抗菌性能

Abstract:

To enhance the value of calcium carbonate and develop its new application market,antibacterial nano-CaCO3@TiO2@Ag composites were fabricated by a two-step method using butyl titanate and silver nitrate as shell materials.The effects of reaction temperature,stirring speed,Ag loading capacity,reaction time,and aging time on the silver loading effect and loading mechanism were investigated.The products were characterized by transmission electron microscopy(TEM),scanning electron microscopy(SEM),energy dispersive X-ray spectroscopy(EDS),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS) and Fourier transform infrared spectroscopy(FT-IR).The results showed that the optimal loading conditions for Ag were as follows:reaction temperature of 30 ℃,stirring speed of 350 r/min,Ag loading capacity of 10%(mass fraction),reaction time of 80 min,without aging time.Under the optimized loading conditions,amorphous TiO2 was uniformly loaded on the surface of nano-calcium carbonate by forming Ca—O—Ti chemical bonds to form CaCO3@TiO2.Then Ag+ was adsorbed and reduced under the action of organosilicon molecules to produce 5~10 nm silver particles coated on the surface of CaCO3@TiO2,and nano-CaCO3@TiO2 @Ag core-shell structure was obtained.The antibacterial tests demonstrated that the antimicrobial performance of nano-CaCO3@TiO2@Ag in powder coatings met the class I standard as outlined in GB/T 21866—2008 “Test method and effect for antibacterial capability of paints film”.

Key words: nano-CaCO3@TiO2@Ag, core-shell structure, antibacterial property

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