物理化学学报 >> 2004, Vol. 20 >> Issue (08S): 897-901.doi: 10.3866/PKU.WHXB200408zk01

研究论文    下一篇

纳米结构型PMAA/CdS复合微球的微凝胶模板法制备研究

张颖;房喻;林书玉;刘静;杨娟玲   

  1. 陕西师范大学化学与材料科学学院; 陕西师范大学应用声学研究所,西安 710062
  • 收稿日期:2003-05-08 修回日期:2003-06-05 发布日期:2004-08-15
  • 通讯作者: 房喻 E-mail:yfang@snnu.eud.cn

Preparation of Spherical Nano-structured PMAA/CdS Composites by a Microgel Template Method

Zhang Ying;Fang Yu;Lin Shu-Yu;Liu Jing;Yang Juan-Ling   

  1. School of Chemistry and Materials Science; Applied Acoustics Institute, Shaanxi Normal University, Xi′an 710062
  • Received:2003-05-08 Revised:2003-06-05 Published:2004-08-15
  • Contact: Fang Yu E-mail:yfang@snnu.eud.cn

摘要: 以微凝胶为模板,利用微凝胶三维网络结构对无机沉积反应的限域和导向作用,制备了具有核-壳结构的聚甲基丙烯酸/硫化镉(PMAA/CdS)有机/无机复合微球材料.复合微球的制备包含两个基本步骤:首先,以反相乳液聚合法得到包含Cd(Ac)2的聚甲基丙烯酸微凝胶;然后,在搅拌过程中向反应体系中缓慢通人H2S气体,使镉离子沉积为CdS,经洗涤处理后得到PMAA/CdS复合微球. SEM观察表明,复合微球表面呈现均一的微纳米结构,这种结构可因微球制备条件的不同而不同.而且,超声处理可使微球表面趋于光滑. X射线衍射分析表明复合微球中CdS处于晶态,具有立方结构.此外,复合微球因CdS的存在而具有光致发光特性.

关键词: 微凝胶, 有机/无机复合材料, 聚甲基丙烯酸, 模板法, 硫化镉

Abstract: Poly(methacrylic acid)/CdS (PMAA/CdS) spherical organic-inorganic composites with core-shell structures were prepared by utilizing polymeric microgel template effect on inorganic precipitation. The composites were produced via two steps. PMAA microgels containing Cd(Ac)2 were prepared by an inverse emulsion polymerization method. Then, H2S was introduced slowly into the system under stirring, and the metal ions were deposited within the microgels as CdS. The PMAA/CdS composites were obtained after washing treatment. The surface of the composites exhibited uniform micro- and nano-structured morphologies. Moreover, the surface structure of the micro-particles can be adjusted by changing the preparing conditions. In addition, ultrasound treatment makes the surface of particles much more smooth. XRD analysis shows that CdS in the composite is in crystalline state and is of face-centered structure. Furthermore, the composites are photoluminescence active due to presence of CdS.

Key words: Micro-gels, Organic-inorganic composites, Poly(methacrylic acid),  Template method, CdS