首页> 外文期刊>Applied clay science >Preparation of layered double hydroxides intercalated with organic anions and their application in LDH/poly( butyl methacrylate) nanocomposites
【24h】

Preparation of layered double hydroxides intercalated with organic anions and their application in LDH/poly( butyl methacrylate) nanocomposites

机译:嵌入有机阴离子的层状双氢氧化物的制备及其在LDH /聚甲基丙烯酸丁酯纳米复合材料中的应用

获取原文
获取原文并翻译 | 示例
       

摘要

Layered double hydroxides (LDHs) intercalated with monomer anions containing reactive vinyl group, namely acrylate, methacrylate (MA), 2-acrylamido-2-methyl-1-propanesulfonate (AMPS), and 4-vinyl-benzoate (VB), polymerization initiator, 4,4'-azobis(4-cyanopentanoate), and hydrophobizing agent, dodecyl sulphate (DS) were prepared by an anion exchange reaction, in which the coprecipitated Mg-Al-NO_3 and Zn-Al-NO_3 hydrotalcite-like compounds with M~Ⅱ/Al molar ratio of 2 were used as precursors. The LDHs intercalated with MA, VB and DS anions were also prepared by direct coprecipitation. The intercalated LDHs were used as co-monomers or initiators for the preparation of LDH/poly(butyl methacrylate) nanocomposites; in situ emulsion polymerization and solution polymerization in 1-methyl-2-pyrolidone or the mixture of dimethylformamide and formamide were applied. Nanostructured hybrid materials containing a low amount (1-5 wt.%) of the inorganic filler were obtained; the best dispersion of LDH nanoparticles was observed in products prepared by solution polymerization in the mixture of dimethylformamide and formamide (50/50 v/v). Furthermore, the LDHs co-intercalated with monomer (MA or AMPS) and hydrophobic DS anions were prepared; at least a low amount of monomer anions has to be intercalated in the LDH interlayers in order to achieve an exfoliation of the ordered LDH structure. A modification of intercalated LDHs with porphyrin anions and the application of modified products in nanocomposite preparation were also examined. The photoactive LDH/poly(butyl methacrylate) nanocomposites producing singlet oxygen were obtained by this way.
机译:层状双氢氧化物(LDHs)插入含有反应性乙烯基的单体阴离子中,即丙烯酸引发剂,甲基丙烯酸酯(MA),2-丙烯酰胺基-2-甲基-1-丙烷磺酸盐(AMPS)和4-乙烯基苯甲酸酯(VB),聚合引发剂,4,4'-偶氮双(4-氰基戊酸酯)和疏水剂十二烷基硫酸盐(DS)通过阴离子交换反应制备,其中共沉淀的Mg-Al-NO_3和Zn-Al-NO_3类水滑石与M〜Ⅱ/ Al的摩尔比为2。还可以通过直接共沉淀制备与MA,VB和DS阴离子插入的LDH。插入的LDHs被用作共聚单体或引发剂,用于制备LDH /聚(甲基丙烯酸丁酯)纳米复合材料。在1-甲基-2-吡咯烷酮或二甲基甲酰胺和甲酰胺的混合物中进行原位乳液聚合和溶液聚合。获得了含有少量(1-5重量%)无机填料的纳米结构杂化材料;在溶液聚合过程中,在二甲基甲酰胺和甲酰胺(50/50 v / v)的混合物中观察到LDH纳米颗粒的最佳分散。此外,制备了与单体(MA或AMPS)和疏水性DS阴离子共嵌入的LDHs。为了实现有序的LDH结构的剥离,必须在LDH中间层中插入至少少量的单体阴离子。还研究了用卟啉阴离子对插入的LDHs的修饰及其在纳米复合材料制备中的应用。通过这种方式获得了产生单线态氧的光活性LDH /聚(甲基丙烯酸丁酯)纳米复合材料。

著录项

  • 来源
    《Applied clay science》 |2010年第2期|260-270|共11页
  • 作者单位

    Department of Solid State Chemistry, Institute of Chemical Technology, Prague, Technicka 5, 166 28 Prague, Czech Republic;

    Department of Solid State Chemistry, Institute of Chemical Technology, Prague, Technicka 5, 166 28 Prague, Czech Republic;

    Institute of Inorganic Chemistry of the AS CR, v.v.i., 250 68 Rez, Czech Republic;

    J. Heyrovsky Institute of Physical Chemistry of the AS CR, v.v.i., DolejSkova 3, 182 23 Prague, Czech Republic;

    Institute of Macromolecular Chemistry of the AS CR, v.v.i., Heyrovskeho nam. 2, 162 06 Prague, Czech Republic;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    layered double hydroxides; intercalation; poly(butyl methacrylate) nanocomposite; photoactive materials; singlet oxygen;

    机译:层状双氢氧化物;插层聚(甲基丙烯酸丁酯)纳米复合材料;光敏材料;单线态氧;
  • 入库时间 2022-08-17 13:55:24

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号