高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (S1): 251.

• Chemistry in Materials Sciences • 上一篇    下一篇

Crosslinking Reaction in the Formation of Porous Clays

DAI Jing-Cao, WU Hang-Yu, XIAO Zi-Jing, HUANG Ji-Tai   

  1. Institute of Materials Physical Chemistry, Huaqiao University, Quanzhou 362011
  • 出版日期:2000-12-31 发布日期:2000-12-31
  • 基金资助:

    This work was supported by the National Natural Science Foundation of China (59672030) and the Provincial Natural Science Foundation of Fujian (E9810010).

Crosslinking Reaction in the Formation of Porous Clays

DAI Jing-Cao, WU Hang-Yu, XIAO Zi-Jing, HUANG Ji-Tai   

  1. Institute of Materials Physical Chemistry, Huaqiao University, Quanzhou 362011
  • Online:2000-12-31 Published:2000-12-31
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (59672030) and the Provincial Natural Science Foundation of Fujian (E9810010).

摘要:

Clay minerals are a class of hydrous layer aluminosilicates of the so-called phyllosilicate[1] family made up of two basic types of layers, the SiO4 tetrahedral sheet and the Al2(OH)6[or Mg3(OH)6] octahedral sheet, many of which posses interlayer cations capable of exchanging reaction with other cations. The preparation of porous clays are based on this reactivity of exchangeable interlayer cations by using the intercalation of polycations such as Al137+ oligomers[2] into the galleries of clay minerals to form a microporous materials[3] Here we reported a study on the interlayered crosslinking of a 2:1 type montmorillonites with a hydrolysed polycations Al in the formation of porous clays. Na-montmorillonite gel (Na-mont, particle size<2 μ) were purified by using sedimentation of Na-bentonite fines (400 mesh, Zhejiang, China) and subsequent extensively washing to remove any soluble Na+. Hydrolysed polycations Al was prepared by NaOH hydrolysis of AlCl3 solutions in a condition[2] of OH/Al=2.0 and then aging at 70-90℃ for 4 h by the following process[3].

Abstract:

Clay minerals are a class of hydrous layer aluminosilicates of the so-called phyllosilicate[1] family made up of two basic types of layers, the SiO4 tetrahedral sheet and the Al2(OH)6[or Mg3(OH)6] octahedral sheet, many of which posses interlayer cations capable of exchanging reaction with other cations. The preparation of porous clays are based on this reactivity of exchangeable interlayer cations by using the intercalation of polycations such as Al137+ oligomers[2] into the galleries of clay minerals to form a microporous materials[3] Here we reported a study on the interlayered crosslinking of a 2:1 type montmorillonites with a hydrolysed polycations Al in the formation of porous clays. Na-montmorillonite gel (Na-mont, particle size<2 μ) were purified by using sedimentation of Na-bentonite fines (400 mesh, Zhejiang, China) and subsequent extensively washing to remove any soluble Na+. Hydrolysed polycations Al was prepared by NaOH hydrolysis of AlCl3 solutions in a condition[2] of OH/Al=2.0 and then aging at 70-90℃ for 4 h by the following process[3].

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