| Attapulgite was widely used due to its excellent properties. Hydrophilic character of attapulgite limits its further applications. Up to the date, there is still no a low-cost and green method of organic modification of attapulgite. This study is focused on the organic modification of attapulgite by a hydrothermal method. From the treatment of phenol wastewater and compatibility of polyacrylonitrile solution, the result of organic modification is evaluated. The main conclusions are given as followings:(1) It was investigated the effect of reaction temperature, dope concentration, reaction time, pH value on the preparation process of composite materials. The results show that a carbon layer with -CH group grows on the surface of attapulgite. When the pH value is 2.5, the content of loaded carbon is less. While the pH value is 13, the carbon-coated attapulgite microspheres are observed.(2) Adsorption behavior of phenol on attapulgite/carbon composite materials was investigated. The results suggested that the component of composite materials, solid-liquid ratio, pH value, adsorption time have an important influence on the adsorption capabilities. The removal efficiency of phenol on composite material is better than that of attapulgite. The corresponding adsorption behavior can be better described by Langmuir model.(3) The effect of carbon additives on the viscosity of polyacrylonitrile (PAN) was studied. The additives include AT/C, AT, multiwalled carbon nanotubes (MCNT) and carbon black. The results indicate that the viscosity of PAN solution increases along with the increase of additive content. Compared with natural AT, the viscosity of PAN solution with AT/C is higher. Further, the stability of solution is better.
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