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Synthesis and Application of Attapulgite/Carbon Composite Materials

Author: ShengLiHua
Tutor: WuXuePing
School: Hefei University of Technology
Course: Chemical processes
Keywords: Attapulgite Glucose Phenol Polyacrylonitrile Hydrothermal carbonization
CLC: TB332
Type: Master's thesis
Year: 2009
Downloads: 246
Quote: 0
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Abstract


Attapulgite due to a series of excellent performance in various fields has been widely used. However, attapulgite highly hydrophilic , weaker affinity to organics . Is still the lack of a low-cost, environmentally friendly method of organically modified attapulgite . To solve this problem , the paper with glucose as carbon source, for the first time by hydrothermal carbonization method organically modified attapulgite , and low concentrations of phenol from wastewater treatment and polyacrylonitrile solution compatibility perspective on organic modification effect evaluation. Main contents and conclusions are as follows : ( a ) a detailed examination of the glucose concentration, reaction temperature, reaction time, pH value on attapulgite / carbon composite material preparation process. The results show that : with increasing temperature (> 160 ℃), the reaction time , the glucose concentration increases, attapulgite crystal surface carbon layer is getting thicker . In strongly acidic (pH = 2.5) conditions, attapulgite surface load less carbon particles , while in the strongly alkaline (pH = 13) conditions, to obtain a single crystal is attapulgite which carbon microspheres coated morphology . The surface of the composite material containing an organic functional group such as -CH . ( 2 ) study the attapulgite / carbon composite materials as adsorbents Phenol Wastewater effect. The results showed that: the composite material components , solid-liquid ratio , pH and adsorption time have a significant effect on the adsorption . Compared with Attapulgite ore composites greatly improved removal of phenol , indicating attapulgite organophilic improved significantly. Adsorption of phenol composite behavior can be described with the Langmuir adsorption model . ( 3 ) attapulgite / carbon composite materials as polyacrylonitrile solution additives, study its effect on the viscosity of polyacrylonitrile solution were studied , and with attapulgite ore and other commonly used polymer solution additives ( multi-walled carbon nanotubes (MCNT ) , carbon black (CB)) were compared. Found : PAN solution viscosity with the additive content increases almost linearly with increasing . With the extension of storage time , adding attapulgite ore PAN solution stratification occurred while adding composite PAN solution no stratification , the relative time that the latter has good stability . Polymer solution with other commonly used additives MCNT and CB compared to the viscosity of the solution after adding composite materials increased by a big margin .

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CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Composite materials > Non-metallic composite materials
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