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Synthesis and Performances of Polymer β-cyclodextrin Derivatives

Author: WangShaoBao
Tutor: ZhangXiaoMei
School: Anhui University of Technology
Course: Applied Chemistry
Keywords: β-cyclodextrin polymer Synthesis Adsorption Performance
CLC: O636.1
Type: Master's thesis
Year: 2009
Downloads: 207
Quote: 1
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Abstract


β-cyclodextrin polymer can maintain specific supramolecular properties of the parent molecule, also showed a unique effect of the polymer, with a wide range of uses in the separation and analysis technology, biomedical engineering, environmental protection and other fields. The papers on the two types of β-cyclodextrin polymer containing a carboxyl group and an amino group, i.e. the polymerization of carboxymethyl-β-cyclodextrin (PCM-β-CD) and the polymerization of N-(2 - aminoethyl) amino β-ring dextrin (PAE-β-CD) Synthesis and adsorption of organic pollutants Fuchsine and phenol of the performance of the following research. A study of different degrees of substitution of carboxymethyl-β-cyclodextrin (CM-β-CD) and N-(2 - aminoethyl) amino-β-cyclodextrin (AE-beta-CD) Synthesis conditions, to obtain the corresponding product. 2 substituted with epichlorohydrin with different degrees CM-beta-CD and amino protecting the AE-beta-CD crosslinking polymerization, synthesis of the two types having different substituted and different degree of crosslinking of PCM-beta-CD and PAE-β-CD, phenol - sulfuric acid method determination of the degree of crosslinking of the product, the structure of the product was characterized by FT-IR and XRD. 3. Study the molecular structure of polymeric β-cyclodextrin derivatives (degree of substitution and cross-linking degrees) affect its adsorption of organic pollutants Fuchsine and phenol adsorption QA. The results show that: the degree of substitution of β-cyclodextrin derivatives increased adsorption amount of QA; polymer crosslinking degree of no significant impact to the QA. The adsorption conditions PCM-β-CD Fuchsine adsorption, PAE-β-CD adsorption of basic fuchsin and phenol adsorption performance impact. The results show that: the oscillation of two hours, PCM-β-CD fuchsin adsorption to reach equilibrium; pH 5-6 adsorption better. Large concentration of Fuchsine initial, QA increase; initial concentration 250mg.L-1 oscillation 2h, pH of 5.43, QA 54.7 mg · g-1. Shaking for 1 hour, PAE-β-CD to basic fuchsin and phenol adsorption equilibrium; pH 5 to 7:00 adsorption better. Basic fuchsin and phenol initial concentration, QA increase; the basic fuchsin initial concentration of 250 mg · L-1, the oscillation 1h pH was 5.21 QA 17.95 mg · g-1; phenol initial concentration of 500mg · L-1, the oscillation 1h pH was 6.26 QA 15.79 mg g-1 5 PCM-β-CD PAE-β-CD the water by Fuchsine and phenol adsorption equilibrium model. The results show that the available Freundlich model to describe. 25 ℃, PCM-β-CD adsorption the the basic fuchsin Freundlich equation fit the form of: shows that basic fuchsin adsorption on the surface of the PCM-β-CD easily, and its adsorption preferential adsorption the Freundlich equation fitting; 10 ℃, PAE-β-CD the adsorption Fuchsine and phenol were in the form of: 1 (n = 1.5978,1.3138) shows, basic fuchsin and phenol in the AE-β-CD The adsorption on the polymer surface is easy, but the adsorbed non-promotions adsorption.

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CLC: > Mathematical sciences and chemical > Chemistry > Polymer chemistry ( polymer ) > Natural polymers ( polymer ) > Polymer polysaccharides
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