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Study on the Immobilization of Functional Molecule Onto PP Non-woven Fabrics and Their Adsorption Behavior

Author: WangLiLi
Tutor: TangHui
School: Kunming University of Science and Technology
Course: Applied Chemistry
Keywords: Polymer azide compound PP nonwoven Gelatin UV light fixed Tannic acid Adsorption
CLC: TS195.5
Type: Master's thesis
Year: 2010
Downloads: 75
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Abstract

This thesis of polyepichlorohydrin (PECH), polyvinyl chloride (PVC) and vinegar chloride resin as raw material, using a substitution reaction to introduce the azide group was prepared three kinds of polymer azide compound in its polymer skeleton, glycidyl azide polymer (GAP), polyvinyl chloride azide and the azide chlorine vinegar resin. Investigate and optimize the reaction conditions on polymer azide synthesis of azide compounds FTIR, XPS and thermal analysis to prove the azide group does the introduction of the polymer chain. In the resulting polymer azide compound for optical coupling agent, under UV irradiation, the gelatin molecules fixed to the PP nonwoven fabric, was obtained the corresponding PP nonwoven UV light fixed gelatin. Light fixed reaction conditions were optimized using single factor experiment. Experimental results show that the GAP the UV light fixed reaction optimized conditions were as follows: GAP (3) concentration of 8.3g / L and 12.5g / L, and the coating process is 11, the UV irradiation for 30 min, the amount of gelatin immobilization can be achieved 9.33g / g (L) and 3.59g / g and (R). The fixation reaction of the UV light of the azido PVC optimized conditions for: the azido PVC (4) concentration of 10 g / L, the coating process is 11, UV irradiation 30min, the gelatin solid load under the same conditions can reach 7.89 g / g (L) and 3.81g / g (R). The azido vinegar chloride resin UV light after the optimization of the fixed reaction conditions as follows: the azido vinegar chloride resin (4) concentration was 10g / L, the coating process is 11 to UV irradiation for 30 min the gelatin solid under the same conditions load to 6.10g / g (L) and 3.41g / g (R). This paper ninhydrin - amino acid spectrophotometric color non-woven PP were measured on the fixed amount of gelatin, water absorption swelling properties of PP nonwoven light fixed gelatin explore light fixed gelatin solid load fixed rate of water absorption and the amount of amino acids immobilized gelatin fixed rate and amino acid solid load and solid load was positively correlated the gelatin immobilized the greater the amount of light fixed product, lower water absorption. The tannic acid adsorption properties of PP nonwoven UV light fixed gelatin. At 20 ℃ 50mL200mg / L tannic acid adsorption dope solid loading was 0.79g / g (R) of the GAP light fixed gelatin 0.2g stirred to adsorb 3h, tannic acid Escape rate reached 92.4%, The amount of adsorption Q 0.0492g / g. Under the same conditions, the immobilized amount of 3.12g / g (R) of the azido PVC light fixed gelatin tannic acid Escape rate reached 96.6%, the amount of adsorption Q for 0.0514g / g. At room temperature, 100mL 200mg / l tannic acid adsorption dope, the immobilized amount of 2.34g / g (L) of the light of the azido vinegar chloride resin fixed gelatin 0.2g are stirring adsorption 24h, on the rate of the tannic acid Escape reached 97.7%, the adsorption amount Q for 0.1300g / g. Adsorption experimental results show that the gelatin solid load n of the adsorption properties of having significantly regularity, tannic acid adsorption dope concentration is lower, the adsorption time is longer the greater the feeding amount of PP nonwoven light fixed gelatin, tannic acid The amount of adsorption is also greater. Also part of PP nonwoven UV light fixed gelatin adsorption sample FTIR analysis, scanning electron microscopy (SEM) analysis, X-ray photoelectron spectroscopy (XPS) analysis and thermal analysis. FTIR results show that, PP nonwoven UV irradiated light fixed on gelatin azide group content of the vicinity of 2100cm-1 is significantly reduced or even disappear, and the group of the contributing source and content of the elements on each of the samples can be inferred from the results of XPS, to heat analysis of TG, DTG, DTA curves and analysis of the data showed that the gelatin molecules have been fixed to the PP nonwoven after its adsorption the tannic structure groups in the sample appear to prove the realization of tannic acid adsorption. SEM photographs clearly reveal the PP fiber surface morphology of larger changes in light fixed gelatin the PP fiber gap filling fixed gelatin, PP fiber diameter further thicken after adsorption of tannic acid, the surface is a layer of adsorbed qualitative wrapped confirmed tannic acid has been attracted to the light fixed gelatin surface.

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