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Synthesis and Characterization of Intelligent Polymer Hydrogels and Preliminary Study on Their Applications in Analytical Chemistry

Author: ZhengJie
Tutor: ZhaoYiBing
School: Xiamen University
Course: Analytical Chemistry
Keywords: β-cyclodextrin N- isopropyl acrylamide Smart Hydrogel Molecular Recognition Application prospects
CLC: TQ427
Type: Master's thesis
Year: 2007
Downloads: 295
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Abstract


This article describes the identification of the intelligence of the poly-N-isopropyl acrylamide (PNIPAM) and β-cyclodextrin (β-CD) of the guest molecule and the envelope characteristic combination, synthesis Three multifunctional molecular recognition ability β-cyclodextrin smart hydrogel, a preliminary study and the three gel material intelligence and the envelope of the guest molecules capabilities and analysis application prospects. The text is divided into four chapters. Chapter smart polymer gel, polymer cyclodextrin and polycyclic aromatic hydrocarbons detected. First, the principle of volume phase transition, from the solvent, temperature, pH, light radiation, electric, magnetic, and other aspects of the intelligent polymer gel environmental sensitivity, also introduced Intelligent polymer gels in biomedical engineering, controlled drug delivery, immunoassay, biological separation and analysis application. Secondly, cyclodextrins and cyclodextrin derivatives and cyclodextrin polymer applications in analytical chemistry. Thirdly, the nature of polycyclic aromatic hydrocarbons, the structure of the brief, the method of determination of polycyclic aromatic hydrocarbons. Proposed on the basis of the literature review, the thesis research purposes and research ideas. The second chapter to carry out the synthesis and characterization of propylamine on behalf of N-isopropyl acrylamide-N-allyl-β-cyclodextrin copolymer hydrogels (ACD / PNIPAM), and explore the ACD / PNIPAM hydrogel pyrene the interaction and its application in environmental remediation prospects. Modification, first by sulfonylating 6 mono-modified the sulfonylation β-CD (6-OTs-β-CD), and then the reaction of 6-OTs-β-CD and allylamine, allylamine modified β -CD monomer N-allylamine substituting-β-cyclodextrin (ACD). Finally legally by radical polymerization of the ACD and the N-isopropyl acrylamide ((NIPAM) copolymerization, β-CD-modified smart hydrogel ACD / PNIPAM. By nuclear magnetic resonance (NMR), infrared spectroscopy (IR) mass spectrometry (MS) analysis testing methods to characterize the ACD / PNIPAM hydrogels using electron microscopy analysis of the ACD / PNIPAM copolymer type appearance using fluorescence spectroscopy to study the ACD / PNIPAM hydrogels pyrene molecular recognition features, explore the prospects of its application in environmental analysis conducted in Chapter N-isopropyl acrylamide copolymer hydrogels - butyl-acid monoesterification,-β-CD (MAH-β- CD / PNIPAM) synthesis and characterization studies, and to explore the role of the envelope of the MAH-β-CD/PNIPAM hydrogel and polycyclic aromatic hydrocarbons guest molecule and its application prospects in the analysis of chemical First maleic anhydride (MAH), chemical modification, synthesis of β-CD out butenedioic monoesterification β-CD monomer (MAH-β-CD), and then by a redox radical initiator MAH-β-CD and NIPAM polymerization synthesized MAH-β-CD/PNIPAM copolymer hydrogel. MAH-β-CD monomers and copolymers were characterized using nuclear magnetic resonance (NMR), infrared spectroscopy (IR) and mass spectrometry (MS); electron microscopy the morphology of the observation MAH-p-CD/PNIPAM copolymer; investigated MAH-β-CD/PNIPAM hydrogel intelligent features, while taking advantage of fluorescence microscopy and fluorescence spectra of to study the MAH-β-CD/PNIAM hydrogel molecular recognition characteristics glue separation characteristics, as well as distinguish and were measured characteristics revealed MAH-β-CD/PNIAM hydrogel application prospects. conducted in Chapter N-isopropyl acrylamide-co-acrylic acid - ethanolamine-generation -β-CD ion polymer hydrogel (EAA-β-CD/AA/PNIPAM), synthesis and characterization, and to explore EAA-β-CD/AA/PNIPAM hydrogel with polycyclic aromatic hydrocarbons in the envelope of the guest molecules role in the application prospects in analytical chemistry. First copolymer through the the NIPAM and small amount of AA, AA / PNIPAM, PNIPAM main chain belt can negatively ionized carboxyl (-COOH); followed with ethanolamine (EAA) sulfonylation modified 6-OTs,-beta-CD reacts N-ethanolamine substituting-β-CD (the EAA-beta-CD), β-CD tape can be positively ionized secondary amine (-NH-); Finally both through ion association interactions, the-COO - and-NH / sub> . - the form EAA-β-CD/AA/PNIPAM ion polymer. use Nuclear Magnetic Resonance (NMR), infrared spectroscopy (IR) and mass spectrometry (MS) to its monomer and ionic polymer characterized, morphology was observed by scanning electron microscopy the EAA-β-CD/AA/PNIPAM ionic polymers. Investigation hydrogel intelligent features, while using fluorescence microscopy and fluorescence spectroscopy to study the molecular recognition characteristics EAA-β-CD/AA/PNIPAM ion polymer hydrogel, separation characteristics, as well as the resolution and were measured characteristics reveals EAA-β-CD/AMPNIPAM ion polymer application prospects.

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