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Preparation and Properties of RE hybrid hydrogel

Author: JiaoLianLian
Tutor: ZhangMing
School: Yangzhou University
Course: Materials Physics and Chemistry
Keywords: Sensitive hydrogels Acrylamide Deformation displacement Rare earth content Acrylic acid Ionic strength Gel system Swelling ratio Hybrid Rare earth ions
CLC: TQ427.26
Type: Master's thesis
Year: 2007
Downloads: 162
Quote: 0
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Abstract


P(AA/AM) hydrogels bonded Rare-Earth carboxylic were prepared by the method of free-radical solution polymerization, and the Rare-Earth were added to hydrogels by the bonding-type. In the end, the hydrogels we prepared were of uniformity, transparency and elasticity. On the base of traditional hydrogels, we made a good using of the excellent characteristics of Rare-Earth that including light, electricity and magnetism. The goal was to intelligentize materials. There were four parts in the paper made the achievement.1. Synthesis and Characterization of P (AA/AM) hydrogels bonded Rare-Earth P(AA/AM) hydrogels bonded Rare-Earth Eu3+/Nd3+ were Synthesized, and the Rare-Earth was added to hydrogels by the bonding-type, and the hydrogels we prepared were of uniformity, transparency and elasticity. These were testified by the method of IR, ESEM and XRD. The testing of swollen properties showed that P (AA/AM) hydrogels bonded Rare-Earth could better response with the changing of temperature, pH and the intensity of ion.2. Synthesis and Characterization of CS/PAA hydrogels bonded Rare-EarthRare-Earth could be added to CS/PAA hydrogels by the bonded-type, the hydrogels synthesized were of alcohol-redness, uniformity, transparency and elasticity.The thermal properties were analyzed by DSC, and the results showed that the Tg was decreasing, and the temperature of application of elastomer was broadened. The testing of swollen properties showed that CS/PAA hydrogels bonded Rare-Earth could better response with the changing of temperature, pH and the intensity of ion. The strong emission peak was obtained at the 615nm by the fluorescence testing, and the intensity become stronger and stronger with the inceasing of the content of Eu3+. The fluorescence property was added on the base of traditional hydrogels, and the applied fields of hydrogels were broadened. 3. Synthesis and Characterization of Gel/P (AA/AM) hydrogels bonded Rare-EarthRare-Earth could be added to Gel/P (AA/AM) hydrogels by the bonding-type, the hydrogels synthesized were of buff, uniformity, transparency and elasticity. The testing of swollen properties showed that Gel/P (AA/AM) hydrogels bonded Rare-Earth could better response with the changing of temperature, pH and the intensity of ion.4. Stimuli-response of Gel/P (AA/AM) hydrogel bonded Rare-Earth under direct current electric fieldStimuli-response of Gel/P(AA/AM)、Sm/Gel/P(AA/AM)、Eu/Gel/P(AA/AM) hydrogels were observed under direct current electric field, these were tested by using digital speckle correlation method and the three dimension digital microscope measure system. The hydrogels behaved the well stimuli-responsing. And compared to Gel/P (AA/AM) hydrogels, Gel/P (AA/AM) hydrogels bonded Rare-Earth stimuli-responsed better.Combine the experiment and theory, the displacement of Gel/P(AA/AM) hydrogels increasing against the direction of electric field on the condition of direct current electric field, and the displacement of Sm/Gel/P(AA/AM)、Eu/Gel/P(AA/AM) hydrogels increasing obeying the direction of electric field. Under the U and V electric field, the displacement of all hydrogels have become longer and longer with the increasing of electric field intensity.The research showed that the Rare-Earth were added to hydrogels by the bonding-type and could better response with the changing of temperature, pH and the intensity of ion. A good use of the propertis of Rare-Earth including light, electricity and magnetism were made on the base of traditional hydrogels. The great meaning of the paper is that the hydrogels could make the application on the chemical switch component, sensors and artificial muscle and so on in the future.

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CLC: > Industrial Technology > Chemical Industry > Reagents and the production of pure chemicals > Colloid and hemicolloid substances > Colloidal species > Liquid - solid lines ( gel )
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