Synthesis of Polyaniline -Clay Nanocomposites and its electrical Properties investigation
碩士 === 中原大學 === 化學研究所 === 93 === The dielectric behaviors of the polyaniline/clay nanocomposites were studied. In-situ polymerization of aniline and intercalation into organ-montmorillonite was employed. Different concentration of ammonia was used to alkalize materials in order to modify their prope...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2005
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| Online Access: | http://ndltd.ncl.edu.tw/handle/u22ra3 |
| Summary: | 碩士 === 中原大學 === 化學研究所 === 93 === The dielectric behaviors of the polyaniline/clay nanocomposites were studied. In-situ polymerization of aniline and intercalation into organ-montmorillonite was employed. Different concentration of ammonia was used to alkalize materials in order to modify their properties.
Clay is first modified to be organophilic. Aniline monomer is polymerized with ammonium peroxodisulfate. Aniline polymer is then synthesized with organophilic clay to form polyaniline/clay nanocomposites through free-radical-polymerized and oxidated-polymerized methods. Polyaniline is abrasived into powder and alkalized with 1M, 3M, 5M and 10M concentration ammonia. 0.2g powder are put it into NMP resolution to form the polyaniline/clay nanocomposites.
FT-IR XRD and TEM are used to characterize the nanocomposites. We make free film of this material and use TGA to evaluate its thermal characteristics and then use LCR meter to measure the dielectric and ohmic characteristics.
Dielectric characteristics include dielectric constant and dielectric loss. We find two things :
1. The dielectric constant of the polyaniline will increase after adding clay. This might be caused by the clay. They cause space-charge polarization.
2. The dielectric constant of the polyaniline will increase when we increase the resolution of the ammonia.
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