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Synthesis and characterization of polyimide particles |
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| รหัสดีโอไอ | |
| Title | Synthesis and characterization of polyimide particles |
| Creator | Phetcharat Rabingkao |
| Contributor | Supakanok Thongyai |
| Publisher | Chulalongkorn University |
| Publication Year | 2552 |
| Keyword | Polyimides -- Synthesis, Particles, โพลิอิมีด -- การสังเคราะห์, อนุภาค |
| Abstract | The PI particles were synthesis by colloid method, which use good solvent and poor solvent. The polyimide precursor was prepared from reaction between dianhydride, 4,4´- oxydianiline (ODA) in NMP (good solvent), which obtain Polyamic acid (PAA) precursor solution. The PAA was injected to poor solvent of hexane and suitable amount of surfactants to mix with rigorous agitation and/or sonication to break the droplet of PAA. Then, PAA colloids were obtained and the colloid was further changed to PI particle by the in-situ chemical imidization of PAA colloids in the solution. The PI particle was separated from solution by centrifuge and dried under vacuum. In this study, various types of poor solvents, various types of surfactant and reactor and propeller blade in the reaction were investigated to verify the suitable conditions for the reactions. The best condition that produced the smallest size particulate polyimide, that have the average diameters of 1 to 10 |
| URL Website | cuir.car.chula.ac.th |
