Preparation and Characterization of Electrospun Polyimide Microfibrous Mats with High Whiteness and High Thermal Stability from Organo-soluble Polyimides Containing Rigid-rod Moieties
| العنوان: | Preparation and Characterization of Electrospun Polyimide Microfibrous Mats with High Whiteness and High Thermal Stability from Organo-soluble Polyimides Containing Rigid-rod Moieties |
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| المؤلفون: | Chen-yu Guo, Xiu-min Zhang, Xiao Wu, Yan Zhang, Jin-gang Liu, Meng-ge Huangfu, Lu-meng Yin |
| المصدر: | Fibers and Polymers. 19:1706-1714 |
| بيانات النشر: | Springer Science and Business Media LLC, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | Materials science, Polymers and Plastics, General Chemical Engineering, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Electrospinning, Thermal expansion, 0104 chemical sciences, Viscosity, Chemical engineering, Thermal stability, Rigid rod, Solubility, 0210 nano-technology, Glass transition, Polyimide |
| الوصف: | A series of flexible and tough polyimide (PI) microfibrous mats (PI-1~PI-4) have been prepared via the one-step electrospinning procedure with the organo-soluble PI resins as the starting materials. For this purpose, four PI resins were first synthesized by the chemical imidization reaction from 2,2′-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6FDA) and four aromatic diamines containing rigid-rod moieties in their molecular skeletons, respectively. The PI resins derived from 6FDA and aromatic diamines, including PI-1 from 2-(4-aminophenyl)-5-aminobenzimidazole (APBI), PI-2 from 2-(4-aminophenyl)-5-aminobenzoxazole (APBO), PI-3 from 4,4′-diaminobenzanilide (DABA), and PI-4 from 2-chloro-4,4-diaminobenzanilide (Cl-DABA) exhibited good solubility in polar aprotic solvents, such as N-methyl-2-pyrrolidone (NMP) and N,N-dimethylacetamide (DMAc). Flexible and tough microfibrous mats were successfully prepared by a one-step electrospinning procedure from the PI/DMAc solution (solid content: 15–20 wt%; absolute viscosity: 8000–10000 mPa·s). The derived PI mats exhibited good whiteness according to the CIE Lab measurements with W (whiteness) values as high as 94.31, L (lightness) values higher than 94.00, b* (yellowness) values as low as 2.98 and yellow indices (YI) as low as 4.87. In addition, the prepared PI mats exhibited excellent thermal and dimensional stability with the glass transition temperatures (Tg) higher than 345 °C and linear coefficients of thermal expansion (CTE) as low as 27.8×10-6 /K. |
| تدمد: | 1875-0052 1229-9197 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::6863e7e0e86615112508e5663b5a2c7d https://doi.org/10.1007/s12221-018-8270-4 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........6863e7e0e86615112508e5663b5a2c7d |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 18750052 12299197 |
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