Preparation and Characterization of Highly Cross-Linked Polyimide Aerogels Based on Polyimide Containing Trimethoxysilane Side Groups
文献类型：期刊论文
| 作者 | Pei, Xueliang ; Zhai, Wentao ; Zheng, Wenge |
| 刊名 | LANGMUIR
 |
| 出版日期 | 2014 |
| 卷号 | 30期号:44页码:13375 |
| 中文摘要 | In this study, highly cross-linked and completely imidized polyimide aerogels were prepared from polyimide containing trimethoxysilane side groups, which was obtained as the condensation product of polyimide containing acid chloride side groups and 3-aminopropyltrimethoxysilane. After adding water and acid catalyst, the trimethoxysilane side groups hydrolyzed and condensed one another, and a continuous increase in the complex viscosities of the polyimide solutions with time was observed. The formed polyimide gels were dried by freeze-drying from tert-butyl alcohol to obtain polyimide aerogels, which consisted of a three-dimensional network of polyimide fibers tangled together. By varying the solution concentration of the polyimide containing trimethoxysilane side groups, polyimide aerogels with different densities (ranging from 0.19 to 0.42 g/cm(3)) were obtained. The resulting polyimide aerogels had small pore diameter (ranging from 20.7 to 58.3 nm), high surface area (ranging from 310 to 344 m(2)/g), high 5% weight loss temperature in air (at about 440 degrees C), and an excellent mechanical property. In addition, the glass transition temperature (349 degrees C) of the polyimide aerogels was much higher than that (210 degrees C) of the corresponding linear polyimide. So, even after being heated at 300 degrees C for 30 min, the porous structure of the polyimide aerogels was not completely destroyed. |
| 公开日期 | 2015-09-20 |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/11685]  |
| 专题 | 宁波材料技术与工程研究所_2014专题 |
| 推荐引用方式 GB/T 7714 | Pei, Xueliang,Zhai, Wentao,Zheng, Wenge. Preparation and Characterization of Highly Cross-Linked Polyimide Aerogels Based on Polyimide Containing Trimethoxysilane Side Groups[J]. LANGMUIR,2014,30(44):13375. |
| APA | Pei, Xueliang,Zhai, Wentao,&Zheng, Wenge.(2014).Preparation and Characterization of Highly Cross-Linked Polyimide Aerogels Based on Polyimide Containing Trimethoxysilane Side Groups.LANGMUIR,30(44),13375. |
| MLA | Pei, Xueliang,et al."Preparation and Characterization of Highly Cross-Linked Polyimide Aerogels Based on Polyimide Containing Trimethoxysilane Side Groups".LANGMUIR 30.44(2014):13375. |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。