| 标题 |
 Surfactant-Free Process for the Fabrication of Polyimide Aerogel Microparticles 无表面活性剂制备聚酰亚胺气凝胶微粒的方法
相关领域
微粒
气凝胶
硅油
聚酰亚胺
材料科学
微流控
制作
肺表面活性物质
硅酮
化学工程
聚结（物理）
油滴
纳米技术
复合材料
图层（电子）
乳状液
物理
工程类
病理
天体生物学
替代医学
医学
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| 网址 | |
| DOI | |
| 其它 | This work focuses on the fabrication of polyimide aerogel microparticles of diameter 200–1000 μm from a surfactant-free, two-phase, silicone oil/dimethylformamide (DMF) oil-in-oil (O/O) system using a simple microfluidic device. The polyimide sol prepared in DMF is turned into droplets suspended in silicone oil in the microfluidic device. The droplets are guided to a heated silicone oil bath to accelerate sol–gel transition and imidization reactions, thereby yielding spherical, discrete gel microparticles that do not undergo coalescence. The discrete gel microparticles are isolated and supercritically dried to obtain aerogel microparticles. The microparticle size distribution shows dependence on dispersed and continuous phase flowrates in the microfluidic channels. The microparticle surface morphology shows dependence on the silicone oil bath temperature. |
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