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Convenient preparation of monolithic aerogel-like organosilica material through solid decomposition
| Content Provider | Scilit |
|---|---|
| Author | Li, Baiyu Li, Xiang Zhang, Chunxiao He, Naipu Liu, Zaiman |
| Copyright Year | 2018 |
| Description | Journal: Materials Research Express Unlike aerogel preparation processes usually adopted, where a wet gel is first prepared and then solvent eliminated by supercritical extraction or ambient pressure evaporation, which often involves repeated time-consuming solvent exchange steps, the present process gives aerogel-like organosilica material through simple solid sublimation. In this process, a readily decomposable solid powder, ammonium carbonate (AC), is wetted with a resinous polymer solution of polymethylsilsesquioxane (PMSQ) and moulded into a desired shape. After PMSQ solution transforms to gel under catalysis by dibutyltin dilaurate, the sample is elevated to a higher temperature for the solvent to evaporate and AC to decompose. The obtained porous product has porosity up to 98.2 % and bulk density of 0.035 g/cm3 and nitrogen adsorption-desorption measurement gives BET surface area of 103 m2/g, when 20 wt.% PMSQ is used. FTIR spectra confirm the crosslinking of PMSQ after heating. Scanning electron microscopy (SEM) image shows that the obtained product is highly porous and aerogel-like. The porous product shows excellent oil collecting capability of 11g/g porous solid in an oil-collecting test made by vacuum oil on water. This method is straightforward and convenient to use for highly porous aerogel-like material preparation. |
| Related Links | http://iopscience.iop.org/article/10.1088/2053-1591/aaea3e/pdf |
| ISSN | 20531591 |
| e-ISSN | 20531591 |
| DOI | 10.1088/2053-1591/aaea3e |
| Journal | Materials Research Express |
| Issue Number | 2 |
| Volume Number | 6 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2018-10-22 |
| Access Restriction | Open |
| Subject Keyword | Journal: Materials Research Express Chemical Engineering Aerogel Like |
| Content Type | Text |
| Resource Type | Article |
| Subject | Surfaces, Coatings and Films Metals and Alloys Biomaterials Electronic, Optical and Magnetic Materials Polymers and Plastics |
