کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9635781 | 1427487 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Operating regimes and mechanism of particle formation during the precipitation of polymers using the PCA process
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Operating regimes and mechanism of particle formation during the precipitation of polymers using the PCA process Operating regimes and mechanism of particle formation during the precipitation of polymers using the PCA process](/preview/png/9635781.png)
چکیده انگلیسی
This article provides experimental evidence for the hypothesis that when processing polymer solutions there are two different mechanisms of droplet formation governing the final size of the precipitated polymer particles: hydraulic atomisation and liquid-liquid phase split. The system l-polylactic acid (l-PLA)-dichloromethane (DCM)-CO2 was used to demonstrate that particle size can be manipulated by modifying the operating conditions. Working at conditions below the mixture critical pressure of the solvent-CO2 mixture it was possible to produce polymer particles in the range of 5-50 μm. At conditions where the two fluids are completely miscible, l-PLA particles ranging from 0.1 to 2 μm and microfibers were obtained. The possibility of co-precipitation of cholesterol and l-PLA was also addressed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Supercritical Fluids - Volume 35, Issue 2, September 2005, Pages 147-156
Journal: The Journal of Supercritical Fluids - Volume 35, Issue 2, September 2005, Pages 147-156
نویسندگان
Y. Pérez de Diego, H.C. Pellikaan, F.E. Wubbolts, G.J. Witkamp, P.J. Jansens,