کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
229000 464856 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation of Polystyrene submicron particles using ASES process in supercritical carbon dioxide
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Preparation of Polystyrene submicron particles using ASES process in supercritical carbon dioxide
چکیده انگلیسی

The ASES (aerosol solvent extraction system) process, which is one of the SAS (supercritical anti-solvent) processes, was used to fabricate the PS (Polystyrene) into nano-size particles. Dichloromethane (DCM, CH2Cl2) and carbon dioxide were adopted as a solvent and as an anti-solvent for PS, respectively. SEM (scanning electron microscope) was used to observe the morphology and size of PS particles recrystallized by ASES process. The mean particle size and its distribution of processed particles were measured by using a laser diffraction PSA (particle size analyzer). In the ASES process, there are two key factors. One is atomization for fine droplets, and the other is mass transfer of droplets during precipitation in the vessel, which causes nucleation and growth of particles. They are affected by several elements such as temperature, pressure, concentration of solution, injection rate of solution and so on. The objective of this study was to investigate the effect of the various process parameters such as temperature, pressure, solution concentration and solution injection rate on PS particles. From this work, it was found that Polystyrene could be fabricated into submicron particles by ASES process using DCM as a solvent, and CO2 as an anti-solvent. And it was also found that the particle size was increased with increasing temperature, pressure and concentration of solution. And, by varying the solution injection rate, we found out that the solution injection rate is an important factor for making fine PS particles.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Industrial and Engineering Chemistry - Volume 14, Issue 1, January 2008, Pages 77–83
نویسندگان
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