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2000³â ù °³ÃÖµÈ ÀÌÈÄ 3³â¸¶´Ù ¾Æ½Ã¾Æ °¢ ±¹°¡¿¡¼­ ¼øȸ °³Ãֵǰí ÀÖ´Â APT (Asian Particle Technology) Symposium Àº ¾Æ½Ã¾Æ °¢ ±¹°¡ÀÇ particle °ü·Ã ¿¬±¸ÀεéÀÌ ¸ð¿© particle preparation and design, indusrial and engineering applications, analysis of particle behavoir and performances, modeling and simulations, particle-fluid systems, powder metallurgy, mineral processing, particles for nanotechnology, biological and pharmaceutical particles, cements, paints and pigments, fertilizers µîÀÇ ºÐ¾ß¿¡ ´ëÇÑ »õ·Î¿î ±â¼ú°ú ¿¬±¸°á°ú¸¦ ¹ßÇ¥ÇÏ´Â ½ÉÆ÷Áö¿òÀÔ´Ï´Ù.
2000 : Thailand
2003 : Malaysia
2006 : China
2009 : India
2012 : Singapore
2015 : Seoul
ÀÏ ½Ã : 15 - 18 Sep. , 2015 Àå ¼Ò : COEX, Seoul Site : www.apt2015.org
ÁÖ ÃÖ : Çѱ¹È­ÇаøÇÐȸ ¹Ì¸³ÀÚ°øÇÐ ºÎ¹®À§¿øȸ ÈÄ ¿ø : ¼­¿ï½Ã APT 2015 ¾È³»¹® ´Ù¿î·Îµå


 
Subject 1 : New insight into concentrated micro- and nanodispersions by X-ray concentration profiling
Session : [OP05] Other topics related with particle technology-1
Time : 11:50 - 12:05 (Wed) Sep. 16, 2015
Location : Conference Room (South) 307B
Abstract : Characterization of dispersions, e.g. regarding separation phenomena (stability) and homogeneity is problematic for concentrated nontransparent dispersions but also transparent nanodispersions. This applies even more in case of complex mixtures, when the dispersed phase is a mixture of two or more materials. In particular it is difficult to define a separation level and to quantify differences in solids concentration inside the sample. To overcome these difficulties a new analytical instrument - the LUMiReader X-Ray - has been developed. The working principle is based on measurement of space and time resolved X-ray transmission profiles over the entire sample height. In contrast to optical measurements X-ray transmits very highly concentrated dispersions, powders and composite materials. Recorded X-ray intensities depend only on mass concentration of particles and do not depend on particle size and shape. The new approach can be easily applied to detect inhomogeneities e.g. in mortars and creams or after dispersing particles in liquids or polymers. On the other hand kinetics of separation phenomena at earth gravity as well as in combination with analytical centrifugation can be analyzed and local sediment packing studied (see figure left . concentration profiles inside flocculated lime sediments as function of relative centrifugal force applied). Segregation results for dispersions made of mixtures of different materials (different X-ray absorption properties), like dispersions in paper industry and colour cosmetics, will be also presented (see figure right - dark blue nail varnish sample after 2 hours centrifugation at RCF 2300. photo and extinction profile . pigment segregation detectable by X-ray).   ÃÊ·Ï ´Ù¿î·Îµå
 
Subject 2 : Characterization of dispersibility and dispersion quality
Session : [OP15] Process analytical technologies, particle characterization and monitoring-1
Time : 17:15 - 17:30 (Wed) Sep. 16, 2015
Location : Conference Room (South) 307B
Abstract : To make an economic use of raw materials in suspension based formulations one has to obtain a high degree of dispersion. This is related also to practical aspects like achieving high hiding power at lower pigment concentration and of outstanding material properties in composites. Dispersibility and the resulting quality of dispersion are determined by several factors including structure/quality of the raw materials and dispersion media, dispersion process and additives, which have to be characterized and quantified. Regarding selection of dispersion media and additives determination of Hansen solubility parameters (HSP¡¯s) can be used as a guide to reduce trial and error. A multisample analytical centrifugation technique with photometric detection (LUMiSizer, LUM, Germany) is used in this study for instrumented evaluation of dispersibility and dispersion quality as well as for determination of HSP for pigments. Multisample analytical centrifugation approach enables the direct determination of dispersion stability at original concentration. Even more information about dispersion structure (e.g. flocculation state) is obtained. A dispersibility index is proposed for characterization of the materials to be dispersed. A broad range of examples is given ranging from pigment dispersions (see example below for different batches of a pigment paste), over pharmaceutical applications to high tech material like graphene and carbon nanotubes. Determination of the HSP for pigments is exemplified using the multisample capability of the instrument.   ÃÊ·Ï ´Ù¿î·Îµå
 


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- 1994³â, Suspension°ú Emulsion ºÐ¾ßÀÇ ¹ßÀüÀ» À§ÇØ Çõ½ÅÀûÀÎ Àåºñ¸¦ °³¹ßÇÏ°Ú´Ù´Â ¸ñÇ¥·Î LUM GmbH ¼³¸³
- Dispersion Analysis, Colloid Chemistry, Blood Rheology and Fluid Dynamics ºÐ¾ß Àú³Î¿¡ 250Æí ÀÌ»óÀÇ ³í¹®, article ¹ßÇ¥
- ISO ȸ¿øÀ̸ç, Particle Characterization ÀÇ working group 2 (sedimentation methods) ¿Í
working group 16 (stability)ÀÇ ÀÇÀå
- ±¹Á¦ÇмúÁö Biorheology (IOS ÃâÆÇ)ÀÇ ÆíÁýÀ§¿øȸ ȸ¿ø
- Particle Measurement Technology, Fluid Separation and Rheology ÀÇ German national VCI committees ȸ¿ø
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- úÞ µ¶ÀÏ º£¸¦¸° Humboldt University ÀÇÇй°¸® ¹× »ý¹°¹°¸®ÇÐ ÀüÀÓ±³¼ö
- îñ µ¶ÀÏ º£¸¦¸° Humboldt University ÀÇ°ú´ëÇÐ ÀÇÇй°¸® ¹× »ý¹°¹°¸®ÇаúÀå
- µ¶ÀÏ º£¸¦¸° Humboldt University »ý¹°¹°¸®ÇÐ ¹Ú»ç Ãëµæ
- ·¯½Ã¾Æ ¸ð½ºÅ©¹Ù Lomonossow University Á¹¾÷
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- Biophysical Society of Shanghai (Áß±¹) ¸í¿¹È¸¿ø»ó
- Int. Society of Filtration (¿µ±¹) ±Ý¸Þ´Þ
- 2012 of Berlin_Brandenburg (µ¶ÀÏ) Çõ½Å»ó



 
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