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¿µÁøÄÚÆÛ·¹ÀÌ¼Ç Á¾ÇÕÄ«´Ù·Î±×
| Application ¸®½ºÆ® |      


Introduction    
STEP Technology ¿¡ ±â¹ÝÀ» µÐ Multisample analytical centrifugation Àº ´Ù¾çÇÑ CNT (Carbon Nano tube) ºÐ»ê¹°
(dispersion) ÀÇ ÀÔµµºÐ¼® (particle size analysis) ¿¡ ¸Å¿ì À¯¿ëÇÏ°Ô »ç¿ëµÈ´Ù.
Measurement
ionic liquid (1-butyl-3-methylimidazoliumtetrafluoroborate) ¿¡¼­ ºÐ»êµÈ Multiwalled Carbon Nanotube (MWNT) A ¸¦ 0.005% m/m ·Î Èñ¼®ÇÑ ÈÄ Tube ¿¡ ³Ö°í LUMiSizer ÀÇ ¿Âµµ¸¦ 7¡É ·Î À¯ÁöÇϸ鼭 ȸÀü·ÂÀ» 36 - 2300 xg ·Î ´Ü°èº°·Î Áõ°¡½ÃÅ°¸é¼­ Transmission Profiles ¸¦ ´ÙÀ½°ú °°ÀÌ ±¸ÇÏ¿´´Ù.



MWNT A ÀÇ Transmission Profile Àº ÀüÇüÀûÀÎ polydisperse sedimentation À» º¸¿©ÁÖ°í ÀÖ´Ù.

STEP Technology ¸¦ ÀÌ¿ëÇÏ´Â particle size distribution ÀÇ ÃøÁ¤Àº Tube ÀÇ ÀÏÁ¤ À§Ä¡¿¡¼­ ÃøÁ¤ÇÏ´Â Costant Position ÃøÁ¤¹ý°ú ÀÏÁ¤½Ã°£ÀÌ Áö³­ ÈÄ¿¡ ÃøÁ¤ÇÏ´Â Costant Time ÃøÁ¤¹ýÀÌ ÀÖÀ¸³ª ¿©±â¼­´Â Constant Position ¹æ¹ýÀ» ÀÌ¿ëÇÏ¿© ÃøÁ¤ÇÏ¿´´Ù.
Results
ISO 13318 ±ÔÁ¤¿¡ µû¶ó Tube ÀÇ 123 mm ¿Í 125 mm À§Ä¡¿¡¼­ ÃøÁ¤ÇÑ particle size distribution Àº ´ÙÀ½°ú °°´Ù.


Cumulative intensity weighted particle size distribution of different MWNT products, a and b - repeat determination


Intensity weighted density distribution for MWNT A
Summary
¸ðµç sample µéÀº ¸Å¿ì ³ÐÀº ¹üÀ§ÀÇ ÀÔÀÚºÐÆ÷µµ¸¦ º¸ÀÌ°í Àִµ¥ ÀÌ´Â MWNT A ÀÇ Transmission Profile ¿¡¼­ ¿¹»óÇÑ ³»¿ë°ú ÀÏÄ¡ÇÏ°í ÀÖ´Ù. MWNT A ´Â 300 - 3,000 nm ÀÇ ÀÔÀÚºÐÆ÷µµ¸¦ º¸ÀÌ´Â ¹Ý¸é MWNT B ´Â 500 - 10,000 nm ÀÇ ´õ Å« ÀÔÀÚºÐÆ÷µµ¸¦ º¸ÀÌ°í ÀÖ´Ù. ´Ù¸¥ ³óµµ¿¡¼­ ¹Ýº¹ÀûÀÎ ½ÇÇèÀ» ÇÏ¿©µµ °á°ú´Â ÀÏÁ¤ÇÏ°Ô ³ªÅ¸³ª°í ÀÖ´Ù.

LUMiSizer ÀÇ SEPView software ´Â measurement protocol, different distribution types, harmonic mean values, standard deviation, fit functions µî ´Ù¾çÇÑ ºÐ¼® µ¥ÀÌÅ͸¦ Á¦°øÇÑ´Ù.



 
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