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Titanium Dioxide (TiO2) ´Â È­ÇÐÀûÀ¸·Î ºÒÈ°¼ºÀÇ Æ¯¼ºÀ» °¡Áö°í ÀÖÀ¸¸ç ¹«»ö, ¹«ÃëÇÏ¸ç ¶ÇÇÑ ÀÎü¿¡ ºÎÀÛ¿ëÀÌ ¾ø¾î Á¦¾à, ½ÄÇ°, È­ÀåÇ°, µµ·á µî ´Ù¾çÇÑ ºÐ¾ß¿¡¼­ »ç¿ëµÇ°í ÀÖ´Ù.

Á¦¾àȸ»ç¿¡¼­ Á¤Á¦ (ïüð¥, tablet, ¾Ë¾à) ¸¦ Á¦Á¶ÇÒ ¶§ Titanium Dioxide ¸¦ tablet ÀÇ ÄÚÆÃÁ¦·Î ¸¹ÀÌ »ç¿ëÇϴµ¥ À̶§ Titanium Dioxide ´Â ´ë°³ 60% slurry ·Î ó¸®ÇÏ¿© »ç¿ëÇÑ´Ù.
Titanium Dioxide slurry ³»ÀÇ TiO2 ´Â agglomeration µÇ´Â Ư¼ºÀÌ Àִµ¥ À̵éÀ» Àß ºÐ»ê (de-agglomeration) ½ÃÅ°Áö ¾ÊÀ¸¸é hiding power °¡ ¶³¾îÁö°í, ÄÚÆÃÇÑ Ç¥¸éÀÇ ±¤ÅÃÀÌ ¶³¾îÁö°í, ¶ÇÇÑ »öä°¡ º¯ÇÏ´Â ´ÜÁ¡ÀÌ ³ªÅ¸³ª°Ô µÈ´Ù.
±×·¯¹Ç·Î ÄÚÆÿ¡ »ç¿ëµÇ´Â TiO2 ´Â 1§­ ÀÌÇÏ Å©±â°¡ 90% ÀÌ»ó ±¸¼ºµÉ ¼ö ÀÖµµ·Ï dispersion ½ÃÄÑ ÁÖ´Â °ÍÀÌ ¸Å¿ì Áß¿äÇÏ´Ù.

SILVERSON High Shear Mixer °¡ TiO2 Slurry ¸¦ ºÐ»ê½ÃÅ°´Â ´É·ÂÀÌ ¾î´À Á¤µµ µÇ´ÂÁö È®ÀÎÇϱâ À§ÇØ Malvern Instruments ¿Í ÇÔ²² °øµ¿À¸·Î ºÐ¼®À» ÇÏ¿´´Ù. SILVERSON Àåºñ´Â 450LS In-line High Shear Mixer ¸¦ »ç¿ëÇÏ¿´À¸¸ç (Fig.1.) ÀÔµµºÐ¼®Àº Malvern Instrument ÀÇ Mastersizer 2000 ¸ðµ¨À» »ç¿ëÇÏ¿´´Ù.

In-line High Shear Mixer ´Â rotor/stator °¡ ÇÑ ½ÖÀ¸·Î ±¸¼ºµÇ´Â single-stage inline-mixer ¿Í µÎ ½ÖÀ¸·Î ±¸¼ºµÇ´Â multi-stage ·Î ±¸ºÐÇÒ ¼ö ÀÖ´Ù.


Fig.1. SILVERSON 450LS In-line High Shear Mixer with single-stage SLDH (slotted disintegrating head)

Fig.2. SILVERSON In-line High Shear Mixer with multi-stage SLDH (slotted disintegrating head)

SILVERSON 450LS In-line High Shear Mixer ÀÇ Å×½ºÆ®¿¡ »ç¿ëµÈ stator ´Â ´ÙÀ½°ú °°´Ù.

GPDH (General Purpose Disintegrating Head)
°¡Àå ÀϹÝÀûÀÎ ¸ñÀûÀ¸·Î »ç¿ëµÇ´Â stator ·Î¼­ °­ÇÑ flow rate ¸¦ »ý¼º½ÃÄÑ material À» °ÅÄ¥°Ô ºÐ»ê½ÃÅ°´Â ±â´ÉÀ» ÇÑ´Ù. Solid ÀÇ disintegration, gel °ú thickener ÀÇ Á¦Á¶ µîÀÇ ¸ñÀûÀ¸·Î ³Î¸® »ç¿ëµÇ´Â stator ÀÓ.
SQSH (Square Hole High Shear Screen)
¿ëÇؼº ºñ¿ëÇؼº granular solid ¸¦ ¸Å¿ì ¹Ì¼¼ÇÏ°Ô particle size reduction ½ÃÅ°´Â Ư¼ºÀ» °¡Áø stator ·Î¼­ °¡Àå °­·ÂÇÑ shear rate ¸¦ °¡Áö°í ÀÖ¾î dispersion, emulsion, disintegration, solubilization, fine colloid suspension µî¿¡ È¿°úÀûÀ¸·Î »ç¿ë.
SLDH (Slotted Disintegrating Head)
µ¿¹°Á¶Á÷ ¶Ç´Â ½Ä¹°Á¶Á÷°ú °°ÀÌ fibrous Ư¼ºÀ» °¡Áø ¹°ÁúÀ» disintegration ÇÏ´Â ¸ñÀûÀ¸·Î ¸¹ÀÌ »ç¿ëµÇ´Â stator ·Î¼­ ƯÈ÷ ź¼ºÀÌ °­ÇÑ rubber ¿Í polymer °°Àº ¹°ÁúÀÇ disintegration °ú solubilization ¿¡ ¸¹ÀÌ »ç¿ëµÊ.
Multi-SLDH (Multi Slotted Disintegrating Head)
SLDH °¡ µÎ °³ ÀÖ´Â ±¸Á¶ÀÎ multi-stage stator ·Î¼­ single stator ¿¡ ºñÇØ ¹°ÁúÀÇ chamber ³» ü·ù ½Ã°£ÀÌ Áõ°¡ÇϹǷΠdisintegration °ú solubilization ÀÇ È¿À²¼ºÀÌ Å« stator.


Agglomeration µÈ TiO2 slurry ³» ÀÔµµ´Â Å©°Ô´Â 300§­ Å©±â¿¡¼­ºÎÅÍ ÀÛ°Ô´Â 0.04 ~ 2§­ »çÀÌ¿¡ ºÐÆ÷ÇÑ´Ù. Å×½ºÆ®¿¡ »ç¿ëµÈ TiO2 ÀÇ ÀÔµµ´Â Figure 3 ¿¡ ³ªÅ¸³­ ¹Ù¿Í °°À¸¸ç 6§­ ~ 40§­ »çÀÌ¿¡ ºÐÆ÷ÇÏ´Â agglomerated TiO2 ÀÔÀÚ¸¦ ¾î¶² ±¸Á¶ÀÇ High Shear Mixer °¡ ¾î´À Á¤µµ·Î È¿À²ÀûÀ¸·Î de-agglomeration ½ÃÅ°´Â Áö È®ÀÎÇÏ´Â °ÍÀÌ À̹ø Å×½ºÆ®ÀÇ ¸ñÀûÀÌ´Ù.

Figure 3. Particle size distribution of control sample (TiO2)


¸ÕÀú GPDH (General Purpose Disintegrating Head) ¸¦ ÀÌ¿ëÇÏ¿© 6ºÐ°£ TiO2 ¸¦ ó¸®ÇÑ ÀÔµµ °á°ú´Â Figure 4 ¿Í °°´Ù. GPDH stator ¸¦ ÀÌ¿ëÇÏ¿© TiO2 ¸¦ ó¸®ÇÑ graph (light blue) ´Â Control TiO2 ÀÇ graph (dark blue) ¿Í ºñ±³ÇÏ¿© Å« º¯È­´Â ¾ø´Â °ÍÀ¸·Î ³ªÅ¸³­´Ù. Áï 6§­ ~ 40§­ ÀÔµµÀÇ TiO2 °¡ ¿©ÀüÈ÷ ³ªÅ¸³ª°í ÀÖÀ½À» ¾Ë ¼ö ÀÖ´Ù.

Figure 4. Particle size distribution of sample (TiO2) after dispersion with GPDH for 6 minutes.
Dark Blue : Control TiO2       Light Blue : GPDH


Figure 5 ´Â SQSH (Square Hole High Shear Screen) stator ¸¦ ÀÌ¿ëÇÏ¿© 3ºÐ°£ TiO2 ¸¦ ó¸®ÇÑ °á°ú·Î¼­ 6§­ ~ 40§­ ÀÔµµ¸¦ °¡Áø TiO2 °¡ »ç¶óÁø °ÍÀ» ¾Ë ¼ö ÀÖÀ¸¸ç ´õ ªÀº ½Ã°£¿¡ ´ëºÎºÐÀÇ TiO2 ÀÔÀÚ°¡ 1um ÀÌÇÏ Å©±â·Î Disintegration µÇ¾ú´Ù´Â °ÍÀ» ¾Ë ¼ö ÀÖ´Ù.

Figure 5. Particle size distribution of sample (TiO2) after dispersion with SQSH for 3 minutes.
Dark Blue : Control TiO2       Light Blue : GPDH for 6 minutes       Red : SQSH for 3 minutes


Figure 6 Àº Multi-SLDH (Multi-stage Slotted Disintegrating Head) ¸¦ ÀÌ¿ëÇÏ¿© 3ºÐ°£ TiO2 ¸¦ ó¸®ÇÑ °á°ú·Î¼­ (Light Blue) °°Àº ½Ã°£ µ¿¾È single-SQSH ·Î ó¸®ÇÑ °á°ú¿Í (Dark Blue) Å« Â÷ÀÌ´Â ¾øÀ¸³ª 1§­ º¸´Ù ÀÛÀº ÀÔÀÚµéÀÌ ´õ ¸¹ÀÌ »ý°å´Ù´Â °ÍÀ» ¾Ë ¼ö ÀÖ´Ù.

Figure 6. Particle size distribution of sample (TiO2) after dispersion with Multi-SLDH for 3 minutes
Dark Blue : Single-SQSH for 3 minutes       Light Blue : Multi-SLDH for 3 minutes


ÀÌ»óÀÇ Å×½ºÆ® °á°ú·Î¼­ ¿ì¸®´Â Multi-stage SLDH ¸¦ ÀåÂøÇÑ SILVERSON In-line High Shear Mixer °¡ TiO2 ¸¦ ºÐ»ê (dispersion & de-agglomeration) ½ÃÅ°´Â µ¥ °¡Àå ÃÖ¼±ÀÇ configuration À̶ó´Â °ÍÀ» ¾Ë ¼ö ÀÖ´Ù. ÀϹÝÀûÀ¸·Î rotor/stator ¸¦ ÀÌ¿ëÇÏ´Â Homo Mixer (or Homogenizer) ´Â ÀÔÀÚ¸¦ ³ª³ëÅ©±â±îÁö ºÐ»ê½ÃÅ°´Â °ÍÀÌ ºÒ°¡´ÉÇÑ °ÍÀ¸·Î ¾Ë·ÁÁ® ÀÖ´Ù. ±×·¯³ª SILVERSON High Shear Mixer ¸¦ ÀÌ¿ëÇϸé TiO2 ¸¦ 1§­ Å©±â±îÁö ÃæºÐÈ÷ ºÐ»ê½Ãų ¼ö ÀÖ´Ù´Â °ÍÀ» ÀÌ Å×½ºÆ®¸¦ ÅëÇØ È®ÀÎÇÒ ¼ö ÀÖ¾ú´Ù.











 
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