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Introduction

ÃÖ±Ù ¸î ³â°£ ½Å¿¡³ÊÁö »ê¾÷ÀÇ ±Þ¼ÓÇÑ ¹ßÀüÀº ´Ù¾çÇÑ »ê¾÷ ÀÀ¿ë ºÐ¾ß¿¡¼­ Àç»ç¿ë ¹× ÀçÃæÀüÀÌ °¡´ÉÇÑ ¹èÅ͸®·Î¼­ ¸®Æ¬ ¹èÅ͸®ÀÇ Áß¿äÇÑ ¿ªÇÒÀ» °­Á¶ÇØ ¿Ô½À´Ï´Ù. ¸®Æ¬ ¹èÅ͸®ÀÇ »ý»ê °úÁ¤¿¡¼­ Àü±Ø ½½·¯¸®´Â NMP (n-methylpyrrolidone) ¸¦ ºÐ»êÁ¦·Î »ç¿ëÇÏ¿© Á¶Á¦µË´Ï´Ù. NMP ´Â ½½·¯¸® ¹èÇÕ ´Ü°è¿¡¼­ PVDF ÀÇ ¿ë¸Å ¿ªÇÒÀ» Çϸç, ½½·¯¸®¸¦ ºÐ»ê½ÃÄÑ º¸´Ù ±ÕÀÏÇÑ ½Ã½ºÅÛÀ» ¸¸µå´Â µ¥ ±â¿©ÇÕ´Ï´Ù.

¶ÇÇÑ, NMP ´Â ÄÚÆà ´Ü°è¿¡¼­ ½½·¯¸®ÀÇ ÁÖ¿ä ¿î¹Ýü·Î ÀÛ¿ëÇÏ¿© ±âÆÇ¿¡ °í¸£°Ô ÄÚÆõǵµ·Ï µ½½À´Ï´Ù. ´õ ³ª¾Æ°¡ ÄÚÆà ¹× º£ÀÌÅ· ´Ü°è¿¡¼­ NMP ´Â ÈÖ¹ßÇÏ¿© ÄÚÆà ³»¿¡ ±â°øÀ» Çü¼ºÇϸç, ±ÕÀÏÇÏ°Ô ºÐÆ÷µÈ ´Ù°ø¼º ¹Ì¼¼ Àü±Ø ±¸Á¶¸¦ Á¦°øÇÕ´Ï´Ù.

NMP ¿¡¼­ ¹èÅ͸® Àü±Ø ¹°ÁúÀÇ ¾ÈÁ¤¼ºÀº Àü±Ø »ý»ê Ç°Áú¿¡ Á÷Á¢ÀûÀÎ ¿µÇâÀ» ¹ÌÄ¡¹Ç·Î ¸Å¿ì Áß¿äÇÕ´Ï´Ù. º» ¿¬±¸¿¡¼­´Â NMP¿¡ ºÐ»êµÈ ´Ù¾çÇÑ ½½·¯¸®ÀÇ Á¦Å¸ ÀüÀ§¸¦ ºÐ¼®ÇÏ¿´½À´Ï´Ù.


Instrument

ÀÌ ½ÇÇè¿¡¼­´Â Bettersize Instruments »çÀÇ BeNano 90 Zeta Nanoparticle Size ¹× Zeta Potential Analyser ¸¦ »ç¿ëÇÏ¿´½À´Ï´Ù. ÀÌ Àåºñ´Â 671 nm ÆÄÀåÀÇ ·¹ÀÌÀú¿Í 50 mW Ãâ·ÂÀÇ ±¤¿øÀ» »ç¿ëÇÕ´Ï´Ù. »ê¶õµÈ ±¤ ½ÅÈ£¸¦ ¼öÁýÇϱâ À§ÇØ 12µµ °¢µµ·Î ¹èÄ¡µÈ APD °ËÃâ±â¸¦ »ç¿ëÇÏ¿´½À´Ï´Ù.

³·Àº Àü±â¿µµ¿ À̵¿µµ¸¦ ³ªÅ¸³»´Â »ùÇÃÀÇ Á¦Å¸ ÀüÀ§ Á¤º¸¸¦ Á¤È®ÇÏ°Ô °¨ÁöÇϱâ À§ÇØ Phase Analysis Light Scattering (PALS, À§»ó ºÐ¼® ±¤»ê¶õ) ±â¹ýÀ» ÀÌ¿ëÇÏ¿´½À´Ï´Ù.


Experiment

³× °¡Áö ¹èÅ͸® Àü±Ø ¹°ÁúÀ» NMP ¿ë¸Å¿¡¼­ ºÐ»ê½ÃÄ×½À´Ï´Ù. organic phase NMP ÀÇ ³·Àº dielectric constant (À¯Àü »ó¼ö) ·Î ÀÎÇØ µö ¼¿(dip cell)À» »ç¿ëÇÏ¿´À¸¸ç °¢ »ùÇÃÀº Æò±Õ°ª°ú Ç¥ÁØ ÆíÂ÷¸¦ ¾ò±â À§ÇØ ¿©¼¸ ¹ø¾¿ ÃøÁ¤µÇ¾ú½À´Ï´Ù.


Results and Discussion


Figure 1. Phase plots of multiple measurements for sample #1


Figure 2. Zeta potential distributions of multiple measurements for sample #1


Figure 3. Phase plots of multiple measurements for sample #2


Figure 4. Zeta potential distributions of multiple measurements for sample #2


Figure 5. Phase plots of multiple measurements for sample #3


Figure 6. Zeta potential distributions of multiple measurements for sample #3


Figure 7. Phase plots of multiple measurements for sample #4


Figure 8. Zeta potential distributions of multiple measurements for sample #4


Table 1. Average Zeta potential distributions & Standard Deviation of 4 smaples

±×¸² 1~8¿¡ ³ªÅ¸³­ »ùÇÃÀÇ phase plots ¿Í distribution curve ±×¸®°í Table 1 ÀÇ µ¥ÀÌÅÍ¿¡ µû¸£¸é, ¸ðµç »ùÇÃÀÇ Á¦Å¸ ÀüÀ§°¡ À½¼öÀÓÀ» ¾Ë ¼ö ÀÖ½À´Ï´Ù. ÀÌ´Â Àü±Ø ¹°ÁúÀÌ NMP¿¡¼­ À½ÀüÇϸ¦ ¶í´Ù´Â °ÍÀ» ³ªÅ¸³À´Ï´Ù. ³× °¡Áö »ùÇà ¸ðµÎ Á¦Å¸ ÀüÀ§ÀÇ Å©±â´Â ¾à 50mV ¼öÁØÀ̸ç, ´õ ³ôÀº Á¦Å¸ ÀüÀ§´Â »ùÇÃÀÇ ³ôÀº ¾ÈÁ¤¼ºÀ» ÀǹÌÇÕ´Ï´Ù. ¿©·¯ ¹ø ÃøÁ¤ÇÑ °á°úÀÇ Ç¥ÁØ ÆíÂ÷´Â ÀÛ¾ÒÀ¸¸ç, ÀÌ´Â ÃøÁ¤ÀÌ ³ôÀº ÀçÇö¼ºÀ» °¡Áö°í ÀÖÀ½À» ³ªÅ¸³À´Ï´Ù.


Conclusions

ÀÌ Application Note ¿¡¼­´Â NMP ¿ë¸Å¿¡ ºÐ»êµÈ ¹èÅ͸® Àü±Ø ½½·¯¸®ÀÇ Á¦Å¸ ÀüÀ§¸¦ ÃøÁ¤ÇÏ´Â ¿¬±¸¸¦ ¼Ò°³ÇÏ¿´½À´Ï´Ù.

½ÇÇè¿¡¼­´Â BeNano 90 Zeta ¸¦ »ç¿ëÇÏ¿© ³× °¡Áö »ùÇÃÀÇ Á¦Å¸ ÀüÀ§¸¦ ÃøÁ¤Çß½À´Ï´Ù. °á°ú¿¡ µû¸£¸é, ¸ðµç »ùÇÃÀÌ À½ÀÇ Á¦Å¸ ÀüÀ§¸¦ °¡Áö¸ç, ÀÌ´Â Àü±Ø ¹°ÁúÀÌ À½ÀüÇϸ¦ ¶ì°í ÀÖÀ½À» ³ªÅ¸³À´Ï´Ù. Á¦Å¸ ÀüÀ§ÀÇ Å©±â´Â ¾à 50mV ¼öÁØÀ¸·Î, ÀÌ´Â ³ôÀº ¾ÈÁ¤¼ºÀ» ÀǹÌÇÕ´Ï´Ù.

ÀÌ ¿¬±¸¿¡¼­´Â ¹èÅ͸® Àü±Ø »ý»êÀ» ÃÖÀûÈ­Çϱâ À§Çؼ­´Â Á¦Å¸ ÀüÀ§¸¦ ÀÌÇØÇÏ´Â °ÍÀÌ Áß¿äÇϸç Á¦Å¸ÀüÀ§ ÃøÁ¤Àº ¸Å¿ì ½Å·ÚÇÒ ¼ö ÀÖ´Â ÃøÁ¤¹æ¹ýÀ̶ó´Â °ÍÀ» À̾߱âÇÏ°í ÀÖ½À´Ï´Ù.







 
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