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¿µÁøÄÚÆÛ·¹ÀÌ¼Ç Á¾ÇÕÄ«´Ù·Î±× |
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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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