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¿µÁøÄÚÆÛ·¹ÀÌ¼Ç Á¾ÇÕÄ«´Ù·Î±×
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Introduction

³ª³ë »çÀÌÁî SiO©ü (Silicon Dioxide) ´Â ¸Å¿ì ´Ù¾çÇÑ ¸ñÀûÀ¸·Î ³Î¸® »ç¿ëµÇ°í ÀÖ½À´Ï´Ù. ¹ÝµµÃ¼ Ç¥¸éÀ» ¿¬¸¶ÇÒ ¶§ ¿¬¸¶Àç·Î »ç¿ëµÉ ¼ö ÀÖÀ¸¸ç, ¿ì¼öÇÑ Ç¥¸é ¼º´É ´öºÐ¿¡ ÄÚÆà Àç·á·Îµµ »ç¿ëµË´Ï´Ù. °í¹«, Çöó½ºÆ½, ö°­, ÅÂ¾ç ¿¡³ÊÁö ºÐ¾ß¿¡ ³Î¸® Àû¿ëµÇ¾î Reinforcement (º¸°­), Shear Resistance (Àü´Ü ÀúÇ×¼º), Thixotropy µîÀ» Çâ»ó½Ãŵ´Ï´Ù.

1968³â Stober ´Â ´Ù¾çÇÑ ºñÀ²ÀÇ ¾Ï¸ð´Ï¾Æ¿Í ¿¡Åº¿Ã ¿ë¾×¿¡ ºÐ»êµÈ Tetramethylsilane È¥ÇÕ¹°À» ±³¹ÝÇÏ¿©, ÀÔÀÚ Å©±â°¡ ´ÜºÐ»ê¿¡ °¡±î¿î Nano-Silica Spheres ¸¦ ½Ç¿Â¿¡¼­ ¾òÀ» ¼ö ÀÖÀ½À» ¹ß°ßÇß½À´Ï´Ù. ³ª³ë ½Ç¸®Ä«´Â »ç¿ë ½Ã ¾×ü¿¡ ºÐ»êµÇ´Â °æ¿ì°¡ ¸¹½À´Ï´Ù. µû¶ó¼­ ½Ã½ºÅÛÀÇ ¾ÈÁ¤¼ºÀ» ÀÌÇØÇÏ°í Á¦Ç°ÀÇ Ç°ÁúÀ» Çâ»ó½ÃÅ°±â À§Çؼ­´Â Á¦Å¸ ÀüÀ§ ÃøÁ¤ÀÌ ÇʼöÀûÀÔ´Ï´Ù.

ÀÌ Application Note ¿¡¼­´Â Bettersize »çÀÇ BeNano 180 Zeta Nanoparticle Size and Zeta Potential Analyzer ¸¦ »ç¿ëÇÏ¿© Aqueous Environment ¿¡ ºÐ»êµÈ ´Ù¸¥ ¹èÄ¡ÀÇ ³ª³ë ½Ç¸®Ä«ÀÇ Á¦Å¸ ÀüÀ§¸¦ ÃøÁ¤ÇÕ´Ï´Ù.


Theory and Instrumentation

BeNano 180 Zeta (Bettersize Instruments Ltd.) ´Â ÆÄÀåÀÌ 671 nm ÀÌ°í Ãâ·ÂÀÌ 50 mW ÀÎ °íü ·¹ÀÌÀú¸¦ ±¤¿øÀ¸·Î ÀåÂøÇÏ°í ÀÖ½À´Ï´Ù. »ùÇÿ¡ Àü±âÀåÀ» Àû¿ëÇÏ¿© ÇÏÀüµÈ ÀÔÀÚµéÀÌ Àü±â¿µµ¿¿¡ ÀÇÇØ À̵¿ÇÏ°Ô µË´Ï´Ù. ·¹ÀÌÀú°¡ »ùÇÃÀ» Á¶»çÇϸé, ÀÔÀÚÀÇ Àü±â¿µµ¿ ¿îµ¿À¸·Î ÀÎÇØ »ê¶õµÈ ºûÀÇ ÁÖÆļö°¡ ¿ø·¡ ÁÖÆļö¿¡¼­ º¯ÇÏ°Ô µË´Ï´Ù. À̶§ 12¡Æ °¢µµ·Î »ê¶õµÈ ºû ½ÅÈ£¸¦ ¼öÁýÇϱâ À§ÇØ APD Photo Detector °¡ »ç¿ëµË´Ï´Ù.

BeNano 180 Zeta ´Â Phase Analysis Light Scattering (PALS) ±â¼úÀ» »ç¿ëÇÏ¿© Àü±â¿µµ¿ À̵¿µµ°¡ ³·Àº »ùÇÿ¡¼­µµ Á¦Å¸ ÀüÀ§¸¦ °¨ÁöÇÒ ¼ö Àִ Ư¼ºÀ» °¡Áö°í ÀÖ½À´Ï´Ù.


Experiment

³× °¡Áö Nano Silica Slurry Sample ÀÇ Á¦Å¸ ÀüÀ§´Â ¿ø·¡ ³óµµ ((solid content of 10%) ¿Í ¹°¿¡ 30¹è Èñ¼®µÈ »óÅ¿¡¼­ ÃøÁ¤µÇ¾ú½À´Ï´Ù. °¢ »ùÇÃÀº °á°úÀÇ ÀçÇö¼ºÀ» º¸ÀåÇÏ°í Ç¥ÁØ ÆíÂ÷¸¦ ¾ò±â À§ÇØ ÃÖ¼Ò ¼¼ ¹ø¾¿ ÃøÁ¤µÇ¾ú½À´Ï´Ù.


Results and Discussion

PALS ±â¼úÀ» ÅëÇØ ³× °¡Áö Nano Silica Suspension ÀÇ Á¦Å¸ ÀüÀ§°ªÀ» ±¸ÇÏ¿´½À´Ï´Ù. ±×¸² 1-4´Â °¢°¢ÀÇ ÃøÁ¤¿¡ ´ëÇÑ À§»óµµ¸¦ º¸¿©ÁÖ¸ç, ±× ±â¿ï±â´Â Àü±â¿µµ¿¿¡ ÀÇÇØ ¹ß»ýÇÑ ÁÖÆļö º¯È­¸¦ ³ªÅ¸³À´Ï´Ù. ±×¸²¿¡¼­ º¼ ¼ö ÀÖµíÀÌ, °¢ À§»óµµ´Â ¸íÈ®ÇÑ ±â¿ï±â¸¦ °¡Áö¸ç ¾çÈ£ÇÑ ½ÅÈ£ ´ë ÀâÀ½ºñ¸¦ º¸¿©ÁÝ´Ï´Ù.


Figure 1. The phase plot and zeta potential trend of sample 1# with original concentration (left) and diluted by 30 times (right)


Figure 2. The phase plot and zeta potential trend of sample 2# with original concentration (left) and diluted by 30 times (right)


Figure 3.The phase plot and zeta potential trend of sample 3# with original concentration (left) and diluted by 30 times (right)


Figure 4. The phase plot and zeta potential trend of sample 4# with original concentration (left) and diluted by 30 times (right)

À§ °á°ú¿¡¼­ º¸´Â ¹Ù¿Í °°ÀÌ, Á¦Å¸ ÀüÀ§´Â À½¼ö¸¦ ³ªÅ¸³»¸ç, ÀÔÀÚ Ç¥¸é¿¡ À½ÀüÇÏ°¡ ÀÖÀ½À» º¸¿©ÁÝ´Ï´Ù. ÀÏ°üµÈ Á¦Å¸ ÀüÀ§ °æÇâ°ú ºñ±³Àû ÀÛÀº Ç¥ÁØ ÆíÂ÷´Â ¿ì¼öÇÑ °á°ú ÀçÇö¼ºÀ» º¸¿©ÁÝ´Ï´Ù.


Table 1. The zeta potential results of silica samples

¸ðµç »ùÇÃÀÇ Á¦Å¸ ÀüÀ§°¡ ³ôÀº °ª (30 mV ÀÌ»ó) À¸·Î ³ªÅ¸³ª¹Ç·Î »ùÇõéÀº ÀÀÁýÀÌ µÉ °¡´É¼ºÀÌ ³·½À´Ï´Ù. °¢ °á°ú¸¦ ºñ±³ÇØ º¸¸é, »ùÇà 1# °ú »ùÇà 2# °¡ °¡Àå ³ôÀº Á¦Å¸ ÀüÀ§¸¦ °¡Áö°í ÀÖÀ¸¸ç, ±× ´ÙÀ½À¸·Î »ùÇà 3#, °¡Àå ³·Àº Á¦Å¸ ÀüÀ§¸¦ °¡Áø »ùÇÃÀº 4# ÀÓÀ» ¾Ë ¼ö ÀÖ½À´Ï´Ù. µû¶ó¼­ »ùÇà 1# °ú 2# °¡ ³× °¡Áö ½Ç¸®Ä« ÇöŹ¾× Áß °¡Àå ¾ÈÁ¤ÀûÀÏ °¡´É¼ºÀÌ Å®´Ï´Ù. ¶ÇÇÑ, 30 ¹è Èñ¼® ÈÄ »ùÇà 2# ¿Í 3# ÀÇ Á¦Å¸ ÀüÀ§ Àý´ë°ªÀÌ ÈξÀ Ä¿Á³À¸¸ç, ÀÌ´Â ¿ø¾×º¸´Ù ´õ ³ªÀº ¾ÈÁ¤¼ºÀ» ³ªÅ¸³À´Ï´Ù.


Conclusion

°í³óµµÀÇ ³× °¡Áö ³ª³ë ½Ç¸®Ä« ÇöŹ¾×°ú ¼ø¼öÇÑ ¹°·Î 30¹è Èñ¼®ÇÑ ÇöŹ¾×ÀÇ Á¦Å¸ ÀüÀ§ ÃøÁ¤Àº BeNano 180 Zeta ¸¦ »ç¿ëÇÏ¿© ¼º°øÀûÀ¸·Î ¼öÇàµÇ¾ú½À´Ï´Ù. ¿ì¼öÇÑ °á°ú ÀçÇö¼ºÀ» º¸¿©ÁÖ¾úÀ¸¸ç, °¡Àå Áß¿äÇÑ °ÍÀº ¼­·Î ´Ù¸¥ ¹èÄ¡³ª Á¦Çü °£ÀÇ ºÐ»ê¾ÈÁ¤¼º ºñ±³¸¦ °¡´ÉÇÏ°Ô ÇÏ¿© Á¦Ç° Ç°ÁúÀ» Á¤·®ÀûÀ¸·Î Á¦¾îÇÏ°í ¸ð´ÏÅ͸µÇÒ ¼ö ÀÖ°Ô ÇØÁشٴ Á¡ÀÔ´Ï´Ù.







 
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