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A comparative study of physical properties of $TiO_2$ thin films according to a coating method on orthodontic wires and brackets
°íÀºÈñ, Á¶ÁøÇü,
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°íÀºÈñ ( Koh Eun-Hee ) - Àü³²´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°ú±³Á¤Çб³½Ç
Á¶ÁøÇü ( Cho Jin-Hyoung ) - Àü³²´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°ú±³Á¤Çб³½Ç
KMID : 0361920060360060451
Abstract
º» ¿¬±¸´Â Ç× ±³Á¤ÀåÄ¡ÀÇ °³¹ß¿¡ µµ¿òÀÌ µÇ°íÀÚ ÀÌ»êÈƼź ±¤Ã˸ÅÀÇ ÄÚÆà ½Ã ¾ÈÁ¤ÀûÀÌ°í È¿°úÀûÀÎ ¹æ¹ýÀ» ã±â À§ÇÏ¿© ½ÃÇàµÇ¾ú´Ù. ½ÃÆǵǰí ÀÖ´Â ±³Á¤¿ë ¿ÍÀ̾î¿Í ºê¶óÄÏ¿¡ sol-gel¹ý, CVD (Chemical Vapor Deposition)¹ý ¹× PE-CVD (Plasma Enhanced-CVD)¹ýÀ¸·Î ÀÌ»êÈƼźÀ» °¢°¢ ÄÚÆÃÇÑ ´ÙÀ½ °¢ ¹æ¹ýÀ¸·Î ÄÚÆÃµÈ ÀÌ»êÈƼź ¹Ú¸·ÀÇ Æ¯¼ºÀ» ¾Ë¾Æº¸°íÀÚ ÁÖ»çÀüÀÚÇö¹Ì°æÀ» ÀÌ¿ëÇÏ¿© °¢ ½ÃÆíÀÇ ÄÚÆùڸ· Ç¥¸éÀÇ °ÅÄ¥±â¸¦ °üÂûÇÏ¿´°í adhesive tape pull test¸¦ ÀÌ¿ëÇÏ¿© ÄÚÆùڸ·ÀÇ Á¢Âø°µµ¸¦ ÃøÁ¤ÇÏ¿´´Ù. ¸ÞÆ¿·»ºí·ç¿ë¾×¿¡ °¢ ½ÃÆíÀ» ħÁö½ÃŲ ÈÄ ½Ã°£°æ°ú¿¡ µû¸¥ ¸ÞÆ¿·»ºí·ç¿ë¾×ÀÇ ³óµµº¯È ÃøÁ¤À» ÅëÇØ ÄÚÆùڸ·ÀÇ ºÐÇØ´ÉÀ» Æò°¡ÇÏ¿´À¸¸ç ºÒȳªÆ®·ý ¿ë¾×¿¡ °¢ ½ÃÆíÀ» ħÁö½ÃŲ ÈÄ ÁÖ»çÀüÀÚÇö¹Ì°æÀ» ÀÌ¿ëÇÏ¿© Ç¥¸éºÎ½Ä Á¤µµ¸¦ °üÂûÇÔÀ¸·Î½á ºÒ¼ÒÈÇÕ¹°¿¡ ´ëÇÑ ³»ºÎ½Ä¼ºÀ» Æò°¡ÇÏ¿© ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù. ÄÚÆùڸ·ÀÇ Ç¥¸éÀº CVD¹ý ¹× PE-CVD¹ýÀÌ sol-gel¹ýÀ̳ª ÄÚÆõÇÁö ¾ÊÀº ½ÃÆí¿¡ ºñÇØ ´õ ¸Å²ô·¯¿ü´Ù. ÄÚÆùڸ·ÀÇ Á¢Âø°µµ´Â PE-CVD¹ýÀÌ °¡Àå ³ô¾Ò°í, CVD¹ý, sol-gel¹ýÀÇ ¼øÀ¸·Î ³·°Ô ³ªÅ¸³µ´Ù. ÄÚÆùڸ·ÀÇ ¸ÞÆ¿·»ºí·ç ºÐÇØ´ÉÀº PE-CVD¹ýÀÌ °¡Àå ³ô¾Ò°í, CVD¹ý, sol-gel¹ýÀÇ ¼øÀ¸·Î ³·°Ô ³ªÅ¸³µ´Ù. ÄÚÆùڸ·ÀÇ ºÒ¼ÒÈÇÕ¹°¿¡ ´ëÇÑ ³»ºÎ½Ä¼ºÀº CVD¹ý ¹× PE-CVD¹ýÀÌ sol-gel¹ý¿¡ ºñÇØ ³ô°Ô ³ªÅ¸³µ´Ù. ÀÌ»óÀÇ °á°ú´Â ±³Á¤¿ë ¿ÍÀÌ¾î ¹× ºê¶óÄÏÀÇ ÀÌ»êÈƼź ±¤Ã˸ŠÄÚÆà ½Ã CVD¹ý ¹× PE-CVD¹ýÀÌ sol-gel¹ýº¸´Ù ÀûÀýÇÑ ¹æ¹ýÀÓÀ» ½Ã»çÇÏ¿´´Ù
The purpose of this study was to search for an appropriate method of coating $TiO_2$ on orthodontic appliances. $TiO_2$ thin films were deposited on orthodontic wires and brackets using sol-gel, CVD (Chemical Vapor Deposition) and PE-CVD (Plasma Enhanced-CVD) methods. The roughness of $TiO_2$-coated surfaces was investigated via scanning electron microscope (SEM) and adhesive strength of $TiO_2$ thin films was measured by adhesive tape pull test. Methylene blue degradation test was carried out to evaluate the photocatalytic activity of $TiO_2$ and the corrosion resistance of $TiO_2$ thin films against fluoride solution was also analyzed by observing the surfaces of $TiO_2$-coated wires and brackets via SEM after immersion in sodium fluoride solution. Through the comparison of properties and photocatalytic activity of $TiO_2$ thin films according to the coating methods, the following results were obtained. Smoother surfaces of $TiO_2$ thin films were generated by CVD or PE-CVD methods than through the sol-gel method or the control. Adhesive strength of the $TiO_2$ thin films was highest in PE-CVD and gradually became lower in the order of CVD, then the sol-gel method. Photocatalytic activity of $TiO_2$ thin films on methylene blue was the highest in PE-CVD and gradually became lower in the order of CVD, then the sol-gel method. Corrosion resistance of $TiO_2$ thin films against fluoride solution was stronger in CVD and PE-CVD methods than in the sol-gel method. The results of this study suggest that the CVD or PE-CVD methods is more appropriate than the sol-gel method for $TiO_2$ coating on orthodontic wires and brackets.
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ÀÌ»êÈƼź;ÄÚÆùæ¹ý;CVD¹ý
$TiO_2$;Coating method;CVD;PE-CVD
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