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KMID : 1059519980420020190
Journal of the Korean Chemical Society
1998 Volume.42 No. 2 p.190 ~ p.196
A New Sampling and SEC Method for Analysis of Underivatized Cellulose¼¿·ê·Î½º½Ã·á¸¦ ġȯü·Î ¸¸µéÁö ¾Ê°í ºÐÀÚ·® ¹× ºÐÀÚ·®ºÐÆ÷¸¦ °áÁ¤Çϱâ À§ÇÑ »õ·Î¿î ½Ã·áó¸® ¹× Å©±â¹èÁ¦Å©·Î¸¶Åä±×·¡Çǹæ¹ýÀ» È®¸³ÇÏ¿´´Ù. ¸ÕÀú ¼¿·ê·Î½º½Ã·á¸¦ N-methylmorpholine N-oxide (NMMO)¿¡ ³ìÀÎ ÈÄ dimethyl sulfoxide (DMSO)¿¡ Èñ¼®ÇÔÀ¸·Î½á 50/50(w) NMMO/DMSO¿¡ ³ìÀº ¾à 0.1%ÀÇ ½Ã·á¿ë¾×À» ¸¸µé¾ú´Ù. Ä÷³À¸·Î´Â ±Û·çÄÚ¿À½º¸¦ ÀÔÈù polydivinylbenzene °ÖÀ» ä¿î Å©±â¹èÁ¦Å©·Î¸¶Åä±×·¡ÇÇ¿ë Ä÷³À» ÀÌ¿ëÇÏ¿´À¸¸ç ¿ë¸®¾×À¸·Î´Â 0.05MÀÇ LiBr¿Í 2.5%ÀÇ ¹ÙÅÁ¿ë¾×À» Æ÷ÇÔÇÏ´Â DMSO¸¦ ÀÌ¿ëÇÏ¿´´Ù.À¯¼ÓÀº 1 mL/min·Î ÀÏÁ¤ÇÏ°Ô À¯ÁöÇÏ¿´°í, DMSOÀÇ Á¡µµ¸¦ ³·Ãß±â À§ÇØ Ä÷³À» Æ÷ÇÔÇÏ´Â Àüü ½Ã½ºÅÛÀ» 80$^{\circ}C$ ¼ö½Ä À̹ÌÁö ·Î À¯ÁöÇÏ¿´´Ù. 0.05MÀÇ LiBr¸¦ °¡ÇÔÀ¸·Î½á SEC¹ÙÅÁ¼±ÀÇ Ç¥·ù¸¦ ¹æÁöÇÒ ¼ö ÀÖ¾ú°í 2.5%ÀÇ ¹ÙÅÁ¿ë¾×À» °¡ÇÔÀ¸·Î½á ½Ã·á¿Í Ä÷³ÃæÁø¹°Áú »çÀÌÀÇ »óÈ£ÀÛ¿ëÀ» °¨¼Ò½ÃÅ°´Â È¿°ú¸¦ ¾ò¾ú´Ù. Á¼Àº ºÐÆ÷¸¦ °¡Áö´Â pullulanÇ¥Áع°Áú·ÎºÎÅÍ ¾òÀº Ä÷³º¸Á¤°î¼±À» ÀÌ¿ëÇÏ¿© µÎ °³ÀÇ I ÆÞÇÁ½Ã·á¿Í µÎ °³ÀÇ ¼¿·ê·Î½º ½ºÆÝÁö ½Ã·áÀÇ Æò±ÕºÐÀÚ·®À» °áÁ¤ÇÔÀ¸·Î½á ÆÞÇÁ·ÎºÎÅÍ ½ºÆÝÁö¸¦ ¸¸µå´Â ¼­·Î ´Ù¸¥ µÎ °¡Áö °øÁ¤¿¡¼­ÀÇ ¼¿·ê·Î½º ºÐÀÚµéÀÇ ºÐÇØÁ¤µµ¸¦ °áÁ¤, ºñ±³ÇÒ ¼ö ÀÖ¾ú´Ù.
Lee Seung-Ho

Park Hee-Young
Abstract
A new sampling and size exclusion chromatography (SEC) method for the analysis of underivatized cellulose are established. In this method, cellulose materials are first dissolved in N-methylmorpholine N-oxide (NMMO) and diluted by adding dimethyl sulfoxide (DMSO) to make the sample solutions of about 0.1% in 50/50 NMMO/DMSO (w/w). Sample solutions are analyzed using a glucose-treated divinylbenzene (DVB) SEC column and DMSO containing 0.05M LiBr and 2.5 blank as the eluant. The flow rate was constant at 1 mL/min and the whole SEC system including the column was heated at 80¡É to reduce the viscosity of DMSO. Addition of 0.05 M LiBr eliminated SEC baseline drifting, and addition of 2.5 blank seems to reduce the interaction between the sample and the column packing. SEC molecular weights were determined using a calibration curve constructed from a series of narrow pullulan standards, and they were used to measure the degree of degradation during two different pulp-to-sponge processings.
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