화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.37, No.3, 362-372, May, 2013
Export Citation
셀룰로오스-NMMO 수화물 용액의 압출가공 조건에 따른 셀룰로오스 분자량과 알파 셀룰로오스 함량 변화에 대한 연구
Study on the Changes of Cellulose Molecular Weight and α-Cellulose Content by the Extrusion Conditions of Cellulose-NMMO Hydrate Solution
김동복†
  • 단국대학교 광에너지소재연구센터, 고분자시스템공학과
Dong-bok Kim†
  • Center for Photofunctional Energy Materials, Dept. of Polymer Science and Engineering, Dankook University, 126 Jukjeon-dong, Sugi-ku, Yongin-si, Gyeonggi-do 448-701, Korea
E-mail:
초록
새로운 방법에 의하여 제조된 셀룰로오스-NMMO pre-dope를 이용한 셀룰로오스 섬유 및 필름 제조를 위한 압출가공 시 열분해 및 기계적 분해에 따른 셀룰로오스의 분자량 및 알파 셀룰로오스 함량 변화에 대하여 고찰하였다. 고속분쇄에 의해 제조된 pre-dope를 압출기에 통과시켜 용액으로 제조할 때 가공온도, 셀룰로오스의 농도 및 체제시간에 따라 셀룰로오스의 분자량 및 알파 셀룰로오스 함량 변화가 다양하게 나타났다. 셀룰로오스의 분자량과 알파 셀룰로오스 함량은 셀룰로오스의 농도가 낮을수록 온도가 높을수록 감소하였다. 셀룰로오스 농도 15% 및 짧은 체제시간 영역에서 알파 셀룰로오스 함량은 높은 전단으로 인해 온도가 높을수록 가장 큰 변화를 보였다. 다양한 가공조건으로부터 알파 셀룰로오스 함량변화 거동은 분자량 변화와 다른 거동을 보였으며 셀룰로오스 용액 제조를 위한 압출가공조건이 중요 요인임을 알 수 있었다.
During extruder processing to manufacture cellulose fiber and film using cellulose-NMMO pre-dope produced by a new method, it seems to occur the changes of molecular weight and α-cellulose content of cellulose upon thermal and mechanical degradation. In an extruder making cellulose solutions from the pre-dope obtained by high-speed mixer, the changes of cellulose molecular weight and α-cellulose content resulted with the variations of processing temperature, concentration of cellulose, and residence time. The molecular weight and α-cellulose content of cellulose decreased with decreasing cellulose concentration and increasing processing temperature. At 15% concentration and short residence time region, the change of α-cellulose content was so high due to high-shear with an increase in temperature. From these processing conditions, the variations of α-cellulose content and molecular weight showed different behaviors, and these processing conditions for making cellulose solution were found to be important factors.
Keywords:cellulose;N-methylmorpholine N-oxide (NMMO);fiber & film;molecular weight;α-cellulose content.
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