한국펄프종이공학회:학술대회논문집 (Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference)
- 한국펄프종이공학회 2006년도 PAN PACIFIC CONFERENCE vol.2
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- Pages.257-263
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- 2006
Studies on the Poplar Deltoides Lignin Preparation and Effects on Its Structure Modifications
- Naithani Ved P. (Wood and Paper Science Department, NC State University) ;
- Madan R.N. (Forest Research Institute Dehra Dun.)
- 발행 : 2006.06.06
초록
This paper examines the physico-chemical properties and structural features of thio lignin and alcohol lignin preparations extracted from fast-growing poplar wood. The lignin preparations were characterized using UV, IR and alkaline nitrobenzene oxidation methods. The yield was higher in thiolignin due to its preparation from wood under drastic alkaline conditions and almost the total amount of alkaline degraded lignin was precipitated except acid soluble lignin. In case of ethanol lignin, structural modifications were comparatively less and form a cream colored lignin more or less similar to its original natural color. The methoxyl values were higher due to syringyl unit present in hard wood lignin in addition to guaicyl unit present in soft wood. The higher values of methoxyl content of isolated lignin revealed that it was built up of high syringyl units. The elementary analysis, methoxyl group and hydroxyl groups were presented by
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