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Pre-extraction of Hemicelluloses from Korean Mixed Hardwood Chips Using Hot Water and Alkali Solution and its Characteristics  

Cho, Hwi (Dept. of Forest Sciences, Seoul National University)
Shin, Hee-Nae (Dept. of Forest Sciences, Seoul National University)
Sim, Kyu-Jeong (Dept. of Forest Sciences, Seoul National University)
Youn, Hye-Jung (Dept. of Forest Sciences, Seoul National University)
Lee, Hak-Lae (Dept. of Forest Sciences, Seoul National University)
Publication Information
Journal of Korea Technical Association of The Pulp and Paper Industry / v.43, no.1, 2011 , pp. 83-91 More about this Journal
Abstract
Hemicelluloses are useful materials for papermaking and other biotechnological applications. To recover and further utilize the hemicelluloses, this study carried out the pre-extraction of the hemicelluloses from Korean mixed hardwoods chips using hot water and sodium hydroxide solution at various temperature and time conditions. Through the hot water pre-extraction, the wood components of 22% was extracted and the 35% of the hemicelluloses which were contained in the original wood chips were dissolved into the pre-extractives. The yield of the pre-extractives was more significantly influenced by the pre-extraction temperature than the time. The pre-extractives with the yield of 30% could be obtained by alkali pre-extraction and alkali concentration was the most important factor. It had lower hemicellulose content but high molecular weight, compared with the hot water pre-extractives.
Keywords
Hemicelluloses; pre-extraction; hot water; sodium hydroxide; yield; moelcular weight;
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