Characterization of the pulp-like fibers separated from sugi [Cryptomeria japonica wood] with L-lactic acid
2008
Kajimoto, T.(Wakayama-ken. Industrial Technology Center (Japan)) | Tachibana, Y. | Maeda, Y. | Kubota, S. | Hata, T. | Imamura, Y.
The characterization of the process of separating cellulose fibers from wood by using L-lactic acid was investigated. Sugi (Cryptmeria japonica) were cooked with L-lactic acid at 200degC for 1hr to be separated as pulp-like fibers and liquefied wood components. The pulp-1ike fibers were analyzed with molecular weight, SEM, X-Ray diffractions, IR, and sup(13)C NMR. Molecular weight was about 1.1 x 10E6-1.5 x 10E6. The crystals of the pulp-like fibers were type I and the crystallinity was 23-25%. The pulp-like fibers were esterified with L-lactic acid. It was concluded that the cooking the wood with L-lactic acid was a significant separation system, that the delignification occurred by acid hydrolysis and decomposition, and that esterified cellulose derivatives were produced from wood material.
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