AN AQUEOUS PROCESS FOR THE SEPARATION OF CELLULOSE FROM BIOMASS

作者：Alam Md Nur; Van De Ven Theo G M^*

来源：J-FOR-Journal of Science & Technology for Forest Products and Processes, 2014, 4(3): 22-26.

This paper describes the development of a new process which separates the cellulose and part of the hemicellulose from biomass, leaving the lignin with the remaining hemicelluloses in place. Cellulose and hemicelluloses are chemically modified using an aqueous oxidant (periodate) and the resulting oxidized cellulose dissolved in hot water. The separated cellulose consists of a neutral water-soluble polymer (DAC, dialdehyde cellulose) and a weakly charged polymer (DAHC, dialdehyde hemicellulose). C-13 solid-state NMR on dried DAC shows that the hemicelluloses are attached to the DAC. Optical microscopy and SEM images reveal that DAC dissolution leaves the lignin structure intact (i.e., lignin remains in its native state) without any degradation of fibre structure. According to C-13 solid-state NMR data, chemically modified hemicelluloses are also attached to lignin.

• 出版日期2014