DISSOLUTION OF ETHYLENEDIAMINE-PRETREATED LIGNOCELLULOSIC MATERIAL IN LICL/DMSO AND PREPARATION OF LIGNOCELLULOSE AEROGELS
Various lignocellulosic materials,such as hardwood and softwood kraft pulps (HKP,SKP),including those with relatively high lignin content (up to ca.10.5％),can be solubilized without milling in lithium chloride/ dimethyl sulfoxide (LiC1/DMSO) by ethylenediamine (EDA) pretreatment.Because milling of the sample is not required,mechanical degradation of the cell wall components can be avoided.After the EDA pretreatment,the crystallinity of the celluloses remained as high as the original celluloses,although:the crystal structure changed.Therefore,the formation of cellulose-EDA complex seems to be critical for dissolution in the LiCl/DMSO solvent. Through this pretreatment,lignocellulosic hydrogels and aerogels were prepared from lignocellulose from 8％ LiCl/DMSO solvent system.SEM observation revealed the gels nanofibrillar network,characterized by fairly uniform fibrils about 20-30 nm wide and 1001000 nm long segments.
dissolution of lignocellulosic material LiCl/DMSO cellulose-EDA complex lignocellulosic aerogel
Zhiguo Wang Yuji Matsumoto Shigenori Kuga
Department ofBiomaterial Sciences,Graduate School of Agricultural and Life Sciences,The University o Department of Biomaterial Sciences,Graduate School of Agricultural and Life Sciences,The University
国际会议
16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)
天津
英文
1360-1363
2011-06-08（万方平台首次上网日期，不代表论文的发表时间）