巨尾桉化学改性预处理工艺  

Pretreatment Technology of Eucalyptus grandis × E. urophylla Chemical Modification

作　　者：钟昌勇[1] 黄晋北 黄宁 周宽 周宗明[1] 

机构地区：[1]广西壮族自治区林业科学研究院,南宁530002 [2]中国质量认证中心广州分中心,广州510620 [3]广西林业技术推广总站,南宁530028 [4]广西国有高峰林场,南宁530002

出　　处：《广西林业科学》2015年第3期287-291,共5页Guangxi Forestry Science

基　　金：国家林业公益性行业科研专项(201204803)

摘　　要：为了更好地利用桉木木素进行化学改性,须有效去除桉木中的其他组分。通过单因素试验和正交试验,研究了巨尾桉改性前预处理工艺,确定桉木纤维脱脂处理溶剂为苯-乙醇(V/V,2∶1),最佳提取条件为:时间为4 h,温度66℃,固液比为1∶15。对处理前后的桉木纤维进行了性能表征,结果表明:处理后桉木纤维素酶解较处理前还原糖得率和水解率均有所提高;灰分含量降至0.09%,小分子有机化合物含量≤1%。In order to make the chemical modification utilizing Eucalyptus lignin better, other compo nents of Eucalyptus wood must be removed effectively. Pretreatment technology of Eucalyptus grndis × Eu rophylla before modification was studied through single factor test and orthogonal test. Degreasing solvent of Eucalyptus wood fiber was benzene-ethanol （ V/V, 2：1 ） . The optimum extraction condition was that extracting time was 4 hours, extracting temperature 66 ℃, and the ratio of solid to liquid 1 ： 15. Eucalyp- tus wood fiber before and after pretreatment were characterized. The results showed that reducing sugar yield and hydrolysis rate of Eucalyptus wood cellulose enzymolysis increased after pretreatment. The ash content and small molecule organic compound content after pretreatment decreased to 0. 09% and less than 1% respectively.

关 键 词：桉木 预处理 

分 类 号：S718.5[农业科学—林学]