摘要
本研究使用Ｂｊｒｋｍａｎ的提取方法，分离出针叶材杉木和阔叶材“三北”一号杨的磨木木质素（ＭＷＬ），并采用Ｌｕｎｄｇｕｉｓｔ方法对分离出的ＭＷＬ进行提纯。用红外光谱仪（ＦＴＩＲ）、超导核磁共振波谱仪（１ＨＮＭＲ）、液相色谱（ＨＰＬＣ）及紫外／可见分光光度仪（ＵＶ）测定了这两个树种ＭＷＬ的化学结构和官能团。结果表明：（１）杉木木质素碳的含量较杨树高１２３％，氢和氧的含量分别低０２２％和０８５％，“三北”一号杨木质素中的甲氧基含量比杉木的高６２６％。（２）杉木和“三北”一号杨两种磨木木质素的苯基丙烷结构单元的经验式分别为Ｃ９Ｈ８．０８Ｏ２．４６（ＯＣＨ３）０．９４和Ｃ９Ｈ７．８６Ｏ２．３３（ＯＣＨ３）１．４１。（３）杉木磨木木质素中的脂肪族羟基（ＯＨａｌｉｐｈ）和酚羟基（ＯＨｐｈ）数在每Ｃ９单元中分别是０９３和０２５，分别占总羟基的７８８％和２１２％。“三北”一号杨磨木木质素中的脂肪族羟基（ＯＨａｌｉｐｈ）和酚羟基（ＯＨｐｈ）数在每Ｃ９单元中分别是１０２和０４９，分别占总羟基的６７５％和３２５％。（４）杉木与“三北”一号杨磨木木质素在２１０ｎｍ附近的吸收波长基本相同。但在２８０ｎｍ附近杨树?
Milled wood lignins (MWL) is isolated from Chinese fir and poplar “Sanbei” No.1 wood. The lignins are characterized on the basis of FTIR, UV, HPLC, 1HNMR spectroscopy and elemental analyses. The results show that: (1)The carbon content in Chinese fir lignin is 1 23% higher than that in poplar “Sanbei” No.1 lignin, but the hydrogen and oxygen contents are respectively 0.22% and 0.85% lower than those in poplar “Sanbei” No.1 lignin. (2)The empirical formulas of C 9 are calculated for Chinese fir lignin and poplar “Sanbei” No.1 lignin as C 9H 8.08 O 2.46 (OCH 3) 0.94 and C 9H 7.86 O 2.33 (OCH 3) 1.41 , respectively based on their methoxyl contents and elemental composition. (3)The OH aliph is 78.8% in total numbers of hydroxyl groups of Chinese fir lignin, and the OH ph is 21.2%. The OH aliph is 67.5% and the OH ph is 32.5% in the poplar “Sanbei” No.1, lignin. (4)The IR spectra of Chinese fir lignin shows the typical softwood characteristics, but the poplar “Sanbei” No.1 is not absolutely coincident with the IR spectra characteristics for the temperate hardwoods. (5)The per C 9 unit average proton numbers of β O 4 structures in Chinese fir lignin and poplar “Sanbei” No.1 lignin are 0.33 and 0.50, the β 5 structures are 0 23 and 0.16, and the β β structures are 0.92 and 0.67 respectively.
出处
《林业科学》
EI
CAS
CSCD
北大核心
1999年第3期69-75,共7页
Scientia Silvae Sinicae
基金
国家自然科学基金
关键词
杉木
磨木木质素
“三北”一号杨
化学官能团
Chinese fir MWL, Poplar “Sanbei” No.1 MWL, Chemical structure characteristics
