Study on Mechanism of Wood Surface Non  polarization  Part Ⅲ. The Difference of Esterification Ability of Wood Main Composites

QIN Te  fu; YAN Hao  peng

doi:10.19455/j.mcgy.2000.04.004

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Study on Mechanism of Wood Surface Non polarization Part Ⅲ. The Difference of Esterification Ability of Wood Main Composites
1. Research Institute of Wood Industry, Chinese Academy of Forestry
Issue 4, Pages: 13-15(2000)
DOI： 10.19455/j.mcgy.2000.04.004

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[1]秦特夫,阎昊鹏.木材表面非极性化原理的研究.Ⅲ各化学组分在乙酰化过程中酯化能力的差异[J].木材工业,2000(04):13-15+18.

QIN Te fu, YAN Hao peng. Study on Mechanism of Wood Surface Non polarization Part Ⅲ. The Difference of Esterification Ability of Wood Main Composites. [J]. China Wood Industry (4):13-15(2000)
[1]秦特夫,阎昊鹏.木材表面非极性化原理的研究.Ⅲ各化学组分在乙酰化过程中酯化能力的差异[J].木材工业,2000(04):13-15+18. DOI： 10.19455/j.mcgy.2000.04.004.

QIN Te fu, YAN Hao peng. Study on Mechanism of Wood Surface Non polarization Part Ⅲ. The Difference of Esterification Ability of Wood Main Composites. [J]. China Wood Industry (4):13-15(2000) DOI： 10.19455/j.mcgy.2000.04.004.

摘要

本文对“三北”一号杨和杉木中分离出的纤维素、半纤维素、综纤维素、木质素在酯化过程中酯化能力的差异和木材抽出物对木材酯化增重率的影响进行了研究。结果表明 :纤维素的酯化增重率较低 ,杉木和“三北”一号杨的纤维素酯化增重率在反应 2 .5h后仅为 1 .9%和 3.2 % ;在乙酰化过程中半纤维素会大量水解 ;综纤维素的酯化增重率主要是由于半纤维素酯化的结果 ;木质素的酯化反应在 1 h内就基本完成。且杉木木质素的酯化能力比“三北”一号杨木质素的酯化能力要强 ;木材中的抽出物会影响木材乙酰化反应的酯化增重率 ,“三北”一号杨木材的抽出物对木材的酯化增重率的提高产生有利的作用。而杉木中的抽出物对木材的酯化增重率的提高产生不利的影响

Abstract

In the report, the difference of esterification ability of the main composites of two species of wood Chinese Fir (Cunninghamia lanceolata) and Poplar “Sanbei" No. 1 (Populus nigra×P.simonii) and the effect of wood extractives on wood weight increase during esterification were investigated. The results showed: the esterification weight percent gain ( WPG ) of cellulose was lower, during the process of acetylation hemicellulose was hydrolysis, the main part of holocellulose WPG was contributed by hemicellulose and the esterification ability of Chinese Fir lignin was higher than that of “Sanbei" No.1. The extractives could effect acetylation reaction of wood, it is advantageous to the acetylation of "Sanbei" No.1 and disadvantageous to acetylation of Chinese Fir.