多元羧酸与木材酯化反应的固体核磁共振谱CPMAS^(13)CNMR的表征  

THE STUDY ON ESTERIFICATION REACTION BETWEEN WOOD AND POLYCARBOXYLIC ACID BY CP/MAS^(13) C NMR-SPECTRA

作　　者：方桂珍[1] 李坚[1] 孔漫[2] 上原徹 古野毅 

机构地区：[1]东北林业大学,哈尔滨150040 [2]中国医学科学院药物研究所,北京100001 [3]岛根大学

出　　处：《林业科学》2001年第2期108-111,共4页Scientia Silvae Sinicae

基　　金：国家自然科学基金项目!39910 5 94资助

摘　　要：本研究要用以多元羧酸为酯化剂 ,以无机盐为催化剂的交联体系。这一体系是新型的、水溶的、无毒害、无污染的非甲醛系试剂并联体系。本文采用固体核磁共振谱CP MAS1 3 CNMR ,测定木材主要组分酯化反应的CP MAS1 3 CNMR波谱 ,归属主要谱线 ,分析了多元羧酸与木材交联反应过程中主要组分的化学结构变化。结果表明 :酯化反应后 ,羧基碳的比率增加 ;芳香族碳和羟基碳的比率减少 ;烷基碳的变化随着羧基碳的变化而改变。Polycarboxylic acids acted as esterification agents and inorganic salts acted as catalyst in the wood crosslinking reaction. This new and soluble crosslinking system is poison free and pollution free system. In this paper, the CP/MAS 13 C NMR spectra of wood components were determined, main chemical shifts were signed and the changes of chemical constrcture were analyzed in esterification between wood and polycarboxylic by CP/MAS 13 C NMR spectra. Results showed: after esterification, the ratios of carboxyl and ester carbon increased, the ratios of aromatic and hydroxyl carbon decreased and the ratios of alkyl carbon changed with carboxyl carbon. This conclusion is the same as that by FTIR and ESCA spectra.

关 键 词：多元羧酸 木材 酯化反应 固体核磁共振谱 化学成分 科学结构 

分 类 号：TQ352.1[化学工程] TQ351.0