论文部分内容阅读
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。这一变化趋势与采用FTIR和ESCA得到的变化趋势一致
In this study, the use of polycarboxylic acid as esterification agent, inorganic salt as a catalyst for the crosslinking system. This system is a new, water-soluble, non-toxic, non-polluting non-formaldehyde reagent parallel system. In this paper, the CP MAS1 3 CNMR spectra of the main components of wood were determined by CP MAS1 3 CNMR, which belongs to the main spectral lines. The chemical composition of the main components during the cross-linking reaction between the polycarboxylic acids and wood was analyzed . The results showed that the ratio of carboxyl to carbon increased after esterification, the ratio of aromatic carbon to hydroxy carbon decreased, and the change of alkyl carbon changed with the change of carboxyl carbon. This trend is in line with the trend achieved by FTIR and ESCA