多胺型纤维素基螯合纤维的合成和光谱学研究

将漂白化学桉木浆(BCEP)与甲基丙烯酸缩水甘油酯(GMA)的接枝共聚产物(CPGMA)与乙二胺(EDA)反应，合成了多胺型纤维素基螯合纤维CPGMA-EDA。利用傅里叶变换红外光谱(FTIR)、固体核磁共振碳谱(13C CP/MAS NMR)和X射线衍射(XRD)对产物进行了分析。FTIR和13C CP/MAS NMR的研究结果表明，与EDA反应后，CPGMA在904 cm-1波数处的环氧基特征吸收峰基本消失，3 200～3 500 cm-1处的吸收峰因新增N—H伸缩振动而明显增宽，说明大量氨基通过开环反应被接枝到了CPGMA表面;XRD结果表明所得纤维素基螯合纤维的结晶度为48.1%，相对于原漂白化学桉木浆的结晶度下降了31.0%，说明反应不仅发生在纤维素的非结晶区，同时也发生在结晶区。

Synthesis and Spectroscopic Study of Polyamine-Type Cellulose-Based Chelating Fiber

The graft copolymer (CPGMA) made from bleached chemical eucalyptus pulp (BCEP) and glycidyl methacrylate (GMA) was reacted with ethylenediamine (EDA) to synthesize the polyamine-type cellulose-based chelating fiber CPGMA-EDA. The chelating fiber was characterized by means of Fourier transform infrared spectroscopy (FTIR), 13C cross polarization magic angle spinning NMR spectra (13C CP/MAS NMR) and X-ray diffraction (XRD). The results of FTIR and 13C CP/MAS NMR show that the characteristic absorption peak (904 cm-1) of epoxy group in CPGMA disappeared, and the absorption peak around 3 200-3 500 cm-1 broadened due to the vibration of new formed N—H bond while the CPGMA reacted with EDA. Both of these indicate that amino group was grafted onto CPGMA through the ring-opening reaction. The XRD results indicate that the crystallinity of CPGMA-EDA was 48.1%, and decreased by 31.1% compared to that of BECP, indicating that the reaction not only takes place in the noncrystal regions, but also in the crystal regions of cellulose.