胺基化纤维素纤维纸的制备及除甲醛性能的研究

Preparation of Aminated Modified Paper and Study on Its Formaldehyde Removal Property

关键词:  硫酸盐阔叶木浆  胺基化纤维素  甲醛去除率  环氧氯丙烷  二乙烯三胺

Key Words:kraft hardwood pulp  aminated cellulose  formaldehyde removal rate  epichlorohydrin  diethylene triamine

摘要:使用环氧氯丙烷和二乙烯三胺（EDTA）对硫酸盐阔叶木浆进行胺基化改性，通过湿法造纸制备了天然、除甲醛的生物基功能纸材料，并对其进行实验检测，针对反应条件、理化性质以及除甲醛机理进行了讨论。通过傅里叶变换红外光谱仪（FT-IR）、X射线光电子能谱仪（XPS）、扫描电子显微镜（SEM）表征，证明了硫酸盐阔叶木浆被成功胺基化，并对改性成功的纤维素进行热稳定性能分析。在密封的环境中，用多功能负氧离子检测仪进行胺基化纤维素纤维纸的除甲醛性能检测，结果表明，当纤维素∶环氧氯丙烷质量比为1∶5、NaOH质量分数为8%、环氧化纤维素（OPFs）∶EDTA质量比为1∶3时，胺基化纤维素纤维纸对甲醛具有显著的去除效果，对甲醛的去除率可达77.15%。胺基化纤维素纤维纸的物理性能结果显示，由于改性导致氢键数量减少，纸张抗张指数由48.3 N·m/g降低到29.0 N·m/g，透气度由26.5 L/(m²·s)升高到50.2 L/(m²·s)，松厚度由1.94 cm³/g增大到2.04 cm³/g。

Abstract:The kraft hardwood pulp was modified by epichlorohydrin and diethylenetriamine （EDTA）， and the natural formaldehyde free bio-based functional paper material was prepared by making modified pulp. The aminated cellulose fiber paper was tested， and its reaction conditions， physical and chemical properties and formaldehyde removal mechanism were discussed. Through fourier transform infrared spectroscopy （FT-IR）， X-ray photoelectron spectroscopy （XPS）， scanning electron microscopy （SEM）， it was proved that the kraft hardwood pulp was successfully aminated， and the thermal stability of the modified cellulose was analyzed. In a sealed environment， the formaldehyde removal performance of the aminated cellulose fiber paper was tested with a multi-function negative oxygen ion detector. The results showed that the aminated cellulose fiber paper had a significant removal effect on formaldehyde， and the removal rate of formaldehyde was 77.15%， when the mass ratio of original cellulose∶epichlorohydrin was 1∶5， the mass fraction of sodium hydroxide was 8%， and the mass ratio of epoxide cellulose （OPFs）∶ EDTA was 1∶3. The physical properties of aminated cellulose fiber paper were tested， and the number of hydrogen bonds decreased due to modification， which reduced the tensile index of paper from 48.3 N·m/g to 29.0 N·m/g， increased the air permeability from 26.5 L/（m²·s） to 50.2 L/（m²·s）， and increased the bulk from 1.94 cm³/g to 2.04 cm³/g.