己内酰胺接枝共聚改性纸浆纤维的研究

Graft Copolymerization Modification of Pulp with Hexanelactam

探讨了碱性环境中纸浆纤维与己内酰胺在过硫酸钾-亚硫酸氢钠引发体系中进行接枝共聚改性反应的主要工艺参数。结果表明,当单体己内酰胺与浆的质量比为1∶2、过硫酸钾用量10.0%(对绝干浆)、过硫酸钾和亚硫酸氢钠质量比5∶4、浆浓5.0%、反应时间3h、反应温度60℃、氢氧化钠用量4.0%时,单体接枝率可达28.6%。接枝后纸浆纤维的成纸物理强度性能提高,但成纸白度略有下降。接枝共聚改性后产物的红外光谱分析表明己内酰胺已接枝到了纸浆纤维上。

An orthogonal method and single-factor method were used to study the graft copolymerization of pulp with hexanelactam using potassium persulphate-sodium bisulfite as initiator under alkaline medium.The optimum process parameters of the grafting reaction were as follows： the mass ratio of monomer to fiber is 1∶2, the ratio of initiator to fiber is 1∶10, the ratio of potassium persulphate to sodium bisulfite is 5∶4, pulp consistency is 5%, the reaction time is 3h, the reaction temperature is 60℃. The maximum graft ratio and the mechanical properties of the handsheet can be obtained at the optimum process conditions, but the brightness of the pulp is reduced slightly. The fourier transform infrared spectroscopy spectrum indicated that the caprolactam has been successfully grafted onto the pulp.