阳离子聚丙烯酰胺基复合增强剂对瓦楞原纸增强作用研究

Cationic Polyacrylamide Crosslinking Complex as a Strengthening Agent of Corrugating Medium

目的探讨CPAM-HPCS-PAE复合增强剂作为增干、湿强剂在瓦楞原纸中的应用效果,并与CPAM增强剂和CPAM/HPCS/PAE混合物比较增强效果。方法将羟丙基壳聚糖(HPCS)、CPAM及PAE树脂通过交联反应制得CPAM-HPCS-PAE复合增强剂。结果 CPAM-HPCS-PAE复合增强剂质量分数为0.5%时,纸张具有较好的机械强度,与单独使用CPAM增强剂和CPAM/HPCS/PAE混合物相比,该复合增强剂不但能明显提高瓦楞原纸的干强性能,而且还能显著改善其湿强性能。SEM及光散射系数检测结果表明,CPAM-HPCS-PAE复合增强剂的加入能够显著改善纸张纤维之间的交织,增加纤维之间的结合面积,从而对纸张起到增强作用。结论 CPAM-HPCS-PAE复合增强剂不但具有良好的增干强性能,而且具有一定的增湿强性能。

This work mainly discussed the usage of CPAM-HPCS-PAE complex as a strengthening agent of corrugating medium and the performance enhancement was compared with CPAM and CPAM/HPCS/PAE mixture. The strengthening agent was prepared with hydroxypropyl chitosan（HPCS）, CPAM and PAE resin through the cross-linking reaction. All results showed that the optimal addition of CPAM-HPCS-PAE complex was 0.5%, and the dry and wet strength properties of the corrugating medium after the addition of this agent were improved compared with those of CPAM and CPAM/HPCS/PAE mixture. SEM and light scattering results indicated that the intertexture between the paper fibers and the fiber bonding area was efficiently improved after the addition of CPAM-HPCS-PAE complex, thus increasing the strength of paper sheets. In conclusion, both the dry and wet strength properties of the corrugating medium were significantly improved after the addition of CPAM-HPCS-PAE complex.