海藻酸钠/壳聚糖复合纸的制备及性能研究

Studies on Preparation and Properties of Alginate/Chitosan Composite Paper

目的研究海藻酸钠/壳聚糖对纸张的增强作用及制得复合纸对色素及金属离子的等温吸附特性,实现海藻酸钠/壳聚糖在纸张中的复合应用。方法依次采用阴离子多糖海藻酸钠、阳离子多糖壳聚糖季铵盐对纤维素滤纸进行浸渍干燥处理。结果相比滤纸基材,复合纸的抗张强度提高了119%,耐破度提高了105%。红外检测显示,复合纸的氢键吸收峰变宽、变高,说明材料中的氢键结合力变强。吸附等温线拟合显示,制得的复合纸对甲基橙色素具有较好的吸收性能。对Cu2+的吸附符合Langmuir及Freundlich模型方程,属于单分子层吸附。结论海藻酸钠/壳聚糖可用于制备具有一定吸附性能的复合纸,并能增强其力学性能。

The work aims to realize the composite application of alginate/chitosan by studying the effect of alginate/chitosan loading on the paper and the isothermal absorption property of the prepared composite paper for the pigment and metal ion. The cellulose filter paper was immersed and dried by anionic polysaccharide alginate and cationic polysaccharide chitosan quaternary ammonium salt in order. Compared with the filter paper base, the tensile strength and bursting strength were increased by 119% and 105%, respectively. Fourier transform infrared spectroscopy（FTIR） detection showed that the adsorption peaks of hydrogen bonds were broader and higher in composite paper, indicating an increased hydrogen bonding force. The adsorption isotherm fitting indicated that, the prepared composite paper showed good absorption properties for methyl orange, and its adsorption to Cu2＋ conformed to Langmuir and Freundlich model equations, belonging to a monolayer adsorption. It is concluded that alginate/chitosan can be used to prepare mechanically enhanced composite paper with certain adsorption performance.