壳聚糖/纤维素纤维复合纸的制备及性能研究

Study on Preparation and Properties of Chitosan/Cellulose Fiber Composite Paper

关键词:  复合纸  壳聚糖  包装材料  耐水性能

Key Words:composite paper  chitosan  packaging materials  water resistance

摘要:本研究采用浸渍工艺将壳聚糖填充到纸张的孔隙中形成密实的结构，制备具有优异综合性能的壳聚糖/纤维素纤维复合纸，并对其光学性能、力学性能和耐水性能进行表征。结果表明，壳聚糖分别与桉木浆、苇浆、杉木浆、麻浆纤维制备的复合纸均呈现出优异的光学与力学性能。其中壳聚糖/桉木浆纤维复合纸（70 g/m²，壳聚糖用量60%）的性能最佳，其透明度为88％，雾度为88％，拉伸强度和韧性分别达到75.0 MPa和7.68 MJ/m³，平均耐折度超过5000次；同时壳聚糖的加入赋予了复合纸较佳的耐水性，在达到43.9%饱和吸水率时，复合纸厚度仅增大12.5%，且达到38.1%的湿抗张强度保留率。

Abstract:In this paper， a composite paper was prepared through filling chitosan into porous structure of paper by an impregnation process and its optical and mechanical properties as well as water resistance were investigated . The results indicated that all composite papers preparing with the papers from the pulps of eucalyptus， reed， fir and jute and chitosan exhibited excellent optical and mechanical properties. Among these composite papers， chitosan/eucalyptus fiber composite paper （70 g/m² in basis weight， containing 60% chitosan） had the optimum properties， which showed a transparency of 88%， an optical haze of 88%， a tensile strength of 75.0 MPa， a toughness of 7.68 MJ/m³， and an average folding endurance of over 5000 times. Meanwhile， it showed a good water resistance， approximately 38.1% of its wet tensile strength was retained after saturated water absorption reached 43.9%， with a merely 12.5% increasing in its thickness.