青檀皮浆的不同漂序对宣纸性能的影响

Effect of Different Bleaching Sequences of Pteroceltis tatarinowii Bark Pulp on the Properties of Xuan Paper

关键词:  青檀皮  漂白  纸浆性能  宣纸  润墨性

Key Words:Pteroceltis tatarinowii bark  bleaching  pulp property  Xuan paper  ink permeability

摘要:本研究以青檀皮浆为原料，研究了不同漂序对青檀皮纸浆性能及抄造宣纸性能的影响，评价了3种漂白青檀皮浆宣纸的物理性能和润墨性，并与商品宣纸进行了比较。结果表明，D(EP)和OQP 2种漂序制备的漂白青檀皮浆在白度、黏度、纸张物理强度方面均优于采用Ca(ClO)₂漂白制备的商品浆，其中D(EP)漂白青檀皮浆的白度、黏度、裂断长、耐破指数、撕裂指数和耐折度最大，分别为84.5%、903 mL/g、5.78 km、4.26 kPa·m²/g、22.1 mN·m²/g和1 420次。PP漂序制备的漂白青檀皮浆在纸张物理强度方面略低于商品浆。3种漂白青檀皮浆宣纸与商品宣纸相比，D(EP)和OQP 2种漂白青檀皮浆宣纸在白度、纸张物理强度和耐老化白度下降值方面均优于商品宣纸，其中，D(EP)漂白青檀皮浆宣纸在白度、裂断长、撕裂指数和耐老化白度下降值方面最优，分别为特皮：78.1%、3.82 km、12.1 mN·m²/g和1.03%，净皮：77.3%、3.24 km、11.7 mN·m²/g和1.54%，棉料：75.7%、3.30 km、9.53 mN·m²/g和2.76%。PP漂白青檀皮浆宣纸在纸张物理强度方面略低于商品宣纸。在紧度和润墨性上，PP、D(EP)和OQP 3种漂白青檀皮浆宣纸与商品宣纸基本一致。

Abstract:This study investigated the effects of different bleaching sequences on the pulp properties of Pteroceltis tatarinowii bark and the resulting paper properties. Three types of bleached Pteroceltis tatarinowii bark pulps were evaluated in terms of their physical properties and ink permeability when used to produce Xuan paper， and the results were compared with those of commercial Xuan paper. The results showed that the D(EP) and OQP bleaching sequences produced pulps with superior brightness, viscosity, and paper strength compared to commercial pulps bleached with Ca(ClO)₂. Among them, the D(EP) bleached pulp exhibited the highest brightness (84.5%), viscosity (903 mL/g), breaking length (5.78 km), bursting index (4.26 kPa·m²/g), tearing index (22.1 mN·m²/g), and folding endurance (1 420 times). The PP bleached pulp showed slightly lower paper physical strength compared to the commercial pulp.Comparing the papers made from the three bleached Pteroceltis tatarinowii bark pulps with commercial Xuan paper, both D(EP) and OQP bleached pulps yielded superior brightness, physical strength, and resistance to brightness loss during aging. Specifically, Xuan papers made from D(EP) bleached pulp achieved the best in terms of brightness, breaking length, tearing index, and the brightness loss after aging, respectively: Te Pi, 78.1%, 3.82 km, 12.1 mN·m²/g, and 1.03%; for Jing Pi, 77.3%, 3.24 km, 11.7 mN·m²/g, and 1.54%; and for Mian Liao, 75.7%, 3.30 km, 9.53 mN·m²/g, and 2.76%. The PP bleached pulp-based Xuan paper showed slightly lower physical strength than the commercial counterpart. In terms of bulk density and ink permeability, all three bleached pulps—PP, D(EP), and OQP—produced papers comparable to commercial Xuan paper.