【摘要】 构建阳离子淀粉（CS）和纳米纤维素（NC）的CS/NC复合体系，探索其在食品软包材料中的应用价值。本研究选取打浆度24°SR针叶木浆和打浆度36°SR阔叶木浆作为基纸原料，系统研究了浆内/表面施胶CS/NC复合体系对纸张性能的影响。将CS/NC复合体系用于基纸的浆内施胶，当CS添加量为1.0%（相对于绝干浆，以下同）、纤维素纳米纤丝（J-CNF）添加量0.6%时，纸张的抗张指数和撕裂指数分别达68.6 N·m/g和7.79 mN·m~2/g，相较于基纸分别提高14.1%和18.8%。将CS/NC复合体系用于基纸的表面施胶，胶料固含量为6.5%(J-CNC∶CS=1∶9，质量比)时，施胶纸张透气度下降值达99.4%；单面施胶量为6 g/m~2时，施胶纸张防油等级可达12级。更多还原

【Abstract】 Cationic starch(CS) and nanocellulose(NC) were used to construct an CS/NC composite system to explore its application value in food soft packaging materials. In this study, softwood pulp and hardwood pulp with beating degrees of 24 and 36 °SR, respectively, were selected as base paper raw materials. A systematic study was conducted on the effects of intra-slurry/surface sizing the CS/NC composite system on the properties of paper. When the CS/NC composite system was applied in intra-slurry sizing, CS was added at a mass fraction of 1. 0%(relative to the oven dry fiber weight, hereafter) with cellulose nanofibers(J-CNF) of 0. 6%, the tensile index and tearing index of the handmade sheet reached 68. 6 N·m/g and 7. 79 mN·m~2/g, respectively, representing increases of 14. 1% and 18. 8% compared to the base paper. When the CS/NC composite system was applied in surface sizing, the air permeability of sized paper decreased by 99. 4% at cement solid content 6. 5%, with a mass ratio cellulose nanocrystal(J-CNC) to CS of 1∶9. Additionally, when the amount of single-sided sizing was 6 g/m~2, the oil-proof grade of sized paper achieved grade 12.更多还原