目的 探究不同涂层配方参数对纸基涂布样品耐水耐油、阻湿及阻氧性能的影响规律,以筛选优选配方。方法 采用水性涂布结合热压工艺,通过调控聚羟基脂肪酸（PHA）蜡乳液（Wax）中的PHA含量与聚乙烯醇（PVA）-聚乙烯亚胺（PEI）体系中的偶联剂（HY-Si75） 用量,分别制备了PHA含量为10%~30%的PHA-Wax涂布纸样,以及HY-Si75用量为0.07%~0.28%的硅烷交联PVA-PEI-蒙脱土（MMT）涂布纸样。通过测试水蒸气渗透率（WVP）、氧气透过率（OTR）、可勃吸水（Cobb）值及耐油脂（KIT）等级,综合评价不同配方下涂布纸样品的性能。结果 PHA-Wax显著提升了阻湿、耐水耐油性能,PHA30%使WVP由原纸2.03×10-11 g·cm/(cm2·s·Pa) 降至8.85×10-13 g·cm/(cm2·s·Pa),Cobb值（30 min）降至（9±3.56）g/m2,KIT值为12。PVA-PEI-MMT(HY-Si75 0.14%)体系的OTR低至（2.61±0.09）×10-4 cm3/(m2·d·Pa)。结论 最优配方为PHA30%与PVA-PEI-MMT (HY-Si75 0.14%),两体系分别侧重阻湿、耐水耐油与阻氧性能,可用于后续组装的优选组合,为纸基高阻隔包装材料的工程化开发提供依据。
Abstract
The work aims to explore the effects of coating formulation parameters on the water/oil resistance, moisture barrier, and oxygen barrier properties of coated paper, to screen the optimal formulations. PHA-Wax coated paper samples with a PHA content of 10%-30% and silane-crosslinked PVA-PEI-MMT coated paper samples with a HY-Si75 dosage of 0.07%-0.28% were prepared by combining water-based coating with hot pressing and regulating the PHA content in polyhydroxyalkanoate (PHA) wax emulsion (Wax) and the dosage of coupling agent (HY-Si75) in the polyvinyl alcohol (PVA)-polyethylenimine (PEI) system. The performance of coated paper samples with different formulations was comprehensively evaluated by testing water vapor permeability (WVP), oxygen transmission rate (OTR), Cobb value, and KIT rating. The PHA-Wax coating significantly improved the moisture, water, and oil resistance of the paper. PHA30% reduced the WVP from 2.03×10-11 to 8.85×10-13 g·cm/(cm2·s·Pa), lowered the Cobb (30 min) value to (9±3.56)g/m2, and increased the KIT rating to 12. The PVA-PEI-MMT coating with 0.14% HY-Si75 showed the lowest OTR of (2.61±0.09)×10-4 cm3/(m2⋅d⋅Pa). PHA30% and PVA-PEI-MMT with 0.14% HY-Si75 are identified as optimal formulations. The two systems are superior in moisture barrier, water and oil resistance, and oxygen barrier properties respectively, serving as the preferred combinations for subsequent assembly. This provides a theoretical basis for the engineering development of high-barrier paper-based packaging materials.
关键词
涂布纸 /
聚羟基脂肪酸酯 /
硅烷交联 /
水蒸气阻隔 /
氧气阻隔
Key words
coated paper /
polyhydroxyalkanoate (PHA) /
silane crosslinking /
water vapor barrier /
oxygen barrier
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基金
上海市科技创新行动计划（23N31900200）
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