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Beeswax-chitosan emulsion coated paper with enhanced water vapor barrier efficiency

机译：具有提高的水蒸气阻隔效率的蜂蜡-壳聚糖乳液涂布纸

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摘要

For lipid-hydrocolloid emulsion based film, the increase of lipid amount would improve its water vapor barrier property, but also reduce the mechanical strength of the film in the meantime thus leading to a compromised lipid content in the film. However, when the emulsion is coated on paper surface, more lipid could be used for emulsion preparation to enhance the moisture resistance without considering the weakened strength of the film induced by lipid, because the mechanical properties of emulsion coated paper is mainly governed by the strength of base paper instead of the coating layer. In this study, beeswax-chitosan emulsion was first prepared and then coated on paper surface to improve paper's water vapor barrier and water resistance properties. The range and variance analysis of orthogonal test design showed that the order of priorities of the factors accordingly was beeswax solid content, drying temperature and chitosan concentration. The effect of drying temperature on water vapor transmission rate (WVTR) and water contact angle of coated paper was further investigated using 1.2 wt% chitosan and 96% beeswax solid content in the coating layer. The results indicated that water vapor barrier property was in accordance with the density of the coating layer. Atomic force microscope (AFM) was also used to characterize the surface morphology and explain the hydrophobicity of beeswax-chitosan coated paper. It was found that surface beeswax particles melted to wrinkle at high drying temperatures, while roughness values maintained at micro-scale over the temperature range investigated.
机译：对于基于脂质-水胶体乳液的薄膜，脂质量的增加将改善其水蒸气阻隔性，但同时也会降低薄膜的机械强度，从而导致薄膜中脂质含量的降低。但是，当将乳液涂布在纸张表面时，可以使用更多的脂质来制备乳液以提高耐湿性，而无需考虑由脂质引起的薄膜强度降低，因为乳液涂布纸的机械性能主要取决于强度。用原纸代替涂层。在这项研究中，首先制备了蜂蜡-壳聚糖乳液，然后将其涂布在纸张表面上，以改善纸张的水蒸气阻隔性和耐水性。正交试验设计的范围和方差分析表明，相应因素的优先顺序为蜂蜡固体含量，干燥温度和壳聚糖浓度。在涂层中使用1.2 wt％的壳聚糖和96％的蜂蜡固体含量，进一步研究了干燥温度对涂布纸的水蒸气透过率（WVTR）和水接触角的影响。结果表明，水蒸气阻隔性与涂层的密度一致。原子力显微镜（AFM）也用于表征表面形态并解释蜂蜡-壳聚糖涂层纸的疏水性。发现在高干燥温度下表面蜂蜡颗粒融化成皱纹，而在所研究的温度范围内粗糙度值保持在微尺度上。

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  • 来源
    《Applied Surface Science》 |2014年第1期|80-85|共6页
  • 作者

    Weiwei Zhang; Huining Xiao; Liying Qian;

  • 作者单位

    Department of Chemical Engineering, University of New Brunswick, 15 Dineen Drive, Fredericton, NB E3B 5A3, Canada ,State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China;

    Department of Chemical Engineering, University of New Brunswick, 15 Dineen Drive, Fredericton, NB E3B 5A3, Canada;

    State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Beeswax-chitosan emulsion; Coating; WVTR; Contact angle;

    机译：蜂蜡-壳聚糖乳液;涂层;WVTR;接触角;

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