Fabrication of food-safe superhydrophobic cellulose paper with improved moisture and air barrier properties
Fabrication of food-safe superhydrophobic cellulose paper with improved moisture and air barrier properties
复制标题
具有改进的水分和空气阻隔性能的食品安全超疏水纤维素纸的制造
DOI：
10.1016/j.carbpol.2019.01.107
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发表时间：
2019-05-01
影响因子：
11.2
通讯作者：
Peng, Lincai
中科院分区：
文献类型：
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作者：
Li, Hui;He, Yunqing;Peng, Lincai
在本研究中，我们提出了一种制备具有改善的水分和空气阻隔性能的食品安全的超疏水包装纸的简便方法，该方法将聚合物-纳米粘土杂化多层膜的构建与随后的巴西棕榈蜡处理相结合。采用层层组装法制备了卡拉胶（CR）/壳聚糖（CS）/蒙脱土（MMT）/壳聚糖四层复合材料的聚合物-纳米粘土杂化多层膜。研究了CR/CS/MMT/CS多层复合改性纸的表面化学组成、电位和形貌。用蜡处理的（CR/CS/MMT/CS）2多层改性的纸样品得到151.4度的水接触角。与原始纸相比，该超疏水纸样品显示出相当的拉伸强度和对水蒸气和空气的优异阻隔性能。此外，所得纸用于草莓包装在室温下，它是非常有效的，在减少重量损失和保持可滴定酸度相比，未包装的草莓，这可能是一个很大的潜力，作为食品包装材料。
We presented a facile method for preparing a food-safe superhydrophobic packaging paper with improved moisture and air barrier properties in this study, which is combining construction of polymer-nanoclay hybrid multilayers with subsequent carnauba wax treatment. The polymer-nanoclay hybrid multilayers consisting of quadlayers of carrageenan (CR)/chitosan (CS)/montmorillonite (MMT)/CS were created using layer-by-layer (LbL) assembly. The surface chemical compositions, potentials and morphologies of the CR/CS/MMT/CS multilayer-modified paper samples were investigated. The paper sample modified with a wax-treated (CR/CS/MMT/CS) 2 multilayer gave a water contact angle of 151.4 degrees. Compared with original paper, this superhydrophobic paper sample showed comparable tensile strength and excellent barrier properties against water vapor and air. Moreover, the obtained paper was used for strawberries packaging at ambient temperature, and it was very effective at reducing the weight loss and maintaining titratable acidity compared with the unpackaged strawberries, which might has a great potential as food packaging materials.