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首页> 外文期刊>Journal of Applied Polymer Science >Importance of the structure of paper support in gas transfer properties of protein-coated paper
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Importance of the structure of paper support in gas transfer properties of protein-coated paper

机译：纸支撑结构在蛋白涂层纸的气体转移性能中的重要性

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Composite materials made from fibrous support coated with agro-polymers are widely commercialized for different applications. But, their transfer properties have only been sparingly studied despite their importance in membrane technologies or food packaging. Furthermore, most of past studies on the topic have been focused on the impact of surface properties of the support on the final coated material structure and its properties; leaving unexplored the potential impact of the in-bulk structure of the support. This study demonstrated the influence of in-bulk structure and especially fibers refining degree of 4 kraft papers (SP28, 36, 60, and 80) on the structure, and surface and gas transfer properties of their respective wheat gluten (WG) coated papers (WGP28, 36, 60, and 80). Paper presenting a high fibers refining degree (SP28) exhibited very tight and narrow in bulk fibers network which prevented most of the WG-coated layer penetration, maintaining an important WG apparent layer on top of the paper and a small fibers/wheat gluten composite zone inside (WGP28). Such structure gave strong "WG-like" properties to the final coated material with moderate oxygen permeation and high permselectivity (1.50 × 10~(-11) mol m~(-2) s~(-1) Pa~(-1) and 8.09, respectively for WGP28) whereas the highly impregnated structure of coated papers built on lowly refined papers (SP80, with wide and loose structure) gave coated materials presenting weak "WG-like" properties, supposedly due to a thick composite zone presenting interfacial defects, with higher oxygen permeation and very limited permselectivity (11.90 × 10~(-11) mol m~(-2) s~(-1) Pa~(-1) and 1.06, respectively for WGP80).
机译：由涂覆有农业聚合物的纤维载体制成的复合材料被广泛商业化用于不同的应用。但是，尽管它们在膜技术或食品包装中很重要，但对其转移特性的研究很少。此外，过去有关该主题的大多数研究都集中在载体表面性能对最终涂层材料结构及其性能的影响上。尚未研究支撑的内置结构的潜在影响。这项研究证明了4种牛皮纸（SP28、36、60和80）的本体结构，尤其是纤维的细化程度对其各自的小麦面筋（WG）涂布纸的结构以及表面和气体传递性能的影响（ WGP28、36、60和80）。呈现高纤维细化度（SP28）的纸在散装纤维网络中表现出非常紧密和狭窄的状态，这阻止了大部分WG涂层的渗透，从而在纸上保持了重要的WG表观层以及小的纤维/小麦面筋复合材料区域内部（WGP28）。这种结构使最终的涂层材料具有很强的“ WG状”特性，具有适度的氧渗透和高的选择性（1.50×10〜（-11）mol m〜（-2）s〜（-1）Pa〜（-1）分别为WGP28和8.09），而在低精度纸（SP80，结构较宽和较疏松）上构建的涂料纸的高度浸渍结构，使涂料表现出较弱的“ WG状”特性，这可能是由于存在界面的较厚复合区域所致缺陷，具有更高的氧渗透性和非常有限的渗透选择性（WGP80分别为11.90×10〜（-11）mol m〜（-2）s〜（-1）Pa〜（-1）和1.06）。

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