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Preparation and performance of composite films based on 2-(2-aminoethoxy) ethyl chitosan and cellulose

机译：基于2-（2-氨基乙氧基）乙基壳聚糖和纤维素的复合膜的制备及性能

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摘要

In this study, antioxidant active films were prepared from 2-(2-aminoethoxy) ethyl chitosan (AECs, a novel chitosan derivative) and cellulose under an environmentally friendly process using ionic liquids (ILs). AEC/cellulose composite films were prepared by efficiently blending AECs into cellulose N-methylmorpholine N-oxide (NMMO)/H2O solution, followed by shaping in a mold. The microstructure, physical, mechanical and antioxidant properties of the composite films were measured. The resulting composite films exhibited good physical properties, favorable mechanical properties and a high free radical scavenging activity against 2,2-diphenyl-1-picrylhydrazyl (DPPH) in methanol. Furthermore, a loading of AECs at 5% into cellulose resulted in significant improvement in antioxidant activity (86.5% ± 2.7%), while a slight decrease in the tensile strength (2.9% ± 0.2%) was noted. This result indicated that the oxidation resistance can be greatly improved by incorporation of AECs without significantly affecting the mechanical properties. The bioactive composite film is expected to be a promising material for potential applications in food packaging.
机译：在这项研究中，抗氧化剂活性膜是由2-（2-氨基乙氧基）乙基壳聚糖（AEC，一种新型壳聚糖衍生物）和纤维素在环境友好的过程中使用离子液体（IL）制备的。通过将AEC有效地掺入纤维素 N -甲基吗啉N-氧化物（NMMO）/ H 2 O溶液中，制备AEC /纤维素复合膜，然后通过在模具中成型。测量了复合膜的微观结构，物理，机械和抗氧化性能。所得的复合膜在甲醇中表现出良好的物理性能，良好的机械性能和对2，2-二苯基-1-吡啶并肼基（DPPH）的高自由基清除活性。此外，在纤维素中添加5％的AEC可以显着提高抗氧化活性（86.5％±2.7％），而拉伸强度则略有下降（2.9％±0.2％）。该结果表明，通过掺入AEC可以大大提高抗氧化性，而不会显着影响机械性能。该生物活性复合膜有望成为食品包装中潜在应用的有前途的材料。

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