Preparation and performance of composite films based on 2-(2-aminoethoxy) ethyl chitosan and cellulose
Preparation and performance of composite films based on 2-(2-aminoethoxy) ethyl chitosan and cellulose
复制标题
2-(2-氨基乙氧基)乙基壳聚糖与纤维素复合薄膜的制备及性能
DOI：
10.1039/c6ra26541c
复制
发表时间：
2017-01-01
期刊：
影响因子：
3.9
通讯作者：
Zhang, Hai
中科院分区：
文献类型：
--
作者：
Liu, Xiaofei;Liu, Zongbao;Zhang, Hai
本研究以新型壳聚糖衍生物2-（2-氨基乙氧基）乙基壳聚糖（AECs）和纤维素为原料，采用离子液体（ILs）环保型工艺制备了抗氧化活性膜。将AEC与n -甲基morpholine N-oxide (NMMO)/H2O混合，然后在模具中成型，制备AEC/纤维素复合膜。测试了复合膜的微观结构、物理力学性能和抗氧化性能。制备的复合膜具有良好的物理性能和力学性能，对2,2-二苯基-1-吡啶肼（DPPH）在甲醇中的自由基清除能力强。此外，在纤维素中添加5%的aec可显著提高纤维素的抗氧化活性（86.5% +/- 2.7%），而拉伸强度略有下降（2.9% +/- 0.2%）。结果表明，在不显著影响力学性能的情况下，掺入aec可显著提高材料的抗氧化性能。该生物活性复合薄膜在食品包装领域具有广阔的应用前景。
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.