Department of Food Engineering, Faculty of Engineering, Suleyman Demirel University, 32200 Isparta, Turkey.
Department of Food Engineering, Faculty of Engineering, Suleyman Demirel University, 32200 Isparta, Turkey.
Carbohydr Polym. 2018 Sep 1;195:180-188. doi: 10.1016/j.carbpol.2018.04.071. Epub 2018 Apr 21.
In this study, nanocellulose (NC) (2-5%, w/w) and grape seed extract (GSE) (15%, w/w) added chitosan (CH) and polycaprolactone (PCL) based active bilayer films were prepared by either coating with PCL in the form of chloroform solution (C-PCL) or compression of PCL and CH layers (P-PCL). Films were tested by means of scanning electron microscopy (SEM), water vapor permeability (WVP), tensile tests, optical and active properties (antimicrobial, and antioxidant activities), and release studies. The incorporation of NC significantly reduced WVP and opacity of films while GSE addition had an adverse effect. P-PCL films showed higher elastic modulus, tensile strength and WVP values and lower elasticity when compared to C-PCL films (p < 0.05). All film samples showed antimicrobial activity, and GSE retained its antioxidant capacity within CH matrix. The formation of the CH and PCL based bilayer films with NC and GSE improved the suitability of CH films for food packaging applications.
在这项研究中,纳米纤维素(NC)(2-5%,w/w)和葡萄籽提取物(GSE)(15%,w/w)被添加到壳聚糖(CH)和聚己内酯(PCL)基活性双层膜中,通过将 PCL 以氯仿溶液的形式(C-PCL)涂覆或压缩 PCL 和 CH 层(P-PCL)来制备。通过扫描电子显微镜(SEM)、水蒸气透过率(WVP)、拉伸试验、光学和活性特性(抗菌和抗氧化活性)以及释放研究来测试薄膜。NC 的掺入显著降低了薄膜的 WVP 和不透明度,而 GSE 的添加则产生了不利影响。与 C-PCL 薄膜相比,P-PCL 薄膜具有更高的弹性模量、拉伸强度和 WVP 值以及更低的弹性(p<0.05)。所有的薄膜样品都显示出抗菌活性,并且 GSE 在 CH 基质中保留了其抗氧化能力。NC 和 GSE 与 CH 和 PCL 形成双层膜提高了 CH 薄膜在食品包装应用中的适用性。
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