College of Food Science and Engineering, Shandong Agricultural University, Engineering and Technology Center for Grain Processing of Shandong Province, Tai'an, PR China.
College of Food Science and Engineering, Shandong Agricultural University, Engineering and Technology Center for Grain Processing of Shandong Province, Tai'an, PR China; State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, PR China.
Carbohydr Polym. 2020 May 15;236:116029. doi: 10.1016/j.carbpol.2020.116029. Epub 2020 Feb 17.
The present study aims to develop an agar/maltodextrin-beeswax (A/M-BW) pseudo-bilayer film with high surface hydrophobicity by adjusting drying temperatures and homogenization conditions. Attenuated total reflectance-Fourier transform infrared determined the chemical components of the upper and lower surfaces of the films. X-ray diffraction characterized the crystalline behavior of film matrix. Scanning electron microscopy explored the distribution patterns of BW and phase separation phenomenon. Atomic force microscopy revealed the surface roughness of film. The pseudo-bilayer film prepared at 8000 rpm for 1 min (A/M-BW-8000-1) had the highest tensile strength (20.57 MPa), Young's modulus (640.60 MPa), contact angle (92.9°), and the lowest water vapor permeability (2.18 × 10 g m s Pa). The A/M-BW pseudo-bilayer film with excellent surface hydrophobicity and mechanical properties was obtained at higher drying temperature and lower homogenization intensity. The A/M-BW pseudo-bilayer film has promising potential for application in food packaging which requires higher water vapor resistance.
本研究旨在通过调整干燥温度和均质条件，开发具有高表面疏水性的琼脂/麦芽糊精-蜂蜡（A/M-BW）伪双层膜。衰减全反射傅里叶变换红外光谱法测定了薄膜上下表面的化学组成。X 射线衍射对膜基质的结晶行为进行了表征。扫描电子显微镜研究了 BW 的分布模式和相分离现象。原子力显微镜揭示了薄膜的表面粗糙度。在 8000rpm 下均质 1 分钟制备的伪双层膜（A/M-BW-8000-1）具有最高的拉伸强度（20.57MPa）、杨氏模量（640.60MPa）、接触角（92.9°）和最低的水蒸气透过率（2.18×10-3g m s Pa）。在较高的干燥温度和较低的均质强度下，获得了具有优异表面疏水性和机械性能的 A/M-BW 伪双层膜。A/M-BW 伪双层膜具有在需要更高水蒸气阻隔性的食品包装中应用的巨大潜力。
