MOE Key Laboratory of Wooden Material Science and Application, Beijing Key Laboratory of Wood Science and Engineering, College of Material Science and Technology, Beijing Forestry University, Beijing, 100083, China.
Sci Rep. 2017 Mar 10;7:44289. doi: 10.1038/srep44289.
This study was to develop novel soy protein isolate-based films for packaging using halloysite nanotubes (HNTs), poly-vinyl alcohol (PVA), and 1,2,3-propanetriol-diglycidyl-ether (PTGE). The structural, crystallinity, opacity, micromorphology, and thermal stability of the resultant SPI/HNTs/PVA/PTGE film were analyzed by the Attenuated total reflectance-Fourier transformed infrared (ATR-FTIR) spectroscopy, X-ray diffraction (XRD), UV-Vis spectrophotometry, scanning electron microscopy (SEM), and thermo-gravimetric analysis (TGA). The SPI/HNTs/PVA/PTGE film illustrated that HNTs were uniformly dispersed in the SPI matrix and the thermal stability of the film was enhanced. Furthermore, the tensile strength (TS) of the SPI/HNTs/PVA/PTGE film was increased by 329.3% and the elongation at the break (EB) remained unchanged. The water absorption (WA) and the moisture content (MC) were decreased by 5.1% and 10.4%, respectively, compared to the unmodified film. The results highlighted the synergistic effects of SPI, HNTs, PVA, and PTGE on the mechanical properties, water resistance, and thermal stability of SPI films, which showed excellent strength and flexibility. In short, SPI films prepared from HNTs, PVA, and PTGE showed considerable potential as packaging materials.
本研究旨在开发新型大豆分离蛋白基包装膜，使用了埃洛石纳米管（HNTs）、聚乙烯醇（PVA）和 1,2,3-丙三醇二缩水甘油醚（PTGE）。通过衰减全反射傅里叶变换红外（ATR-FTIR）光谱、X 射线衍射（XRD）、紫外可见分光光度法、扫描电子显微镜（SEM）和热重分析（TGA）分析了所得 SPI/HNTs/PVA/PTGE 膜的结构、结晶度、不透明度、微观形貌和热稳定性。结果表明，HNTs 均匀分散在 SPI 基质中，且膜的热稳定性增强。此外，SPI/HNTs/PVA/PTGE 膜的拉伸强度（TS）提高了 329.3%，而断裂伸长率（EB）保持不变。与未改性膜相比，水吸收（WA）和水分含量（MC）分别降低了 5.1%和 10.4%。结果突出了 SPI、HNTs、PVA 和 PTGE 对 SPI 膜机械性能、耐水性和热稳定性的协同作用，表现出优异的强度和柔韧性。总之，由 HNTs、PVA 和 PTGE 制备的 SPI 膜作为包装材料具有相当大的潜力。
