This work aimed to develop a novel strategy to modulate the distribution of beeswax in acid-modified starch films via tuning octenyl succinate starch (OSS) ratios and to elucidate their structure-property relationships. The apparent viscosity and storage modulus of the film-forming solution decreased with the increase of OSS ratio. Attenuated total reflectance-fourier transform infrared (ATR-FTIR) spectroscopy revealed that the hydrogen bond in the film-forming network was cleaved with the presence of OSS. Scanning electron microscope (SEM), atomic force microscope (AFM), and X-ray diffraction (XRD) demonstrated that OSS ratio had an obvious effect on the formation and distribution of beeswax crystal particles. Uniform distribution of beeswax effectively enhanced the hydrophobicity and water barrier properties of films and performed preferable elongation at break but at the expense of tensile strength and optical properties. The films with higher OSS ratio (>12 %) presented higher thermal stability. This study provides new information on the rational design of emulsified films to obtain desirable physicochemical properties by tuning the distribution of beeswax.

这项工作旨在开发一种新的策略，通过调整辛烯基琥珀酸淀粉 (OSS) 的比例来调节蜂蜡在酸改性淀粉膜中的分布，并阐明它们的结构-性质关系。成膜溶液的表观粘度和储能模量随着OSS比的增加而降低。衰减全反射-傅里叶变换红外 (ATR-FTIR) 光谱显示，在 OSS 的存在下，成膜网络中的氢键被裂解。扫描电子显微镜（SEM）、原子力显微镜（AFM）和X射线衍射（XRD）表明OSS比例对蜂蜡晶体颗粒的形成和分布有明显影响。蜂蜡的均匀分布有效地提高了薄膜的疏水性和水阻隔性能，并具有较好的断裂伸长率，但以牺牲拉伸强度和光学性能为代价。具有较高 OSS 比率 (>12%) 的薄膜表现出较高的热稳定性。本研究为合理设计乳化薄膜以通过调整蜂蜡的分布来获得理想的物理化学性质提供了新的信息。