School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, 255049, Shandong, PR China.
School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, 255049, Shandong, PR China.
Int J Biol Macromol. 2023 Dec 31;253(Pt 4):127037. doi: 10.1016/j.ijbiomac.2023.127037. Epub 2023 Sep 22.
This research was aimed at developing a novel pH-responsive smart film made of chitosan, zein and red radish anthocyanin (RRA). The morphology, interaction, crystallization, thermal stability, physiochemical properties and pH sensitivity of films were analyzed. The smart film was applied to monitor the freshness of mushroom (Agaricus bisporus). The results of morphology (SEM) and spectrum (FT-IR and XRD) indicated that the incorporation of RRA could enhance the interaction between polymer matrix. The addition of RRA had no significant effect on the thermal stability of films. The chitosan/zein/red radish anthocyanin (C/Z/R) films exhibited higher tensile strength, Young's modulus, hydrophobicity, antioxidant activity and lower elongation at break. The C/Z/R films had stronger water vapor and gas barrier capacity. The C/Z/R films showed a pH-sensitive color variation from red (pH 2) to green (pH 12) and good reversibility under alkaline and acidic environment. The prepared smart film could be successfully used for the quality monitoring of mushroom.
本研究旨在开发一种由壳聚糖、玉米醇溶蛋白和红心萝卜花青苷（RRA）制成的新型 pH 响应智能薄膜。分析了薄膜的形态、相互作用、结晶、热稳定性、物理化学性质和 pH 敏感性。该智能薄膜应用于监测蘑菇（双孢蘑菇）的新鲜度。形态（SEM）和光谱（FT-IR 和 XRD）的结果表明，RRA 的掺入可以增强聚合物基质之间的相互作用。添加 RRA 对薄膜的热稳定性没有显著影响。壳聚糖/玉米醇溶蛋白/红心萝卜花青苷（C/Z/R）薄膜表现出更高的拉伸强度、杨氏模量、疏水性、抗氧化活性和更低的断裂伸长率。C/Z/R 薄膜具有更强的水蒸气和气体阻隔能力。C/Z/R 薄膜在碱性和酸性环境下具有 pH 敏感的颜色变化，从红色（pH 2）变为绿色（pH 12），且具有良好的可逆性。所制备的智能薄膜可成功用于蘑菇的质量监测。
