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中国精品科技期刊2020
孙悦,李韦卓,刘玥彤,等. 蜡质复合涂层抑制黏性流体食品残留的研究[J]. 食品工业科技,xxxx,x(x):1−8. doi: 10.13386/j.issn1002-0306.2024080356.
引用本文: 孙悦,李韦卓,刘玥彤,等. 蜡质复合涂层抑制黏性流体食品残留的研究[J]. 食品工业科技,xxxx,x(x):1−8. doi: 10.13386/j.issn1002-0306.2024080356.
SUN Yue, LI Weizhuo, LIU Yuetong, et al. Application of Complex Wax Coating in Inhibiting Residual Amount of Viscous Fluid Foods[J]. Science and Technology of Food Industry, xxxx, x(x): 1−8. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2024080356.
Citation: SUN Yue, LI Weizhuo, LIU Yuetong, et al. Application of Complex Wax Coating in Inhibiting Residual Amount of Viscous Fluid Foods[J]. Science and Technology of Food Industry, xxxx, x(x): 1−8. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2024080356.

蜡质复合涂层抑制黏性流体食品残留的研究

Application of Complex Wax Coating in Inhibiting Residual Amount of Viscous Fluid Foods

  • 摘要: 为了有效减少黏性流体食品在食用后的残留量,本研究将棕榈蜡、小烛树蜡和疏水性纳米二氧化硅分散在无水乙醇中,喷涂到常用食品包装材料表面,经烘干后构建了稳固的低表面能蜡质复合涂层。采用扫描电镜、傅里叶红外变换光谱分析蜡质复合涂层的微观形貌与组成成分。以酸奶为典型的黏性流体食品,分析酸奶在蜡质复合涂层上接触角和滚动角的变化规律,探索蜡质涂层的润湿性、耐用性和普适性。由扫描电镜图像可知,蜡质复合涂层表面形成了更为复杂的粗糙结构,更有利于酸奶的滚动。而红外光谱图则证实了蜡质复合涂层在形成过程中,依赖于棕榈蜡与小烛树蜡的物理相变,而没有生成其他化学物质。酸奶在蜡质复合涂层上的接触角为(142.46±1.29)°,滚动角为(7.80±0.83)°。蜡质复合涂层经过40次摩擦试验后,酸奶的接触角仍然保持在(135.08±1.94)°,滚动角保持在(14.64±0.52)°。蜡质复合涂层在pH为4的乳酸溶液中浸泡24 h后,对酸奶的滚动角保持在(7.29±0.50)°,展现出良好的自清洁性能。此外,根据酸奶在原始包装上残留量随贮藏时间变化的零级反应动力学方程的速率常数(1.02/day),以及在蜡质复合涂层上的速率常数(0.27/day),可知蜡质复合涂层有效减缓了酸奶在贮藏过程中的残留量。将蜡质复合涂层应用范围扩大至牛奶、咖啡、番茄酱等常见黏性流体食品中,发现这些常见黏性流体食品的残留量均低于1%,表明蜡质复合涂层具有良好的减黏降损特征。因此,本研究制备的蜡质复合涂层具有良好的润湿性、耐磨性、pH适应性和普适性,可为解决黏性流体食品在包装材料上残留量过高的问题提供理论支撑。

     

    Abstract: For effectively reducing the residual amount of the viscous fluid foods after consumption, the palm wax, candelilla wax and hydrophobic nano-silica were adequately dispersed into absolute ethyl alcohol to form the suspension solution. Afterwards, the suspension was sprayed onto the surface of the common food package materials, which was dried to construct a robust complex wax coating with low surface energy. The scanning electron microscope and Fourier transform infrared spectroscopy were used to analyze the microstructure and components of the complex wax coatings. The yogurt was chosen as typical viscous fluid food to be dropped onto the complex wax coating, which was used to test the yogurt contact angle and rolling angle for exploring the wettability, robust and suitable of the complex wax coating. The typical coarse microstructure was formed on the complex wax coating based on the scanning electron microscope images. The yogurt droplet on the complex wax coating could be easily rolled. Furthermore, the complex wax coatings were fabricated from physical phase transition rather than new chemicals according to the Fourier transform infrared spectroscopy (FTIR). It was shown that the contact angle of yogurt on the wax complex coatings was (142.46±1.29)°, while the rolling angle was (7.80±0.83)°. The abrasion resistance, and pH range of the complex wax coating was further studied. After 40 times friction, the contact angle and the rolling angle of the yogurt on the wax complex coatings were still (135.08±1.94)° and (14.64±0.52)°, respectively. When the complex wax coating onto the substrate was immersed into the lactic acid solutions with pH4 for 24 h, the yogurt rolling angle still maintained (7.29±0.50)°, showing self-cleaning ability. Besides, the rate constant of zero-order reaction kinetics equation of the yogurt residual amount on the original package was 1.02/day, while the rate constant of the yogurt residual amount on the complex wax coating was 0.27/day. It effectively alleviated the yogurt residual amount during storage using the complex wax coating. The complex wax coatings could be further applied in common viscous fluid foods such as milk, coffee, and tomato sauce with residual amount less than 1%, showing great viscosity reduction and loss mitigation. Thus, the complex wax coatings prepared in this study were performed satisfying wettability, anti-abrasion, wide pH suitable range and suitable. It would be provided theoretical basis for reducing high residual amount of the viscous fluid foods on the package surface.

     

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