Prediction of CFD Numerical Simulation and Personalized 3D Printing Performance of Dendrobium officinale Composite Gel
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铁皮石斛粉富含多糖,具有特殊流变学特性,可用于开发3D打印食品材料.本文探讨铁皮石斛粉对淀粉基凝胶3D打印适应性的影响.通过流变学、质构学、扫描电子显微镜、X-射线衍射(XRD)、傅里叶红外光谱(FT-IR)等检测手段,结合计算流体动力学(CFD)模拟,分析铁皮石斛粉对淀粉基凝胶3D打印材料结构及打印特性的影响.结果表明,添加石斛粉对淀粉基凝胶的微观结构、流变及质构特性有显著的影响.随着石斛添加量由0 g(SG)增到1.00g(SG-1.00D),淀粉基凝胶的硬度由(59.81±1.39)g 增到(105.67±2.05)g,黏附性由(43.40±2.07)g·s 增到(78.59±0.23)g.s.石斛添加量为 0.15 g 可以优化凝胶体系的网络结构.添加石斛可引起FT-IR特征峰的迁移,增强17°附近XRD衍射特征标记峰的强度,说明生成了更强的氢键,然而未生成新的物质.SG-0.15D凝胶体系的打印速度可达6.13×10-2 1/s,打印效果最优.研究结果为石斛在3D打印食品材料中的应用提供了参考,为实际生产石斛3D打印材料提供了技术支持.
Dendrobium officinale powder is rich in polysaccharies and has special rheological properties,which can be used to develop starch-based 3D printing food materials.In this study,the effect of Dendrobium officinale powder on the adaptability of starch-based 3D printing gel(SG)was investigated.The structure and characteristics of starch-based gel 3D printing materials were analyzed by rheology,texture,scanning electron microscopy(SEM),x-ray diffraction,and fourier transform infrared spectroscopy(FT-IR)combined with Computational Fluid Dynamics(CFD)simulation.The re-sults showed that the addition of Dendrobium officinale powder had a significant effect on the microstructure,rheological and textural properties of starch-based gels.With the addition of Dendrobium officinale from 0g(SG)to 1.00 g(SG-1.00D),the hardness of starch-based gel increased from(59.81±1.39)g to(105.67±2.05)g,and the adhesion in-creased from(43.40±2.07)g·s to(78.59±0.23)g·s.It was found that addition of 0.15 g Dendrobium officinale powder can optimize the network structure of the gel system.The addition of Dendrobium can cause the migration of FT-IR characteristic peaks,and enhance the intensity of XRD diffraction characteristic marker peaks near 17°,indicating that stronger hydrogen bonds are generated,but no new substances are formed.The printing speed of the SG-0.15D could reach 6.13x10-2 1/s with best 3D printing adaptability.This research provides a theoretical basis and direction for the de-velopment of using Dendrobium officinale powder in 3D food printing materials,and providestechnical reference and sup-port for the actual production of Dendrobium officinale 3D printing materials.
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