铁皮石斛复合凝胶CFD数值模拟与个性化3D打印性能预测

Prediction of CFD Numerical Simulation and Personalized 3D Printing Performance of Dendrobium officinale Composite Gel

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1.00 g(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6.13×10-21/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 results 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 0 g(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 increased 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 6.13×10-21/s with best 3D printing adaptability.This research provides a theoretical basis and direction for the development of using Dendrobium officinale powder in 3D food printing materials,and providestechnical reference and support for the actual production of Dendrobium officinale 3D printing materials.