食品工业科技2025，Vol.46Issue(7)：103-111,9.DOI:10.13386/j.issn1002-0306.2024040341
高速剪切法和微流控法制备海藻酸钠微球及流变和摩擦特性表征
Characterization of Rheological and Tribological Properties of Sodium Alginate Microspheres Prepared by High-speed Shear and Microfluidics
摘要
Abstract
Sodium alginate microspheres have a wide range of applications in the fields of biomedicine and food industry.However,until now there is a lack of systematic discussion on the rheological and tribological properties of sodium alginate microspheres.In this study,sodium alginate microspheres with different particle size distributions were prepared using high-speed shear and microfluidic methods respectively,and dispersed the microspheres obtained at three concentrations of no packing(0.5 wt％),semi packing(5 wt％),and close packing(20 wt％)respectively in water to obtain suspensions.Particle size,morphology,rheological properties(flow properties,viscoelastic properties,thixotropic properties),and tribological properties were compared.Results showed that the microspheres prepared by the high-speed shear method had a particle size of 127.7±55.0 μm,while the microspheres prepared by microfluidic method had a more regular shape with the particle size of 91.2±3.3 μm.The microspheres prepared by the high-speed shear method exhibited stronger shear thinning behavior.In the low concentration range(0.5 wt％～5 wt％),the microspheres prepared by microfluidic method showed obvious viscous characteristics,while the microspheres prepared by the high-speed shear method showed obvious elastic characteristics.The microspheres prepared by microfluidics exhibited stronger thixotropy and recovery ability,and their tribological coefficient was less affected by the concentration.Overall,the microspheres prepared by microfluidic method had more stable rheological and tribological properties.This study is significant for understanding the impact of concentration and particle size distribution of sodium alginate microspheres on their rheological and tribological properties,and worthwhile for developing microsphere products with controllable rheological and tribological properties.关键词
海藻酸钠微球/微流控/流变学/摩擦学/高速剪切法/流动特性/黏弹特性/触变特性Key words
sodium alginate microspheres/microfluidics/rheology/tribology/high-speed shear/flow properties/viscoelastic properties/thixotropic properties分类
轻工纺织引用本文复制引用
林嘉文,陈思谦,刘宇佳,朱杰,王凯..高速剪切法和微流控法制备海藻酸钠微球及流变和摩擦特性表征[J].食品工业科技,2025,46(7):103-111,9.基金项目
国家自然科学基金委员会青年科学基金项目(31801544) （31801544）
广东省基础与应用基础研究基金项目(2022A1515140072). （2022A1515140072）
