|
| Effect of emulsion droplet size and Quillaja saponin concentration on the fabrication of high internal phase emulsion gels and oleogels |
| |
| DOI： |
| KeyWord:Quillaja saponin emulsion droplet size high internal phase emulsion gels emulsion template oleogels |
| FundProject:国家自然科学基金资助项目（31801461）；河南工业大学高层次人才科研启动基金（2018BS083） |
|
| Hits: 1063 |
| Download times: 666 |
| Abstract: |
| The effects of the droplet size and biosurfactant(Quillaja saponin,QS) mass fraction on the rheological properties and microstructure of high internal phase emulsion gels (HIPE-gels) and oleogels produced with the HIPE-gels were studied using laser scattering technology, dynamic rheology and laser confocal microscopy. The results showed that both the HIPE-gels and oleogels were fabricated by a non-covalent physical crosslink among oil droplets, and exhibited a shear-thinning behavior. With the emulsion droplet size decreasing, the dispersed oils were packed more tightly, resulting in a stronger network structure with high viscoelasticity of the HIPE-gels and oleogels. When the QS mass fraction was less than or equal to the critical concentration of 1.5%, the electrostatic repulsion among the emulsion droplets played a dominated role in the viscoelasticity and strength of HIPE-gels. Subsequently, increasing QS mass fraction above 1.5%, the free QS molecules were attributed to the formation of a stronger gel strength of HIPE-gels. However, the gel strength of oleogels fabricated from emulsion templates stabilized solely by QS increased with the emulsion droplet size decreasing and the QS mass fraction increasing. |
| View full text View/Add Comment Download reader |
| Close |
|
|
|
