Stable emulsions of droplets in a solid edible organogel matrix.
Stable emulsions of droplets in a solid edible organogel matrix.
复制标题
DOI：
10.1039/c8sm00169c
复制
发表时间：
2018-03-14
期刊：
影响因子：
3.4
通讯作者：
Clegg PS
中科院分区：
文献类型：
--
作者：
Matheson A ;Dalkas G ;Mears R ;Euston SR ;Clegg PS
谷甾醇-谷维素有机凝胶在水附近不稳定，但在甘油存在下显示稳定。谷甾醇和谷维素在一系列有机溶剂中自组装形成非常坚固的凝胶。然而，由于谷甾醇水合物晶体的形成，这些凝胶在水的存在下是不稳定的，阻止了水滴在整个凝胶基质中的分散。我们证明，通过使用甘油作为极性相，而不是水，液滴可以分散在整个油相，而不破坏凝胶的自组装。随着向甘油中加入的水体积的增加，G ′值降低。这可以与水活性的下降以及与水相比在甘油存在下原纤维的稳定性相关，如通过分子动力学模拟所阐明的。我们探讨如何改变极性液滴的总体积，并改变这些液滴的水含量改变15%w/w甾醇凝胶的强度。我们发现，即使在整个基质中分散有约30%w/w的甘油，凝胶也表现出约1 × 107 Pa的G ′值。在较高的甘油负载下，可以形成复杂的多重乳液形态。
Sitosterol–oryzanol organogels are unstable near water, but are shown to be stable in the presence of glycerol. Sitosterol and oryzanol self-assemble to form very firm gels in a range of organic solvents. However, due to the formation of sitosterol hydrate crystals, these gels are unstable in the presence of water, prohibiting the dispersal of water droplets throughout the gel matrix. We demonstrate that by using glycerol as the polar phase rather than water, droplets may be dispersed throughout the oil phase without disrupting the self-assembly of the gel. As increasing volumes of water are added to the glycerol, the G′ values decrease. This can be correlated to both a drop in water activity, and also the stability of the fibrils in the presence of glycerol compared to water, as elucidated by molecular dynamics simulations. We explore how changing the total volume of polar droplets, and changing the water content of these droplets alters the strength of 15% w/w sterol gels. We find that gels exhibit G′ values of ∼1 × 107 Pa even with ∼30% w/w glycerol dispersed throughout the matrix. At higher glycerol loadings, complex multiple emulsion morphologies can form.
登录
查看更多内容
影响因子：
2.2
作者：
Dickinson, E;Chen, JS
通讯作者：
Chen, JS
影响因子：
2.4
作者：
Mason, TG;Lacasse, MD;Weitz, DA
通讯作者：
Weitz, DA
影响因子：
5.5
作者：
Roe, Daniel R.;Cheatham, Thomas E., III
通讯作者：
Cheatham, Thomas E., III
影响因子：
3
作者：
Morris, Garrett M.;Huey, Ruth;Lindstrom, William;Sanner, Michel F.;Belew, Richard K.;Goodsell, David S.;Olson, Arthur J.
通讯作者：
Olson, Arthur J.
影响因子：
6.1
作者：
Sawalha, Hassan;den Adel, Ruud;van der Linden, Erik
通讯作者：
van der Linden, Erik