相关实验视频

Updated: Jul 6, 2025

A Tripeptide-Stabilized Nanoemulsion of Oleic Acid

A Tripeptide-Stabilized Nanoemulsion of Oleic Acid

Published on: February 27, 2019

纳米乳液稳定对奥斯瓦尔德成熟

Yanlin Guo¹, Xinpeng Zhang¹, Xiaohan Wang¹

¹Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan, Shandong 250100, P. R. China.

Langmuir : the ACS journal of surfaces and colloids

|January 4, 2024

概括

稳定的纳米乳液在没有Ostwald成熟的情况下被制造出来,这是一个常见的滴滴生长问题. 这项研究强调了微粒缺失对纳米乳液稳定性和潜在的农药输送应用的重要性.

科学领域:

合体和表面化学
材料科学材料科学材料科学
物理化学物理化学

背景情况:

奥斯瓦德成熟导致油在水 (O/W) 纳米乳液中的滴滴生长,特别是在高度的表面活性剂中.
这种现象与水相中微粒的存在和油的水溶性有关.
在特定条件下,自发形成的纳米乳液容易受到奥斯瓦尔德成熟的作用.

研究的目的:

调查自发形成的O/W纳米乳液对奥斯瓦尔德成熟的稳定性.
阐明小在这些系统中Ostwald成熟的发生中的作用.
探索稳定纳米乳液作为水不溶性物质的纳米载体的潜力.

主要方法:

使用脂肪酒精聚氧烯聚氧乙烯 (APE) 自发形成O/W纳米乳液.
使用动态光散射来监测滴滴大小,以评估奥斯瓦尔德成熟.
用表面和界面张力测量来确定APE的分割系数和界面吸附.

主要成果:

自发形成的O/W纳米乳液表现出对奥斯瓦尔德成熟的稳定性.
在纳米乳液系统中添加微粒诱导了滴滴生长,证实了它们在奥斯瓦尔德成熟中的作用.
该研究分析了APE的相位分布和吸附行为,以了解菌形成.

结论:

缺少细胞对于防止奥斯瓦尔德成熟和实现稳定的纳米乳液至关重要.
自发形成的O/W纳米乳液,没有Ostwald成熟,是可行的农药纳米载体.
这项工作为制备稳定的纳米乳液提供了一种新方法,并加深对纳米乳液不稳定机制的理解.

更多相关视频

Self-Nanoemulsification of Healthy Oils to Enhance the Solubility of Lipophilic Drugs

Self-Nanoemulsification of Healthy Oils to Enhance the Solubility of Lipophilic Drugs

Published on: July 27, 2022

Facile Preparation of Internally Self-assembled Lipid Particles Stabilized by Carbon Nanotubes

Facile Preparation of Internally Self-assembled Lipid Particles Stabilized by Carbon Nanotubes

Published on: February 19, 2016

相关概念视频

Colloidal precipitates

Colloidal precipitates

The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...

Types of Enols and Enolates

Types of Enols and Enolates

Aldehydes and ketones form enols, although only about 1% of the enol is present at the equilibrium for simple monocarbonyl compounds. The enol form is undetectable for acetaldehyde, present as only 1.5 × 10−4 % of acetone, and present as only 1.2% of cyclohexanone. Two kinds of regioisomeric enols are possible for unsymmetrical ketones, and their net composition is 1% at equilibrium. This instability is due to the lower bond energy of C=C than the C=O group. The additional...