Colloidal dynamics and elasticity of dense wax particle suspensions over a wide range of volume fractions when tuning the softness by temperature

被引：4

作者：

Yoon, Jiwon ^{[1
]}

Scheffold, Frank ^{[2
]}

Ahn, Kyung Hyun ^{[1
]}

机构：

[1] Seoul Natl Univ, Sch Chem & Biol Engn, 599 Kwanak Ro Kwanak Gu, Seoul, South Korea

[2] Univ Fribourg, Dept Phys, Chemin Muse 3, CH-1700 Fribourg, Switzerland

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2019年 / 576卷

基金：

新加坡国家研究基金会; 瑞士国家科学基金会;

关键词：

Wax; Colloids; Elasticity index; Concentrated suspension; Concentrated emulsion; Surface softness; LIGHT-SCATTERING; MICRORHEOLOGY; RHEOLOGY; HARD;

D O I：

10.1016/j.colsurfa.2019.04.030

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report on the colloidal dynamics and rheology of liquid droplet emulsions and solid particle suspensions over a wide range of volume fractions. Diffusing wave spectroscopy and rheometry were utilized to study the micro/macroscale properties of 1-eicosene wax particles dispersed in water. By changing the temperature, the wax droplets change their properties from soft to hard or vice versa, which, depending on the density, may affect the system properties in a different way. Our measurements in the high volume fraction regime focus on the elasticity index and the plateau storage modulus, G(p)'. The results show a more pronounced increase of the modulus for the wax particle suspensions around the random close packing volume fraction compared to the emulsion.

引用

页码：1 / 8

页数：8