Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Rheology and Dynamics of a Solvent Segregation Driven Gel (SeedGel)

Published

Author(s)

Yuyin Xi, Ryan Murphy, Qingteng Zhang, Aurora Zemborain, Suresh Narayanan, Junsu Chae, Siyoung Choi, Andrei Fluerasu, Lutz Wiegart, Yun Liu

Abstract

Bicontinuous structures promise applications in a broad range of research fields, such as energy storage, membrane science, and biomaterials. Kinetically arrested spinodal decomposition is found responsible for stabilizing such structures in different types of materials. Recently, a newly developed solvent segregation driven gel (SeedGel) is demonstrated to realize bicontinuous channels in a thermally reversible and greatly tunable way. Here, the mechanical and dynamic properties of one model SeedGel system prepared with charged silica particles dispersed in water/ 2,6-lutidine are characterized with temperature-dependent rheology, small-angle neutron scattering, and X-ray photon correlation spectroscopy. The storage modulus shows good thermo-reproducibility, and an intermediate temperature range (around 30 ˚C) is identified to achieve the largest storage modulus. Small-angle neutron scattering (SANS) measurements are conducted at different temperatures and the macroscopic solvent phase separation is found to coincide with the gelation transition. The dynamics probed by X-ray Photon Correlation Spectroscopy (XPCS) are consistent with the temperature dependence of the storage modulus. The localization of nanoparticles is strongly correlated to the arrested dynamics of the domains. A slow, hyper-diffusive motion is observed in SeedGel at about 30 ˚C.
Citation
Soft Matter
Volume
19
Issue
2

Keywords

XPCS, Colloidal Gel, Rheology, Dynamics

Citation

Xi, Y. , Murphy, R. , Zhang, Q. , Zemborain, A. , Narayanan, S. , Chae, J. , Choi, S. , Fluerasu, A. , Wiegart, L. and Liu, Y. (2023), Rheology and Dynamics of a Solvent Segregation Driven Gel (SeedGel), Soft Matter, [online], https://dx.doi.org/10.1039/D2SM01129H (Accessed June 14, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created January 4, 2023, Updated September 26, 2023