Next Article in Journal
Microfluidic Spun Alginate Hydrogel Microfibers and Their Application in Tissue Engineering
Next Article in Special Issue
Emergence of Wrinkles during the Curing of Coatings
Previous Article in Journal / Special Issue
Process Variable Optimization in the Manufacture of Resorcinol–Formaldehyde Gel Materials
Article Menu
Issue 2 (June) cover image

Export Article

Open AccessArticle

Temperature Dependence of Electrophoretic Mobility and Hydrodynamic Radius of Microgels of Poly(N-isopropylacrylamide)

1
Department of Chemistry, Graduate School of Science, Kyushu University, Fukuoka 819-0395, Japan
2
Division of Molecular Science, Faculty of Science and Technology, Gunma University, Kiryu 376-8515, Japan
*
Author to whom correspondence should be addressed.
Received: 7 March 2018 / Revised: 16 April 2018 / Accepted: 19 April 2018 / Published: 20 April 2018
Full-Text   |   PDF [1086 KB, uploaded 20 April 2018]   |  

Abstract

Electrostatic interactions in charged microgels, which are dominated by the microgel net charge, play a crucial role in colloidal stabilization and loading of small, charged molecules. In this study, the temperature dependences of electrophoretic mobility μ and hydrodynamic radius Rh were measured for a slightly ionized poly(N-isopropylacrylamide) (PNIPA) microgel in a dilute suspension. A decrease in Rh was observed in the temperature range between 30 °C and 35 °C, corresponding to the lower critical solution temperature of PNIPA, and an increase in |μ| was observed in a higher temperature range between 34 °C and 37 °C. The analysis based on electrophoresis theory for spherical polyelectrolytes indicated that the net charge of the microgel decreased as the microgel was deswollen. View Full-Text
Keywords: microgel; electrophoresis; light scattering microgel; electrophoresis; light scattering
Figures

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Maki, Y.; Sugawara, K.; Nagai, D. Temperature Dependence of Electrophoretic Mobility and Hydrodynamic Radius of Microgels of Poly(N-isopropylacrylamide). Gels 2018, 4, 37.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Gels EISSN 2310-2861 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top