Positive and negative electrorheological response of alginate salts dispersed suspensions under electric field

Title
Positive and negative electrorheological response of alginate salts dispersed suspensions under electric field
Authors
고영건이현정전영진최웅수유기풍
Keywords
Alginates; Electric field; Electrogelation; Electro-response; Negative electrorheology
Issue Date
2013-02
Publisher
ACS Applied Materials & Interfaces
Citation
VOL 5, NO 3, 1122-1130
Abstract
Electrorheological (ER) effects of alginic acid and alginate salts (Na+ alginate, NH4 + alginate, and Ca2+ alginate) dispersed suspensions were investigated under DC electric fields. A noteworthy result is that the Ca2+ alginate dispersed suspension showed negative electrorheological effects under electric fields while the other suspensions exhibited positive electrorheological effects. It is the first time that the negative ER effect is obtained with the biomacromolecule. Interestingly, at the DC electric fields, the electromigration of particles to two electrodes was observed in the negative ER fluid, while the particles-bridges formed between two electrodes in the case of the positive ER fluid. In conclusion, the specific salt type of biomacromolecules could be suitable ER particles for negative ER suspension. We believe that our study can present a new way for the development of the biocompatible and eco-friendly negative ER fluids.
URI
http://pubs.kist.re.kr/handle/201004/44536
ISSN
19448244
Appears in Collections:
KIST Publication > Article
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