Ko, Young Gun Lee, Hyun Jeong Chun, Yong Jin Choi, Ung Su Yoo, Ki Pung 2024-01-20T13:03:02Z 2024-01-20T13:03:02Z 2021-09-01 2013-02 1944-8244 https://pubs.kist.re.kr/handle/201004/128423 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. English American Chemical Society Positive and Negative Electrorheological Response of Alginate Salts Dispersed Suspensions under Electric Field Article 10.1021/am302891w 1 ACS Applied Materials & Interfaces, v.5, no.3, pp.1122 - 1130 ACS Applied Materials & Interfaces 5 3 1122 1130 N scie scopus 000315079700087 2-s2.0-84873695732 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article SHEAR BEHAVIOR VISCOSITY EQUATION GELATION STARCH FLUIDS ACID GELS ION alginates electric field electrogelation electro-response negative electrorheology