Electric charge on small silicone oil droplets dispersed in ionic surfactant solutions

Gu, Yongan; Li, Dongqing

doi:10.1016/s0927-7757(98)00283-0

Cited by 32 publications

(28 citation statements)

References 32 publications

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“…Also, this charge effect on the surface tension can cause the instability of charged droplet24 and Coulombic fission when droplets evaporated2526. Second, the charge can also affect the chemical stability of emulsions due to interactions with charged molecules such as ionic surfactants2728 and can influence the combination and localization of charged bio-molecules such as proteins and DNAs293031.…”

Section: Discussionmentioning

confidence: 99%

Spontaneous electrical charging of droplets by conventional pipetting

Choi

Lee

et al. 2013

Sci Rep

176

141

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We report that a droplet dispensed from a micropipette almost always has a considerable electrical charge of a magnitude dependent on the constituents of the droplet, on atmospheric humidity and on the coating material of pipette tip. We show that this natural electrification of a droplet originates from the charge separation between a droplet and pipette tip surface by contact with water due to the ionization of surface chemical groups. Charge on a droplet can make it difficult to detach the droplet from the pipette tip, can decrease its surface tension, can affect the chemical characteristics of solutions due to interactions with charged molecules, and can influence the combination and localization of charged bio-molecules; in all cases, the charge may affect results of experiments in which any of these factors is important. Thus, these findings reveal experimental parameters that should be controlled in experiments that use micropipettes.

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Section: Discussionmentioning

confidence: 99%

Spontaneous electrical charging of droplets by conventional pipetting

Choi

Lee

et al. 2013

Sci Rep

176

141

View full text Add to dashboard Cite

show abstract

“…These liquids are the same as those used for measuring the ζ -potential of small silicone oil droplets (15)(16)(17). They are the pure DIUF water (Fisher Scientific, Canada), the aqueous phases with varying pH values, the electrolyte solutions containing either NaCl or AlCl 3 , and the ionic surfactant solutions containing either CTAB or SDS.…”

Section: Streaming Potential Measurementsmentioning

confidence: 99%

“…They are the pure DIUF water (Fisher Scientific, Canada), the aqueous phases with varying pH values, the electrolyte solutions containing either NaCl or AlCl 3 , and the ionic surfactant solutions containing either CTAB or SDS. The last three aqueous solutions are prepared from the pure DIUF water and the procedure for their preparations was described previously (15)(16)(17). In the streaming potential measurements, the viscosity µ, the relative dielectric constant ε r , and the bulk electrical conductivity λ b are the important liquid properties required in Eq.…”

Section: Streaming Potential Measurementsmentioning

confidence: 99%

The ζ-Potential of Glass Surface in Contact with Aqueous Solutions

2000

Journal of Colloid and Interface Science

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172

114

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“…In comparison among the studied formulation, in the absence of NaCl, the magnitude of the zeta potential of methyl palmitate particles was extremely high, due to the ester functional group in methyl palmitate being hydrolyzed into carboxyl and hydroxyl groups, as well as the adsorption of the anionic extended surfactant 7,8,34,35 . The zeta potential of the methyl palmitate particles became less negative with increasing NaCl concentrations, due to the compression of the double layer or reduction of Debye length next to the surface by the coadsorption of sodium ions from the added NaCl 36,37 .…”

Section: Particle Size Distributionmentioning

confidence: 99%