Copper Phthalocyanine–Mica Interactions in Nonaqueous Media

Jenkins, Paul J.; Ralston, John; Thomas, John C.; Nicholls, Stephen L.; Staples, Philip E.

doi:10.1006/jcis.1998.5962

Cited by 6 publications

(5 citation statements)

References 19 publications

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“…The specific energy of a hydrogen bonding interaction (ΔG H-bonding ) is generally around 10 kJ/mol, however, the total cumulative energy of the polymer adsorption is considerable and can be significant in binding molecules to the surface [63]. The energy for hydrophobic interaction (ΔG c-c + ΔG c-s ) is generally 3-4 kJ/mol for each chain segment [94].…”

Section: Adsorption Free Energymentioning

confidence: 99%

A review of polymeric dispersant stabilisation of titania pigment

Farrokhpay

2009

Advances in Colloid and Interface Science

282

149

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Section: Adsorption Free Energymentioning

confidence: 99%

A review of polymeric dispersant stabilisation of titania pigment

Farrokhpay

2009

Advances in Colloid and Interface Science

282

149

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“…6 Zirconyl fatty acid salts have been used far less frequently, and normally only in one form, zirconyl 2-ethyl hexanoate (Zr(Oct) 2 ). 46,62,65,[73][74][75][76]…”

Section: Aggregation Of Surfactantsmentioning

confidence: 99%

Controlling colloid charge in nonpolar liquids with surfactants

Smith

Eastoe

2013

Phys. Chem. Chem. Phys.

100

146

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The formation of ions in nonpolar solvents (with relative permittivity ε r of approximately 2) is more difficult than in polar liquids; however, these charged species play an important role in many applications, such as electrophoretic displays. The low permittivities (ε r) of these solvents mean that charges have to be separated by large distances to be stable (approximately 28 nm or 40 times that in water). The inverse micelles formed by surfactants in these solvents provide an environment to stabilize ions and charges. Common surfactants used are sodium dioctylsulfosuccinate (Aerosol OT or AOT), polyisobutylene succinimide, sorbitan oleate, and zirconyl 2-ethyl hexanoate. The behavior of charged inverse micelles has been studied on both the bulk and on the microscopic scale and can be used to determine the motion of the micelles, their structure, and the nature of the electrostatic double layer. Colloidal particles are only weakly charged in the absence of surfactant, but in the presence of surfactants, many types, including polymers, metal oxides, carbon blacks, and pigments, have been observed to become positively or negatively charged. Several mechanisms have been proposed as the origin of surface charge, including acid-base reactions between the colloid and the inverse micelle, preferential adsorption of charged inverse micelles, or dissolution of surface species. While most studies vary only the concentration of surfactant, systematic variation of the particle surface chemistry or the surfactant structure have provided insight into the origin of charging in nonpolar liquids. By carefully varying system parameters and working to understand the interactions between surfactants and colloidal surfaces, further advances will be made leading to better understanding of the origin of charge and to the development of more effective surfactants.

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“…Both adhesion force and tensile strength were reduced by addition of flow control additives in the same manner. Jenkins et al [106] studied the interaction of copper phtalocyanine particles with a mica surface in an isoparaffinic hydrocarbon phase. These particles are widely used in the printing industry as cyan colour pigment.…”

Section: Printingmentioning

confidence: 99%