Influences of monomer and oligomer structures on their adsorption on metal oxide surfaces

Chen, Mao; Elliott, Peter T.; Glass, J. Edward

doi:10.1016/s0927-7757(01)00559-3

Cited by 6 publications

(17 citation statements)

References 32 publications

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“…The difficulties associated with synthesis in aqueous systems are 60 well known. Many research groups have focussed on comb structured polymers to aid nanoparticle stabilisation in water as opposed to surfactants or linear structured polymers 13,15,26,29,30,32,33,37 . The stabilisation efficacy of surfactants and linear polymers is limited in water.…”

Section: Introductionmentioning

confidence: 99%

“…This makes stabiliser displacement from the particle surface more likely as steric layer stresses manifest themselves as stabilised particles interact 40 . Not surprisingly 75 therefore, it has been shown that the bonding strength of the adsorption units on the stabiliser is critically important 13,35,41 . In dilute systems, electrostatic repulsive forces offer a significant contribution to overall system stability, reducing steric layer stresses.…”

Section: Introductionmentioning

confidence: 99%

“…The issue of weaker adsorption can be overcome through use of multiple adsorption groups. Chen et al have demonstrated that 10 stabilisers possessing multiple terminal bonding groups are more successful at adhering via physisorption to the particle surface, and that stabilisers containing a single terminal bonding group weakly adsorb 13 . Increasing the adsorption strength of the stabiliser helps to mitigate stabiliser displacement as a result of 15 stresses that develop in the steric layer 42 .…”

Section: Introductionmentioning

confidence: 99%

“…The problems inherent with both surfactants and linear polymers can be overcome through use of comb polymers. It has been found that copolymers are more effective in many instances at providing stabilisation than linear polymer analogues 13,26 . This is 30 because the structure of a comb polymer allows strong surface adsorption, due to the presence of numerous adsorption groups along the backbone.…”

Section: Introductionmentioning

confidence: 99%

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Concentrated synthesis of metal nanoparticles in water

et al. 2014

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The synthesis of a range of metal nanoparticles (Ag, Au, Pd, Pt) in water through reduction from the acid 10 soluble salt at abnormally high concentrations (>1 mol/L) is demonstrated using a comb polymer of methoxypoly(ethylene glycol) acrylate and maleic anhydride (PEG-MA) as the particle stabiliser during particle formation. The results show that at high concentrations in water, the general growth mechanism in these systems is through aggregation of nuclei of an approximate diameter of 0.6 nm. Aggregation resulted in formation of single crystals up to a particle diameter of approximately 5 nm but thereafter, 15 further aggregation resulted in polygonal twinned particles. Continued aggregation caused agglomerate particles to be formed at larger sizes (>30 nm). Stabiliser adsorption was found to be critical to size control whereby the aggregation process was interrupted, preventing further growth. A case of the synthesis of Ag nanoparticles with a mean size of 8nm at concentrations of up to 2.5 mol/L is elaborated.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Concentrated synthesis of metal nanoparticles in water

et al. 2014

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“…The quality of pigment distribution also depends on various characteristics of latex binders. On the resin side, they include the latex particle size4 and morphology,5 monomer composition,6 functionality,7 nature and quantity of emulsifiers,8 and polymerization procedure 9. On the pigment side, it also depends on the surface properties of the pigments10 and the type of dispersant 11…”

Section: Introductionmentioning

confidence: 99%

Latex dispersability index

Khorassani¹,

Afshar‐Taromi²,

Pourmahdian³

2010

J of Applied Polymer Sci

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The pigment loading capacity (PLC) of dispersion binders is an important factor in the formulation of a latex paint. However, there has been no reliable method for the quantitative evaluation of this property; this has led to difficulty in comparing latex binders in this regard. In this article, a new parameter, the latex dispersability index (LDI), is proposed as a quantitative measure of PLC of latex binders. In this test method, the capability of latex to disperse pigments (or extenders) is quantified on the basis of the idea of the minimum viscosity method for dispersants. The face-centered cube experimental design was used to synthesize 26 binders. On the basis of this design, the synthesized latexes had a maximum diversity of properties, especially with regard to PLC. The binders were formulated with three mineral powders (i.e., TiO 2 , CaCO 3 , and talc). The curves of viscosity versus mass of the resin for all of the samples were prepared. The general trend of the curves was universal and only depended on the nature of the powders. The geometry of the curves and PLC had quantitative correlations. To make a quantitative correlation between the curves and PLC, LDI was defined as a function of the area under the curve, the height of the curve, and the length of the end point. Four ranges of LDI were assigned to the conventional quantitative phrases for PLC. The usefulness of this parameter was then verified by some well-known commercial binders with different PLCs. The results were in a good agreement with the expected behaviors.

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