Adsorption properties of silica sols modified with thiol groups

Hernández, García; Rodrı́guez, Rogelio

doi:10.1016/s0022-3093(99)00073-3

Cited by 35 publications

(15 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the original silica particles, strong and broad peaks at 3470 cm 21 , reflecting the intramolecular hydrogen-bonded silanol hydroxyl groups and near 1100 cm 21 , which may attribute to the SiÀ ÀO vibration, are assigned, respectively. 16 As for silica-HDI, C¼ ¼O stretching peak at 1632 cm 21 and an amide NÀ ÀH vibration peak at 1570 cm 21 are observed, which corresponds to the urethane bond. Besides, a peak, NÀ ÀH stretching, is assigned at 3347 cm 2117 and a new peak attributable to isocyanate groups, is found at 2290 cm 21 .…”

Section: Resultsmentioning

confidence: 99%

Effect of isocyanate‐modified fumed silica on the properties of poly(butylene succinate) nanocomposites

Lim

Hong

Kim

et al. 2007

J of Applied Polymer Sci

View full text Add to dashboard Cite

Using the grafting method on a silica surface with PBS molecules, we prepared novel poly(butylene succinate) (PBS)/silica nanocomposites to enhance dispersibility and interfacial adhesion between silica particles and the PBS matrix, and also investigated the effects of silica-g-PBS on the PBS matrix using differential scanning calorimetry, thermogravimetric analysis, transmission electron microscopy, a tensile testing machine, and rheometry. The thermal stability, mechanical properties, and rheological properties of PBS nanocomposites containing silica-g-PBS was remarkably improved because of the surface characteristics of the silica grafted with PBS molecules, which provided good compatibility and dispersion.

show abstract

Section: Resultsmentioning

confidence: 99%

Effect of isocyanate‐modified fumed silica on the properties of poly(butylene succinate) nanocomposites

Lim

Hong

Kim

et al. 2007

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…These amino surface groups can be used directly as anchoring points or as intermediate for functional group interconversion [58]. Mercapto [59][60][61][62] and epoxysilanes [63,64] are also common coupling agents. Carboxylic acid, directly introduced with coupling agents bearing this functionality [65] or by chemical reactions on previously grafted amine groups [58], is also frequently used.…”

Section: Coupling Agentsmentioning

confidence: 99%

Organic Modification of Hydroxylated Nanoparticles: Silica, Sepiolite, and Polysaccharides

Tiemblo

García

Hoyos

et al. 2015

Handbook of Nanoparticles

View full text Add to dashboard Cite

The incorporation of organic compounds onto the surface of nanoparticles (NPs) differs from the same reactions carried out on macroscopic surfaces in that the former are characterized by surfaces energies much higher than the latter. Consequently, surface stabilization mechanisms of NPs are very active, and among them NP self-aggregation is the first and most important. In NP surface modification, the ability of the experimental conditions to destroy self-aggregation will determine the extent to which the NP surface is modified and so, the modified NP nature. A second consequence of the high-surface free energy is the NP surface avidity to interact chemically or physically with other compounds: NPs readily adsorb water, gases, vapors, or other higher molecular weight substances, and in the particular case of hydroxylated NP, chemical reactivity is both high and rich. This chapter will deal with the surface modification of silica, sepiolite, and polysaccharides. Experimental strategies, resulting organo-NPs, their structure and properties, and frequent uses and applications of them will be reviewed.

show abstract

“…The flocculation process was carried out at room temperature by adding small amounts of cadmium ions (0.1 ml of the stock solution) every 3 min, until the critical flocculation concentration (CFC) was reached and the system flocculates. This multiple injection process allows obtaining the minimum amount of flocculant required to flocculate the dispersion [15,17].…”

Section: Flocculation Proceduresmentioning

confidence: 99%

“…The use of nanoparticles has attracted considerable attention recently [14], being now very promising for the removal of heavy metals ions and metal purification processes [15]; the nanoparticles have enormous surface area, are inexpensive, commercially available, simple to use and are available with different chemical groups on the surface; additionally, they produce compact sludge easier to handle and requires low cost infrastructure [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Cadmium ions adsorption in simulated wastewater using structured alumina–silica nanoparticles

Pacheco

Tapia

Medina

et al. 2006

Journal of Non-Crystalline Solids

View full text Add to dashboard Cite

Adsorption properties of silica sols modified with thiol groups

Cited by 35 publications

References 21 publications

Effect of isocyanate‐modified fumed silica on the properties of poly(butylene succinate) nanocomposites

Effect of isocyanate‐modified fumed silica on the properties of poly(butylene succinate) nanocomposites

Organic Modification of Hydroxylated Nanoparticles: Silica, Sepiolite, and Polysaccharides

Cadmium ions adsorption in simulated wastewater using structured alumina–silica nanoparticles

Contact Info

Product

Resources

About