Synthesis of silica nanoparticles using oil-in-water emulsion and the porosity analysis

Kong, Linggen; Uedono, Akira; Smith, Suzanne V.; Yamashita, Yudai; Chironi, Ilkay

doi:10.1007/s10971-012-2859-7

Cited by 5 publications

(5 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Reactive Blue 21, a polar and organic dye was used to increase the electrostatic attraction of the dye molecules with a negative charge in the silica matrix [22]. Among the various available methods for the synthesis of coloured silica nanoparticles, w/o method was selected for easy control of the particles size, cost-effectiveness, thermodynamic and isotropic properties [14,23]. The particle size in this method is influenced by the nature of the surfactant molecules, the concentration of tetraethyl orthosilicate and ammonium, as well as, the molar ratio of water to the surfactant [18].…”

Section: Discussionmentioning

confidence: 99%

Designing an immunosensor for detection of Brucella abortus based on coloured silica nanoparticles

Shams

Zarif

2019

Artificial Cells, Nanomedicine, and Biotechnology

View full text Add to dashboard Cite

Brucellosis has always been a threat to the health and economics of societies. We report a new colorimetric immunoassay based on colored silica nanoparticles for detection of Brucella abortus. An immunosensor was designed based on blue-SiNPs and paramagnetic nanoparticles (PMNPs). The synthesized immunosensor was conjugated with a polyclonal antibody against B. abortus, which was activated by 1-Ethyl-3-(3-dimethylaminopropyl)-carbodiimide (EDC) and N-hydroxysuccinimide (NHS) to form detection and capture probes, respectively. After adding the conjugates to the bacterial suspension, sandwich structure of PMNPs B. abortus-blue-SiNPs was formed and then separated by a magnet. The blue dye was released from the silica structure and its absorbance was measured at 670 nm with a spectrophotometer. Under optimal conditions, results showed a wide dynamic range from 1.5 Â 10 3 to 1.5 Â 10 8 cfu mL À1 with a detection limit of 450 cfu mL À1. The specificity of the sensor was confirmed in comparison with 5 other bacteria. Also, during the 120-days period, the complex was stable. The results suggested that it can be used in real samples (R 2 ¼ .9865). This designed colorimetric immunoassay strategy can be used as an alternative, user-friendly and on-site tool for the rapid detection of Brucella spp. compared to other common methods with high sensitivity and specificity in a short time.

show abstract

Section: Discussionmentioning

confidence: 99%

Designing an immunosensor for detection of Brucella abortus based on coloured silica nanoparticles

Shams

Zarif

2019

Artificial Cells, Nanomedicine, and Biotechnology

View full text Add to dashboard Cite

show abstract

“…This facilitated the penetration of the paraffin wax at the interfacial film, allowing the capping of the SNPs [26]. The preparation of SNPs using this emulsion technique has been described elsewhere [27][28][29], where it was found that the morphology, particle size, and porosity of SNPs are affected by the emulsion type and the hydrolyzing conditions. Hydrophobic silica was prepared in the absence and presence of PWs (HSNP and HOSNP, respectively) in a methanol solvent.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, the use of CTAB as the cationic surfactant as an emulsifier during the synthesis of HOSNPs, using oil-in-water (EOSNP1) or oil-in-water-oil (EOSNP2) emulsions, facilitated the dispersion of the SOA and the VOS as the oil phase, in a continuous water phase. Chloroform was added to control the hydrophilicity and particle size of the SNPs [27]. EOSNP2 showed a larger particle size than the EOSNP1 because of the use of chloroform during its synthesis, as illustrated in Figure 2c,d.…”

Section: Characterization Of the Pws/silica Nanocapsulesmentioning

confidence: 99%

Coating Sand with New Hydrophobic and Superhydrophobic Silica/Paraffin Wax Nanocapsules for Desert Water Storage and Transportation

et al. 2019

View full text Add to dashboard Cite

Paraffin wax emulsions have gained immense attention as a cheap, environment-friendly, and aroma-free material for preparing superhydrophobic coatings. In this work, paraffin wax (PWs) capsules consisting of hydrophobic silica nanoparticles were used for coating desert sand. Different types of the hydrophobic silica nanoparticles, modified with new oleylamino- and oleylamide silane precursors, were prepared in the presence and absence of paraffin waxes. The particle sizes, surface charges, thermal stability, surface morphologies, and wetting characteristics of these nanoparticles were investigated. The combination of these superhydrophobic silica nanoparticles and desert sand, showed excellent water repellency; stable water droplets remained on the sand surface, without any wetting or permeation. Furthermore, the mixing of the superhydrophobic sand with untreated sand (mixing ratio 1:10 wt %), with a thickness of 2 cm, sustained a great water-holding capacity with a water column height of 35 cm. The good thermal stability of the PWs capsules containing hydrophobic silica nanoparticles, along with their good water-holding capacity, make them potential candidates for developing superhydrophobic sand for desert water storage and transportation.

show abstract

“…It is expected that the hydrophobic interaction or π–π interaction of the aromatic groups of asphaltene and the double bond of oleyl group between ASAS and AOS increases the formation of micelles during the hydrolysis of the silane precursors. Therefore, the alkaline hydrolysis of silane precursors can be carried out in methanol or in a hexane/water emulsion system [ 37 ]. The silane precursors (ASAS and AOS) and TEOS used as the oil phase in bulk or mixed with n -hexane were hydrolyzed using ammonia at 35 °C to obtain HSNP-2.…”

Section: Discussionmentioning

confidence: 99%

Novel Superhydrophobic Sand and Polyurethane Sponge Coated with Silica/Modified Asphaltene Nanoparticles for Rapid Oil Spill Cleanup

et al. 2019

View full text Add to dashboard Cite

Superhydrophobic nanomaterials are promising in the important pursuit to alleviate the environmental pollution caused by the petroleum crude oil industry, especially to clean-up oil spills. In this work, asphaltenes isolated from crude oil were modified to act as capping agents during the synthesis of hydrophobic silica nanoparticles (HSNPs). The chemical structure, surface morphology, particle size, and surfaces charge of HSNPs were investigated. The contact angles of water droplets on HSNP film surfaces were measured to investigate their wetting properties. Finally, superhydrophobic sand and polyurethane sponge were prepared by coating them with HSNPs and applied in the cleanup of oil spills of viscous heavy Arabian crude oil.

show abstract

Synthesis of silica nanoparticles using oil-in-water emulsion and the porosity analysis

Cited by 5 publications

References 42 publications

Designing an immunosensor for detection of Brucella abortus based on coloured silica nanoparticles

Designing an immunosensor for detection of Brucella abortus based on coloured silica nanoparticles

Coating Sand with New Hydrophobic and Superhydrophobic Silica/Paraffin Wax Nanocapsules for Desert Water Storage and Transportation

Novel Superhydrophobic Sand and Polyurethane Sponge Coated with Silica/Modified Asphaltene Nanoparticles for Rapid Oil Spill Cleanup

Contact Info

Product

Resources

About