Chemical Modification Methods of Nanoparticles of Silicon Carbide Surface (Review)

Yegorov, Anton Sergeyevich; Иванов, В. А.; Антипов, А. Н.; Wozniak, Alyona I.; Tcarkova, K. V.

doi:10.13005/ojc/310303

Cited by 10 publications

(5 citation statements)

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“…Although the diameters measured (25.266 and 35.367 nm for the Si-NPs and G-SiNPs, respectively) were slightly larger than those in the previous study considered (22.9 and 32.2 nm, respectively) [22], the size of the G-SiNPs was observed to be larger than that The particle sizes of the Si-NPs and G-SiNPs were quantitatively compared using DLS. Although the diameters measured (25.266 and 35.367 nm for the Si-NPs and G-SiNPs, respectively) were slightly larger than those in the previous study considered (22.9 and 32.2 nm, respectively) [22], the size of the G-SiNPs was observed to be larger than that of the Si-NPs, owing to the silanization reaction [22,38]. It was confirmed from the structural results that the GPTS with the epoxy group was successfully attached to the surface of the Si-NPs.…”

Section: Structural Features Of G-sinpscontrasting

confidence: 67%

“…The particle sizes of the Si-NPs and G-SiNPs were quantitatively compared using DLS. Although the diameters measured (25.266 and 35.367 nm for the Si-NPs and G-SiNPs, respectively) were slightly larger than those in the previous study considered (22.9 and 32.2 nm, respectively) [ 22 ], the size of the G-SiNPs was observed to be larger than that of the Si-NPs, owing to the silanization reaction [ 22 , 38 ]. It was confirmed from the structural results that the GPTS with the epoxy group was successfully attached to the surface of the Si-NPs.…”

Section: Resultsmentioning

confidence: 79%

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Effect of Silica Nanoparticles Blocked with Epoxy Groups on the Crosslinking and Surface Properties of PEG Hydrogel Films

et al. 2021

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Silica nanoparticles (G-SiNPs) blocked with 3-glycidoxypropyl trimethoxysilane (GPTS) were newly applied to hydrogel films for improving film coating properties and to distribute the epoxy groups on the film surface. The effects of the content of epoxy-functionalized G-SiNPs on the crosslinking features by photo-induced radical polymerization and the surface mechanical properties of the hydrogel films containing poly(ethylene glycol) dimethacrylate (PEGDMA) and glycidyl methacrylate (GMA) were investigated. The real-time elastic modulus of various PEG hydrogel mixtures with prepared particles was monitored using a rotational rheometer. The distribution of epoxy groups on the crosslinked film surface was directly and indirectly estimated by the elemental analysis of Si and Br. The surface mechanical properties of various hydrogel films were measured by nano-indentation and nano-scratch tests. The relationship between the rheological and surface properties of PEG-based hydrogel films suggests that the use of small amounts of G-SiNPs enhances the surface hardness and crosslinked network of the film and uniformly distributes sufficient epoxy groups on the film surface for further coating applications.

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Section: Structural Features Of G-sinpscontrasting

confidence: 67%

Section: Resultsmentioning

confidence: 79%

Effect of Silica Nanoparticles Blocked with Epoxy Groups on the Crosslinking and Surface Properties of PEG Hydrogel Films

et al. 2021

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“…Chemical functionalization of the SiC is commonly performed through the hydroxyl groups via the silanization route, well developed for the surface of SiO 2 . That procedure was successfully applied for monocrystalline SiC, , industry-made SiC NPs, − and thermally oxidized porous SiC . Another efficient method of modification and control of colloidal properties of the SiC NPs is a noncovalent bonding of soluble polymers. , Hydrolytically stable grafted layers could be formed on the SiC NPs by thermal decomposition of azo initiators via the interaction of free radicals with unsaturated carbon bonds of SiC surface according to authors’ suggestions.…”

Section: Introductionmentioning

confidence: 99%

Size and Surface Chemistry Tuning of Silicon Carbide Nanoparticles

et al. 2017

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Chemical transformations on the surface of commercially available 3C-SiC nanoparticles were studied by means of FTIR, XPS, and temperature-programmed desorption mass spectrometry methods. Thermal oxidation of SiC NPs resulted in the formation of a hydroxylated SiO surface layer with CSi-H and CH groups over the SiO/SiC interface. Controllable oxidation followed by oxide dissolution in HF or KOH solution allowed the SiC NPs size tuning from 17 to 9 nm. Oxide-free SiC surfaces, terminated by hydroxyls and CSi-H groups, can be efficiently functionalized by alkenes under thermal or photochemical initiation. Treatment of SiC NPs by HF/HNO mixture produces a carbon-enriched surface layer with carboxylic acid groups susceptible to amide chemistry functionalization. The hydroxylated, carboxylated, and aminated SiC NPs form stable aqueous sols.

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“…SiCnws can easily agglomerate, and many closed pores are formed in the densification process; thus, they cannot fully provide their strengthening and toughening benefits to the ceramics. Surface modification or the use of dispersants are common to improve the dispersibility of nano-reinforcements [31]. However, both of these methods introduce organic compounds, which may lead to unexpected reactions and product formation during ceramic sintering, affecting the purity and further influencing the performance of the ceramics.…”

Section: J U S T a C C E P T E Dmentioning

confidence: 99%

The enhanced mechanical properties of SiC nanowires/Ba _0.75Sr _0.25Al ₂Si ₂O ₈ ceramics with embedded SiO ₂ interface

Li,

Fan,

Luo

et al. 2024

Journal of Advanced Ceramics

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In this work, low-softening-temperature and low-modulus SiO2 was introduced as an embedded interface between SiC nanowires (SiCnws) and the BaxSr1−xAl2Si2O8 ceramic matrix to enhance the strength and toughness of the ceramic. In the sintering process, molten SiO2 enhances the flowability of the ceramic powders and modifies the dispersion of the SiCnws. The strengthening effect of SiCnws was fully realized, and the flexural strength of the optimized ceramics reaches 193±16 MPa, which represents an increase of 52.6%. After the formation of the embedded SiO2 interface with a low modulus, cracks can deflect along the SiCnws surface, which is consistent with the criterion of He and Hutchinson. This can effectively extend the crack propagation path, and the fracture toughness is thus improved by 94.0%, reaching 3.1±0.5 MPa• m 1/2 .

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Chemical Modification Methods of Nanoparticles of Silicon Carbide Surface (Review)

Cited by 10 publications

References 0 publications

Effect of Silica Nanoparticles Blocked with Epoxy Groups on the Crosslinking and Surface Properties of PEG Hydrogel Films

Effect of Silica Nanoparticles Blocked with Epoxy Groups on the Crosslinking and Surface Properties of PEG Hydrogel Films

Size and Surface Chemistry Tuning of Silicon Carbide Nanoparticles

The enhanced mechanical properties of SiC nanowires/Ba _0.75Sr _0.25Al ₂Si ₂O ₈ ceramics with embedded SiO ₂ interface

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Chemical Modification Methods of Nanoparticles of Silicon Carbide Surface (Review)

Cited by 10 publications

References 0 publications

Effect of Silica Nanoparticles Blocked with Epoxy Groups on the Crosslinking and Surface Properties of PEG Hydrogel Films

Effect of Silica Nanoparticles Blocked with Epoxy Groups on the Crosslinking and Surface Properties of PEG Hydrogel Films

Size and Surface Chemistry Tuning of Silicon Carbide Nanoparticles

The enhanced mechanical properties of SiC nanowires/Ba 0.75Sr 0.25Al 2Si 2O 8 ceramics with embedded SiO 2 interface

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The enhanced mechanical properties of SiC nanowires/Ba _0.75Sr _0.25Al ₂Si ₂O ₈ ceramics with embedded SiO ₂ interface