Influence of Reaction Conditions on the Grafting Pattern of 3-Glycidoxypropyl trimethoxysilane on Montmorillonite

He, Wentao; Yao, Yong; He, Min; Zhang, Kai; Long, Lijuan; Qin, Shuhao; Yu, Jianxing

doi:10.5012/bkcs.2013.34.1.112

Cited by 15 publications

(12 citation statements)

References 21 publications

(14 reference statements)

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“…When a short time is given for the reaction in low concentration of APTES, grafting mainly occurs on the broken edges of BNC. When stirring and increasing the reaction time, grafting reaction occurs not only on the edge but also on the interlayer nanospace [10].…”

Section: Resultsmentioning

confidence: 99%

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A facile method to modify bentonite nanoclay with silane

et al. 2017

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Immobilization of smectite clay onto a desirable surface has received much attention, since its nanospace can be utilized for many applications in material science. Here, we present an efficient method to functionalize surface of bentonite nanoclay (BNC) through the grafting of 3-aminotriethoxysilane (APTES). Infrared spectroscopy and elemental analysis confirmed the presence of organic chains and amine groups in modified nanoclay. XRD analysis confirmed grafting of APTES on the surface of bentonite nanoclay without intercalation. The accomplishment of the surface modification was quantitatively proved by TGA analysis. Modified BNC can covalently couple with different material surfaces, allowing its nanospace to be utilized for intercalation of cations, bio-molecules, and polymeric materials, to be used in advanced military aerospace, pharmaceuticals, and many other commercial applications.

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Section: Resultsmentioning

confidence: 99%

“…In spectrum (c), intensive bands in approximately 1200-1100 cm -1 represent the asymmetric stretching of siloxane groups (Si-O-Si). These bands correspond to a combination of Si-O-Si vibrational modes including those of bonds formed between the silane and clay surface and cross-linking between silane molecules on the surface [10].…”

Section: Resultsmentioning

confidence: 99%

A facile method to modify bentonite nanoclay with silane

et al. 2017

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“…According to the study of He et al , the amount of the final grafted KH550 and MDBP‐POOH on silica sol could be estimated by TGA. Equation is used to determine the amount of grafted organics based on the weight loss between 100°C and 800°C:

Grafted amount (m m o l / g) = \frac{10^{3} W_{(100 - 800)}}{M (100 - W_{(100 - 800)})}

where M (g/mol) is the molecular weight of the grafted sample molecules.…”

Section: Resultsmentioning

confidence: 99%

A novel silica‐based nucleating agent for polypropylene: Preparation, characterization, and application

Long

et al. 2015

Vinyl Additive Technology

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Inorganic silica is widely used as nucleating agents for isotactic polypropylene (iPP), and to achieve a better effect, the amount of addition is generally higher than 5 wt%. A novel silica‐based nucleating agent (SPKSol) was prepared by two steps: aromatic phosphate (MDBP‐POOH) was first supported on the silica sol via chemical reaction with γ‐aminopropyltrimethylsilane (KH550) as the linker, and the obtained product (PKSol) was further processed by spray‐drying. Fourier‐transform infrared spectrometry and thermogravimetric analysis confirmed the incorporation of MDBP‐POOH on the silica sol. The results demonstrated a spherical particle with an average size of 5 μm, and a slit‐shaped pore structure was formed from the originally formed nano‐sized particles of PKSol after the spray‐drying process. Transmission electron microscopy showed that the SPKSol was well‐dispersed in the iPP matrix. Incorporating a very small amount of SPKSol (0.2 wt%) can effectively increase the crystallization temperature and improve the mechanical properties of polypropylene. In addition, the addition of SPKSol could even shift the haze of polypropylene to a lower value, obviously lower than that with PKSol as the nucleating agent. The preparation, characterization of SPKSol, and their application in iPP composites were explored in detail. J. VINYL ADDIT. TECHNOL., 24:58–67, 2018. © 2015 Society of Plastics Engineers

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“…, and the intercalation agent ethoxyltriphenyl phosphonium chloride (ETPC) was synthesized according to Ref. . Carbon dioxide was obtained from Air Liquide, China (purity 99.995%).…”

Section: Methodsmentioning

confidence: 99%

Enhanced dispersion of nanoclays in poly(ethylene terephthalate)/clay nanocomposites using supercritical carbon dioxide

Xie

Qin

et al. 2016

Vinyl Additive Technology

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Nanoclays were prepared using supercritical carbon dioxide (scCO 2 ) as a medium, and then blended with polyethylene terephthalate (PET) via conventional melt blending processing. The structure and morphology of nanoclays were investigated using wide-angle X-ray diffraction (WAXD) and scanning electron microscopy (SEM). It was found that, compared with the original organically modified layer silicates, smaller nanoclay tactoids and individual platelets morphology could be obtained after they were processed by scCO 2 , indicating scCO 2 processing could enhance exfoliation of nanoclays. WAXD and transmission electron microscopy measurements were used to evaluate the dispersion of nanoclays in the nanocomposites. The results indicated the conventional blending extrusion processing could help to improve the dispersion of nanoclays, and the nanocomposites containing scCO 2 pretreated nanoclays formed a looser clay stack and an improved intercalation structure, compared with those containing as-received nanoclays. Thermal and mechanical properties of the nanocomposites were also studied by differential scanning calorimetry (DSC) and dynamic mechanical analysis, and the results showed that crystallization rate, crystallinity, and storage modulus of the well-dispersed nanocomposites containing scCO 2 pretreated nanoclays were increased, compared with the neat PET and nanocomposites containing asreceived nanoclays or nanoclays prepared by conventional organomodification process in water. J. VINYL ADDIT. TECHNOL., 23:E58-E67, 2017.

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Influence of Reaction Conditions on the Grafting Pattern of 3-Glycidoxypropyl trimethoxysilane on Montmorillonite

Cited by 15 publications

References 21 publications

A facile method to modify bentonite nanoclay with silane

A facile method to modify bentonite nanoclay with silane

A novel silica‐based nucleating agent for polypropylene: Preparation, characterization, and application

Enhanced dispersion of nanoclays in poly(ethylene terephthalate)/clay nanocomposites using supercritical carbon dioxide

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