Study on the graft modification mechanism of macroporous silica gel surface based on silane coupling agent vinyl triethoxysilane

Wang, Zheng; Liu, Meichen; Chang, Ziwei; Li, Hui-bo

doi:10.1039/d1ra04296c

Cited by 24 publications

(15 citation statements)

References 44 publications

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“…The porous silica gel (SG) was modified with the coupling agent vinyl triethoxy silane to obtain alkylated silica gel (SG-VTS), and the reaction conditions for optimal grafting rate have been determined in the previous study [ 20 ]. SG-VTS, 4-vinylpyridine (4-VP) and acetonitrile solvent were placed in a DDL-2000 reactor (Eyela, Japan) and stirred for 15 min.…”

Section: Methodsmentioning

confidence: 99%

“…In the authors’ last study, we used coupling agent triethoxyvinylsilane (KH-151) to modify the surface of porous silica gel, explored the mechanism of the alkylation reaction on the surface of silica gel, and optimized the modification process through the grafting rate [ 20 ]. On this basis, this study uses 4-vinylpyridine (4-VP) monomer to polymerize and graft on the surface of alkylated silica gel and quaternize it.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Silica-Based Quaternized Adsorption Material and Study on Its Adsorption Behavior for Pu(IV)

Wang¹,

Liu²,

Chang³

et al. 2022

Molecules

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In this research, we explored the synthesis optimization of the silica-based quaternized adsorption material (SG-VTS-VPQ) and its adsorption behavior for Pu(IV). By optimizing the synthesis process, the grafting amount of 4-vinylpyridine reached 1.25 mmol·g−1. According to the analysis of NMR and XPS, the quaternization rate of pyridine groups reached 91.13%. In the adsorption experiments, the thermodynamic experiment results show that the adsorption of Pu(IV) by SG-VTS-VPQ is more in line with the Langmuir adsorption model and the adsorption type is a typical chemical adsorption; the kinetic results show that adsorption process is more in line with the pseudo first-order kinetic model, and the larger specific surface area of SG-VTS-VPQ plays an important role in the adsorption. The results of the adsorption mechanism show that the adsorption of Pu(IV) by SG-VTS-VPQ is mainly complex anion Pu(NO3)62− and Pu(NO3)5−. This research provides in-depth and detailed ideas for the surface modification and application of porous silica gel, and at the same time provides a new way to develop the direction of the analysis of pretreatment materials in the spent fuel reprocessing field.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis of Silica-Based Quaternized Adsorption Material and Study on Its Adsorption Behavior for Pu(IV)

Wang¹,

Liu²,

Chang³

et al. 2022

Molecules

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“…Additionally, R stands for alkyl chains that are compatible with polyester. (3-Mercaptopropyl) triethoxysilane MPTS [130] γ-methacryloyloxypropyltrimethoxysilane MPS [26,131] Vinyltriethoxysilane VTEOS [132,133] Zhang et al [26] successfully converted hydrophilic SNs to hydrophobic ones through silylation reaction between γ-methacryloyloxypropyltrimethoxysilane (MPS) and hydroxyl groups on the SNs surface. MPS molecules were grafted to the SNs surface through three mechanisms (Figure 3a).…”

Section: Grafting Silane Coupling Agentmentioning

confidence: 99%

“…In the beginning, MPS was hydrolyzed in the presence of water and acid to produce reactive Si-OH groups. Subsequently three possibilities [132,133] Zhang et al [26] successfully converted hydrophilic SNs to hydrophobic ones through silylation reaction between γ-methacryloyloxypropyltrimethoxysilane (MPS) and hydroxyl groups on the SNs surface. MPS molecules were grafted to the SNs surface through three mechanisms (Figure 3a).…”

Section: Grafting Silane Coupling Agentmentioning

confidence: 99%

“…Thirdly, the MPS molecules condense with each other, resulting in a chain or network structure grafted to the SNs surface (Figure 3(a3)). Wang et al [132] studied the grafting modification mechanism of the coupling agent vinyltriethoxysilane (VTEOS) to macroporous silica gel. The coupling agent molecules have two types of connection on the surface of silica gel (Figure 3b,c), and the proportions of these two types are 43.51% and 56.49%, respectively.…”

Section: Grafting Silane Coupling Agentmentioning

confidence: 99%

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Emerging Applications of Silica Nanoparticles as Multifunctional Modifiers for High Performance Polyester Composites

et al. 2021

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Nano-modification of polyester has become a research hotspot due to the growing demand for high-performance polyester. As a functional carrier, silica nanoparticles show large potential in improving crystalline properties, enhancing strength of polyester, and fabricating fluorescent polyester. Herein, we briefly traced the latest literature on synthesis of silica modifiers and the resultant polyester nanocomposites and presented a review. Firstly, we investigated synthesis approaches of silica nanoparticles for modifying polyester including sol-gel and reverse microemulsion technology, and their surface modification methods such as grafting silane coupling agent or polymer. Then, we summarized processing technics of silica-polyester nanocomposites, like physical blending, sol-gel processes, and in situ polymerization. Finally, we explored the application of silica nanoparticles in improving crystalline, mechanical, and fluorescent properties of composite materials. We hope the work provides a guideline for the readers working in the fields of silica nanoparticles as well as modifying polyester.

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Surface Charge Modification on 2D Nanofluidic Membrane for Regulating Ion Transport

Xie

Tang

Qin

et al. 2022

Adv Funct Materials

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2D nanofluidic membranes are capable of regulating ion transport toward various applications concerning energy and environment, which is primarily contributed by the excess charge on the interior surface of narrow nanoscale pores. However, there is still a lack of comprehensive summaries and discussions on the surface charge modification principles and strategies of 2D nanofluidic membranes, as well as the practical applications of charge‐modified 2D nanofluidic membranes for regulating ion transport. In this review, the surface charge modification principles and charge modification methods of 2D nanofluidic membranes are first introduced in detail, which is of great significance for improving the ion regulation capability of membranes and realizing the design of nanochannel materials. Next, recent advances in the two typical applications of concentration cells and water treatment based on charge‐modified 2D nanofluidic membranes are summarized. Finally, some challenges and prospects related to charge‐modified 2D nanofluidic membranes are discussed to indicate directions for future research in this field. It is anticipated that this review will provide valuable strategies for the development of high‐performance charge‐modified 2D nanofluidic membranes toward energy and environment applications.

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Study on the graft modification mechanism of macroporous silica gel surface based on silane coupling agent vinyl triethoxysilane

Abstract: Study on the mechanism of the alkylation reaction on the surface of porous silica gel.

Cited by 24 publications

References 44 publications

Synthesis of Silica-Based Quaternized Adsorption Material and Study on Its Adsorption Behavior for Pu(IV)

Synthesis of Silica-Based Quaternized Adsorption Material and Study on Its Adsorption Behavior for Pu(IV)

Emerging Applications of Silica Nanoparticles as Multifunctional Modifiers for High Performance Polyester Composites

Surface Charge Modification on 2D Nanofluidic Membrane for Regulating Ion Transport

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