Preparation and thermal properties of mesoporous silica/phenolic resin nanocomposites via in situ polymerization

Abstract

In order to enhance the adhesion between inorganic particles and polymer matrix, in this paper, the mesoporous silica SBA-15 material was synthesized by the sol-gel method. The surface of SBA-15 was modified using γ-glycidyloxypropyltrimethoxysilane (GOTMS) as a coupling agent, and then mesoporous silica/phenolic resin (SBA-15/PF) nanocomposites were prepared via in situ polymerization. The structural parameters and physical properties of SBA-15, SBA-15-GOTMS (SBA-15 surface treated using GOTMS as coupling agents) and E-SBA-15/PF (SBA-15/PF nanocomposites extracted using ethanol as solvent) were characterized by X-ray diffraction (XRD), N2 adsorption-desorption, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and thermogravimetric analysis (TGA). The thermal properties of the nanocomposites were studied by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The results demonstrated that the GOTMS were successfully grafted onto the surface of SBA-15, and chemical bonds between PF and SBA-15-GOTMS were formed after in situ polymerization. In addition, it is found that the in situ polymerization method has great effects on the textural parameters of SBA-15. The results also showed that the glass transition temperatures and thermal stability of the PF nanocomposites were obviously enhanced as compared with the pure PF at silica contents between 1–3 wt%, due to the uniform dispersion of the modified SBA-15 in the matrix

A review on new mesostructured composite materials: Part II. Characterization and properties of polymer–mesoporous silica nanocomposite

“…The large variety of polymer systems used in nanocomposites preparation with mesoporous silica can be divided into four categories. (i) vinyl polymers, for example, methyl methacrylate, 13–16 other acrylates, 17 polystyrene 18–20 , and poly vinyl acetate (PVAc); 21 (ii) condensation (step) polymers like epoxy polymer resins (EPR), 22–26 nylon 6 (N6), 27 N66, 28 polyethylene oxide (PEO), 29,30 polybutadiene, 31 butadiene copolymers, 32,33 natural rubber, 34 silicone rubber, 35 phenolic resins, 36 polyimides, 37 and polysulfone; 38 (iii) polyolefins including polypropylene (PP) 39–43 and polyethylene (PE); 44,45 and (v) specialty polymers such as polypyrrole (PPY) 46 and polyaromatics such as polyaniline (PANI). 47…”

Guanine‐La complex supported onto SBA‐15: A novel efficient heterogeneous mesoporous nanocatalyst for one‐pot, multi‐component Tandem Knoevenagel condensation–Michael addition–cyclization Reactions

“…More recently, SBA-15 was used as a promising inorganic support due to its structural properties and various technological applications such as molecular sieves, sensors, catalysts, nanoelectronics, drug delivery and separation. [48][49][50][51][52][53][54] Recent studies have demonstrated that several factors can control the condensation rates of SBA-15 which contains amounts of inorganic salts, shape of surfactant micelles, stirring rate and condensation rate of silica. [55] On the other hand, metal-organic complexes, involving rare earth elements such as lanthanide ions, are often used in catalysis field because they have the oxophilic nature and can easily build a framework structure.…”

“…Besides, it is worth mentioning that a permanent effort has also been made in order to develop textured inorganic or hybrid phases. More recently, SBA‐15 was used as a promising inorganic support due to its structural properties and various technological applications such as molecular sieves, sensors, catalysts, nanoelectronics, drug delivery and separation . Recent studies have demonstrated that several factors can control the condensation rates of SBA‐15 which contains amounts of inorganic salts, shape of surfactant micelles, stirring rate and condensation rate of silica .…”

Synthesis of Poly(4-vinylpyridine)-Grafted Ordered Mesoporous Silica via Surface-Initiated Reversible Addition-Fragmentation Chain Transfer Polymerization

“…[7][8][9] Recently, numerous methods have been developed for the controlled synthesis of various polymers in the mesoporous silicas, such as SBA-15, MCM-41, MCM-48, which own high surface area, strict porous structures, and easily surface functionalization. [10][11][12] The most synthetic strategies for incorporating polymer guest into the mesoporous silica material host have been dependent on the approach of adsorption or in situ polymerization. For example, polyphenylenevinylene derivative polymer has been encapsulated into the mesoporous SBA-15 platelets by direct impregnation, 13 and polyphenylenevinylene can also be included in the mesoporous metal oxides via in situ polymerization.…”