Hybrid mesoporous silica nanospheres modified by poly
The synthesis of drug delivery systems based on surface-modified mesoporous silica hollow structures remains a huge challenge. In this paper we have obtained hollow mesoporous silica nanoparticles (MSNs) by surfactant directed sol-gel assisted hydrothermal treatment. A type of tunable particles consisting of a soft poly(N-isopropylacrylamide) (PNIPAM) core and a solid shell were directly synthesized in toluene via a facile one-pot copolymerization of N-isopropylacrylamide (NIPAM) (3-Methacryloyloxypropyl)methyldiethoxysilane (MADS) and N N′-methylenebis(2-propenamide) (MBA). Of particular concern is the shells potential to burst due to the swelling
Get Price
Facile synthesis of tunable core-shell particles via one
A type of tunable particles consisting of a soft poly(N-isopropylacrylamide) (PNIPAM) core and a solid shell were directly synthesized in toluene via a facile one-pot copolymerization of N-isopropylacrylamide (NIPAM) (3-Methacryloyloxypropyl)methyldiethoxysilane (MADS) and N N′-methylenebis(2-propenamide) (MBA). Of particular concern is the shells potential to burst due to the swelling The synthesis of drug delivery systems based on surface-modified mesoporous silica hollow structures remains a huge challenge. In this paper we have obtained hollow mesoporous silica nanoparticles (MSNs) by surfactant directed sol-gel assisted hydrothermal treatment.
Get Price
Synthesis of temperature-responsive magnetic mesoporous
Apr 20 2020 · PNIPAM/amino group/magnetite/mesoporous silica composite (PAMMS) was synthesized. A facile process for the preparation of multifunctional nanospheres combining several advantages of mesoporous channels up-conversion (UC) luminescence and photothermal responses into one single entity is reported. First Gd2O3 Yb/Er assembled mesoporous silica with 2D hexagonal (MCM-41) and 3D cubic (MCM-48) network have been prepared via a one-step procedure.
Get Price
Mesoporous silica–carbon composites fabricated by a
3.1 Synthetic strategy of silica–carbon composite materials Mesoporous silica–carbon composite materials were designed and synthesized by using a universal strategy of hydrothermal carbonization with the advantages of controlled morphology (shape or size) and pore size. The synthesis route is shown in Scheme 1. Use of amphiphilic triblock copolymers to direct the organization of polymerizing silica species has resulted in the preparation of well-ordered hexagonal mesoporous silica structures (SBA-15) with uniform pore sizes up to approximately 300 angstroms. The SBA-15 materials are synthesized in acidic media to produce highly ordered two-dimensional hexagonal (space group p 6 mm ) silica-block
Get Price
Thermoresponsive Transport through Ordered Mesoporous
Nov 29 2006 · Synthesis of thermosensitive polymer/mesoporous silica composite and its temperature dependence of anion exchange property. Journal of Colloid and Interface Science 2011 354 (2) . DOI 10.1016/j.jcis.2010.10.040. Qianjun He Jianlin Shi. A kind of core-shell hybrid nanoparticle comprised of a hollow mesoporous silica nanoparticles (HMS) core and a copolymer shell bearing N-(3 4-dihydroxyphenethyl) methacrylamide (DMA) and N-isopropylacrylamide (NIPAM) as responsive moieties was prepared. Moreover the factors that could impact the surface morphology and hierarchical porous structure were discussed.
Get Price
Nonionic Triblock and Star Diblock Copolymer and
rous silica and alumina in neutral media assembled by hydrogen-bonding interactions.8-10 Attard et al.11 have synthesized hexagonal mesoporous silica phases using concentrated (˘50 wt ) C12EO8 solutions and suggested that the formation of mesoporous silica under these conditions occurs by a "real" liquid crystal template route. Amine hybrid titania/silsesquioxane composite aerogel (AHTSA) was prepared by an one-pot sol–gel process without any catalyst. The sol-gel reaction mechanism of AHTSA was proposed. The use of 3-aminopropyltriethoxysilane (APTES) plays as an "internal catalyst" and promotes the formation of gel during sol–gel process. The morphology microstructure pore structure and CO2 capture
Get Price
Synthesis of pore-expanded mesoporous ZIF-8/silica
Abstract. The synthesis of mesoporous zeolitic imidazolate framework-8/silica composites with foam-like structure templated by Pluronic P123 (EO 20 PO 70 EO 20) block copolymer surfactant in the presence of swelling agent was demonstrated in this study was found that 1 3 5-trimethylbenzene was a suitable swelling agent which worked effectively in the pluronic-P123-templated synthesis of Jan 23 2021 · The advantages of mesoporous hydroxyapatite and the thermo-responsive property of poly-N-isopropylacrylamide make them attractive in drug delivery system respectively. In this work mesoporous poly-N-isopropylacrylamide-hydroxyapatite composite microspheres (PNIPAM-m-HAP) were synthesized characterized and applied as a drug carrier.
Get Price
Synthesis of pore-expanded mesoporous ZIF-8/silica
Abstract. The synthesis of mesoporous zeolitic imidazolate framework-8/silica composites with foam-like structure templated by Pluronic P123 (EO 20 PO 70 EO 20) block copolymer surfactant in the presence of swelling agent was demonstrated in this study was found that 1 3 5-trimethylbenzene was a suitable swelling agent which worked effectively in the pluronic-P123-templated synthesis of 3.1 Synthetic strategy of silica–carbon composite materials Mesoporous silica–carbon composite materials were designed and synthesized by using a universal strategy of hydrothermal carbonization with the advantages of controlled morphology (shape or size) and pore size. The synthesis route is shown in Scheme 1.
Get Price
Nonionic Triblock and Star Diblock Copolymer and
rous silica and alumina in neutral media assembled by hydrogen-bonding interactions.8-10 Attard et al.11 have synthesized hexagonal mesoporous silica phases using concentrated (˘50 wt ) C12EO8 solutions and suggested that the formation of mesoporous silica under these conditions occurs by a "real" liquid crystal template route. Aug 17 2018 · Ultrahydrophobic mesoporous silica nanoparticles (MSNPs) were prepared using a simple one-pot synthesis. A template of polystyrene (PS) was simultaneously synthesized during condensation of tetraethyl orthosilicate (TEOS). Co-condensation of TEOS with trimethyl (fluoromethyl) silane provided core–shell MSNPs with low surface energies.
Get PriceOne-pot sol–gel synthesis of amine hybrid titania
Amine hybrid titania/silsesquioxane composite aerogel (AHTSA) was prepared by an one-pot sol–gel process without any catalyst. The sol-gel reaction mechanism of AHTSA was proposed. The use of 3-aminopropyltriethoxysilane (APTES) plays as an "internal catalyst" and promotes the formation of gel during sol–gel process. The morphology microstructure pore structure and CO2 capture Hollow mesoporous silica microspheres (HMS) were 108 obtained after calcination in air at 300 °C for 2 h and then at 550 °C for 5 h. Fourier transform infrared Figure 1. Schematic illustration of the synthesis process of (a) hollow mesoporous silica (HMS) and (b) doxorubicin (DOX) HMS P(NIPAM-co-DMA-Fe3 ). (c) Schematic diagram of drug
Get Price
Synthesis of P(NIPAM-co-Am)/Mesoporous Silica Composites
hydrophobicity such as methacrylate butyl 16 . However the transition temperature of the mesoporous silica covered with the P(NIPAM-co-Am) copolymer has not been clarified yet. In this study the influence of the ad-dition of the Am on the structure and the transition temperature of the prepared composites was examined. 2. Experimental 2.1. In this work we report a detailed study on the synthesis and characterization of a complex nanosystem composed of nanoparticles with a single magnetic nanoparticle core and a shell of dense and
Get PriceFrontiers Templated Growth of Crystalline Mesoporous
Jan 30 2019 · Zhao et al. showed the synthesis of a mesoporous Co 3 O 4 carbon nanotube using double templates of silica and carbon. The resultant oxide-in-tube nanostructures possess a specific surface area up to 750 m 2 g −1 and a controllable size of Co 3 O 4 between 3 and 7 nm. Oct 16 2020 · Silva C R P Ferreira F R Webler G D Silva A O S Abreu F C and Fonseca R J S 2017 Encapsulation of mangiferin in ordered mesoporous silica type SBA-15 synthesis and characterization Mater. Res. Exp. 4 065402. IOPscience Google Scholar
Get Price
Facile synthesis of tunable core-shell particles via one
A type of tunable particles consisting of a soft poly(N-isopropylacrylamide) (PNIPAM) core and a solid shell were directly synthesized in toluene via a facile one-pot copolymerization of N-isopropylacrylamide (NIPAM) (3-Methacryloyloxypropyl)methyldiethoxysilane (MADS) and N N′-methylenebis(2-propenamide) (MBA). Of particular concern is the shells potential to burst due to the swelling A series of tunable multiple heteroatom–doped mesoporous carbon/silica composites have been synthesized.
Get Price
Synthesis of multiple heteroatom–doped mesoporous carbon
A series of tunable multiple heteroatom–doped mesoporous carbon/silica composites have been synthesized. this work thermoresponsive polymer-P(NIPAM-MAm) coated mesoporous Fe 3O 4 nanoparticles-MIO-P(NIPAM-MAm) nano-composites have successfully been prepared and characterized using various techniques. Further MIO-P(NIPAM-MAm) nano-composites were loaded with Cur and Dox. The drugs released behaviour and anticancer activity of MIO-P(NIPAM-MAm)-Cur-
Get Price
Synthesis of thermosensitive polymer/mesoporous silica
An anion exchanger consisting of amino-functionalized MCM-41 type mesoporous silica coated with temperature-responsive polymer poly(N-isopropylacrylamide) (PNIPAM) was synthesized in this study. An anion exchanger consisting of amino-functionalized MCM-41 type mesoporous silica coated with temperature-responsive polymer poly(N-isopropylacrylamide) (PNIPAM) was synthesized in this study.
Get Price
Synthesis of pore-expanded mesoporous ZIF-8/silica
The synthesis of mesoporous zeolitic imidazolate framework-8/silica composites with foam-like structure templated by Pluronic P123 (EO 20 PO 70 EO 20 ) block copolymer surfactant in the presence of swelling agent was demonstrated in this study. It was found that 1 3 5-trimethylbenzene was a suitable swelling agent which worked effectively in the pluronic-P123-templated synthesis of zeolitic Facile synthesis of sulfonated carbon-silica-meso composite and mesoporous silica Devaki Nandan Peta Sreenivasulu Sandeep K. Saxena and Nagbhatla Viswanadham Catalyst and Conversion Processes Division Indian Institute of Petroleum Council of Scientific and Industrial Research Dehradun India. E-mail nvish iip.res
Get Price
Synthesis of multiple heteroatom–doped mesoporous carbon
A series of tunable multiple heteroatom–doped mesoporous carbon/silica composites have been synthesized. Poly(N-isopropylacrylamide) (variously abbreviated PNIPA PNIPAAm NIPA PNIPAA or PNIPAm) is a temperature-responsive polymer that was first synthesized in the 1950s can be synthesized from N-isopropylacrylamide which is commercially available is synthesized via free-radical polymerization and is readily functionalized making it useful in a variety of applications.
Get Price
One-pot sol–gel synthesis of amine hybrid titania
Amine hybrid titania/silsesquioxane composite aerogel (AHTSA) was prepared by an one-pot sol–gel process without any catalyst. The sol-gel reaction mechanism of AHTSA was proposed. The use of 3-aminopropyltriethoxysilane (APTES) plays as an "internal catalyst" and promotes the formation of gel during sol–gel process. The morphology microstructure pore structure and CO2 capture Hollow mesoporous silica microspheres (HMS) were 108 obtained after calcination in air at 300 °C for 2 h and then at 550 °C for 5 h. Fourier transform infrared Figure 1. Schematic illustration of the synthesis process of (a) hollow mesoporous silica (HMS) and (b) doxorubicin (DOX) HMS P(NIPAM-co-DMA-Fe3 ). (c) Schematic diagram of drug
Get Price
