Fabrication of mesoporous silica hollow spheres using triblock copolymer PEG–PPG–PEG as template

Wang, Xian; Miao, Xinrui; Li, Zhuomin; Deng, Wenli

doi:10.1016/j.jnoncrysol.2009.12.029

Cited by 32 publications

(14 citation statements)

References 39 publications

(44 reference statements)

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“…The encapsulation did not begin, and the emulsion was not formed in alkaline pH. PEO‐b‐PPG‐b‐PEO capsulation behaviour was inconsistent with the literature . In the prepared concentration, micelle samples were poured onto the glass surface and dried under room conditions.…”

Section: Resultsmentioning

confidence: 93%

pH‐controlled lavender oil capsulation with ABA‐type block copolymer and usage in paper coating

Kandırmaz

Bi̇rtane

Çi̇ği̇l

et al. 2019

Flavour & Fragrance J

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The aim of this study is to produce a lavender oil capsules with triblock copolymer and to use these capsules for providing scented paper. Thus, polyethylene oxide‐polypropylene glycol‐polyethylene oxide (PEO‐b‐PPG‐b‐PEO) ABA‐type block copolymer was synthesized by means of Atom Transfer Radical Polymerization and the chemical structure of PEO‐b‐PPG‐b‐PEO was characterized by ATR‐FTIR and 1H‐NMR. Moreover, block ratio of the PEO‐b‐PPG‐b‐PEO was identified with 1H‐NMR. Lavender oil was encapsulated in the polymer by micellization of interactions between hydrophilic‐lipophilic‐hydrophilic polymer and oil. These interactions include lavender oil and lipophilic block interaction and oil‐hydrophilic group repulsion. In addition, hydrophilic groups interacted with water to keep the micelles suspended. The critical micelle concentration and size of the micelles were analysed with SEM. Decomposition of capsules was determined by UV spectroscopy with respect to pH change. Paper coating formulations were prepared with fragrant capsules and coated on paper with laboratory‐type coating machine. The colour and gloss of obtained papers were determined by spectrophotometer and glossmeter. As a result, PEO‐b‐PPG‐b‐PEO polymer can be used to encapsulate lavender oil, and the resulting capsules have functioned without degradation in the paper coating.

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Section: Resultsmentioning

confidence: 93%

pH‐controlled lavender oil capsulation with ABA‐type block copolymer and usage in paper coating

Kandırmaz

Bi̇rtane

Çi̇ği̇l

et al. 2019

Flavour & Fragrance J

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“…In order to promote the formation of the emulsion system or stabilize the emulsion droplets, some organic additives (co‐solvents), such as N,N‐dimethylformide (DMF), n‐octane or dodecyl amine (DDA), have been used to cooperate with the TEOS. It has been shown that DMF added in the solution as a bridging co‐solvent can both promote the dispersion of TEOS in the aqueous solution to form small droplets, and speed up the hydrolysis of TEOS at the interface .…”

Section: Design and Chemical Synthesis Of Hmmsmentioning

confidence: 99%

Hollow‐Structured Mesoporous Materials: Chemical Synthesis, Functionalization and Applications

2014

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Hollow-structured mesoporous materials (HMMs), as a kind of mesoporous material with unique morphology, have been of great interest in the past decade because of the subtle combination of the hollow architecture with the mesoporous nanostructure. Benefitting from the merits of low density, large void space, large specific surface area, and, especially, the good biocompatibility, HMMs present promising application prospects in various fields, such as adsorption and storage, confined catalysis when catalytically active species are incorporated in the core and/or shell, controlled drug release, targeted drug delivery, and simultaneous diagnosis and therapy of cancers when the surface and/or core of the HMMs are functionalized with functional ligands and/or nanoparticles, and so on. In this review, recent progress in the design, synthesis, functionalization, and applications of hollow mesoporous materials are discussed. Two main synthetic strategies, soft-templating and hard-templating routes, are broadly sorted and described in detail. Progress in the main application aspects of HMMs, such as adsorption and storage, catalysis, and biomedicine, are also discussed in detail in this article, in terms of the unique features of the combined large void space in the core and the mesoporous network in the shell. Functionalization of the core and pore/outer surfaces with functional organic groups and/or nanoparticles, and their performance, are summarized in this article. Finally, an outlook of their prospects and challenges in terms of their controlled synthesis and scaled application is presented.

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“…It can be seen only a single broad peak at 2h % 20°in the spectra for PAM/SiO 2 after calcination at 550°C. This indicates that SiO 2 hollow microspheres with porous is in the amorphous state [14].…”

Section: Morphology Of Pam Micro-gelsmentioning

confidence: 95%

“…The result shows the spheres have very high specific surface area up to 700 m 2 /g, the spheres can be potentially used as capsules for controlled release of drug and dyes. Most recently, Wang et al fabricated mesoporous silica hollow spheres with ordered surface morphologies using a single-step, emulsion template method [14]. They used PEG-PPG-PEG as a template, n-octane as core materials, and benzyl alcohol as emulsion generator to fabricate hierarchical mesoporous silica hollow spheres with monodisperse microcapsule and uniform shells.…”

Section: Introductionmentioning

confidence: 99%

Silicon dioxide hollow microspheres with porous composite structure: Synthesis and characterization

Yan

Lei

2011

Journal of Colloid and Interface Science

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Fabrication of mesoporous silica hollow spheres using triblock copolymer PEG–PPG–PEG as template

Cited by 32 publications

References 39 publications

pH‐controlled lavender oil capsulation with ABA‐type block copolymer and usage in paper coating

pH‐controlled lavender oil capsulation with ABA‐type block copolymer and usage in paper coating

Hollow‐Structured Mesoporous Materials: Chemical Synthesis, Functionalization and Applications

Silicon dioxide hollow microspheres with porous composite structure: Synthesis and characterization

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