Stability of high internal phase emulsions with sole cationic surfactant and its tailoring morphology of porous polymers based on the emulsions

Zhang, Shengmiao; Chen, Jianding; Perchyonok, V. Tamara

doi:10.1016/j.polymer.2008.11.004

Cited by 60 publications

(35 citation statements)

References 36 publications

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“…Standard plasma samples with seven different concentrations (5,10,25,50,75, 100 and 150 ng/mL) of nifedipine were analyzed to obtain the intra-day calibration curve. Each sample was injected for three times.…”

Section: On Line Assay Of Nifedipine In Plasma Samplementioning

confidence: 99%

“…In recent years, emulsion templating polymerization technology has been introduced in the preparation of monolith due to well defined open porous material that has good mechanical strength and possess favorable stability. Emulsions are colloidal systems made of liquid droplets dispersed in another liquid phase, which are produced by shearing these two immiscible liquids to reach a metastable state through fragmentation of one phase into the other with various surfactants [5]. Moreover, the preparation of water-in-oil emulsions containing polar monomers requires a careful selection of the surfactant and the formulation of the continuous phase.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of a Novel Emulsion-Templated MIP Monolith and its Application for on Line Assay of Nifedipine in Human Plasma

Yang¹,

Liu²,

Liu³

et al. 2010

J Chromatograph Separat Techniq

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Section: On Line Assay Of Nifedipine In Plasma Samplementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation of a Novel Emulsion-Templated MIP Monolith and its Application for on Line Assay of Nifedipine in Human Plasma

Yang¹,

Liu²,

Liu³

et al. 2010

J Chromatograph Separat Techniq

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“…Conventional HIPEs are commonly stabilized by large amounts (5-50% relative to continuous phase) of suitable non-ionic surfactants due to the high internal volume fraction [4], which is not environmental friendly and is the most cost factor. Although great efforts have been done to eliminate or reducing the amount of the surfactant in the preparation of HIPEs, such as particle-stabilized and CTAB-stabilized HIPEs [5], HIPE stabilized by tiny non-ionic surfactant is still highly desired, due to the easy removal of the residue surfactant from the resulting porous materials. Besides, traditionally polymerization of HIPEs was initiated by heating the emulsion system.…”

Section: Introductionmentioning

confidence: 99%

Aligned Porous Beads Prepared by Frozen Polymerization of Emulsion-Templates Involving Tiny Emulsifier

et al. 2016

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Abstract. High internal phase emulsion (HIPE) templated porous materials are attracting increasing interests due to its high porosity and tunable structure. However, large amounts (5-50 vol%) of suitable non-ionic surfactants are commonly required to stabilize conventional HIPE due to the high internal volume fraction of HIPE. In this work, applying frozen polymerization in HIPE, aligned porous beads were prepared with tiny surfactant (~0.1 wt%). These interconnected aligned porous beads were prepared through directional freezing, and frozen ultraviolet (UV) initiation of an oil-in-water (o/w) HIPE. The HIPEs are extruded by needle, and then directionally frozen in liquid nitrogen to form beads. The frozen beads were exposed under UV irradiation in a -20 ºC ethanol bath to initiate the monomers in the aqueous phase. Moreover, the morphology of the resulting porous beads were tailored by vary the ratio of oil/water and the amount of emulsifier.

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“…These emulsions are important for a wide range of applications in the food, cosmetic, pharmaceutical, and petroleum industries [1,2]. Recently, increasing interests are attracted to use the emulsions as templates for the production of highly porous polymers (known as polyHIPEs) [3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Such materials are prepared by polymerizing the thin films that surround the droplets of the HIPEs if the continuous phase contains one or more monomeric species that are polymerizable.…”

Section: Introductionmentioning

confidence: 99%

Vinyl Ester Oligomer Crosslinked Porous Polymers Prepared via Surfactant‐Free High Internal Phase Emulsions

Zhu

Zhang

et al. 2012

Journal of Nanomaterials

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Using vinyl ester resin (VER) containing styrene (or methyl methacrylate) and vinyl ester oligomer (VEO) as external phase, Pickering high internal phase emulsions (Pickering HIPEs) having internal phase volume fraction of up to 95 vol% were prepared with copolymer particles as sole stabilizer. Polymerizing the external phase of these Pickering HIPEs led to porous polymers (polyPickering-HIPEs). Compared to the polystyrene-(PS-) based poly-Pickering-HIPEs which were prepared with mixture of styrene and divinylbenzene (DVB) as crosslinker, the poly-Pickering-HIPEs herein showed much higher elastic modulus and toughness. The elastic modulus of these poly-Pickering-HIPEs increased with increasing the VEO concentration in the external phase, while it decreased with increasing internal phase volume fraction. Increasing VEO concentration in the external phase also resulted in a decrease in the average void diameter as well as a narrow void diameter distribution of the resulting poly-Pickering-HIPEs. In addition, there were many small pores in the voids surface caused by the volume contraction of VER during the polymerization, which suggests a new method to fabricate porous polymers having a well-defined hierarchical pore structure.

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Stability of high internal phase emulsions with sole cationic surfactant and its tailoring morphology of porous polymers based on the emulsions

Cited by 60 publications

References 36 publications

Preparation of a Novel Emulsion-Templated MIP Monolith and its Application for on Line Assay of Nifedipine in Human Plasma

Preparation of a Novel Emulsion-Templated MIP Monolith and its Application for on Line Assay of Nifedipine in Human Plasma

Aligned Porous Beads Prepared by Frozen Polymerization of Emulsion-Templates Involving Tiny Emulsifier

Vinyl Ester Oligomer Crosslinked Porous Polymers Prepared via Surfactant‐Free High Internal Phase Emulsions

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