Facile Fabrication of Composite Electrospun Nanofibrous Matrices of Poly(ε-caprolactone)–Silica Based Pickering Emulsion

Samanta, Archana; Takkar, Sonam; Kulshreshtha, Ritu; Nandan, Bhanu; Srivastava, Rajiv K.

doi:10.1021/acs.langmuir.7b02119

Cited by 17 publications

(6 citation statements)

References 45 publications

(56 reference statements)

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“…Image (Db) was adapted with permission from Moglia et al (2011) , Copyright 2011 American Chemical Society. Image (Eb) was adapted with permission from Samanta et al (2017a) , Copyright 2017 American Chemical Society.…”

Section: Development Of the Emulsion Templated Scaffoldsmentioning

confidence: 99%

Basic Principles of Emulsion Templating and Its Use as an Emerging Manufacturing Method of Tissue Engineering Scaffolds

Dikici

Claeyssens

2020

Front. Bioeng. Biotechnol.

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Tissue engineering (TE) aims to regenerate critical size defects, which cannot heal naturally, by using highly porous matrices called TE scaffolds made of biocompatible and biodegradable materials. There are various manufacturing techniques commonly used to fabricate TE scaffolds. However, in most cases, they do not provide materials with a highly interconnected pore design. Thus, emulsion templating is a promising and convenient route for the fabrication of matrices with up to 99% porosity and high interconnectivity. These matrices have been used for various application areas for decades. Although this polymer structuring technique is older than TE itself, the use of polymerised internal phase emulsions (PolyHIPEs) in TE is relatively new compared to other scaffold manufacturing techniques. It is likely because it requires a multidisciplinary background including materials science, chemistry and TE although producing emulsion templated scaffolds is practically simple. To date, a number of excellent reviews on emulsion templating have been published by the pioneers in this field in order to explain the chemistry behind this technique and potential areas of use of the emulsion templated structures. This particular review focusses on the key points of how emulsion templated scaffolds can be fabricated for different TE applications. Accordingly, we first explain the basics of emulsion templating and characteristics of PolyHIPE scaffolds. Then, we discuss the role of each ingredient in the emulsion and the impact of the compositional changes and process conditions on the characteristics of PolyHIPEs. Afterward, current fabrication methods of biocompatible PolyHIPE scaffolds and polymerisation routes are detailed, and the functionalisation strategies that can be used to improve the biological activity of PolyHIPE scaffolds are discussed. Finally, the applications of PolyHIPEs on soft and hard TE as well as in vitro models and drug delivery in the literature are summarised.

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Section: Development Of the Emulsion Templated Scaffoldsmentioning

confidence: 99%

Basic Principles of Emulsion Templating and Its Use as an Emerging Manufacturing Method of Tissue Engineering Scaffolds

Dikici

Claeyssens

2020

Front. Bioeng. Biotechnol.

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“…Pickering emulsion is a two-phase system where immiscible dispersed and continuous phases are stabilized in the surfactant-free environment using solid inorganic or organic particles. − Pickering emulsion is an effective way to avoid use of synthetic non-eco-friendly surfactants and to incorporate nanoparticles in the polymeric matrix for better stabilization and functionalization. Pickering emulsions have been utilized to produce a functionalized nanofiber through emulsion electrospinning, which offers advantages such as restricted use of toxic organic solvents, high concentration of polymer solution as the electrospinning precursor, and multichannel fibrous morphologies. , The hydrophilic silica nanoparticles (SiO 2 ) have been explored as Pickering stabilizers to produce polymeric emulsions in the past. , In this report, an attempt was carried out to fabricate a crosslinked core sheath fibrous nanocomposite membrane through unique nGR Pickering emulsion. nGR emulsion electrospinning is a unique technique for producing crosslinked core sheath nanofibers directly from monomeric systems .…”

Section: Resultsmentioning

confidence: 99%

“…Pickering emulsions have been utilized to produce a functionalized nanofiber through emulsion electrospinning, which offers advantages such as restricted use of toxic organic solvents, high concentration of polymer solution as the electrospinning precursor, and multichannel fibrous morphologies. 49,50 The hydrophilic silica nanoparticles (SiO 2 ) have been explored as Pickering stabilizers to produce polymeric emulsions in the past. 51,52 In this report, an attempt was carried out to fabricate a crosslinked core sheath fibrous nanocomposite membrane through unique nGR Pickering emulsion.…”

Section: Pickering Emulsion and Membrane Preparationmentioning

confidence: 99%

Pickering Emulsion-Templated Nanocomposite Membranes for Excellent Demulsification and Oil–Water Separation

Gurave

Dubey

Nandan

et al. 2022

ACS Appl. Mater. Interfaces

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A worldwide steady increase in oily wastewater, due to oil spillage and various industrial discharges, requires immediate efforts toward development of an effective strategy and materials to preserve the natural water bodies. Designing a superwettable fibrous membrane of robust structure and anti-fouling property for efficient separation of oil-water mixtures and emulsions is therefore highly demanding. The electrospun fibrous membrane, which possesses porosity and flexibility and properties including superwettability and tunable functionality, can be considered as apposite materials for this cause. In this approach, we combined two strategies, viz., Pickering emulsion and near gel resin (nGR) emulsion electrospinning together to produce a fibrous nanocomposite membrane for efficient oil−water separation and demulsification. nGR Pickering emulsions were stabilized using hydrophilic SiO 2 nanoparticles and successfully optimized for fabricating the crosslinked core sheath-structured fibrous membrane. The prepared membrane provided twofold functionality due to the core sheath structure of the fibers. The crosslinked polystyrene core offered high oil adsorption capacity, whereas SiO 2 -functionalized crosslinked polyvinyl alcohol sheath provided a rough, superhydrophilic surface with underwater oleophobic behavior to the membrane. The optimized SiO 2 -Pickering emulsion-templated nanocomposite membrane demonstrated excellent underwater anti-oil adhesion behavior (UWOCA ∼148°) with efficient oil−water separation capacity of more than 99% and separation flux up to 3346 ± 91 L m −2 h −1 . The membrane was evaluated against various oil−water emulsions and found to have a superior separation efficiency. Moreover, excellent anti-oil adhesion property provided the intact membrane, where consistent separation performance was achieved up to 10 separation cycles without any loss. The membrane was used for separation of hot oil−water emulsions and showed no structural disintegration or loss in separation performance when exposed to elevated temperatures. The developed nanocomposite membranes could efficiently be used for separation and demulsification, and their applications can be explored in various other fields including selective sorption, catalysis, and storage in future.

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“…These hybrid materials can be engineered in such a way that could bring about electrical, optical, magnetic, or mechanical properties [6][7][8][9] while displaying various morphologies, including spherical, raspberry-like, snowman-like, or hollow microspheres [10][11][12][13]. Thus, these materials are successfully used in diverse application fields such as electronics, optics, biomedicine, catalysis, cosmetics, adsorption, and separation processes [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Silica-Supported Styrene-Co-Divinylbenzene Pickering Emulsion Polymerization: Tuning Surface Charge and Hydrophobicity by pH and Co-Aid Adsorption

2021

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In this work, polymerizations of styrene (St) in the presence of divinylbenzene (DVB) as a crosslinking agent and sodium 4-vinylbenzenesulfonate (VBS) have been performed in Pickering emulsions, using silica nanoparticles (SNps) as stabilizing agents and ammonium persulfate as a hydrophilic initiator. In oil-in-water Pickering emulsions with alkaline continuous phase (pH = 9) at 1, 2, and 3 wt% DVB (relative to St), polydisperse spheroid copolymer submicronic nanoparticles were obtained. Comparatively, polymerizations performed in Pickering emulsions with acidic continuous phase (pH = 5) allowed preparing St-co-DVB microspheres with core–shell structures at 1 wt% DVB and St-co-DVB hybrid monoliths with bi-continuous morphologies at 2 and 3 wt% DVB. It is noteworthy that this work reports Pickering emulsion polymerization as a new strategy for preparing hybrid percolated scaffolds with bi-continuous porosity. The proposed mechanisms originated by pH, DVB, and VBS and the drastic impact caused on the final morphology obtained, either hybrid particles or monoliths, are discussed herein.

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Facile Fabrication of Composite Electrospun Nanofibrous Matrices of Poly(ε-caprolactone)–Silica Based Pickering Emulsion

Cited by 17 publications

References 45 publications

Basic Principles of Emulsion Templating and Its Use as an Emerging Manufacturing Method of Tissue Engineering Scaffolds

Basic Principles of Emulsion Templating and Its Use as an Emerging Manufacturing Method of Tissue Engineering Scaffolds

Pickering Emulsion-Templated Nanocomposite Membranes for Excellent Demulsification and Oil–Water Separation

Silica-Supported Styrene-Co-Divinylbenzene Pickering Emulsion Polymerization: Tuning Surface Charge and Hydrophobicity by pH and Co-Aid Adsorption

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