Multifunctional PDMS polyHIPE filters for oil-water separation and antibacterial activity

Vásquez, Lía; Davis, Alexander; Gatto, Francesca; An, Mai Ngoc; Drago, Filippo; Pompa, Pier Paolo; Athanassiou, Athanassia; Fragouli, Despina

doi:10.1016/j.seppur.2020.117748

Cited by 29 publications

(12 citation statements)

References 77 publications

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“…PolyHIPEs have a hierarchically porous structure consisting of primary pores (cavities) and secondary, interconnecting pores ( Figure 2 ). Both the chemical variety and the high porosity variety enable the formation of materials for specific applications, for instance, water clean-up [ 19 ], absorption and adsorption [ 20 , 21 ], separation processes [ 22 , 23 ], controlled release matrices [ 24 ] and tissue engineering [ 25 ]. Another aspect that makes polyHIPEs attractive is the available polymerisation techniques, such as atom transfer radical polymerisation (ATRP) [ 26 ], free-radical polymerisation (FRP) [ 27 ], reversible-addition-fragmentation chain-transfer (RAFT) [ 28 ], ring opening metathesis polymerisation (ROMP) [ 29 ] and click polymerisation [ 30 ], to name a few.…”

Section: Introductionmentioning

confidence: 99%

Porous Polymers from High Internal Phase Emulsions as Scaffolds for Biological Applications

2021

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High internal phase emulsions (HIPEs), with densely packed droplets of internal phase and monomers dispersed in the continuous phase, are now an established medium for porous polymer preparation (polyHIPEs). The ability to influence the pore size and interconnectivity, together with the process scalability and a wide spectrum of possible chemistries are important advantages of polyHIPEs. In this review, the focus on the biomedical applications of polyHIPEs is emphasised, in particular the applications of polyHIPEs as scaffolds/supports for biological cell growth, proliferation and tissue (re)generation. An overview of the polyHIPE preparation methodology is given and possibilities of morphology tuning are outlined. In the continuation, polyHIPEs with different chemistries and their interaction with biological systems are described. A further focus is given to combined techniques and advanced applications.

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Section: Introductionmentioning

confidence: 99%

Porous Polymers from High Internal Phase Emulsions as Scaffolds for Biological Applications

2021

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“…The use of porous polymeric materials has expanded to a wide variety of applications including sensors, solid phase synthesis, membrane processes, catalysis and biomedical applications [ 1 , 2 , 3 ]. Emulsion templating is a fabrication strategy that can be used to produce highly porous polymeric materials for these applications.…”

Section: Introductionmentioning

confidence: 99%

Engineering Toolbox for Systematic Design of PolyHIPE Architecture

et al. 2021

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Polymerization of high internal phase emulsions (polyHIPEs) is a well-established method for the production of high porosity foams. Researchers are often regulated to using a time-intensive trial and error approach to achieve target pore architectures. In this work, we performed a systematic study to identify the relative effects of common emulsion parameters on pore architecture (mixing speed, surfactant concentration, organic phase viscosity, molecular hydrophobicity). Across different macromer chemistries, the largest magnitude of change in pore size was observed across surfactant concentration (~6 fold, 5–20 wt%), whereas changing mixing speeds (~4 fold, 500–2000 RPM) displayed a reduced effect. Furthermore, it was observed that organic phase viscosity had a marked effect on pore size (~4 fold, 6–170 cP) with no clear trend observed with molecular hydrophobicity in this range (logP = 1.9–4.4). The efficacy of 1,4-butanedithiol as a reactive diluent was demonstrated and provides a means to reduce organic phase viscosity and increase pore size without affecting polymer fraction of the resulting foam. Overall, this systematic study of the microarchitectural effects of these macromers and processing variables provides a framework for the rational design of polyHIPE architectures that can be used to accelerate design and meet application needs across many sectors.

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“…To overcome these limitations, in addition to PCM microcapsules, − the application of shape-stable porous materials as a PCM carrier has received great interest in the literature. − To date, porous clay, mineral-based materials, metallic foams, porous carbon, and porous polymers , are the most commonly used framework materials for shape-stabilized PCM. High internal phase emulsion templated polymers (PHP) as porous polymers have been used in a wide variety of applications such as adsorption, , purification, , separation, controlled release, , and scaffolding, and there is limited research in energy storage application. , Recently, porous PHP foams have begun to gain attention for the stabilization of PCMs owing to their superior features such as shape stabilization, enclosure ability, high loading rate, excellent structural stability, and interpenetrating pore morphology. − PHPs are monolithic, controllable, highly porous polymers with low density, high specific surface area, highly cross-linked polymer matrix, the porosity of which is created by the continuous phase of emulsions. PHPs in particular stand out for their large gaps bounded by small windows on the skeleton.…”

Section: Introductionmentioning

confidence: 99%

CuO Nanoparticle@Polystyrene Hierarchical Porous Foam for the Effective Encapsulation of Octadecanol as a Phase Changing Thermal Energy Storage Material

2022

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CuO nanoparticle-doped hierarchical porous polymeric frameworks can be used for shape stability of octadecanol (OD) as a phase change material (PCM) for latent heat energy storage (LHTES) applications. A hierarchical porous foam polymer was synthesized by high internal phase emulsion polymerization of styrene and divinylbenzene doped with/without CuO. The synthesized high internal phase templated polymers (PHPs) with hierarchical pores were capable of absorbing up to 75 wt % OD without seepage behavior. The morphological, structural, and thermal behavior of PHPs/OD and PHPs@CuO/OD composite PCMs was determined using scanning electron microscopy (SEM)/energy-dispersive X-ray analysis (EDX), Brunauer–Emmett–Teller (BET) surface area analyses, Fourier transform infrared spectrophotometry (FT-IR), differential scanning calorimetry (DSC) analysis, and thermogravimetric analysis. Thermal analysis results revealed that PHP containing 75 wt % OD has an LHTES capacity of 190.4–194.0 J/g in the temperature range of 52.0–53.0 °C. The chemical and thermal stabilities of the developed composite PCMs were tested with repetitive thermal cycles. After 0.25 wt % CuO nanoparticle doping, the thermal conductivity of the composite PCM increased up to 86 and 17% compared to PHP and pure OD, respectively. Heat storage/releasing times of PHP@CuO/OD reduced about 20–22% relative to those of PHP/OD because of improved thermal conductivity. The thermal stability of PHP/OD and PHP@CuO/OD composites increased from 196 to 278 °C and 251 °C, respectively, compared to pure OD. The results exposed that especially PHP@CuO/OD composite PCMs are good candidates for LHTES applications because of their considerably high LHTES capacity.

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Multifunctional PDMS polyHIPE filters for oil-water separation and antibacterial activity

Cited by 29 publications

References 77 publications

Porous Polymers from High Internal Phase Emulsions as Scaffolds for Biological Applications

Porous Polymers from High Internal Phase Emulsions as Scaffolds for Biological Applications

Engineering Toolbox for Systematic Design of PolyHIPE Architecture

CuO Nanoparticle@Polystyrene Hierarchical Porous Foam for the Effective Encapsulation of Octadecanol as a Phase Changing Thermal Energy Storage Material

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