The potential of magnetic heating for fabricating Pickering-emulsion-based capsules

Bielas, Rafał; Surdeko, Dawid; Kaczmarek, Katarzyna; Józefczak, Arkadiusz

doi:10.1016/j.colsurfb.2020.111070

Cited by 12 publications

(4 citation statements)

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“…110 For colloidal capsules with incorporated magnetite particles, the polymer shell strengthening was successfully performed with heating in the alternating magnetic field. 111 In case of submicron capsules prepared on the basis of the emulsion droplets stabilized by surface-modified gold nanoparticles, the shell reinforcement was carried out by chemical cross-linking (polymerization of olefinic bonds) induced by ultraviolet radiation. 112 Poly(methyl methacrylate) (PMMA) colloidal particles adsorbed onto the surface of water droplets were held together by van der Waals forces.…”

Section: Capsules With the Shell Composed Of Polymer Particlesmentioning

confidence: 99%

Polymeric capsules and micelles as promising carriers of anticancer drugs

Kubiak¹

2022

Polim. Med.

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Section: Capsules With the Shell Composed Of Polymer Particlesmentioning

confidence: 99%

Polymeric capsules and micelles as promising carriers of anticancer drugs

Kubiak¹

2022

Polim. Med.

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“…7−9 Furthermore, these magnetic nanosystems are strong candidates to solve problems from the most diverse industries 10,11 that make use of their unique properties. Also, the effect of magnetic hyperthermia (MH) has been investigated for other possible applications such as polymers with shape memory remotely activated by a magnetic field, 12,13 for fabricating Pickering emulsion-based capsules, 14,15 or even in the use of catalysts and microreactors. 16,17 One main promise regarding the application of magnetic NPs in biomedicine relates to their ability to convert electromagnetic field energy into heat, known as MH.…”

Section: ■ Introductionmentioning

confidence: 99%

“…After several decades of research, nanotechnology is increasingly becoming a reality in different areas of knowledge: health, environment, information technologies, and energy, among others. − In particular, magnetic nanoparticles (NPs) with superparamagnetic behavior play an important role in biomedical applications for cancer treatment, magnetic resonance imaging, and drug delivery, and nerve regeneration, for example. − Furthermore, these magnetic nanosystems are strong candidates to solve problems from the most diverse industries , that make use of their unique properties. Also, the effect of magnetic hyperthermia (MH) has been investigated for other possible applications such as polymers with shape memory remotely activated by a magnetic field, , for fabricating Pickering emulsion-based capsules, , or even in the use of catalysts and microreactors. , …”

Section: Introductionmentioning

confidence: 99%

Iron Oxide Nanoparticles in a Dynamic Flux: Implications for Magnetic Hyperthermia-Controlled Fluid Viscosity

Brollo

Pinheiro

Bassani³

et al. 2021

ACS Appl. Nano Mater.

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Magnetic hyperthermia (MH) is the phenomenon of increasing the temperature of a system with magnetic nanoparticles (NPs) subjected to an alternating magnetic field (AMF). This phenomenon occurs as the energy from the magnetic field is transformed into heat by mechanical (Brownian relaxation) and/or magnetic (Neél relaxation) magnetization reversal. In this work, we developed an experimental setup to test the use of MH for industrial applications. The liquid's viscosity decreases as the temperature increases, and liquids with high viscosity are present in several industries (e.g., O&G, pharmaceutical, chemical, and food), where a reduction in viscosity can translate into lower costs and greater profitability, for instance, in some industries, by decreasing the pressure drop and hence increasing the flow rate and in others by avoiding problems that occur at low temperature. Our pilot apparatus was built to investigate the hyperthermia effect when a mixture of viscous liquids and NPs, with an average size of 8 nm (transmission electron microscopy), flows through an AMF. In this study, three different configurations were tested, two static, with mixture samples of 1 and 100 mL, and one under dynamic flowing conditions. Two important results should be highlighted: (1) static experiments with 1 and 100 mL had similar SAR [W/g] values, demonstrating the viability of scaling up and (2) there was an increase in the temperature of the colloid flowing through the AMF. It was therefore possible to observe a clear increase in the liquid's temperature when subjected to an AMF, for all condition cases. The results suggest that this technology can be applied on an industrial scale by optimizing the coils and NP properties.

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“…The differences between Pickering and traditional emulsions are that pickering emulsion exhibits chemical and physical stabilization (Frelichowska et al, 2009). PES is stabilized by solid particles adsorption such as: CaCO3 nanoparticles (NPs) (Guo et al, 2021), clay (Lu et al, 2021), silica NPs (Griffith and Daigle, 2018), magnetic particles (Bielas et al, 2020), latex particles (with a positive charge) (Voorn, Ming, and Van Herk, 2006), biopolymer-based particles, and chitosan coated alginate (Dai et al, 2018b). As nontoxic, safe and environmentally friendly inorganic particles, silica is used in different applications.…”

Section: Introductionmentioning

confidence: 99%

Surface Modified Polymers and Nanoparticles for Enhanced Oil Recovery (EOR) Application

Al-Shatty¹

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The study to improve hydrocarbon recovery has attracted a great deal of research at-tention in many directions such as using chemical treatment or CO2 injection, and hydrocarbon fracking. The research trials are based on either studying a new approach to recovery or investigating the effect of injection agent treatments. Nanoparticles are a chemical addition that has promise in changing the reservoir properties through dif-ferent mechanisms such as: wettability alteration, reduce oil/water mobility, increase viscosity, disjoining pressure and interfacial tension reduction. In this thesis, alumina nanoparticles were modiﬁed with carboxylic acids to form different degrees of the hy-drophobicity. They were investigated as potential candidates for enhanced oil recov-ery applications. Surface modiﬁcation of alumina nanoparticles occurs at a molecular level. Consequently, applying these modiﬁcations for use as in the chemical treatment of Enhanced oil recovery (EOR) processes could change surface properties of oil, wa-ter, and rock. Thus, these modiﬁed alumina particles can act as a surface-active agent. Their increasing level of the hydrophobicity (depending on the type of carboxylic acid attached) and concentration shows a reduction in the interfacial tension (IFT) of hex-adecane oil. As a result, the ability to modify the degree of hydrophobicity makes them good candidates for EOR.Carboxylic acid-functionalized alumina nanoparticles (NPs) were tested as a poten-tial candidate for enhanced oil recovery. The NP’s size and shape in aqueous solution were investigated by dynamic light scattering (DLS) and small-angle neutron scatter-ing (SANS) as a function of the substituents: 2-[2-(2-methoxyethoxy)ethoxy]acetic acid (MEEA), and Octanoic acid (OCT). The viscosity and density of injected ﬂuids have been interpreted in terms of the NP’s chemical functionality. The inﬂuence of NPs hydrophobicity was observed in the size and oil removed from reservoir rock. The octanoic acid-functionalized alumina NPs is considered herein a good candidate for applications in oil recovery.The evaluation of the mechanism of nanoparticles/surfactant complex adsorption at the critical oil/water interface was studied with a sophisticated technique (Neutron Reﬂectometry) to give insight on nanoparticles/oil interactions in oil recovery systems. Here, the adsorption of two modiﬁed alumina nanoparticles with different degrees of hydrophobicity (hydrophilic 2-[2-(2-methoxyethoxy) ethoxy] acetic acid (MEEA), and hydrophobic octanoic acid (OCT)) stabilized with 2 different surfactants, were studied at oil/water interface. A thin layer of deuterated (D) and hydrogenated (H) hexade-cane (contrast matching Silicon substrate) oil was formed on a silicon block by a spin coating freeze process. The distribution of the NPs across the oil/water interface with CTAB surfactant is similar between the two systems. NPs coated with CTAB have more afﬁnity towards the oil/water interface, which explains the oil recovery increase by around 5% when ﬂooding the core with OCT-NP/CTAB system compared to the surfactant ﬂooding alone. These results suggest that NPs/surfactant complexes can have potential usage in EOR recovery applications.Chapter four addresses the challenge of the O/W Pickering emulsion formed with un/modiﬁed alumina nanoparticles adsorbed with surfactants showing longer stabil-ity. Alumina nanoparticles were modiﬁed by different carboxylic acids to acquire the different degrees of hydrophobicity. Dynamic light scattering and optical mi-croscopy measurements were then performed to characterize the aggregation behaviour of alumina-NP/surfactant’s mixture in an aqueous solution. The long-term stability of pickering emulsion stabilized by alumina modiﬁed nanoparticles was investigated di-rectly after each time interval: 5 min, 1 hour, 1 week, and 1 month. The result indicated that adjusting the amount of modiﬁed alumina nanoparticles and surfactants could be a suitable means for manipulating the stability of nanoparticles-surfactant based pick-ering emulsions. This would serve as a great application prospect for the preparation of pickering emulsion stabilized by eco-friendly nanoparticles (both MEEA and OCT) and surfactants.The synthesis and characterization of two new families of amphiphilic graft copoly-mers (AGCs) are reported. The graft polymers were synthesized using the various molecular weight of polyethylene glycol (PEG) (as hydrophilic graft chains) and two different hydrophobic backbones (with a varied quantity of functional groups) using a “graft onto” technique. FTIR and 1H NMR characterizations were used to indicate and validate the synthesis of grafted copolymers. The length of the PEG was observed to correlate with the hydrophilic ratio. Increasing the chain length of PEG was ob-served to increase the hydrophilicity ratio (more grafted PEG more hydrophilic). Con-sequently, both hydrophobic backbones wettability (⇠ 90 - 110◦) altered upon grafting onto synthesis and the contact angle data showed that the higher molecular weightof grafted chains led to higher hydrophilicity of grafted polymers (∼ 11 - 65◦). The critical micelle concentrations (CMC) and surface activity (SFT) of AGCs in water were determined by the surface tension technique via the shape analyser (pendant drop method). It revealed that these polymers can act as polymeric surfactants with CMC of around 2-3 wt.%. Small-angle neutron (SANS) was used to examine the confor-mation of the AGCs in aqueous solutions which displayed the formation of ellipsoidal core-shell micelles. This research provides fundamental understandings of potentially important polymeric materials with a variety of applications from emulsiﬁers and drug carriers to enhance oil recovery additives.The synergetic effect of combing low salinity water with polymer injection meth-ods (polymer ﬂooding) is a promising technique for oil displacement (enhanced oil recovery) (EOR). The objective of this study was to investigate the effect of newly synthesized amphiphilic polymers on two potential applications: oil displacement and stabilized emulsion. To successfully displace the oil within the tested reservoir rock, the optimal concentration of NaCl ions was determined to be 1 wt.% in the low salinity polymer. To evaluate aggregation behaviour, the conformational change of the grafted polymers/amphiphilic polymers resulting from the effect of salt/NaCl addition was investigated by Small-angle X-ray scattering (SAXS). The polymers displayed an el-lipsoidal core-shell micelles conformation. The copolymers with higher hydrophilic grafts had lower emulsion stability due to the size of the aggregation particles being smaller, despite having higher oil recovery capability. These ﬁndings have a signiﬁcant potential impact on the oil industry which is to counteract current hazardous methods and overcome the high salinity environment of EOR.

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The potential of magnetic heating for fabricating Pickering-emulsion-based capsules

Cited by 12 publications

References 53 publications

Polymeric capsules and micelles as promising carriers of anticancer drugs

Polymeric capsules and micelles as promising carriers of anticancer drugs

Iron Oxide Nanoparticles in a Dynamic Flux: Implications for Magnetic Hyperthermia-Controlled Fluid Viscosity

Surface Modified Polymers and Nanoparticles for Enhanced Oil Recovery (EOR) Application

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