Fabrication and characterization of microencapsulated PA with SiO2 shell through sol–gel synthesis via sodium silicate precursor

Pourmohamadian, Hossein; Sheikhzadeh, Ghanbar Ali; Rahimi‐Nasrabadi, Mehdi; Tabrizi, Hassan Basirat

doi:10.1007/s10854-017-6756-2

Cited by 15 publications

(5 citation statements)

References 42 publications

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“…Upon subsequent remelting, surface tension caused the molten fatty acid to remain entrapped within CB pores. This composite exhibited bulk minimal leakage at elevated temperatures when the CB mass fraction was 20% or greater (Figure B); curiously, CB provided greater form stability than activated carbon, despite the latter’s nominally higher surface area to volume ratio and prominent position in the PCM literature. , This encapsulation ratio of 20% is similar to or better than that reported for fatty acid composites with SiO 2 . − Such sol–gel synthesis typically resulted in composites with shell mass fractions of 10–60% while involving greater fabrication complexity than the direct-addition approach employed here. For hydrated salts, 5% CB with 10% CMC (a mass fraction comparable to that reported previously) achieved adequate form stability …”

Section: Resultssupporting

confidence: 55%

Multistage Chemical Heating for Instrument-Free Biosensing

Goertz

Colvin

Lippe

et al. 2018

ACS Appl. Mater. Interfaces

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Improving the portability of diagnostic medicine is crucial for alleviating global access-to-care deficiencies. This requires not only designing devices that are small and lightweight, but also autonomous and independent of electricity. Here, we present a strategy for conducting automated multistep diagnostic assays using chemically generated, passively regulated heat. Ligation and polymerization reagents for rolling circle amplification of nucleic acids are separated by meltable phase-change partitions, thus replacing precise manual reagent additions with automated partition melting. To actuate these barriers and individually initiate the various steps of the reaction, field ration heaters exothermically generate heat in a thermos, whereas fatty acids embedded in a carbonaceous matrix passively buffer the temperature around their melting points. Achieving multistage temperature profiles extend the capability of instrument-free diagnostic devices and improve the portability of reaction automation systems built around phase-change partitions.

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Section: Resultssupporting

confidence: 55%

Multistage Chemical Heating for Instrument-Free Biosensing

Goertz

Colvin

Lippe

et al. 2018

ACS Appl. Mater. Interfaces

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“…However, there are still limitations to the solubility and stability of curcumin although many methods such as liposome 45 , polymeric nanoparticles 46 , solid lipid nanoparticles (SLNs) 47 , albumin nanoparticles 48 , microemulsions and nanoemulsions 49 , nanospheres, and microcapsules 50 have been devised in recent years to obtain a higher aqueous solubility, bioavailability, activity, and lower toxicity 28,51 . In this regard, the emulsion method has received much attention in recent decades due to containing a simple synthesizing process and high efficiency, as well as requiring low costs, and eco-friendly materials [52][53][54][55][56] . This method has been exerted to synthesize water-insoluble substances 57,58 , oils 59,60 , plant extracts 61,62 , proteins 63 , nucleic acids 64 , curcumin, and many other substances 49 for drug delivery intentions, while some of these materials have been evaluated even in nanofiber scaffolds [65][66][67] .…”

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confidence: 99%

Synthesis of nano-fibers containing nano-curcumin in zein corn protein and its physicochemical and biological characteristics

Fereydouni

Movaffagh

Amiri

et al. 2021

Sci Rep

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Curcumin contains many biological activities as a natural bioactive substance, however, its low solubility stands as a huge bioavailability disadvantage. Recently, different methods have been developed for utilizing the tremendous medicinal properties of this material. In this study, an Oil/Water nano-emulsion of curcumin (Nano-CUR) has been woven in zein polymer at three percentages of 5%, 10%, and 15% (v/v). We have investigated the physicochemical properties of nanofibers (NFs) including FESEM, FTIR, tensile strength, encapsulation efficiency, and release profile, as well as biological properties. According to the data, the NFs have been observed to become significantly thinner and more uniformed as the involved percentage of Nano-CUR had been increased from 5 to 15%. It is considerable that the tensile strength can be increased by heightening the existing Nano-CUR from 5% towards 15%. The resultant NFs of zein/Nano-CUR 15% have exhibited higher in vitro release and lower encapsulation efficiency than the other evaluated zein/Nano-CUR NFs. It has been confirmed through the performed viability and antioxidant studies that zein/Nano-CUR 10% NFs are capable of providing the best conditions for cell proliferation. Considering the mentioned facts, this work has suggested that Nano-CUR can be successfully woven in zein NFs and maintain their biological properties.

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“…Nevertheless, the mPCMs showed a core/shell mass ratio and microcapsule efficiency, respectively, of 41.8 wt.% and 41.5%. A few years later, Pourmohamadian et al (2017) [156] microencapsulated PA with inorganic SiO 2 shell via the sol-gel method in alkaline medium via sodium silicate precursor. The optimum pH was found to be pH 11, were the sample had a perfect spherical shape with a smooth surface.…”

Section: Sol-gel Methodsmentioning

confidence: 99%

Methods for the Synthesis of Phase Change Material Microcapsules with Enhanced Thermophysical Properties—A State-of-the-Art Review

Al‐Shannaq

Farid

Ikutegbe

2022

Micro

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Thermal energy storage (TES) has been identified by many researchers as one of the cost-effective solutions for not only storing excess or/wasted energy, but also improving systems’ reliability and thermal efficiency. Among TES, phase change materials (PCMs) are gaining more attention due to their ability to store a reasonably large quantity of heat within small temperature differences. Encapsulation is the cornerstone in expanding the applicability of the PCMs. Microencapsulation is a proven, viable method for containment and retention of PCMs in tiny shells. Currently, there are numerous methods available for synthesis of mPCMs, each of which has its own advantages and limitations. This review aims to discuss, up to date, the different manufacturing approaches to preparing PCM microcapsules (mPCMs). The review also highlights the different potential approaches used for the enhancement of their thermophysical properties, including heat transfer enhancement, supercooling suppression, and shell mechanical strength. This article will help researchers and end users to better understand the current microencapsulation technologies and provide critical guidance for selecting the proper synthesis method and materials based on the required final product specifications.

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Fabrication and characterization of microencapsulated PA with SiO2 shell through sol–gel synthesis via sodium silicate precursor

Cited by 15 publications

References 42 publications

Multistage Chemical Heating for Instrument-Free Biosensing

Multistage Chemical Heating for Instrument-Free Biosensing

Synthesis of nano-fibers containing nano-curcumin in zein corn protein and its physicochemical and biological characteristics

Methods for the Synthesis of Phase Change Material Microcapsules with Enhanced Thermophysical Properties—A State-of-the-Art Review

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