Kinetic and thermodynamic correlation for prediction of morphology of nanocapsules with hydrophobic core via miniemulsion polymerization

Shirin‐Abadi, Abbas Rezaee; Khoee, Sepideh; Rahim-abadi, Meysam Maleki; Mahdavian, Ali Reza

doi:10.1016/j.colsurfa.2014.08.009

Cited by 13 publications

(6 citation statements)

References 21 publications

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“…Almost all monomer droplets are directly converted into particles by monomer droplet nucleation, which makes miniemulsion polymerization quite attractive as a convenient one-step nanoencapsulation method. [29] Christian [30] encapsulated a fragrant compound by emulsion polymerization to achieve the slow, sustained release of an active ingredient. Unilever PLC…”

Section: Introductionmentioning

confidence: 99%

Preparation and characteristics of nanocapsules containing essential oil for textile application

Cong

Liang

Shi

et al. 2015

Flavour & Fragrance J

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Methyl methacrylate (MMA)-styrene (St) copolymer nanocapsules containing cologne essential oil for fragrant fabrics treatment were prepared by miniemulsion polymerization. The morphology, chemical composition and thermal properties were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR) and thermal gravimetric analysis (TGA). The nanocapsules had relatively small size (ca. 136 nm of mean particle diameter), regular sphericity and uniform particle size distribution. The encapsulation efficiency and loading capacity of the nanocapsules were 85.4% and 42.7%, respectively. The nanocapsules had good thermostability. The release experiments showed that 6.8% cologne essential oil still existed after being washed 15 times in the fabrics treated with nanocapsules, indicating that the fabrics treated with nanocapsules had good washing durability.

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Section: Introductionmentioning

confidence: 99%

Preparation and characteristics of nanocapsules containing essential oil for textile application

Cong

Liang

Shi

et al. 2015

Flavour & Fragrance J

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“…At last, NPCM slurry at three concentrations of 5, 10, and 20 g/L were prepared. As investigated by Shirin‐Abadi et al 40 the NPCM slurry prepared by the miniemulsion method has good stability in water and no aggregation was observed in the slurry, even after several weeks.…”

Section: Experimental Partmentioning

confidence: 98%

The impacts of utilizing nano‐encapsulated PCM along with RGO nanosheets in a pulsating heat pipe, a comparative study

et al. 2021

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Summary Heat pipes are useful devices in heat transfer and particularly, in cooling systems. Given the high demand for cooling systems in various applications, an improvement in the performance of heat pipes has gained much attraction in recent years. In this study, the effects of utilizing working fluids with different thermal properties on the performance of pulsating heat pipes (PHP) are experimentally studied. Hence, nano‐encapsulated phase change material (NPCM), reduced graphene oxide nanosheets, and their mixture, as a novel hybrid nanofluid, are prepared and dispersed in water as a working fluid. NPCM at 3 concentrations of 5, 10, and 20 g/L, as well as nanosheets at three concentrations of 0.3, 0.6, and 1.2 g/L, are synthesized and investigated. Moreover, both additives are mixed at five various concentrations to form a hybrid nanofluid. All experiments are conducted in the vertical orientation and filling ratio of 50%. It is found that due to the increase in viscosity with the increment of concentration, the highest concentration is not always the optimum concentration and the PHP's performance for each additive is optimized in a specific concentration. NPCMs could prevent the working fluid's temperature to rise by changing the phase, as a result, the effective specific heat of the working fluid is slightly augmented. Also, the thermal conductivity of the working fluid increased up to 13% using nanosheets. It is illustrated that using the mixture of nanosheets and NPCM leads to a 38% decline in thermal resistance. Meanwhile, it is found that the enhancement in the thermal performance of the PHP using nanofluids is not only purely due to the increase in thermal properties of nanofluids but also due to the increase in turbulence intensity and boiling nucleation sites created by the nanoparticles. Highlights Nano‐encapsulated phase change material (PCM), reduced graphene oxide (RGO) nanosheets, and their mixture are used as working fluid in a pulsating heat pipe (PHP). The thermal performance of PHP is improved using PCM nanocapsules, RGO nanosheets, and their mixture. Nanosheets have a higher impact on the performance of PHP compared with nano‐encapsulated PCM. The better performance of PHP using RGO nanosheets is due to the higher thermal conductivity and mixing of fluid containing them compared with pure water. The better performance of PHP using nanocapsules is attributed to the better mixing of the fluid.

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“…Phase change materials (PCMs) are considerable functional materials in energy saving and thermal regulating products as they have capability of storing and releasing energy . Therefore, incorporating PCMs in textiles is a useful technique to upgrade them to thermal regulating products .…”

Section: Introductionmentioning

confidence: 99%

Modeling and optimization of waterproof‐breathable thermo‐regulating core‐shell nanofiber/net structured membrane for protective clothing applications

Rahimi

Mokhtari

2018

Polymer Engineering & Sci

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The mechanical and functional properties of thermo‐regulating hexadecane‐polyurethane (HD‐PU) nanofiber/net membrane (NFNM) with potential application in protective clothing were modeled and optimized. The optimum conditions for fabrication of the HD‐PU NFNM were obtained using response surface methodology (RSM). Central composite design (CCD) matrix was employed to develop predictive regression models along with optimize and investigate the effects of important parameters such as PU and surfactant concentrations, and co‐electrospinning time, on the responses. Mechanical and functional properties of protective membranes including strength, elongation, water vapor transmission rate (WVTR), hydrostatic pressure, air permeability, and enthalpy of fusion were optimized as responses. As a result, higher NFNM strength was observed by increasing PU and surfactant concentrations. Thermal regulating efficiency (TRE) or HD loading amount for optimized NFNM was calculated using the results of RSM and experimental data, and it was obtained as 28% and 24%, respectively. Therefore, remarkable agreement with errors lower than 12% between predicted and experimental values was achieved. According to our findings, NFNM characteristics can be improved under controlled conditions and RSM is an efficient method to predict and optimize these conditions. POLYM. ENG. SCI., 58:1756–1765, 2018. © 2018 Society of Plastics Engineers

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Kinetic and thermodynamic correlation for prediction of morphology of nanocapsules with hydrophobic core via miniemulsion polymerization

Cited by 13 publications

References 21 publications

Preparation and characteristics of nanocapsules containing essential oil for textile application

Preparation and characteristics of nanocapsules containing essential oil for textile application

The impacts of utilizing nano‐encapsulated PCM along with RGO nanosheets in a pulsating heat pipe, a comparative study

Modeling and optimization of waterproof‐breathable thermo‐regulating core‐shell nanofiber/net structured membrane for protective clothing applications

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