The role of compound droplet size on transition from jetting to bubble entrapment during its impact on liquid

2021 ◽  
Vol 33 (10) ◽  
pp. 102103
Author(s):  
Anik Sarker ◽  
Manash Protim Boruah ◽  
Pitambar R. Randive ◽  
Sukumar Pati
Keyword(s):  
Droplet Size ◽  
Compound Droplet

HIGHLY CONCENTRATED EMULSIONS: ROLE OF DROPLET SIZE

2010 ◽  
Vol 198 (2) ◽  
pp. 147-171 ◽  
Author(s):  
H. A. Yakhoub ◽  
I. Masalova ◽  
R. Haldenwang
Keyword(s):  
Droplet Size ◽  
Concentrated Emulsions

The role of multiwall carbon nanotubes on physical, mechanical and rheological properties of poly(lactic acid)/natural rubber/CNT hybrid systems

2020 ◽  
pp. 096739112093135
Author(s):  
Mohammad Mahdi Salehi ◽  
Fatemeh Hakkak
Keyword(s):  
Lactic Acid ◽  
Natural Rubber ◽  
Rheological Properties ◽  
Droplet Size ◽  
Multiwall Carbon Nanotubes ◽  
Droplet Size Distribution ◽  
Hybrid Nanocomposites ◽  
Poly Lactic Acid ◽  
Melt Mixing

The main objective of the present work was to study the role of carbon nanotube (CNT) on the microstructure development and physical, mechanical, and rheological properties of poly(lactic acid) (PLA)/natural rubber (NR)/CNT hybrid nanocomposites. The PLA/NR blend samples with constant blend ratio (90/10) were prepared by melt mixing in a laboratory internal mixer at a temperature of 190°C. The behavior of the PLA/NR blend was examined depending on the CNT content (0.5–6 wt%). The droplet size and droplet size distribution of the NR phase decreases with the increase in CNTs content. This could be explained in terms of compatibilizing effect of CNT and the changing of the viscosity ratio of the blend phases. The development of the microstructure and the physical properties of the blend were also investigated according to the CNT contents by measuring the linear viscoelasticity. The elongational behavior and mechanical properties of the blends were strongly dependent on the location of the CNT. The CNT worked as an efficient compatibilizer and also it worked as a reinforcing filler making the matrix more rigid.

scholarly journals Preparation and Characterization of Water-Based Nano-Perfumes

Nanomaterials ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 981 ◽  
Author(s):  
Małgorzata Miastkowska ◽  
Elwira Lasoń ◽  
Elżbieta Sikora ◽  
Katarzyna Wolińska-Kennard
Keyword(s):  
Droplet Size ◽  
Interfacial Area ◽  
High Energy ◽  
Protective Role ◽  
Food Industries ◽  
Low Viscosity ◽  
Oil In Water ◽  
Water Based

The application of nanoemulsions as a novel delivery system for lipophilic materials, such as essential oils, flavors, and fragrances is one of the growing technologies used in cosmetic, pharmaceutical, and food industries. Their characteristic properties, like small droplet size with high interfacial area, transparent or semi-transparent appearance, low viscosity, and high kinetic stability, make them a perfect vehicle for fragrances, in the perfume industry. They could be a great alternative to water-based perfumes, without alcohol, and solve problems related to the oxidation and low bioavailability of fragrances with other non-alcoholic vehicles of perfumes like pomades or gels. The aim of our study was to develop stable Oil-in-Water (O/W) nanoemulsions that are compatible with selected fragrance compositions, without ethanol, polyols, and ionic surfactants, and to study their physicochemical, microbiological, and dermatological properties. The nano-perfume systems were obtained with a low-energy (Phase Inversion Composition; PIC) and with a high-energy (ultrasound, US) method, taking into account the possibility of moving from the laboratory scale to an industrial scale. The optimized nano-perfume formulations, prepared with different methods, yielded the same physicochemical properties (stability, medium droplet size of the inner phase, polydispersity, viscosity, surface tension, pH, density). Stable systems were obtained with a fragrance composition concentration within 6–15% range. These formulations had a low viscosity and a pH suitable for the skin. Moreover, the obtained results confirmed the protective role of nanoemulsions. The peroxide number measurement (POV) showed that the tested fragrance compositions had a high chemical stability. The results of the microbiological tests confirmed that the obtained products were free of microbiological contamination and were appropriately preserved. The dermatological test results confirmed the safety of the developed preparations.

scholarly journals The influence of temperature and arsenic molecular form at crystallization stage on the InAs nanostructure growth during droplet epitaxy

2021 ◽  
Vol 2086 (1) ◽  
pp. 012003
Author(s):  
N E Chernenko ◽  
S V Balakirev ◽  
M M Eremenko ◽  
M S Solodovnik
Keyword(s):  
Substrate Temperature ◽  
Droplet Size ◽  
Molecular Form ◽  
Experimental Studies ◽  
Droplet Epitaxy ◽  
Influence Of Temperature ◽  
Positive Effect ◽  
Crystallization Stage ◽  
Self Organizing

Abstract In this work, experimental studies of the influence of the arsenic molecular form (di-or tetramers) and substrate temperature on the crystallization of In/GaAs droplet nanostructures during droplet epitaxy have been carried out. We have shown the critical influence of the temperature and arsenic molecular form on the reproducibility of the characteristics of an array of self-organizing InAs nanostructures during crystallization. We also showed that a decrease in the initial In droplet size has a positive effect on the reproducibility of the parameters of the InAs nanostructures arrays. Our work also showed important role of substrate temperature at the crystallization stage.

scholarly journals Complexities in the First Aerosol Indirect Effect over the Southern Great Plains

2016 ◽  
Author(s):  
Sam Pennypacker ◽  
Allison L. Steiner
Keyword(s):  
Droplet Size ◽  
Great Plains ◽  
Optical Thickness ◽  
Indirect Effect ◽  
Meridional Flow ◽  
Ice Clouds ◽  
Southern Great Plains ◽  
Aerosol Loading ◽  
Cloud Optical Thickness

Abstract. The aerosol first indirect effect (FIE) is typically characterized by a reduction in cloud droplet size and an increase in cloud optical thickness in the presence of high concentrations of condensation nuclei. Past studies have derived observational evidence of the FIE in specific locations and conditions, yet critical uncertainties in the validity of this conceptual model as it applies to a range of cloud types and meteorological settings remain unaddressed. We utilize five years of surface aerosol measurements and Moderate Resolution Imaging Spectroradiometer (MODIS) observations of cloud properties to discern the FIE in springtime cloud statistics over the Southern Great Plains region of the United States. We extend this analysis to explore the role of three confounding factors: cloud phase, observational uncertainty and the role of regional meridional flow. While high aerosol days are dominated by smaller average droplet size in liquid clouds, the response of cloud optical thickness is variable and is dominantly a function of cloud water path. Ice clouds experience more variability in their response to high aerosol loading and satellite retrieval uncertainty thresholds. Finally, the direction of meridional flow does not play a large role in stratifying the cloud response to different aerosol loading. Overall, these observations show that much of the classical theory for liquid clouds is supported. Higher aerosol loadings are correlated with a reduction in effective radius and generally higher cloud optical thickness, and this relationship dominates over any driving influence from the low-level jet. However, for ice clouds we see a variable response that may be driven by aerosol composition and cold cloud microphysics. These observations provide further insight into the importance of considering deviations from the classic FIE in understanding regional variability in aerosol-cloud interactions in a continental setting.

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