Effects of viscosity, surface tension, and evaporation rate of solvent on dry colloidal structures: A lattice Boltzmann study

Munekata, Toshihisa; Suzuki, Tomomichi; Yamakawa, Satoko; Asahi, Ryoji

doi:10.1103/physreve.88.052314

Cited by 22 publications

(14 citation statements)

References 28 publications

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“…The thermogravimetric analysis (TGA) is a suitable alternative method in determining the drying rate of a solution as measured through sample weight loss during a drying process [ 31 ]. The drying rate is affected by the viscosity of a fluid and the rate of evaporation of a solvent [ 46 ]. In this study, four ink samples tested exhibited low, moderate, high, and optimum color lightness and viscosity properties.…”

Section: Resultsmentioning

confidence: 99%

Novel Mangosteen-Leaves-Based Marker Ink: Color Lightness, Viscosity, Optimized Composition, and Microstructural Analysis

et al. 2021

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Dry mangosteen leaves are one of the raw materials used to produce marker ink. However, research using this free and abundant resource is rather limited. The less efficient one-factor-at-a-time (OFAT) approach was mostly used in past studies on plant-based marker ink. The use of statistical analysis and the regression coefficient model (mathematical model) was considered essential in predicting the best combination of factors in formulating mangosteen leaf-based marker ink. Ideally, ink should have maximum color lightness, minimum viscosity, and fast-drying speed. The objective of this study to study the effect of glycerol and carboxymethyl cellulose (CMC) on the color lightness and viscosity of mangosteen-leaves-based marker ink. The viscosity, color lightness, and drying properties of the ink were tested, the significant effect of glycerol and CMC (responses) on ink properties was identified and the prediction model on the optimum value of the responses was developed by using response surface methodology (RSM). The microstructure of mangosteen leaves was analyzed to study the surface morphology and cell structure during dye extraction. A low amount of glycerol used was found to increase the value of color lightness. A decrease in CMC amounts resulted in low viscosity of marker ink. The optimum formulation for the ink can be achieved when the weight percents of glycerol, benzalkonium chloride, ferrous sulphate, and CMC are set at 5, 5, 1, and 3, respectively. SEM micrographs showed the greatest amount of cell wall structure collapse on samples boiled with the lowest amount of glycerol.

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Section: Resultsmentioning

confidence: 99%

Novel Mangosteen-Leaves-Based Marker Ink: Color Lightness, Viscosity, Optimized Composition, and Microstructural Analysis

et al. 2021

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“…evaporation rate, viscosity, surface tension, CTAB concentration, GNRDs average diameter) only, resulting in the formation of repeating lines and the superstructure’s self-replication. [ 72 ] Self-replication is used in the sense that structures (i.e. in our case simple straight lines) are forming in parallel to already formed similar structures without the need of additional lithographic steps.…”

Section: Resultsmentioning

confidence: 99%

Linear self-assembly and grafting of gold nanorods into arrayed micrometer-long nanowires on a silicon wafer via a combined top-down/bottom-up approach

Lestini¹,

Andrei²,

Zerulla³

2018

PLoS ONE

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Macroscopically long wire-like arrangements of gold nanoparticles were obtained by controlled evaporation and partial coalescence of an aqueous colloidal solution of capped CTAB-Au nanorods onto a functionalised 3-mercaptopropyl trimethoxysilane (MPTMS) silicon substrate, using a removable, silicon wafer with a hydrophobic surface that serves as a “handrail” for the initial nanorods’ linear self-assembly. The wire-like structures display a quasi-continuous pattern by thermal annealing of the gold nanorods when the solvent (i.e. water) is evaporated at temperatures rising from 20°C to 140°C. Formation of both single and self-replicating parallel 1D-superstructures consisting of two or even three wires is observed and explained under such conditions.

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“…Effect of concentration of surfactant in secondary emulsion was significant that upon increase in its concentration, the drug release was observed to be decreased. As the amount of surfactant increases, the outer volatile organic phase (Chloroform) of primary emulsion might interact more with the external aqueous phase that lead to a decrease in the rate of evaporation which finally resulted in nanocapsules with a more rigid membrane 10,33 so that the drug release rate got decreased. The concentration of glycerol in the external phase significantly influenced the release rate of TDF from the PLGA-TDF-NCs as the drug release was observed to be decreased upon increase in the concentration of glycerol.…”

Section: In Vitro Drug Release Studiesmentioning

confidence: 99%

“…This might be because of the increase in viscosity at higher concentrations of glycerol that might decrease the evaporation of chloroform. The nanocapsules obtained by slow evaporation rates might have the polymer membrane rigid with less porosity, 33 which could reduce the rate of drug release from them. Effects of all the three factors was found to be significant at p<0.05 (shown in Table 5).…”

Section: In Vitro Drug Release Studiesmentioning

confidence: 99%

Tenofovir Loaded Poly (Lactide-Co-Glycolide) Nanocapsules: Formulation Optimization by Desirability Functions Approach

Srikar¹,

Rani²

2020

IJPER

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Background: Nanoparticles made of biodegradable polymers are the most effective colloidal drug delivery systems. The in vitro characteristics as well as in vivo presentation of these nanoparticles are majorly influenced by their formulation parameters. Objectives: The principle objective of the work was to optimize various critical formulation parameters by using statistical tools in order to develop poly (lactide-co-glycolide) (PLGA) nanocapsules loaded with tenofovir disoproxil fumarate (TDF) with effective characteristic properties. Methodology: In this work, biodegradable nanocapsules with PLGA for TDF were prepared by modified double emulsification technique. Concentration of PLGA, concentration of Pluronic F-68 in secondary emulsion and concentration of glycerol in external phase were selected as the formulation factors hence, a 3 3 full factorial design in response surface methodology was chosen as an experimental design. The prepared nanocapsules were evaluated for various characteristic properties like particle size, surface morphology, entrapment efficiency, drug release studies and DSC studies. The selected formulation parameters were optimized by a mathematical model called desirability functions approach with the set desirability of high entrapment efficiency, low drug release constant and less particle size. Results and Conclusion: Particle size, entrapment efficiency and drug release constant were found in the ranges of 249.3-376.3nm, 20.95-71.35% and 0.039-0.184 hr -1 . These selected formulation parameters were found to have significant (at p < 0.05 by ANOVA) influence on various characteristics of prepared nanocapsules. The optimized formulation found to have 63.08% of entrapment efficiency, 284.53 nm of particle size with zeta potential of -26.1 mV and 0.054 h -1 of release rate constant.

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Effects of viscosity, surface tension, and evaporation rate of solvent on dry colloidal structures: A lattice Boltzmann study

Cited by 22 publications

References 28 publications

Novel Mangosteen-Leaves-Based Marker Ink: Color Lightness, Viscosity, Optimized Composition, and Microstructural Analysis

Novel Mangosteen-Leaves-Based Marker Ink: Color Lightness, Viscosity, Optimized Composition, and Microstructural Analysis

Linear self-assembly and grafting of gold nanorods into arrayed micrometer-long nanowires on a silicon wafer via a combined top-down/bottom-up approach

Tenofovir Loaded Poly (Lactide-Co-Glycolide) Nanocapsules: Formulation Optimization by Desirability Functions Approach

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