Dispersibility and Storage Stability Optimization of High …

Dispersibility and Storage Stability Optimization of High Dose Isoniazid Dry Powder Inhalation Formulations with L-Leucine or Trileucine ... The improved moisture protection and dispersibility obtained with trileucine are explained by its amorphous nature and a higher surface enrichment during drying. Dispersion efficiency …

Esterified styrene-maleic anhydride ester …

the formation of modied E-MWCNTs dispersion with excellent dispersibility and long storage stabil-ity in N-methylpyrrolidone (NMP). The analysis of transmittance spectroscopy, absorption spectros-copy, sedimentation photo, and transmittance elec-tron microscopy (TEM) conrms that the modied E-MWCNT …

Dispersion and individualization of boron nitride nanotubes

Boron nitride nanotubes (BNNTs) have attracted significant attention due to their outstanding properties such as high thermal stability, high tensile strength, and light weight. The use of BNNTs to generate macroscopic materials and composites, as well as their use in biological and electronic applications require their effective dispersion in a …

Study on the surface energies and dispersibility of graphene …

As mentioned above, we found that all four samples show a good dispersibility only in dimethylsulfoxide (DMSO), N-methyl-2-pyrrolidone (NMP), and DMF during our dispersion test experiments. It suggests that a necessary but not sufficient condition of the solvents should be considerably polar and high dipole moment for …

Dispersibility

Dispersibility, generally defined as a uniform distribution in solution, not to be confused with solubility, is an important factor for both biomaterials and biomedical applications, …

Investigation of nanoparticle dispersibility and stability …

The dispersibility and stability of the NP dispersion were measured by SMLS, DLS, SEM, and ELS. The measurands associated with these techniques are reported in Table 2 . As stated in the introduction, dispersibility can be characterized by measuring the initial mean size or particle size distribution and the homogeneity of the …

Green modification of graphene dispersion with high …

Green modification of graphene dispersion with high nanosheet content, good dispersibility, and long storage stability Minghua Li, *abc Xiaoyu Lu,ab Jiajia Jiang,ab Lei Gao,ab Jie Gaoab and Dongming Jiangab In this work, an easy, green, noncovalent surface modification of pristine graphene (GR) was carried out

Preparation and characterization of water-based

So, the CNTs individuals oxidized in the absence of light possessed high dispersibility and stability as varying pH value from 11.5 to 4, which slurry concentration is 10 wt% and no CNTs settlement was observed for nearly one year. ... The dispersion of concentrated MCNTs slurry with different acidity and alkalinity was studied. It is found ...

Dispersion stability of titanium dioxide in aqueous

Two polymer dispersants, polyester dispersant (PD) and sodium polyacrylate (NaPAA), were used to disperse titanium dioxide in 10% aqueous isopropyl alcohol (IPA). The effect of pH and zeta potential on the dispersibility of the titanium dioxide (TiO2) was studied via sedimentation. An optimum pH value of 8 for the two …

Green modification of graphene dispersion with high …

Green modification of graphene dispersion with high nanosheet content, good dispersibility, and long storage stability RSC Adv. 2022 Feb 18;12(10 ... zeta potential and transmittance electron microscopy (TEM) images reveal that the modified CGR has a high degree of dispersion. More importantly, the pristine GR is insoluble, …

The dispersion mechanism of dispersive seasonally frozen …

Because of the strong dispersibility of this soil, irrigation channels and other water conservation projects are often damaged or even destroyed by erosion. ... The large CEC, large ESP, and low clay mineral content provided the material basis for soil dispersion, while the high pH provided the environmental conditions for soil …

Study on the preparation and characterization of high …

Abstract. This article reports on experiments aimed at modifying nanosilica powder by adding a silane coupling agent, KH570, to achieve high dispersibility and …

Filler Dispersion and Filler Networks | SpringerLink

The most common way of evaluating macro-dispersion as an indicator of the efficiency of mixing is the use of light-optical microscopy in reflection mode on a freshly cut rubber surface, as described in international standards [5–7].Both ASTM D2663-08 (method A) and ISO 11345:2006 specify qualitative methods in reflected light for the comparative …

Green modification of single-walled carbon nanotubes dispersion …

The dispersibility of CNT dispersion with the PVP, evaluated via viscosity and particle size analyses, are superior to those with the DOC and NaDDBS dispersing agents.

Preparation of mesostructured barium sulfate with high …

This reveals that the high dispersibility of the powder in ethylene glycol might be related to the mesopores of the particles and the high rate of adsorption of ethylene glycol onto their surfaces. Download : Download full-size image; Fig. 4. TEM images of mesoporous BaSO 4 nanomaterials: (a) BaSO 4-Dried, (b) BaSO 4-400D and …

Green modification of graphene dispersion with high …

Green modification of graphene dispersion with high nanosheet content, good dispersibility, and long storage stability M. Li, X. Lu, J. Jiang, L. Gao, J. Gao and D. Jiang, RSC Adv., 2022, 12, 6037 DOI: 10.1039/D1RA08520D This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.

Evaluation of carbon nanotubes dispersion in aqueous …

The dispersibility of CNT dispersion with the PVP, evaluated via viscosity and particle size analyses, are superior to those with the DOC and NaDDBS dispersing …

Investigation of factors affecting the dispersibility of clays …

This dispersion phenomenon might occur in a settlement crack, hydraulic fracture or in other high permeability channels. For this reason, the use of dispersive clays for hydraulic structures, ... (1997) Comparative study on physical tests of dispersibility of soils used for earth fill dams in Turkey. ASTM Geotech Test J 20(2):242–251 ...

Using analytical centrifugation to characterize the dispersibility …

A low initial slope indicates a low sedimentation rate during the measurement period, corresponding to a coating with high dispersibility . ... We used a LUMiSizer® analytical centrifuge with STEP technology to determine the particle dispersion and size distribution of multisample organic/inorganic composite coatings. The stability of the ...

High‐Conductivity–Dispersibility Graphene Made by …

Despite the progress made on the production of graphene using liquid-phase exfoliation methods, the fabrication of graphene with both high conductivity and dispersibility remains challenging. Through catalytic exfoliation of graphite, an effective synthesis method for graphene with large lateral size (≈10 µm), high conductivity (926 …

Carbon Nanotubes: Dispersion Challenge and How to …

High shear mixing is applicable for particle dispersion both in melt and solution circumstance. Using this method has been reported for CNT dispersion in …

Dispersibility study of carbon nanotubes using multiple light

Slight changes in dispersion states, invisible to the naked eye, can be measured via time-dependent in situ light detection using a high-precision light …

Determination of carbon nanoparticle dispersion solubility …

In the end, the best individual gives ideal solubility parameters, radius of the sphere, and outliers' percentage for the carbon NP dispersion. To keep the dispersibility sphere radius as small as possible, a small size factor to DataFit was multiplied, decreasing it as a function of R 0, as described in the cited study [2].

Esterified styrene-maleic anhydride ester copolymer

[Show full abstract] dispersion. The dispersibility of CNT dispersion with the PVP, evaluated via viscosity and particle size analyses, are superior to those with the DOC and NaDDBS dispersing agents.

High self-dispersibility carbon black particles prepared via

Thus these high self-dispersibility carbon black particles would have a more hopeful prospect in practical application. The obtained results therefore suggest that the increased percentage of polyurethane layer on the surface can lead to the encapsulated CBs with better aqueous dispersion stability.

Direct Evidence of the Exfoliation Efficiency and Graphene

To study the green solvent exfoliation efficiency and dispersibility of graphene independently, we performed SM-LPE in a range of green solvents and then removed the solvent and re-dispersed the subsequent powder in NMP (with high dispersibility) for analysis only, referred to as the NMP re-dispersion (NMP-R) from hereon.

Hansen Solubility Parameter Analysis on Dispersion of …

The solvent's HSP inside the HSP sphere causes high dispersibility of the OAm-Ag NPs in the solvent. In contrast, the HSPs outside the sphere resulted in low …

TURBISCAN DNS Multi-Sample Stability Analyzer

The measurement of the dispersibility and stability is done via two functions: Measurement while processing the formulation or dispersion (online or mixing directly in measurement vials) → dispersibility studies; At rest, without any additional forces → fast and quantitative stability and shelf-life studies

Effects of surfactants on dispersibility of graphene oxide dispersion …

The conductivity of SDBS/GO dispersion was higher than that of SDS/GO dispersion, and its appearance was slightly darker than SDS. The dispersibility of SDBS/GO dispersion is better than that of SDS/GO dispersion. Download : Download high-res image (347KB) Download : Download full-size image; Fig. 8.

Boron Nitride Nanosheet Dispersion at High Concentrations

These applications require stable, high-concentration BNNS dispersions as a precursor, which is a challenge because BNNSs do not disperse easily. We report a simple, yet efficient, mechanochemical exfoliation technique to prepare functionalized BNNSs with excellent dispersibility in water and organic solvents.

A Guide to Complete Characterization

For formulation characterization, Turbiscan® technology is the most complete tool: from particle size, dispersibility, stability quantifying and monitoring, through to the redispersion studies. Particle size and dispersibility are measured with a single measurement (which takes less than 30 seconds), without sample preparation or dilution.

Pharmaceutical Dispersion Techniques for Dissolution and …

The excellence in particle size (<100 nm) renders nanoemulsions a high dispersibility for drug and a great surface area for absorption. Nanoemulsions can either be water-containing formulation or water-free formulation.

Surface-Modified LDH Nanosheets with High Dispersibility …

Surface and interfacial engineering of nanomaterials is essential for improving dispersion stability in liquids. In this study, we report that oleic acid (OA)- and stearic acid (SA)-functionalized layered double hydroxide (LDH) nanosheets as lubricant additives can achieve high dispersion and reduce friction and wear. LDH is a typical …

Dispersion Properties of Nanocellulose: A Review

The homogeneous dispersion of GNs was crucial to prepare high-performance composites, such as membrane, fiber and aerogel (Thomas et al., 2018; ... Micelle Formation and Enhanced Dispersibility. ACS Sustainable Chemistry & Engineering, 5 (2) (2016), pp. 1264-1271. Google Scholar.