Dispersion and stability of colloidal boron carbide suspensions

Lakhdar, Yazid; Tuck, Christopher; Terry, Anna; Goodridge, Ruth

doi:10.1016/j.ceramint.2020.07.289

Cited by 9 publications

(5 citation statements)

References 31 publications

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“…The sedimentation volume offers valuable insights into suspension stability: when repulsive forces prevail in a stable dispersed system, it forms a tightly packed sediment. In contrast, an aggregated suspension driven by attractive inter‐particle forces will yield a larger, less compact sediment [38] . The sediment heights formed after 4 hours reflect the sedimentation characteristics of the analysed minerals.…”

Section: Resultsmentioning

confidence: 99%

“…In contrast, an aggregated suspension driven by attractive interparticle forces will yield a larger, less compact sediment. [38] The sediment heights formed after 4 hours reflect the sedimentation characteristics of the analysed minerals. Following the addition of PEI, for kaolinite, the sediment is significantly the highest (2.8 mm), although unmodified suspensions of both kaolinite and montmorillonite produce sediments of similar height (1.4 mm).…”

Section: The Zeta Potentialmentioning

confidence: 99%

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Evaluation of the Effect of Polyethylenimine on Boron Adsorption by Soil Minerals

Ulatowska,

Szewczuk‐Karpisz,

Polowczyk

2024

ChemPhysChem

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The removal of hazardous ions from water is crucial for safeguarding both the environment and human health. Soil minerals, integral components of soil, play a vital role as adsorbents for various contaminants, including heavy metal ions, organic dyes, and detergents. This study investigates the interaction between boron ions and soil minerals (gibbsite, kaolinite, and montmorillonite) in the presence of polyethylenimine (PEI). The minerals underwent characterization based on specific surface area, particle size distribution, zeta potential, and the presence of functional groups. The influence of PEI addition on the stability of the soil mineral suspension was evaluated by turbidimetry. Mineral‐boron and mineral‐boron‐PEI interactions were explored under varying conditions, including pH, initial boron concentration, and mineral quantity, with all adsorption experiments conducted over 24 hours. Using the Langmuir isotherm, the maximum adsorption capacity of the studied minerals was determined for boron both without and in the presence of PEI. For gibbsite, kaolinite and montmorillonite, it was 30.63, 24.55 and 26.62 mg g‐1, respectively, while in the presence of PEI, it increased to 33.11, 26.61 and 45.47 mg g‐1, respectively. The addition of PEI enhanced boron adsorption from aqueous solutions, increasing the removal efficiency from 65% to about 80%.

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Section: Resultsmentioning

confidence: 99%

Section: The Zeta Potentialmentioning

confidence: 99%

Evaluation of the Effect of Polyethylenimine on Boron Adsorption by Soil Minerals

Ulatowska,

Szewczuk‐Karpisz,

Polowczyk

2024

ChemPhysChem

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“…The optimization of ceramic particle distribution within the polymer ber is crucial for enhancing the material properties. A homogeneous distribution of ceramic particles contributes to improved material characteristics, whereas an uneven distribution leads to the formation of vulnerable areas in the material [25], [26], [30], [31]. The strong compatibility observed between y ash and PAN polymeric ber facilitates the homogeneous dispersion of particles within the ber.…”

Section: Decoration Mechanism Of Waste Y Ash Ceramic Particles To Pan...mentioning

confidence: 99%

“…The distribution of ceramic particles within the polymer matrix is predominantly in uenced by the interaction between the two component phases. The agreement of the surface interaction between ceramic and polymer is primarily in uenced by two key factors: physical interactions and dispersion stability [25], [26].…”

Section: Decoration Mechanism Of Waste Y Ash Ceramic Particles To Pan...mentioning

confidence: 99%

Effect of waste fly ash incorporated into the polymer matrix and surface interactions on radiation shielding effectiveness

Özcan

2024

Preprint

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This study focuses on enhancing the surface modification of waste fly ash, which is generated by coal combustion in thermal power plants. The electrospinning method was used to reinforce waste fly ash onto PAN nanofiber. The present study investigates the surface interaction between ceramic fly ash particles and PAN polymer and the potential synergy that may arise from their combination. The flexing capacity of PAN fiber has been found to reach up to three times its original size while simultaneously integrating the fly ash ceramic component into its structural composition. It has been discovered that adding fly ash to PAN Fiber improves its gamma and neutron shielding properties. According to this understanding, the radiation at 0.05 MeV energy can be reduced by 50% with just 0.7 cm of fly ash-reinforced PAN nanofiber material.

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“…The chemical functionalization of inorganic particles or boron molecular clusters (e.g., carborane) for blending with polymers is generally expensive and time-consuming, thus greatly limiting their commercialization 24 . The aqueous dispersion of B 4 C powders also requires high solid loading or an additional dispersing agent for colloidal formation 25 , 26 . Therefore, designing lightweight, shape-controllable, structurally stable B 4 C composites using a cost-effective technique and gaining detailed insight into boron distribution in the robust and flexible matrix is critical for constructing effective neutron-shielding measures.…”

Section: Introductionmentioning

confidence: 99%

Robust 2D layered MXene matrix–boron carbide hybrid films for neutron radiation shielding

Han,

Seok,

Jin

et al. 2023

Nat Commun

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Large-scale fabrication of neutron-shielding films with flexible or complex shapes is challenging. Uniform and high boron carbide (B4C) filler loads with sufficient workability are needed to achieve good neutron-absorption capacity. Here, we show that a two-dimensional (2D) Ti3C2Tx MXene hybrid film with homogeneously distributed B4C particles exhibits high mechanical flexibility and anomalous neutron-shielding properties. Layered and solution-processable 2D Ti3C2Tx MXene flakes serve as an ideal robust and flexible matrix for high-content B4C fillers (60 wt.%). In addition, the preparation of a scalable neutron shielding MXene/B4C hybrid paint is demonstrated. This composite can be directly integrated with various large-scale surfaces (e.g., stainless steel, glass, and nylon). Because of their low thickness, simple and scalable preparation method, and an absorption capacity of 39.8% for neutrons emitted from a 241Am9Be source, the 2D Ti3C2Tx MXene hybrid films are promising candidates for use in wearable and lightweight applications.

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Dispersion and stability of colloidal boron carbide suspensions

Cited by 9 publications

References 31 publications

Evaluation of the Effect of Polyethylenimine on Boron Adsorption by Soil Minerals

Evaluation of the Effect of Polyethylenimine on Boron Adsorption by Soil Minerals

Effect of waste fly ash incorporated into the polymer matrix and surface interactions on radiation shielding effectiveness

Robust 2D layered MXene matrix–boron carbide hybrid films for neutron radiation shielding

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