Effects of water-soluble polymers dissolved in an aqueous secondary fluid on the rheological properties of “capillary” suspensions

Yang, Jeewon; Kim, Jieun; Lee, Joohyung

doi:10.1007/s13367-022-00027-w

Cited by 3 publications

(1 citation statement)

References 21 publications

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“…For all five studied sample suspensions with Al 2 O 3 :EGaIn volume ratios of 40:10, 30:20, 20:30, 10:40, and 0:50 (note: data for the LM-free 50:0 suspension could not be obtained due to the difficulty of loading the highly vitrified sample), the G 0 dominated G 00 in the linear viscoelastic region, indicating that these samples behaved like elastic solids whose shapes were retained under low-shear conditions. At high shear stresses, both the G 0 and G 00 decreased significantly, and the G 00 became dominant over G 0 across the crossover point of both curves (defined as the yield point of the sample; the corresponding stress value is defined as the yield stress, τ y ), 40,41 indicating that the samples flowed as liquids under high-shear conditions. Thus, the results reveal the viscoelastic nature of the studied colloidal precursor suspensions before curing, which is of practical importance in terms of their processing.…”

Section: Resultsmentioning

confidence: 99%

Effects of a liquid metal co‐filler on the properties of epoxy/binary filler composites

Kim,

Song,

Kim

et al. 2023

J of Applied Polymer Sci

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Liquid metals (LMs) with high fluidity and high thermal conductivity (TC) are receiving considerable attention in the research on thermal management polymer composites as alternatives to conventional rigid solid fillers or as co‐fillers to overcome the trade‐off between TC and composite processability at high filler loads. While most previous studies have investigated the effects of LM fillers in soft elastomeric matrices, their effects on the composite properties with rigid matrices, such as epoxy‐based polymers, have not been discussed extensively. Herein, we investigated the effects of LM eutectic Ga‐In (EGaIn) as a co‐filler on the properties of rigid epoxy‐based composites with a binary filler (Al2O3/EGaIn) system. The increase in the volume fraction of LM fillers significantly improves the processability of uncured precursor composites but markedly decreases the mechanical strength of the cured composites at their high loads—the latter effects have rarely been examined in previous studies. However, with adequate LM loads, the composites exhibited superior mechanical properties compared with the all‐solid‐filler system, withstanding a surprisingly high compressive load (~100 kN) under which the all‐solid‐filler system fractured. Furthermore, the epoxy/binary filler composites exhibited reasonably high TC values (~1 W/mK) comparable to that of commercial epoxy molding compounds, suggesting their potential applicability for electronic packaging.

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Section: Resultsmentioning

confidence: 99%

Effects of a liquid metal co‐filler on the properties of epoxy/binary filler composites

Kim,

Song,

Kim

et al. 2023

J of Applied Polymer Sci

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Designing highly packed silicon anode slurries for high capacity and prolonged lifespan of lithium-ion batteries

Song,

Kim

et al. 2023

Chemical Engineering Journal

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Dispersion Homogeneity of Silicon Anode Slurries with Various Binders for Li-Ion Battery Anode Coating

et al. 2023

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We aimed to determine the relationship between surface chemistry and the rheological properties of silicon anode slurries in lithium-ion batteries. To accomplish this, we investigated the use of various binders such as PAA, CMC/SBR, and chitosan as a means to control particle aggregation and improve the flowability and homogeneity of the slurry. Additionally, we utilized zeta potential analysis to examine the electrostatic stability of the silicon particles in the presence of different binders, and the results indicated that the conformations of the binders on the silicon particles can be influenced by both neutralization and the pH conditions. Furthermore, we found that the zeta potential values served as a useful metric for evaluating binder adsorption and particle dispersion in the solution. We also conducted three-interval thixotropic tests (3ITTs) to examine the structural deformation and recovery characteristics of the slurry, and the results demonstrated that these properties vary depending on the strain intervals, pH conditions, and chosen binder. Overall, this study emphasized the importance of taking into account surface chemistry, neutralization, and pH conditions when assessing the rheological properties of the slurry and coating quality for lithium-ion batteries.

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Effects of water-soluble polymers dissolved in an aqueous secondary fluid on the rheological properties of “capillary” suspensions

Cited by 3 publications

References 21 publications

Effects of a liquid metal co‐filler on the properties of epoxy/binary filler composites

Effects of a liquid metal co‐filler on the properties of epoxy/binary filler composites

Designing highly packed silicon anode slurries for high capacity and prolonged lifespan of lithium-ion batteries

Dispersion Homogeneity of Silicon Anode Slurries with Various Binders for Li-Ion Battery Anode Coating

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