Connecting particle clustering and rheology in attractive particle networks

Bindgen, Sebastian; Bossler, Frank; Allard, Jens; Koos, Erin

doi:10.1039/d0sm00861c

Cited by 20 publications

(34 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In both states, regardless of the contact angle of the secondary fluid, the clusters continue to grow with increasing fractions of secondary liquid until they incorporate nearly all of the particles in the system. The secondary liquid has fully coalesced around the particles in a continuous fashion allowing many connections with surrounding particles at once [9]. The resulting bicontinuous structure still forms a sample-spanning network with a rather thick backbone, and the interstitial regions consist of the bulk liquid devoid of particles [2][3][4]6,34], as shown in Figure 1b.…”

Section: Bridge Coalescencementioning

confidence: 99%

“…Neighboring nodes are connected via edges that can be assigned based on a distance or energy criterion. Graph theory has given rise to new measures, such as the clustering coefficient, as shown in Figure 4a, to describe the structure of particle networks [9]. This measure was used in combination with the coordination number to develop a state diagram that maps these graph theory measures onto the viscoelastic properties of capillary suspensions.…”

Section: Capillary Force and Influence Of Bridge Shapementioning

confidence: 99%

“…This means that the storage modulus of capillary suspensions is mostly related to sample-spanning parts of the network, as also shown by the observations using the fractal dimension. The denser flocs mostly redistribute forces into different strands of the backbone [9,24]. Increasing the amount of secondary fluid only increases the yield stress up to a certain threshold.…”

Section: Capillary Force and Influence Of Bridge Shapementioning

confidence: 99%

“…Increasing the amount of secondary fluid only increases the yield stress up to a certain threshold. After that point, the bridges begin to coalesce into dense structures [9]. These dense clusters grow in size with the addition of secondary fluid but do not actually contribute to the elastic network response.…”

Section: Capillary Force and Influence Of Bridge Shapementioning

confidence: 99%

“…However, there is an influence that can be seen in the mechanical properties [9]. The maximum in the dynamic moduli for pendular-funicular state networks with θ < 90°appears at a different amount of secondary liquid than for capillary state networks with θ > 90°.…”

Section: Bridge Coalescencementioning

confidence: 99%

See 4 more Smart Citations

The behavior of capillary suspensions at diverse length scales: From single capillary bridges to bulk

Bindgen¹,

Allard²,

Koos

2022

Current Opinion in Colloid & Interface Science

Self Cite

View full text Add to dashboard Cite

Liquid-liquid-solid systems are becoming increasingly common in everyday life with many possible applications. Here, we focus on a special case of such liquid-liquid-solid systems, namely, capillary suspensions. These capillary suspensions originate from particles that form a network based on capillary forces and are typically composed of solids in a bulk liquid with an added secondary liquid. The structure of particle networks based on capillary bridges possesses unique properties compared with networks formed via other attractive interactions where these differences are inherently related to the properties of the capillary bridges, such as bridge breaking and coalescence between adjacent bridges. Thus, to tailor the mechanical properties of capillary suspensions to specific requirements, it is important to understand the influences on different length scales ranging from the dynamics of the bridges with varying external stimuli to the often heterogeneous network structure.

show abstract

Section: Bridge Coalescencementioning

confidence: 99%

Section: Capillary Force and Influence Of Bridge Shapementioning

confidence: 99%

Section: Capillary Force and Influence Of Bridge Shapementioning

confidence: 99%

Section: Capillary Force and Influence Of Bridge Shapementioning

confidence: 99%

Section: Bridge Coalescencementioning

confidence: 99%

See 3 more Smart Citations

The behavior of capillary suspensions at diverse length scales: From single capillary bridges to bulk

Bindgen¹,

Allard²,

Koos

2022

Current Opinion in Colloid & Interface Science

Self Cite

View full text Add to dashboard Cite

show abstract

Liquid‐Suspended and Liquid‐Bridged Liquid Metal Microdroplets

Kim

Lee

2022

Small

View full text Add to dashboard Cite

because it allows for simple on-demand deposition of materials with a reduced number of processes and relatively low amounts of waste compared to conventional lithography, conferring a higher efficiency. Moreover, facile additive manufacturing or "3D printing" of a complicated free-standing structure may be possible using DIW, [25] potentially with high accuracy. Thus far, DIW and 3D printing using materials other than LM have been widely used for applications in various fields, [26][27][28][29][30][31][32][33][34][35][36][37] which often employ an ink-type filament with proper rheological properties.Despite the fluidic nature of LMs and alloys, 3D printing using these materials is not trivial. In addition to fluid-like properties that allow for printing via shear extrusion, the ink-type filament must also be sufficiently solid-like to enable the printed ink to retain its shape and not spread over the previously printed structure or substrate. [24,25] Thus, the ink-type filament for 3D printing should be a viscoelastic fluid possessing both high elastic (G′) and viscous (G′′) moduli, often characterized by a high yield stress (τ y ) value. An oxide passivation layer (1-5 nm), which spontaneously forms on the surface of LMs when exposed to air, can provide some solid-like properties locally. [1,38] However, bulk metals in the liquid state have low viscosities (near that of water) and exhibit Newtonian behavior under a wide range of shear, which complicates 3D printing. [24] To date, several methods have been suggested for 3D printing of LMs and alloys. [24] One possible approach, in which the LMs and alloys can be used directly without modification, is to precisely control the printing parameters, [39] such that the rupture and rapid reformation of the surface oxide layer can occur continually to achieve shape retention of the printed LMs. This requires the printing nozzle to be located in close proximity to a substrate. Once the meniscus of the LM at the nozzle tip, which is formed at an adequately set pressure, adheres to the substrate, the nozzle movement creates mechanical stress, which can rupture the oxide layer, thus allowing for drawings with flowing LM (the shape of which can be retained by the rapid reformation of the oxide layer). The second possible method is to disperse solid particle fillers in the LM (as a continuous-phase medium), which could significantly increase the rheological strength of the LMs, rendering them 3D-printable without sophisticated control of the printing parameters to a degree that is required for the printing of pristine LM. [17,18,21] Liquid metals (LMs) and alloys are attracting increasing attention owing to their combined advantages of high conductivity and fluidity, and have shown promising results in various emerging applications. Patterning technologies using LMs are being actively researched; among them, direct ink writing is considered a potentially viable approach for efficient LM additive manufacturing. However, true LM additive manufacturing with arbitrary printing g...

show abstract

Combining robocasting and alkali-induced starch gelatinization technique for fabricating hierarchical porous SiC structures

Sun

Xia²,

Feng³

et al. 2022

Additive Manufacturing

View full text Add to dashboard Cite

Connecting particle clustering and rheology in attractive particle networks

Abstract: The structural properties of suspensions and other multiphase systems are vital to overall processability, functionality and acceptance among consumers. Therefore, it is crucial to understand the intrinsic connection between the...

Cited by 20 publications

References 54 publications

The behavior of capillary suspensions at diverse length scales: From single capillary bridges to bulk

The behavior of capillary suspensions at diverse length scales: From single capillary bridges to bulk

Liquid‐Suspended and Liquid‐Bridged Liquid Metal Microdroplets

Combining robocasting and alkali-induced starch gelatinization technique for fabricating hierarchical porous SiC structures

Contact Info

Product

Resources

About