Highly stable and efficient electrorheological suspensions with hydrophobic interaction

Liang, Yudai; Yuan, Xin; Wang, Limin; Zhou, Xuefeng; Ren, Xiaobing; Huang, Yifan; Zhang, Mingjie; Wu, Jinbo; Wen, Weijia

doi:10.1016/j.jcis.2019.12.129

Cited by 28 publications

(21 citation statements)

References 40 publications

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“…Here, capillary suspensions are created with partially miscible liquids, however, without undergoing temperature changes that would, for example, result in phase transitions. A similar effect was also demonstrated for an electrorheological suspension in a mixture of silicone oil and alkane [74]. Simulations have also been conducted on such binary liquids under shear showing that while the aggregation size changes with shear rate, the concentration profile around a particle is insensitive to shear [75] Although we are beginning to understand the role of bridge coalescence in the strength and structures of capillary structures, the reverse situation caused by evaporation of the bridging fluid is not always marked by the same transition from a dense cluster to sparser bridged network structure.…”

Section: Discussionsupporting

confidence: 70%

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

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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.

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Section: Discussionsupporting

confidence: 70%

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

View full text Add to dashboard Cite

show abstract

“…result in phase transitions. A similar effect was also demonstrated for an electrorheological suspension in a mixture of silicone oil and alkane [70]. Simulations have also been conducted on such binary liquids under shear showing that while the aggregation size changes with shear rate, the concentration profile around a particle is insensitive to shear [71] While we are beginning to understand the role of bridge coalescence in the strength and structures of capillary structures, the reverse situation caused by evaporation of the bridging fluid is not always marked by the same transition from a dense cluster to sparser bridged network structure.…”

Section: Discussionsupporting

confidence: 70%

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

Bindgen,

Allard,

Koos

2021

Preprint

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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 a solids in a bulk liquid with an added secondary liquid. The structure of particle networks based on capillary bridges posses unique properties compared to 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.

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“…Although the hydrogen bonding between carboxylic groups can typically promote viscosity [ 59 ], the hydrophobic interaction should be decisively considered. The hydrophobic interaction can enhance viscosity [ 60 ]; the long chain length of alkanes induces the increase in hydrophobic interaction, resulting in the high viscosity of silicone oil [ 61 ]. However, the results from the 35% w/v fatty acid series might not be distinct since the smaller number of fatty acid molecules were evident for high MW fatty acid-based solutions.…”

Section: Resultsmentioning

confidence: 99%

Saturated Fatty Acid-Based In Situ Forming Matrices for Localized Antimicrobial Delivery

et al. 2020

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In recent years, the world has faced the issue of antibiotic resistance. Methicillin-resistant Staphylococcus aureus (MRSA) is a significant problem in various treatments and control of infections. Biocompatible materials with saturated fatty acids of different chain lengths (C8–C18) were studied as matrix formers of localized injectable vancomycin HCl (VCM)-loaded antisolvent-induced in situ forming matrices. The series of fatty acid-based in situ forming matrices showed a low viscosity (5.47–13.97 cPs) and pH value in the range of 5.16–6.78, with high injectability through a 27-G needle (1.55–3.12 N). The preparations exhibited low tolerance to high concentrations of KH2PO4 solution (1.88–5.42% v/v) and depicted an electrical potential change during phase transformation. Their phase transition and matrix formation at the microscopic and macroscopic levels depended on the chain length of fatty acids and solvent characteristics. The VCM release pattern depended on the nucleation/crystallization and solvent exchange behaviors of the delivery system. The 35% w/v of C12–C16 fatty acid-based in situ forming matrix prolonged the VCM release over seven days in which C12, C14, C16 –based formulation reached 56, 84, and 85% cumulative drug release at 7th day. The release data fitted well with Higuchi’s model. The developed formulations presented efficient antimicrobial activities against standard S. aureus, MRSA, Escherichia coli, and Candida albicans. Hence, VCM-loaded antisolvent-induced fatty acid-based in situ forming matrix is a potential local delivery system for the treatment of local Gram-positive infection sites, such as joints, eyes, dermis of surgery sites, etc., in the future.

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Highly stable and efficient electrorheological suspensions with hydrophobic interaction

Cited by 28 publications

References 40 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

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

Saturated Fatty Acid-Based In Situ Forming Matrices for Localized Antimicrobial Delivery

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