Electric-tunable wettability on a paraffin-infused slippery pattern surface

Gao, Wei; Wang, Jie; Zhang, Xiaoxuan; Sun, Lingyu; Chen, Yongping; Zhao, Yuanjin

doi:10.1016/j.cej.2019.122612

Cited by 45 publications

(33 citation statements)

References 36 publications

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“…Loading the voltage allows the melting of the surrounding paraffin, forming a fluid path along the wire. By tilting the LIS, the droplet can slide along the fluid pathway [ 41 ]. This technique was improved by integrating a flexible silver nanowire heater with the paraffin-infused micropillar-arrayed zinc oxide LIS [ 38 ].…”

Section: Droplet Manipulation On Smart Lismentioning

confidence: 99%

“…Targeting this active direction, Yang et al summarized developments of wettability-tunable LISs induced by external stimuli and their applications in fog collection, oil-water separation, complex-flow distribution, droplets' delivery in 2019 [37]. However, with the fast advancement of smart LISs, many important and successive works on improvements of responsive LISs and other nonconventional LISs were developed for droplet manipulation [38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55], but these studies are not reported by Yang' work. This review is an overview of the recent progress in smart LIS for droplet manipulation induced by external stimuli, as presented in Figure 1. We first give a summary of some unique properties and fundamentals of droplets on LIS.…”

Section: Introductionmentioning

confidence: 99%

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A Review of Smart Lubricant-Infused Surfaces for Droplet Manipulation

Hao

2021

Nanomaterials

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The nepenthes-inspired lubricant-infused surface (LIS) is emerging as a novel repellent surface with self-healing, self-cleaning, pressure stability and ultra-slippery properties. Recently, stimuli-responsive materials to construct a smart LIS have broadened the application of LIS for droplet manipulation, showing great promise in microfluidics. This review mainly focuses on the recent developments towards the droplet manipulation on LIS with different mechanisms induced by various external stimuli, including thermo, light, electric, magnetism, and mechanical force. First, the droplet condition on LIS, determined by the properties of the droplet, the lubricant and substrate, is illustrated. Droplet manipulation via altering the droplet regime realized by different mechanisms, such as varying slipperiness, electrostatic force and wettability, is discussed. Moreover, some applications on droplet manipulation employed in various filed, including microreactors, microfluidics, etc., are also presented. Finally, a summary of this work and possible future research directions for the transport of droplets on smart LIS are outlined to promote the development of this field.

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Section: Droplet Manipulation On Smart Lismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Review of Smart Lubricant-Infused Surfaces for Droplet Manipulation

Hao

2021

Nanomaterials

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“…The phase change based on the lubricant can also adjust the movement of the droplets on SLIPS. Chen et al [112] injected paraffin wax into the olivine crystal thin film of the orderly assembled silica (SiO 2 ) nanoparticles and found that the prepared SLIPS could control the movement of the droplets. The conversion of paraffin wax between solid phase and liquid phase is adjusted by electric heating.…”

Section: Microfluidic Manipulationmentioning

confidence: 99%

Recent advances in slippery liquid-infused surfaces with unique properties inspired by nature

2021

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The slippery liquid-infused porous surface(s) (SLIPS) that imitates the Nepenthes pitcher plant has proven to be highly versatile and can be combined with various surface characteristics such as dynamic response, antifouling, selective adhesion, and optical/mechanical tunability. In addition, the introduction of a lubricating fluid layer also gives it extremely low contact angle hysteresis and self-repairing properties, which further expands its application range. Currently, SLIPS has been proven to be suitable for many frontier fields such as aerospace, communications, biomedicine, and microfluidic manipulation. In this review, we explain the theoretical background of SLIPS and the preparation methods currently available, including the choice of substrate materials and lubricants, and we discuss the design parameters of the liquid injection surface and how to deal with the consumption of lubricants in practical applications. In addition, the paper focuses on current and potential applications, such as preventing pathogen contamination of and blood adhesion of medical equipment, manipulation of tiny droplets, and directional transportation of liquids. Finally, some weaknesses that appear when SLIPS is used in these applications are pointed out, which provides a new perspective for the development of SLIPS in the future.

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“…The smart control of water wetting performances on solid surfaces has been extensively explored because of its potential for application in many fields [1][2][3][4][5], such as controllable cell and protein adhesion [6][7][8], smart droplet manipulation in microfluidics [9,10], selective oil/water separation [11][12][13], and accurate drug delivery [14]. Stimulus-responsive strategies have been widely accepted as a useful way to achieve reversible wetting control, and the most common examples are rough structures modified with stimulus-responsive molecules, such as temperatureresponsive polymer poly(N-isopropylacrylamide) [15], pH-responsive carboxylic acids [16,17], and other materials with responsivity to ions [18,19], gas [20][21][22], electrons [23][24][25], light [26][27][28], magnetic fields [29,30], and other stimuli. Noticeably, on modified responsive molecule surfaces, surface micromorphology is constant, so it can only provide an invariable surface roughness and a fixed enhanced effect [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Dual-responsive shape memory polymer arrays with smart and precise multiple-wetting controllability

et al. 2021

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Smart-controlled surface wettability from superhydrophilicity to superhydrophobicity has been extensively explored, and stimulus-responsive strategies have been widely accepted as a useful method to realize reversibility. However, achieving smart and precise wetting control remains challenging because most previous studies focused on stimulating single surface chemistry or microstructures. Herein, a dualstimulus-responsive strategy that can synergistically stimulate surface chemistry and microstructures is demonstrated on the pH-responsive molecule poly(2-(diisopropylamino)ethyl methacrylate (PDPAEMA)-modified temperature-triggered shape memory polymer (SMP) arrays. The responsive PDPAEMA and SMP can provide the surface with tunable surface chemistry and microstructures, respectively. Thus, the wetting of the surface between various states can be reversibly and precisely controlled from superhydrophilicity to superhydrophobicity with contact angle (CA) differences of less than 15°under the cooperative effect between the adjustable surface microstructure and chemistry. The surface is further utilized as a platform to create gradient wettings based on its excellent controllability. Therefore, this work presents a strategy for surface wetting control by combining tunable surface microstructures and chemistry. The prepared samples with a special wetting controllability can be applied to numerous fields, including adaptive liquid microlenses, accurate drug release, and selective catalysis. This work also proposes novel expectations in designing smart functional surfaces.

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Electric-tunable wettability on a paraffin-infused slippery pattern surface

Cited by 45 publications

References 36 publications

A Review of Smart Lubricant-Infused Surfaces for Droplet Manipulation

A Review of Smart Lubricant-Infused Surfaces for Droplet Manipulation

Recent advances in slippery liquid-infused surfaces with unique properties inspired by nature

Dual-responsive shape memory polymer arrays with smart and precise multiple-wetting controllability

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