Mineralized growth of Janus membrane with asymmetric wetting property for fast separation of a trace of blood

Zhang, Wenbing; Hu, Liang; Chen, Hanmei; Gao, Shoujian; Zhang, Xiangcheng; Jin, Jian

doi:10.1039/c7tb00644f

Cited by 26 publications

(15 citation statements)

References 44 publications

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“…The Janus interface material, two‐dimensional materials with asymmetric properties on both sides, have attracted much attention . As a kind of interesting interface material, Janus composites have been applied in the field of interfacial mass transfer, sewage filtration, and directional water transport . Janus wettability is an instantaneous action, which mainly relies on the asymmetric hygroscopicity of the inner and outer layers of the material to derive water rapidly.…”

Section: Introductionmentioning

confidence: 99%

Application of surface wettability modified polypropylene nonwoven in Janus composite fibrous mats for the function of directional water transport

Zhang²,

Wang

et al. 2019

Polymers for Advanced Techs

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Textiles with the function of directional water (sweat) transport play a pivotal role in regulating human thermal and wet comfort. Polypropylene nonwoven (PPNW) fabric has an excellent moisture (sweat) conduction due to its inert water absorption, which makes moisture be difficult to adhere on the PP fiber surface. Nevertheless, excessive hydrophobicity also affects the comfort of clothing materials, and thus it is significant to improve wettability of PP fiber used in the field of textile. In this study, it was reported a kind of composite fibrous mats with the function of directional water transport. The polymerization of acrylic acid (AAc) was grafted on the surface of plasma-treated PPNW (TPPNW) as the inner layer (TPPNW-AAc), which was able to improve the wettability of the PPNW surface. Polyacrylonitrile containing alumina nano-particles (PAN-Al 2 O 3 ) layer was deposited on the surface of TPPNW-AAc by electrospinning technology as the outer layer. The wettability difference between the inner and outer layers of the material was utilized to induce the push-pull effect to transport water from the TPPNW-AAc layer to the PAN-Al 2 O 3 layer. The surface wettability of the TPPNW-AAc layer and the performance of the directional water transport of composite fibrous mats were characterized systematically. Experimental results demonstrated that the composite fibrous mats showed the excellent accumulative one-way transport index (AOTI, 870%), remarkable overall moisture management capacity (OMMC, 0.8) when the contact angle of the TPPNW-AAc surface can be reduced from 119°to 30°, and decent wearability performance.

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Section: Introductionmentioning

confidence: 99%

Application of surface wettability modified polypropylene nonwoven in Janus composite fibrous mats for the function of directional water transport

Zhang²,

Wang

et al. 2019

Polymers for Advanced Techs

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“…In this way, the modification depth could be controlled to some extent via the deposition time. [ 49 ] The modifiers used for the single‐side interface‐confined modification include dopamine, [ 49–59 ] hydroxyapatite, [ 60 ] catechol, [ 61 ] starch paste, [ 62 ] KOH solution, [ 63,64 ] 1H,1H,2H,2H‐perfluorodecyltriethoxysilane, [ 65 ] octadecylamine, [ 66 ] fluoropolymer emulsion foam, [ 67 ] paraffin, [ 68 ] polydimethylsiloxane, [ 69 ] and TiO 2 nanoparticle slurry. [ 70 ] Note that the prerequisite of this method is that the membrane surface should be nonwettable to the modifier solution for ensuring a nonuniform modification.…”

Section: Asymmetric Surface Construction and Regulation For Janus Memmentioning

confidence: 99%

“…[ 70 ] Note that the prerequisite of this method is that the membrane surface should be nonwettable to the modifier solution for ensuring a nonuniform modification. [ 49–70 ] It is thus not suitable for the wettable system because the modification solution would easily penetrate through membrane pores due to capillary effect, leading to an indiscriminate decoration on both sides. This substrate‐dependent issue could be addressed to some extent through the single‐side spraying technique.…”

Section: Asymmetric Surface Construction and Regulation For Janus Memmentioning

confidence: 99%

“…Such particular gating property has endowed Janus membranes with competitive advantages in the applications of liquid manipulation, including oil collection, [ 29,40,49,53,106,107 ] oil−water separation, [ 34,37–39,44,46,54,59,65,69,100,108 ] fog harvesting, [ 16,20,32,78,82,85,88 ] and biofluid management. [ 22,23,25,35,36,60 ]…”

Section: Asymmetric Surface Engineering Of Janus Membranes For Targetmentioning

confidence: 99%

“…The whole process prevents red blood cells from entering the enzyme layer of the blood glucometer, extremely enhancing the detection accuracy of blood glucose. [ 60 ] Another example is for wound exudate removing. The Janus nanofibrous membrane is prepared by electrospinning a thin hydrophobic nanofiber array onto a thick hydrophilic microfiber network.…”

Section: Asymmetric Surface Engineering Of Janus Membranes For Targetmentioning

confidence: 99%

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Asymmetric Surface Engineering for Janus Membranes

Yang

2020

Adv Materials Inter

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Emerging Janus membranes, named after the ancient Roman god with two faces to better survey both the past and the future, are appealing materials to tackle this challenge. They possess opposing chemicophysical properties on two sides for achieving a breakthrough in their performances. [12] The opposite surface properties usually include asymmetric wettability and charge but not limited to them. [13] Janus membranes with asymmetric wettable surfaces have received most of the attention in diverse research fields for a wide variety of applications because of their distinctive mass (e.g., liquid or gas) transport behaviors in two-phase or multiphase systems. Such unique fluid transportation relies on the cooperative effect arisen from the asymmetric wettability in the direction of membrane thickness. [14] Therefore, how to create and regulate asymmetry is a core task in the preparation of Janus membranes.Surface engineering, a process for modifying the surface of a material, provides a powerful toolbox to enhance and optimize the performance of the material, especially for porous membranes with large internal surface area. A myriad of modification methods including surface coating, grafting, and self-assembling have been developed to regulate membrane surface properties which are usually uniform in the spatial distribution. As distinguished from ordinary surface treatments, asymmetric surface engineering aims to accurately control the uneven distribution of surface properties or functionalities in the direction of membrane thickness, being an effective means for the preparation of Janus membranes.Benefiting from the asymmetric surface engineering, the researches on Janus membranes have mushroomed in recent years. Hundreds of literatures have explored the possibilities for Janus membranes to substitute traditional ones for achieving enhanced performances in the mass transfer between two phases, including water−oil, water−gas, and oil−gas systems. Some researchers have reviewed the research progresses on Janus membranes from different perspectives. Our previous review has discussed the definition and fabrication of Janus membranes and summarized their applications in the field of environmental science. [13] Another two reviews, presented by Zhao et al. [14] and Zhou et al., [15] have described the distinctive unidirectional fluid transport phenomenon of Janus membranes and their functional applications. Besides, a recent review has detailed the potential of Janus configuration in terms of enhancing energy efficiency in membrane processes. [12] However, the vital role of asymmetric surface engineering in the construction of asymmetric configurations, the modulation of surface properties, and the implementation of ultimate applications has not been addressed. Herein, Janus membranes show great promise toward various applications and are undergoing a fast-paced development in materials science. The asymmetric surface engineering on surface wettability, layer thickness, and pore structure enables Janus membranes with super...

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Janus Membranes: Creating Asymmetry for Energy Efficiency

et al. 2018

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Membranes are recognized as a key component in many environment and energy-related applications, but conventional membranes are challenged to satisfy the growing demand for ever more energy-efficient processes. Janus membranes, a novel class with asymmetric properties on each side, have recently emerged and represent enticing opportunities to address this challenge. With an inner driving force arising from their asymmetric configuration, Janus membranes are appealing for enhancing energy efficiency in a variety of membrane processes by promoting the desired transport. Here, the fundamental principles to prepare Janus membranes with asymmetric surface wettability and charges are summarized, and how they work in conventional and unconventional membrane processes is demonstrated.

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Mineralized growth of Janus membrane with asymmetric wetting property for fast separation of a trace of blood

Abstract: Janus membranes were fabricated by diffusion-controlled chemical precipitation of needle-like HAP nanocrystals and successfully applied for spontaneous separation of red cells from blood.

Cited by 26 publications

References 44 publications

Application of surface wettability modified polypropylene nonwoven in Janus composite fibrous mats for the function of directional water transport

Application of surface wettability modified polypropylene nonwoven in Janus composite fibrous mats for the function of directional water transport

Asymmetric Surface Engineering for Janus Membranes

Janus Membranes: Creating Asymmetry for Energy Efficiency

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