Fabrics with self-adaptive wettability controlled by “light-and-dark”

Kong, Yeeyee; Liu, Yuyang; Xin, John Haozhong

doi:10.1039/c1jm12516h

Cited by 75 publications

(60 citation statements)

References 27 publications

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“…However, no water can be transferred in opposite way through the fabric unless an extra pressure was applied to assist in the penetration. A similar result was also reported by Kong et al9 who showed that directional water transport can be formed on superhydrophobic fabric through light irradiation. Apart from the formation of wettability gradient across the thickness of fabric, abruptly changed wettability between hydrophobicity and hydrophilicity in thin nanofibrous membranes also showed directional water transport effect10.…”

supporting

confidence: 89%

Superphobicity/philicity Janus Fabrics with Switchable, Spontaneous, Directional Transport Ability to Water and Oil Fluids

Zhou

Wang

Niu

et al. 2013

Sci Rep

164

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Herein we demonstrate that switchable, spontaneous, directional-transport ability to both water and oil fluids can be created on fabric materials through wet-chemistry coating and successive UV irradiation treatment. When the fabric showed directional transport to a liquid, it prevented liquids of higher surface tension from penetration, but allowed liquids of lower surface tension to permeate, from either side. The directional transport ability can be switched from one fluid to another simply by heating the fabric at an elevated temperature and then re-irradiating the fabric with UV light for required period of time. By attaching liquid drops vertically upwards to a horizontally-laid fabric, we further demonstrated that this novel directional fluid transport was an automatic process driven by surface property alone, irrespective of gravity's effect. This novel fabric may be useful for development of “smart” textiles and functional membranes for various applications.

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supporting

confidence: 89%

Superphobicity/philicity Janus Fabrics with Switchable, Spontaneous, Directional Transport Ability to Water and Oil Fluids

Zhou

Wang

Niu

et al. 2013

Sci Rep

164

View full text Add to dashboard Cite

show abstract

“…For example, Wang et al and Zhou et al from our group [11][12][13] and Kong et al [14] have separately reported the preparation of directional water transport fabrics through a two-step process involving superhydrophobic treatment of fabric followed by one-side photo-degradation to create a hydrophobicity-to-hydrophilicity gradient through fabric thickness. Zhang et al [15] used a phase separation method to form a hydrophilic-to-hydrophobic gradient membrane showing directional water transport ability.…”

Section: Doi: 101002/admi201600036mentioning

confidence: 98%

“…Directional water transport through fabrics is ascribed to isotropic wettability along the fabric thickness. [3,11,13,14,19] Directional water transport fabrics show difference in water breakthrough pressure on the two fabric sides. [11][12][13]17] However, the lack of effective technique to precisely control the coating layer thickness has confined the study on the role of hydrophobic fabric layer thickness in forming directional water transport on conventional fabrics.…”

Section: Doi: 101002/admi201600036mentioning

confidence: 99%

Directional Water Transport Fabrics with Durable Ultra‐High One‐Way Transport Capacity

Zeng

Wang

Zhou

et al. 2016

Adv Materials Inter

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Fabrics with automatic one‐way water transport ability are highly desirable for applications in daily life, industry, health, and defense. However, most of the studies on one‐way water transport fabrics only report the qualitative water transport results. The lack of quantitative measure makes it hard to assess the directional transport quality. Here, it is proved that a hydrophilic fabric after being electrosprayed with a thin layer of hydrophobic coating on one side shows one‐way water transport ability. By using moisture management tester, the water transport property is qualitatively characterized and the effect of hydrophobic fabric layer thickness on one‐way water transport feature is examined. The hydrophobic fabric layer thickness is found to play a key role in deciding the one‐way transport ability. When a plain woven fabric with an overall thickness of 420 μm and average pore size of 33 μm is used as fabric substrate, a hydrophobic fabric layer thickness between 22 and 62 μm allows the treated fabric to show a one‐way droplet transport feature. A one‐way transport index as high as 861 can be attained. The one‐way water transport is durable enough to withstand repeated washing. This novel fabric may be useful for development of “smart” textiles for various applications.

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“…Titania nanoparticles are widely used not only in paint 7 , papermaking 8 , plastics 9 , cosmetics 10 , but also applied in many special research fields such as antibacterial 11 , anticorrosion 12 , antifogging 13 , biomedical 14 , fluid transportation 15 , liquid separation 16 , offset printing and liquid reprography 17 , self-cleaning 18 , site-selective functional patterning 19 and water condensation 20 . Physical and chemical properties of TiO 2 nanoparticles are affected not only by molecular structure, but also by their size, shape, organization, and surface properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of Structure of Cationic Comb Copolymers on Their Adsorption and Stabilization of Titania Nanoparticles

2015

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Cationic linear polymer poly([2-(methacryloyloxy)ethyl] trimethylammonium chloride) p(METAC), neutral brush polymer poly(poly(ethylene glycol) methyl ether methacrylate) p(PEO22MEMA), and cationic comb copolymers p(METAC-PEO(x)MEMA) were used for the stabilization of titania dispersions under neutral and alkaline conditions. Random comb copolymers p(METAC-PEO(x)MEMA) differing in charge density and length of PEO side chains were synthesized by RAFT. The adsorption of cationic polymers on titania nanoparticles was evaluated by thermogravimetric analysis; changes in surface potential, by measuring the zeta potential; and the stability of the treated TiO2 dispersions, by laser diffraction and DLS. Cationic linear and comb copolymers containing relatively short PEO side chains promoted the inversion of nanoparticle surface potential from strongly negative (-60 mV) to moderately positive (10-35 mV). Cationic comb copolymers containing longer PEO side chains increased the zeta potential of the treated nanoparticles but did not invert it to positive. Aqueous dispersions of titania nanoparticles stabilized by cationic comb copolymers under alkaline conditions (pH 10) were dispersed by high-energy planetary ball milling up to a primary particle size of 20 nm and were stable for at least 2 days.

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Fabrics with self-adaptive wettability controlled by “light-and-dark”

Cited by 75 publications

References 27 publications

Superphobicity/philicity Janus Fabrics with Switchable, Spontaneous, Directional Transport Ability to Water and Oil Fluids

Superphobicity/philicity Janus Fabrics with Switchable, Spontaneous, Directional Transport Ability to Water and Oil Fluids

Directional Water Transport Fabrics with Durable Ultra‐High One‐Way Transport Capacity

Effect of Structure of Cationic Comb Copolymers on Their Adsorption and Stabilization of Titania Nanoparticles

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