Evaluating wettability of geotextiles with contact angles

Zaman, Md. Wasif; Han, Jie; Zhang, Xiong

doi:10.1016/j.geotexmem.2022.03.014

Cited by 22 publications

(8 citation statements)

References 33 publications

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“…As described in Section 2, plasma treatments were carried out to activate the surface of the textile knits and enhance the adhesion of the (Ti,Cu) thin films. Low-pressure plasma treatments induce several phenomena, including: (i) cleaning the contaminant superficial layers, (ii) surface etching, which changes the morphology and topography, and (iii) activation through the generation of new reactive species, leading to the formation of new chemical groups, crosslinking and chain scission. ,, It is important to note that despite the changes promoted on the knit’s surface, the fundamental properties of the textile material were not compromised. , Then, to assess the changes/activation promoted on the treated knits, which strongly influence the adhesion at the textile/thin-film interface, the surface wettability was measured. ,, Figure illustrates the evolution of the water CA after activation for both the 39F and 62I knits, which were treated in their pristine form.…”

Section: Resultsmentioning

confidence: 99%

“…18,21,36 It is important to note that despite the changes promoted on the knit's surface, the fundamental properties of the textile material were not compromised. 41,42 Then, to assess the changes/activation promoted on the treated knits, which strongly influence the adhesion at the textile/thin-film interface, the surface wettability was measured. 18,21,36 Figure 4 illustrates the evolution of the water CA after activation for both the 39F and 62I knits, which were treated in their pristine form.…”

Section: Textile Structures�plasma Activationmentioning

confidence: 99%

See 1 more Smart Citation

EMI Shielding and Conductive Textiles Functionalized with (Ti,Cu) Nanomaterials for Biomedical Applications

Lopes,

Ferreira,

Correa

et al. 2023

ACS Appl. Mater. Interfaces

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This study explores the potential of integrating thinfilm technology in the design of new and effective electromagnetic interference (EMI) shielding and conductive materials for textiles and wearables. This application is of particular interest to the textile industry as it can bring new functionalities to wearables and protect humans from prolonged exposure to EM radiation. Three different thin films of pure Ti, pure Cu, and Ti-doped with Cu prepared by magnetron sputtering were used to functionalize textile knits based on cotton (code 39F) and lyocell fibers (62I). The films displayed different crystalline structures, morphologies, and topographies, which depended on their chemical compositions. The shielding effectiveness (SE) of the functionalized knits against EMI was evaluated in the frequency range of 2−8 GHz. Also, the electrical response under stress was assessed since the electrical conductivity is closely related to the EMI shielding effectiveness. The results demonstrate the feasibility of using a thin conductive layer based on Cu or Ti−Cu to improve the shield textiles with great adhesion and low thickness, providing an interesting path to improve shielding efficiency for EMI without modifying the flexibility of the textiles.

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Section: Resultsmentioning

confidence: 99%

Section: Textile Structures�plasma Activationmentioning

confidence: 99%

EMI Shielding and Conductive Textiles Functionalized with (Ti,Cu) Nanomaterials for Biomedical Applications

Lopes,

Ferreira,

Correa

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…In systems that are inhomogeneous, constant phase quantities are used instead of capacitors 48 . In other words, CPE is used to indicate processes that have some dissipative properties in addition to memory properties (such as capacitors whose charge and discharge in them is memory processes) 49 . The CPE impedance value is defined by two parameters n and Q , and its value is calculated using Eq.…”

Section: Resultsmentioning

confidence: 99%

“…The contact angle reported in this research is the static contact angle. In this research, a 5 µl droplet 47 – 49 was placed on the sample inside the device. Then, with a high-precision camera, the CA of the drop and its three-phase line was imaged at the point of contact with the surface.…”

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

Evaluation of corrosion performance of superhydrophobic PTFE and nanosilica coatings

Haji-Savameri

Irannejad

Norouzi-Apourvari

et al. 2022

Sci Rep

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Corrosion protection of metals is of paramount importance in different sectors of industry. One of the emerging techniques to prevent or reduce the damaging effects of this phenomenon is to apply superhydrophobic coatings on the susceptible surfaces. In this study, corrosion protection of steel is investigated by fabricating superhydrophobic coatings, using one-step electrodeposition process of nanosilica hybrid film and spraying process of polytetrafluoroethylene (PTFE) on steel surface and also preparation of micro/nano-composite coatings. The anti-corrosion behavior of the nanosilica hybrid film and PTFE coating with two types of microparticles including Al2O3 powder and glass beads in primer layer, and overcoat layer with and without SiO2 nanoparticles is studied. TOEFL polarization and electrochemical impedance spectroscopy (EIS) tests are conducted on coated steel samples to examine their corrosion performance in 3.5 wt% NaCl solution at a temperature of 25 °C. The results showed that the combination of superhydrophobic properties and low conductivity significantly improves the corrosion resistance. Evaluating the effect of adding SiO2 nanoparticles to the overcoat layer in PTFE coating showed that the nanoparticles improve the corrosion resistance of PTFE coatings by sealing up some defects and pores in the coating. Investigation of corrosion resistance of coatings showed that, the corrosion resistance of nanosilica film is lower than that of PTFE coatings. The best sample obtained in this study, namely the PTFE coating with glass beads microparticles in primer layer and SiO2 nanoparticles in overcoat layer, reduced the corrosion rate by nearly 80 times.

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“…Low-pressure plasma treatments induce several phenomena, including: i) cleaning the contaminant superficial layers, ii) surface etching, which changes the morphology and topography, and iii) activation through the generation of new reactive species, leading to the formation of new chemical groups, crosslinking and chain scission [14,17,28]. It is important to note, that despite the changes promoted on the knit's surface, the fundamental properties of the textile material were not compromised [33,34]. Then, to assess the changes/activation promoted on the treated knits, which strongly influence the adhesion at the textile/thin film interface, the surface wettability was measured [14,17,28].…”

Section: Textile Structures -Plasma Activationmentioning

confidence: 99%

EMI shielding and conductive textiles functionalized with (Ti,Cu) nanomaterials for biomedical applications

Lopes

Ferreira

Corrêa

et al. 2023

Preprint

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This study explores the potential of integrating thin film technology in the design of new and effective Electromagnetic Interference (EMI) shielding materials for textiles and wearables. This application is of particular interest to the textile industry as it can bring new functionalities to wearables and protect humans from prolonged exposure to EM radiation. Three different thin films of pure Ti, pure Cu and Ti-doped with Cu prepared by magnetron sputtering were used to functionalize textile knits based on cotton (code 39 F) and lyocell fibres (62 I). The films displayed different crystalline structures, morphologies, and topographies, which depended on their chemical compositions. The shielding effectiveness (SE) of the functionalized knits against EMI was evaluated in the frequency range of 2 GHz to 8 GHz. Also, the electrical response under stress was assessed since the electrical conductivity is closely related to the EMI shielding effectiveness. The results demonstrate the feasibility of using a thin conductive layer based on Cu to obtain shield textiles with great adhesion and low thickness, providing superior shielding efficiency for EMI by blocking the electrical waves.

show abstract

Evaluating wettability of geotextiles with contact angles

Cited by 22 publications

References 33 publications

EMI Shielding and Conductive Textiles Functionalized with (Ti,Cu) Nanomaterials for Biomedical Applications

EMI Shielding and Conductive Textiles Functionalized with (Ti,Cu) Nanomaterials for Biomedical Applications

Evaluation of corrosion performance of superhydrophobic PTFE and nanosilica coatings

EMI shielding and conductive textiles functionalized with (Ti,Cu) nanomaterials for biomedical applications

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