Fabrication of zero contact angle ultra-super hydrophilic surfaces

Prakash, C. G. Jothi; Raj, C. Clement; Prasanth, R.

doi:10.1016/j.jcis.2017.01.007

Cited by 57 publications

(22 citation statements)

References 57 publications

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“…Anodic coatings with a superhydrophilic comportment have the higher SFE values; our results are in agreement to previous works (Aguirre et al, 2018; Echeverry‐Rendón et al, 2017; Jothi Prakash, Clement Raj, & Prasanth, 2017). From the literature review, the nanotubular coatings as‐anodized are generally hydrophilic (Aguirre et al, 2018; Anitha et al, 2015; Lan, Liu, Huang, Chang, & Lee, 2013; Peng et al, 2013; Roguska et al, 2016; Shin, Shokuhfar, Choi, Lee, & Friedrich, 2011; Sun et al, 2018; Yoriya, Kittimeteeworakul, & Punprasert, 2012); however, the hydrophobic (Aguirre et al, 2018; Balaur, Macak, Tsuchiya, & Schmuki, 2005; Xue et al, 2018; Yang et al, 2014) and superhydrophilic (Bauer, Park, von der Mark, & Schmuki, 2008; Ercan, Taylor, Alpaslan, & Webster, 2011; Hamlekhan et al, 2014) behavior also have been reported.…”

Section: Discussionsupporting

confidence: 93%

“…From the literature review, the nanotubes heat and UV treated had a superhydrophilic comportment (Liu, Du, & Wang, 2016; Mazare et al, 2016; Shivaram et al, 2014; Yang et al, 2014); furthermore, it is worth to highlight that superhydrophilic behavior of this kind of samples was kept for 2 months after they were produced. According to our results, the superhydrophilic behavior and time that this comportment continues depend both on the nanotubes and their crystallographic phases (Jothi Prakash et al, 2017; Shivaram et al, 2014; Sun et al, 2018).…”

Section: Discussionmentioning

confidence: 58%

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Effect of surface characteristics on the antibacterial properties of titanium dioxide nanotubes produced in aqueous electrolytes with carboxymethyl cellulose

Ocampo

Echeverry‐Rendón

DeAlba-Montero

et al. 2020

J Biomedical Materials Res

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Nanotubular structures were produced on a commercially pure titanium surface by anodization in an aqueous electrolyte that contained carboxymethyl cellulose and sodium fluoride. The internal diameters obtained were about 100, 48, and 9.5 nm, respectively. Several heat treatments at 200, 350, and 600 C were made to produce nanotubes with different titanium dioxide polymorphs (anatase, rutile). All tested surfaces were superhydrophilic, this behavior was maintained after at least 30 days, regardless of the heat treatment. Although in previous works the nanotube features effect on the bacteria behavior had been studied; this item still unclear. For the best of our knowledge, the effect of small internal diameters (about 10 nm) with and without heat treatment and with and without ultraviolet (UV) irradiation on the bacteria strains comportment has not been reported. From our results, both the internal diameter and the postanodized treatments have an effect on the bacteria strains comportment. All nanotubular coatings UV treated and heat treated at 350 and 600 C; despite they have different inner diameters, inhibit the bacteria growth of both Staphylococcus aureus and Pseudomonas aeruginosa strains. The nanotubular coatings obtained at 20 V and heat treated at 350 C produced the lower bacteria adhesion against both strains evaluated.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 58%

Effect of surface characteristics on the antibacterial properties of titanium dioxide nanotubes produced in aqueous electrolytes with carboxymethyl cellulose

Ocampo

Echeverry‐Rendón

DeAlba-Montero

et al. 2020

J Biomedical Materials Res

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“…5f, the contact angle decreases with increase in surface roughness. Prakash et al 41 have proposed that roughness factor alone does not ensure hydrophilic behavior of membrane surface. Thus, the reduction of contact angle of PS 0.5 -TFN membranes suggest that the incorporation of Al 2 O 3 nanoparticles decreases interface energy and develops nano-channels on surfaces, thus allowing easy water-droplet expansion on its surface.…”

Section: Effect Of Al 2 O 3 Nanoparticles On Fo Performancementioning

confidence: 99%

Highly permeable and stable forward osmosis (FO) membrane based on the incorporation of Al₂O₃ nanoparticles into both substrate and polyamide active layer

Ding

Bao

et al. 2017

RSC Adv.

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In the present study, hydrophilic Al 2 O 3 nanoparticles were used as additives in both substrate and polyamide active (PA) layer to improve forward osmosis (FO) membrane properties. Via incorporation of 0.5 wt% Al 2 O 3 into the substrate and 0.05 wt% Al 2 O 3 into the PA layer (PS 0.5 -TFN 0.05 membrane), the water flux reached 27.6 L m À2 h À1 with a relatively low solute reverse flux of 7.1 g m À2 h À1 using DI water as a feed solution and 1 M NaCl as a draw solution. Simultaneously, we found that the incorporation of Al 2 O 3 nanoparticles into both the substrate and PA layer resulted in a better enhancement of FO performance and a higher increase in water flux than the simple incorporation of nanoparticles in substrate. Moreover, the PS 0.5 -TFN 0.05 membrane remained stable during long-term FO tests and under serious water environment. To the best of our knowledge, this is the first study to report the effect of Al 2 O 3 nanoparticles on FO performance, and the results verify the potential use of these nanoparticles in the fabrication of highly permeable FO membranes.

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“…Thus, different barks may need different approaches and the evaluation of the processes that govern the stemflow generation from the CA in the controlled laboratory conditions seems to be more faithful to the field conditions. In general, small CA (<< 90 • ) implies a high wettability and high CA (> > 90 • ) corresponds to low wettability systems (Yuan and Lee, 2013;Prakash et al, 2017;Sinderski, 2020). It is important to consider that not only the initial CA value is relevant when assessing wettability, but also the time evolution of the drop (Papierowska et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

How Is Bark Absorbability and Wettability Related to Stemflow Yield? Observations From Isolated Trees in the Brazilian Cerrado

Tonello

Campos

Menezes

et al. 2021

Front. For. Glob. Change

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Few investigations have examined the structural controls of bark on its water storage and influence on stemflow, despite the bark being considered a critical component that determines the time and magnitude of this process. This study seeks to answer the question: Do bark water absorbability and wettability estimates correlate with stemflow yield? We hypothesized that (1) the absorbability and wettability are correlated, that is, greater water absorbability implies greater wettability, and (2) high rates of bark water absorbability and wettability has a strong and negative correlation with stemflow generation. Stemflow yield (Sy) was monitored over 12 months for 31 trees, representing 9 species common to the Brazilian savanna ecosystem known as Cerrado. Bark absorbability, per unit dry weight, changes over time of the water absorbability (BWA - by submersion methodology), bark drying (BWD), bark absorbability rate (BWArate), bark drying rate (BWDrate), and wettability (initial contact angle – CAin and CA rate - CArate) were determined under laboratory conditions. As insoluble lignin may also act to alter bark water storage dynamics, for each species, the bark insoluble lignin content was characterized. Stemflow variability was significant across the study species. Funneling ratios (FR) indicates that all species’ canopies diverted enough rainfall as stemflow to concentrate rainwaters at the surface around their stem bases (FR > 1). Differences in bark water absorbability were notable some of tree species. A decrease in the CA value as a function of time was not observed for all barks, which in association with stemflow yields, allowed a novel classification method of wettability, based on CAin and it’s rate of change: highly wettable (CAin ≤ 75.3° and CArate ≥ 0.26°h–1) and non-wettable (CAin ≥ 93.5° and CArate ≤ 0.13°h–1). So, only from the wettability classification could be observed that the non-wettable bark species presented higher Sy, FR, BWA, and BWArate than highly wettable bark species. The stemflow from species with highly wettable bark had a strong and positive correlation with BWA. On the other hand, non-wettable bark stemflow yield has a strongly and negative correlation with FR, CAin, and BWArate. Thus, bark wettability properties showed to deserves special attention. This novel classification of bark wettability had a substantial effect on stemflow yield comprehension and proved to be an important variable to link laboratory and field investigation for understanding the stemflow yield. These findings will improve our understanding of the stemflow dynamics, water balance and the ecohydrology processes of forest ecosystems.

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Fabrication of zero contact angle ultra-super hydrophilic surfaces

Cited by 57 publications

References 57 publications

Effect of surface characteristics on the antibacterial properties of titanium dioxide nanotubes produced in aqueous electrolytes with carboxymethyl cellulose

Effect of surface characteristics on the antibacterial properties of titanium dioxide nanotubes produced in aqueous electrolytes with carboxymethyl cellulose

Highly permeable and stable forward osmosis (FO) membrane based on the incorporation of Al₂O₃ nanoparticles into both substrate and polyamide active layer

How Is Bark Absorbability and Wettability Related to Stemflow Yield? Observations From Isolated Trees in the Brazilian Cerrado

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Fabrication of zero contact angle ultra-super hydrophilic surfaces

Cited by 57 publications

References 57 publications

Effect of surface characteristics on the antibacterial properties of titanium dioxide nanotubes produced in aqueous electrolytes with carboxymethyl cellulose

Effect of surface characteristics on the antibacterial properties of titanium dioxide nanotubes produced in aqueous electrolytes with carboxymethyl cellulose

Highly permeable and stable forward osmosis (FO) membrane based on the incorporation of Al2O3 nanoparticles into both substrate and polyamide active layer

How Is Bark Absorbability and Wettability Related to Stemflow Yield? Observations From Isolated Trees in the Brazilian Cerrado

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Product

Resources

About

Highly permeable and stable forward osmosis (FO) membrane based on the incorporation of Al₂O₃ nanoparticles into both substrate and polyamide active layer