Investigating the Use of Nanoscale Bilayers Assembly on Stainless Steel Plate for Surface Hydrophilic Modification

This study investigated the use of nanoscale bilayers assembly for hydrophilic surface modification on stainless steel plate. This study first performed nanoscale bilayers assembly method, with the addition of top layer coatings for durability purposes, to modify the surface structure and thereby the hydrophilicity of the surface at 15, 17, 20, 23, and 25 bilayers. The relationship between the number of bilayers and the resulting contact angle was then empirically established. Results showed 17 bilayers to be the optimal number of bilayers among the samples tested, resulting in the smallest contact angle of 11° (compared to 70° on unmodified surface), corresponding to the highest surface wettability and hydrophilicity. From 0 to 17 bilayers, the contact angle seems to decrease linearly with the number of bilayers. Beyond 17 bilayers, at 20, 23, 25, and 30 bilayers, the samples showed no significant improvements in contact angle or hydrophilicity.

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Investigating the Application of Nanoscale Bilayers Assembly on Stainless Steel Plate to Evaporation Behavior

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.750-752.2104 ◽

2013 ◽

Vol 750-752 ◽

pp. 2104-2107 ◽

Cited By ~ 3

Author(s):

Shen Chun Wu ◽

Chao Tsai Hsu ◽

Wun Hong Yang ◽

Dawn Wang ◽

Hsih Shing Li ◽

...

Keyword(s):

Contact Angle ◽

Stainless Steel ◽

Steel Plate ◽

Contact Angles ◽

Stainless Steel Plate ◽

Hydrophilic Modification ◽

Modified Surface ◽

Surface Modified ◽

First Time ◽

The Relationship

This study investigates the use of nanoscale bilayers assembly film for hydrophilic modification on stainless steel plate and observed its effect on the plates evaporation behavior in acetone. This study first establishes the technique of nanoscale bilayers assembly, then performs surface hydrophilic modification on stainless steel plate by changing the surface structure, which produces different contact angles. The relationship between layers (0, 5, 10, 15 bilayers) of surface modified and the contact angle is empirically determined, and results show that, similar to findings stated in the literature [, after surface modification the contact angle decreases from 70° (layer 0) to 24° (layers 15); in addition, the results from this study have demonstrated a certain level of technical capability. This study was investigated the evaporation test in a modified surface , also is the first time reported in previous literature. Evaporation tests show that under the best contact angle evaporation rate can be increased by 50%, indicating the high potential of surface hydrophilic modification on stainless steel plate for improving evaporation behavior.

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Investigating the Use of Nanoscale Bilayers Assembly on Stainless Steel Plate for Surface Hydrophobic Modification and Condensation

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.423-426.792 ◽

2013 ◽

Vol 423-426 ◽

pp. 792-796

Author(s):

Shen Chun Wu ◽

Dawn Wang ◽

Sin Jie Lin ◽

Chen Yu Chung ◽

Yau Ming Chen

Keyword(s):

Stainless Steel ◽

Superhydrophobic Surface ◽

Steel Plate ◽

Chemical Vapor ◽

Optimal Number ◽

Film Condensation ◽

Condensation Process ◽

Water Droplets ◽

Stainless Steel Plate ◽

Assembly Method

This study investigated the use of nanoscale bilayers assembly for hydrophobic surface modification on stainless steel plate and its effect on condensation. This study first performed nanoscale bilayers assembly method, with the addition of a fluorosilane treatment using chemical vapor deposition (CVD), to modify the surface structure and thereby the wettability of the surface at 15, 20, and 30 bilayers. Experimental results showed 15 bilayers to be the optimal number of bilayers among the samples tested, resulting in the largest contact angle of 150° (compared to 70° on unmodified surface), corresponding to the highest surface hydrophilicity; however, beyond 15 bilayers there seems to be no significant changes or improvements to hydrophobicity. Visualization of the condensation process also indicated later formation of film condensation on superhydrophobic (15 bilayers) surface, and by tilting the condensation surfaces at 90°, the self-cleaning property of the superhydrophobic surface allows water droplets to roll off the surface due to gravity before formation of film condensation, while large water droplets still remain stuck on unmodified surface. Therefore, by allowing the condensation process on the superhydrophobic surface to continuously cycle back to droplet condensation, there is great potential for condensation enhancement on superhydrophobically modified surface.

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Investigating the use of Nanoscale Bilayers Assembly on Stainless Steel Plate to Improve Evaporation

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.395-396.718 ◽

2013 ◽

Vol 395-396 ◽

pp. 718-725 ◽

Cited By ~ 2

Author(s):

Shen Chun Wu ◽

Dawn Wang ◽

Hsih Shing Li ◽

Sin Jie Lin ◽

Chao Tsai Hsu ◽

...

Keyword(s):

Contact Angle ◽

Stainless Steel ◽

Surface Modification ◽

Contact Angles ◽

Steel Plates ◽

Stainless Steel Surface ◽

Hydrophilic Surface ◽

Evaporation Time ◽

Assembly Technique ◽

The Relationship

This study investigated the use of nanoscale bilayers assembly film for hydrophilic surface modification on stainless steel plates and observed its effects on the evaporation of acetone and ethanol on the plates. This study first established the nanoscale bilayers assembly technique, and then performed hydrophilic surface modification on stainless steel plates by changing the surface structure, producing different contact angles. The relationship between the number of bilayers (10, 20, and 30) and the resulting contact angle was empirically determined; results indicated that 20-bilayer modification yielded the best result, reducing the contact angle from 70° (unmodified surface) to 12°. Beyond 20 bilayers, at 30 bilayers, the samples show no significant changes or improvements to contact angle or hydrophilicity. Results from evaporation time tests showed that, compared to the evaporation time of ethanol and acetone on unmodified flat stainless steel surface, this decreased contact angle can improve the evaporation time by 100%, clearly indicating that hydrophilic surface modifications causes significant improvement in evaporation.

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Investigating the Effect of Hydrophilic Surface Modification on Droplet Evaporation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1120-1121.779 ◽

2015 ◽

Vol 1120-1121 ◽

pp. 779-784

Author(s):

Shen Chun Wu ◽

Sin Jie Lin ◽

Dawn Wang ◽

Yau Ming Chen

Keyword(s):

Stainless Steel ◽

Surface Modification ◽

Thin Layers ◽

Steel Plates ◽

Transfer Enhancement ◽

Flat Plates ◽

Assembly Method ◽

Evaporation Heat ◽

Steel Surfaces ◽

The Relationship

In this study, surface modification of stainless steel flat plates was performed using nanoscale bilayers assembly method to increase the surface’s hydrophilicity and enhance evaporation. Thin layers of SiO2 nanoparticles layered onto the stainless steel surfaces were used to modify their surface properties, and the relationship between the number of layers (0~20) and water’s hydrophilicity (surface tension) was investigated. The effects of modification on evaporation were then tested using de-ionized water. According to experimental results, surface modification was able to reduce the contact angle of water on stainless steel flat plate from the unmodified 87o to 7o at 18 layers, significantly increasing the hydrophilicity of the surface. Evaporation experiments show that the evaporation heat transfer enhancement for droplets on stainless steel plates is at least 300%.Keywords: bilayers assembly, hydrophilicity, surface modification, evaporation performance

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Effects of bracket design on critical contact angle

The Angle Orthodontist ◽

10.2319/080112-621.1 ◽

2013 ◽

Vol 83 (5) ◽

pp. 877-884 ◽

Cited By ~ 4

Author(s):

Xiaomo Liu ◽

Peng Ding ◽

Jiuxiang Lin

Keyword(s):

Contact Angle ◽

Stainless Steel ◽

Linear Regression ◽

Resistance To Sliding ◽

The Relationship ◽

State Resistance ◽

Critical Contact ◽

Bracket Design

ABSTRACT Objective: To explore how the position of the bracket slots relative to the archwire influences the friction between them, and how bracket design affects the critical contact angle (θc). Materials and Methods: Two kinds of stainless steel archwires (0.016 and 0.019 × 0.025-inch) were tested against four kinds of brackets (Transmission Straight Archwire bracket, Domestic MBT bracket, Tip-Edge Plus bracket, and BioQuick self-ligation bracket) in the dry state. Resistance to sliding (RS) was measured as an increase in contact angle (θ). The value of θc was calculated by two linear regression lines. Results: Friction remained stable when θ < θc, then increased linearly when θ > θc. The θc values of the Tip-Edge Plus bracket and Transmission Straight Archwire bracket were significantly larger than those for the Domestic MBT bracket and BioQuick self-ligation bracket. Conclusions: The relationship between the archwire and bracket slot significantly affects the resistance to sliding. The “edge-off” structure of the Tip-Edge Plus bracket and Transmission Straight Archwire bracket could help to increase the θc value, and to expand the passive configuration range.

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