Study of Novel Low Surface Energy Antifouling Coating Prepared with Silicon-Modified Acrylic Resin and Nano-TiO2

AbstractThe damage caused by marine fouling organisms to ships and underwater artificial equipment is becoming increasingly serious issue, and the prevention and control of marine biofouling has always been a research hotspot in marine coatings. Aiming at the problems of poor adhesion, long curing time and high curing temperature of low-surface energy marine antifouling coatings of organosilicon, a hydrophobic low-surface energy nano-SiO2/silicon acrylic resin nanocomposite coating was synthesized. The anticorrosive property of the composite coatings was analyzed by simulated seawater periodic immersion experiments. The gel permeation chromatography analysis showed that polydimethyl-siloxanes (PDMS) is involved in cross-linking reactions. The dynamic thermomechanical analysis indicated that the glass transition temperature of resin is 58 °C. The contact angle (CA) test showed that the CA of nanocomposite coating is 109.99°. All the detection results can support the excellent antifouling and anticorrosion performance of the low surface energy nanocomposite coatings.

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Study on Fluorocarbon Antifouling Coatings with Low Surface Energy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.689.445 ◽

2011 ◽

Vol 689 ◽

pp. 445-449

Author(s):

Chun Hong Qiu ◽

Yu Hong Qi ◽

Zhan Ping Zhang ◽

Hui Gao

Keyword(s):

Contact Angle ◽

Surface Energy ◽

Water Contact Angle ◽

Dynamic Testing ◽

Marine Diatom ◽

Silicone Resin ◽

Water Contact ◽

Antifouling Coating ◽

Low Surface Energy ◽

Antifouling Coatings

To develop non-toxic marine antifouling coating, a series of antifouling coatings were prepared based on fluorocarbon copolymer. Based on the measurement of roughness and water contact angle, the attachment test of marine diatom and bacteria before and after dynamic testing in seawater, it has been investigated that the influence of three functional fillings and silicone resin on the performance of the antifouling coatings with low surface energy. The erosion rate of the coatings was measured by the samples rotated 72h at the 12 knots of simulating sailing speed. The results showed that the roughness of coatings changes from 0.2um to 3um, it does influenced slightly by the rotating test. Water contact angle of all coatings is about 100° before rotating test. It decreases to about 70° after the rotating test in seawater. Due to the increase of surface energy of the coatings, both the amount of diatom and bacteria on samples increases after rotating test in seawater.

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Cytocompatibility of Carbon Nanofiber Materials for Neural Applications

MRS Proceedings ◽

10.1557/proc-774-o7.35 ◽

2003 ◽

Vol 774 ◽

Author(s):

Janice L. McKenzie ◽

Michael C. Waid ◽

Riyi Shi ◽

Thomas J. Webster

Keyword(s):

Carbon Fiber ◽

Surface Energy ◽

Carbon Nanofibers ◽

Carbon Fibers ◽

Carbon Nanofiber ◽

Fiber Composite ◽

Scar Tissue ◽

Pc 12 Cells ◽

Low Surface Energy ◽

Poly Carbonate

AbstractSince the cytocompatibility of carbon nanofibers with respect to neural applications remains largely uninvestigated, the objective of the present in vitro study was to determine cytocompatibility properties of formulations containing carbon nanofibers. Carbon fiber substrates were prepared from four different types of carbon fibers, two with nanoscale diameters (nanophase, or less than or equal to 100 nm) and two with conventional diameters (or greater than 200 nm). Within these two categories, both a high and a low surface energy fiber were investigated and tested. Astrocytes (glial scar tissue-forming cells) and pheochromocytoma cells (PC-12; neuronal-like cells) were seeded separately onto the substrates. Results provided the first evidence that astrocytes preferentially adhered on the carbon fiber that had the largest diameter and the lowest surface energy. PC-12 cells exhibited the most neurites on the carbon fiber with nanodimensions and low surface energy. These results may indicate that PC-12 cells prefer nanoscale carbon fibers while astrocytes prefer conventional scale fibers. A composite was formed from poly-carbonate urethane and the 60 nm carbon fiber. Composite substrates were thus formed using different weight percentages of this fiber in the polymer matrix. Increased astrocyte adherence and PC-12 neurite density corresponded to decreasing amounts of the carbon nanofibers in the poly-carbonate urethane matrices. Controlling carbon fiber diameter may be an approach for increasing implant contact with neurons and decreasing scar tissue formation.

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Corrigendum to “Fabrication superhydrophobic composite membranes with hierarchical geometries and low-surface-energy modifications” [Polymer 211 (2020) 123097]

Polymer ◽

10.1016/j.polymer.2021.123481 ◽

2021 ◽

Vol 217 ◽

pp. 123481

Author(s):

Zhanhui Gan ◽

Deyu Kong ◽

Qianqian Yu ◽

Yifan Jia ◽

Xue-Hui Dong ◽

...

Keyword(s):

Surface Energy ◽

Composite Membranes ◽

Low Surface Energy

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Automated pick-and-place of single nanoparticle using electrically controlled low-surface energy nanotweezer

AIP Advances ◽

10.1063/5.0041145 ◽

2021 ◽

Vol 11 (3) ◽

pp. 035219

Author(s):

Ya-Kun Lyu ◽

Zuo-Tao Ji ◽

Tao He ◽

Zhenda Lu ◽

Weihua Zhang

Keyword(s):

Surface Energy ◽

Low Surface Energy ◽

Single Nanoparticle ◽

Pick And Place

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Fabrication and Evaluation of Nano-TiO2 Superhydrophobic Coating on Asphalt Pavement

Materials ◽

10.3390/ma14010211 ◽

2021 ◽

Vol 14 (1) ◽

pp. 211

Author(s):

Hongfeng Li ◽

Xiangwen Lin ◽

Hongguang Wang

Keyword(s):

Contact Angle ◽

Stearic Acid ◽

Asphalt Pavement ◽

Asphalt Mixture ◽

Waterborne Polyurethane ◽

Superhydrophobic Coating ◽

Nano Tio2 ◽

Sem Image ◽

Low Surface Energy ◽

Water Damage

In order to address water damage of asphalt pavement, reduce the occurrence of water-related potholes, deformation, and other diseases, and improve the performance and service life of the pavement, a nano-TiO2 superhydrophobic coating (PSC) on asphalt pavement was prepared from waterborne polyurethane and nano-TiO2 modified by stearic acid. FT-IR measured stearic acid successfully modified low surface energy substance on the surface of nano-TiO2. The SEM image shows that the PSC has a rough surface structure. The contact angle and rolling angle of the PSC in the contact angle test are 153.5° and 4.7°, respectively. PSC has a super-hydrophobic ability, which can improve the water stability of the asphalt mixture. Although the texture depth and pendulum value have been reduced by 2.5% and 4.4%, respectively, they all comply with the standard requirements. After the abrasion resistance test, the PSC coating still has a certain hydrophobic ability. These results surface PSC coating can effectively reduce water damage on asphalt pavement, and has considerable application value.

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