Universal Intraductal Surface Antifouling Coating Based on an Amphiphilic Copolymer

We generated stable amphiphilic copolymer-based polymeric micelles (PMs) with temperature-responsive properties utilizing Pluronic® L35 and a variety of ionic liquids (ILs) to generate different aqueous two-phase micellar systems (ATPMSs). The...

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TiO2 antifouling coating based on epoxy-modified tung oil waterborne resin

Polymers and Polymer Composites ◽

10.1177/09673911211011123 ◽

2021 ◽

pp. 096739112110111

Author(s):

Hailiang Hu ◽

Minmin Chen ◽

Mengye Cao

Keyword(s):

Escherichia Coli ◽

Staphylococcus Aureus ◽

Antimicrobial Activity ◽

Survival Rate ◽

Light Irradiation ◽

Fouling Resistance ◽

Tung Oil ◽

E Coli ◽

Antifouling Coating ◽

Waterborne Epoxy

The eco-friendly functionalized TiO2/polymer antifouling (AF) coating was successfully synthesized by dispersing TiO2 nanoparticles in waterborne epoxy-modified tung oil resin. The AF effectiveness of coating was evaluated toward Staphylococcus aureus ( S. aureus, ATCC6538), Escherichia coli ( E. coli, ATCC8739) and diatom ( Cyclotella sp., FACHB-1635). The nanoTiO2/polymer AF coating showed good antimicrobial activity both under the light and dark conditions by comparison with the pristine TiO2 nanoparticles and bulk polymer. Under light irradiation for 50 min, the AF coating showed only 8.4% and 8% survival rate for S. aureus and E. coli. In addition, The AF coatings exhibited favorable inhibition efficacy toward the growth and adhesion of Cyclotella sp., and the efficacy was enhanced with the increase of TiO2 content. It can be concluded that TiO2 nanoparticles endow the AF coatings with promoted fouling resistance properties.

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Highly Efficient Antifouling Coating of Star-Shaped Block Copolymers with Variable Sizes of Hydrophobic Cores and Charge-Neutral Hydrophilic Arms

ACS Applied Polymer Materials ◽

10.1021/acsapm.0c01334 ◽

2021 ◽

Vol 3 (2) ◽

pp. 1116-1134

Author(s):

Muhammad Amirul Islam ◽

Jae-Young Cho ◽

Khalid Azyat ◽

Farshad Mohammadtabar ◽

Feng Gao ◽

...

Keyword(s):

Block Copolymers ◽

Highly Efficient ◽

Antifouling Coating ◽

Hydrophobic Cores

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Flexible and Transparent Polymer-Based Optical Humidity Sensor

Sensors ◽

10.3390/s21113674 ◽

2021 ◽

Vol 21 (11) ◽

pp. 3674

Author(s):

Katerina Lazarova ◽

Silvia Bozhilova ◽

Sijka Ivanova ◽

Darinka Christova ◽

Tsvetanka Babeva

Keyword(s):

Humidity Sensor ◽

Amphiphilic Copolymer ◽

Poly Vinyl Alcohol ◽

Optical Monitoring ◽

Optical Contrast ◽

Successful Development ◽

Flexible Sensor ◽

Surface Profiling ◽

Humidity Range ◽

Different Levels

Thin spin-coated polymer films of amphiphilic copolymer obtained by partial acetalization of poly (vinyl alcohol) are used as humidity-sensitive media. They are deposited on polymer substrate (PET) in order to obtain a flexible humidity sensor. Pre-metallization of substrate is implemented for increasing the optical contrast of the sensor, thus improving the sensitivity. The morphology of the sensors is studied by surface profiling, while the transparency of the sensor is controlled by transmittance measurements. The sensing behavior is evaluated through monitoring of transmittance values at different levels of relative humidity gradually changing in the range 5–95% and the influence of up to 1000 bending deformations is estimated by determining the hysteresis and sensitivity of the flexible sensor after each set of deformations. The successful development of a flexible sensor for optical monitoring of humidity in a wide humidity range is demonstrated and discussed.

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