Fouling-Release Properties of Dendritic Polyglycerols against Marine Diatoms

Wanka, Robin; Finlay, John A.; Nolte, Kim A.; Koc, Julian; Jakobi, Victoria; Anderson, Charlotte; Clare, Anthony S.; Gardner, Harrison; Hunsucker, Kelli Z.; Swain, Geoffrey; Rosenhahn, Axel

doi:10.1021/acsami.8b12017

Cited by 24 publications

(47 citation statements)

References 52 publications

(124 reference statements)

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“…In tests against the marine diatom N. incerta, all HMs showed higher initial settlement than the hydrophobic reference, which was unexpected. 28,47 After the hybrid surfaces were exposed to a turbulent water flow, the most hydrophobic hybrid, CH, had the lowest performance of all hybrid coatings with a slightly higher removal (43 ± 3 %) than found on the hydrophilic glass references (42 ± 1 %). All other hybrids were highly hydrophilic (WCA <10°) and showed higher removal between 52 ± 4 % for HA and 76 ± 2 % for HEP/CS.…”

Section: Discussionmentioning

confidence: 99%

“…Hydrophobic silane monolayers consisting of OTS were prepared as negative references because they are known to induce high settlement in fouling assays. 28,44,47 CH-based HM showed a very low roughness (root mean square, RMS) of only 0.2 nm with structures only on the nanoscale. HA and CS revealed a very fine, porous morphology with randomly distributed spots and a roughness of ≈10 nm (Figure 2).…”

Section: Hybrid Materials Coating Preparation and Characterizationmentioning

confidence: 99%

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Sol–Gel-Based Hybrid Materials as Antifouling and Fouling-Release Coatings for Marine Applications

Wanka

Koc

Clarke

et al. 2020

ACS Appl. Mater. Interfaces

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Hybrid materials (HMs) offer unique properties as they combine inorganic and organic components into a single material. Here we developed HM coatings for marine antifouling applications using sol-gel chemistry and naturally occurring polysaccharides. The coatings were characterized by spectroscopic ellipsometry, contact angle goniometry, AFM, ATR-FTIR, and their stability was tested in saline media. Marine antifouling and fouling-release properties were tested in laboratory assays against the settlement of larvae of the barnacle Balanus improvisus and against the settlement and removal of the diatom Navicula incerta. Furthermore, laboratory data were confirmed in short-term dynamic field assays in Florida, USA. All hybrid coatings revealed a superior performance in the assays compared to a hydrophobic reference. Within the hybrids, those with the highest degree of hydrophilicity and negative net charge across the surface performed best. Alginate and heparin showed good performance making these hybrid materials promising building blocks for fouling-resistant coatings.

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Section: Discussionmentioning

confidence: 99%

Section: Hybrid Materials Coating Preparation and Characterizationmentioning

confidence: 99%

Sol–Gel-Based Hybrid Materials as Antifouling and Fouling-Release Coatings for Marine Applications

Wanka

Koc

Clarke

et al. 2020

ACS Appl. Mater. Interfaces

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“…The greater longevity could be another explanation of female's higher epibiotic infestation if the epibiont really increase accumulatively with copepod age. Diatom biofouling has been extensively studied in the context of anti-fouling coating or substance applications (Molino et al, 2009;Al-Naamani et al, 2017;Wanka et al, 2018). The mechanism of diatom fouling on zooplankton was rarely studied.…”

Section: Discussionmentioning

confidence: 99%

Effects of Epibiotic Diatoms on the Productivity of the Calanoid Copepod Acartia tonsa (Dana) in Intensive Aquaculture Systems

et al. 2021

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We evaluated here the effects of the epibiotic diatom Tabularia sp. on the productivity of the calanoid copepod Acartia tonsa (Dana) for assessing their risk on copepod intensive aquaculture industry for the provision of live feed. In the first experiment, uninfested and intensively infested females were cultivated individually for the assessment of egg production. Intensively infested females appeared to have a significantly lower egg production (5.0–9.0 eggs/female/d) than uninfested females (22.0–26.0 eggs/female/d) during 5 consecutive days. In the second experiment, effects of culture densities on diatom epibiosis were investigated in 9 L cultures at three different densities (200, 400, and 600 ind. L–1). Another culture at higher volume (250 L) and lowest density (200 ind. L–1) was also carried out to test the effect of culture volume on diatom epibiosis. The infestation rate (%), infestation intensity (ratio of surface diatom coverage levels, classified as levels 0–3) and daily egg harvest rate (number of harvested eggs per day per liter) were evaluated among the four culture populations. The copepods had higher infestation rate (53.69–60.14%) and intensity rate (high ratios at level 2 and 3) when the densities were increased from 200 ind./L to 400 and 600 ind./L. Although egg harvest increased with increasing culture density, it seemed that the diatom-infested A. tonsa population reach a saturated egg production when the density was higher than 400 ind./L. Nevertheless, the differences of culture volumes (250 and 9 L) appeared to be not to have any effect when the copepods were cultivated at the same density (200 ind./L). This study reveals for the first time that the epibiosis of the diatom Tabularia sp. reduces the individual egg production, and egg harvest rate in high-density culture of the copepod A. tonsa. Our findings implicate that diatom epibiosis should be avoid in copepod intensive culture systems.

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“…The authors note here that surface sloughing appears to be an efficient antifouling mechanism for these species, being one of the major factors affecting epiphytic diatom communities, preventing development of the climax stage of community development. Diatoms are a fouling group of interest from a biomimetic perspective in their own right [54], even if they are a particularly difficult biofouling group to control [55], and much work continues on understanding the mechanisms of diatom adhesion [56].…”

Section: Natural Products and Biomimetic Chemistriesmentioning

confidence: 99%

Recent Developments in Biomimetic Antifouling Materials: A Review

Sullivan

O’Callaghan

2020

Biomimetics

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The term ‘biomimetic’ might be applied to any material or process that in some way reproduces, mimics, or is otherwise inspired by nature. Also variously termed bionic, bioinspired, biological design, or even green design, the idea of adapting or taking inspiration from a natural solution to solve a modern engineering problem has been of scientific interest since it was first proposed in the 1960s. Since then, the concept that natural materials and nature can provide inspiration for incredible breakthroughs and developments in terms of new technologies and entirely new approaches to solving technological problems has become widely accepted. This is very much evident in the fields of materials science, surface science, and coatings. In this review, we survey recent developments (primarily those within the last decade) in biomimetic approaches to antifouling, self-cleaning, or anti-biofilm technologies. We find that this field continues to mature, and emerging novel, biomimetic technologies are present at multiple stages in the development pipeline, with some becoming commercially available. However, we also note that the rate of commercialization of these technologies appears slow compared to the significant research output within the field.

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Fouling-Release Properties of Dendritic Polyglycerols against Marine Diatoms

Cited by 24 publications

References 52 publications

Sol–Gel-Based Hybrid Materials as Antifouling and Fouling-Release Coatings for Marine Applications

Sol–Gel-Based Hybrid Materials as Antifouling and Fouling-Release Coatings for Marine Applications

Effects of Epibiotic Diatoms on the Productivity of the Calanoid Copepod Acartia tonsa (Dana) in Intensive Aquaculture Systems

Recent Developments in Biomimetic Antifouling Materials: A Review

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