Smart functional polymer coatings for paper with anti-fouling properties

Münch, Alexander S.; Wölk, Michele; Malanin, Mikhail; Eichhorn, Klaus‐Jochen; Simon, Frank; Uhlmann, Petra

doi:10.1039/c7tb02886e

Cited by 25 publications

(11 citation statements)

References 77 publications

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“…To obtain a clearer chemical picture of the abstraction, we carried out XPS measurements. We prepared a sample featuring a submonolayer coverage (∼0.5 ML) of TMS‐TEB on Cu(111) and investigated the C 1s and the Si 2p regions for annealing temperatures up to 500 K. For the 300 K case, the Si 2p spectra (Figure a, blue) are dominated by the spin‐orbit split double feature of a single TMS group at a binding energy of 100.5 eV for the 2p 3/2 peak that is in agreement with carbon‐bound TMS groups . After 450 K annealing (green), the peak intensity is reduced by more than two thirds indicating that Si‐containing groups desorb from the surface.…”

Section: Resultsmentioning

confidence: 81%

“…After 450 K annealing (green), the peak intensity is reduced by more than two thirds indicating that Si‐containing groups desorb from the surface. After 500 K annealing, approximately 25 % of the signal remain, featuring a binding energy of 99.2 eV typical for atomic and neutral Si atoms . Furthermore, we quantified the ratio by which the integrated counts decreased for the C 1s region (Figure S6).…”

Section: Resultsmentioning

confidence: 99%

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On‐Surface Activation of Trimethylsilyl‐Terminated Alkynes on Coinage Metal Surfaces

Zhang

Chen

et al. 2019

ChemPhysChem

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The controlled attachment of protecting groups combined with the ability to selectively abstract them is central to organic synthesis. The trimethylsilyl (TMS) functional group is a popular protecting group in solution. However, insights on its activation behavior under ultra-high vacuum (UHV) and surface-confined conditions are scarce. Here we investigate a series of TMSprotected alkyne precursors via scanning tunneling microscopy (STM) regarding their compatibility with organic molecular beam epitaxy (OMBE) and their potential deprotection on various coinage metal surfaces. After in-situ evaporation on the substrates held in UHV at room temperature, we find that all molecules arrived and adsorbed as intact units forming ordered supramolecular aggregates stabilized by non-covalent interac-tions. Thus, TMS-functionalized alkyne precursors with weights up to 1100 atomic mass units are stable against OMBE evaporation in UHV. Furthermore, the TMS activation through thermal annealing is investigated with STM and X-ray photoelectron spectroscopy (XPS). We observe that deprotection starts to occur between 400 K and 500 K on the copper and gold surfaces, respectively. In contrast, on silver surfaces, the TMS-alkyne bond remains stable up to temperatures where molecular desorption sets in ( � 600 K). Hence, TMS functional groups can be utilized as leaving groups on copper and gold surfaces while they serve as protecting groups on silver surfaces.

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Section: Resultsmentioning

confidence: 81%

Section: Resultsmentioning

confidence: 99%

On‐Surface Activation of Trimethylsilyl‐Terminated Alkynes on Coinage Metal Surfaces

Zhang

Chen

et al. 2019

ChemPhysChem

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“…Cellulose, which can be observed in all the plant structures, is a common example of a renewable natural resource and offers the advantages of abundant availability, renewability, and biodegradability [2,3]. With the development of nanotechnology, nanocellulose, prepared from cellulose, has attracted significant attention from academic and industrial researchers because of its low cost, biocompatibility, biodegradability, nontoxicity, renewability, sustainability, strong surface reactivity, and desirable physical properties (it is lightweight and impermeable to gas and it also exhibits high stiffness, good optical transparency, and low thermal expansion) [4,5]. Compared with cellulose, nanocellulose exhibits large surface area, high crystallinity, high mechanical strength, high hydrophilicity and supramolecular structure [6].…”

Section: Introductionmentioning

confidence: 99%

Isolation and Characterization of Nanocellulose with a Novel Shape from Walnut (Juglans Regia L.) Shell Agricultural Waste

et al. 2019

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Herein, walnut shell (WS) was utilized as the raw material for the production of purified cellulose. The production technique involves multiple treatments, including alkaline treatment and bleaching. Furthermore, two nanocellulose materials were derived from WS by 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO) oxidation and sulfuric acid hydrolysis, demonstrating the broad applicability and value of walnuts. The micromorphologies, crystalline structures, chemical functional groups, and thermal stabilities of the nanocellulose obtained via TEMPO oxidation and sulfuric acid hydrolysis (TNC and SNC, respectively) were comprehensively characterized. The TNC exhibited an irregular block structure, whereas the SNC was rectangular in shape, with a length of 55–82 nm and a width of 49–81 nm. These observations are expected to provide insight into the potential of utilizing WSs as the raw material for preparing nanocellulose, which could address the problems of the low-valued utilization of walnuts and pollution because of unused WSs.

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“…The chemical, physical, mechanical, and structural properties, the mass (elastic modulus, coating thickness, etc. ), and topography (i.e., the physical constraints) of the covered surface are all equally important parameters, as they will determine the character of the AF coating itself and the life span of the applied material [ 22 , 23 ]. The coatings designed to solve these needs are usually silicones- and fluoro-polymers based on the strategy of separation of biofoulants [ 24 , 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Design and Development of Fluorinated and Biocide-Free Sol–Gel Based Hybrid Functional Coatings for Anti-Biofouling/Foul-Release Activity

Sfameni

Rando

Galletta

et al. 2022

Gels

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Biofouling has destructive effects on shipping and leisure vessels, thus producing severe problems for marine and naval sectors due to corrosion with consequent elevated fuel consumption and higher maintenance costs. The development of anti-fouling or fouling release coatings creates deterrent surfaces that prevent the initial settlement of microorganisms. In this regard, new silica-based materials were prepared using two alkoxysilane cross-linkers containing epoxy and amine groups (i.e., 3-glycidyloxypropylmethyldiethoxysilane and 3-aminopropyltriethoxysilane, respectively), in combination with two functional fluoro-silane (i.e., 3,3,3-trifluoropropyl-trimethoxysilane and glycidyl-2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9-hexadecafluorononylether) featuring well-known hydro repellent and anti-corrosion properties. As a matter of fact, the co-condensation of alkoxysilane featuring epoxide and amine ends, also mixed with two opportune long chain and short chain perfluorosilane precursors, allows getting stable amphiphilic, non-toxic, fouling release coatings. The sol–gel mixtures on coated glass slides were fully characterized by FT-IR spectroscopy, while the morphology was studied by scanning electron microscopy (SEM), and atomic force microscopy (AFM). The fouling release properties were evaluated through tests on treated glass slides in different microbial suspensions in seawater-based mediums and in seawater natural microcosms. The developed fluorinated coatings show suitable antimicrobial activities and low adhesive properties; no biocidal effects were observed for the microorganisms (bacteria).

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Smart functional polymer coatings for paper with anti-fouling properties

Abstract: Preparation of functionalized cellulose films on SiO2 to introduce protein repellent properties evaluated by spectroscopic in situ ellipsometry.

Cited by 25 publications

References 77 publications

On‐Surface Activation of Trimethylsilyl‐Terminated Alkynes on Coinage Metal Surfaces

On‐Surface Activation of Trimethylsilyl‐Terminated Alkynes on Coinage Metal Surfaces

Isolation and Characterization of Nanocellulose with a Novel Shape from Walnut (Juglans Regia L.) Shell Agricultural Waste

Design and Development of Fluorinated and Biocide-Free Sol–Gel Based Hybrid Functional Coatings for Anti-Biofouling/Foul-Release Activity

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