Polysilazane‐Based Coatings with Anti‐Adherent Properties for Easy Release of Plastics and Composites from Metal Molds

Barroso, Gilvan; Döring, M.; Horcher, Alexander; Kienzle, Andreas; Motz, Günter

doi:10.1002/admi.201901952

Cited by 32 publications

(31 citation statements)

References 43 publications

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“…The development of antifouling coatings with hydrophobic character was also focused in recent years on “non-conventional” polymers. Barroso et al [ 65 ] investigated coatings based on pure polysilazane or loaded with poly(tetrafluoroethylene) (PTFE) particles. Such systems possess a higher amount of nonpolar organic groups resulting in a low surface free energy that was further lowered by the addition of PTFE fillers.…”

Section: Other Systemsmentioning

confidence: 99%

Mechanical Properties of Protective Coatings against Marine Fouling: A Review

2021

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The accumulation of marine organisms on ship hulls, such as microorganisms, barnacles, and seaweeds, represents a global problem for maritime industries, with both economic and environmental costs. The use of biocide-containing paints poses a serious threat to marine ecosystems, affecting both target and non-target organisms driving science and technology towards non-biocidal solutions based on physico-chemical and materials properties of coatings. The review reports recent development of hydrophobic protective coatings in terms of mechanical properties, correlated with the wet ability features. The attention is focused mainly on coatings based on siloxane and epoxy resin due to the wide application fields of such systems in the marine industry. Polyurethane and other systems have been considered as well. These coatings for anti-fouling applications needs to be both long-term mechanically stable, perfectly adherent with the metallic/composite substrate, and capable to detach/destroy the fouling organism. Prospects should focus on developing even “greener” antifouling coatings solutions. These coatings should also be readily addressable to industrial scale-up for large-scale product distribution, possibly at a reasonable cost.

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Section: Other Systemsmentioning

confidence: 99%

Mechanical Properties of Protective Coatings against Marine Fouling: A Review

2021

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“…A similar tendency describing the change in contact angle with curing time for all coatings can be observed. Consider the D1500-rc coating as an example, the hydrophobic groups, such as, Si H 16 and Si CH 3 23 result in a hydrophobic surface with a contact angle of 94.6 ± 0.5 .…”

Section: Hydrophobicity Of Polysilazane Coatingsmentioning

confidence: 99%

“…The adhesion of polysilazane to most surfaces is known to be good due to the chemical reactions of Si H, Si NH groups with the OH groups and the adsorbed water molecules on surface, which form subsequently oxygen bridges between the polysilazane coating and the substrate. 16,39,40 Figure 9 shows the optical microscopy images of five polysilazane coatings cured after 1, 3, and 7 days and with the standard cross-cut tape test being performed. According to the DIN EN ISO 2409, coatings are classified from Gt 0 (best adhesion, without any detachment of the coating after the test) to Gt 5 (worst adhesion, detachment of the coating >65% of the tested area).…”

Section: Adhesion Of Polysilazane Coatings To Polycarbonate Substratementioning

confidence: 99%

“…In recent years, low temperature curing of polysilazane-based coatings has been studied for applications, such as, gas barrier, 13 marine anti-fouling coating, 14 anti-graffiti coating for public transportation, 15 and anti-adherent coating for demolding. 16 Polysilazane coatings can be cured and converted into thermoset polymeric coatings by several types of treatment, such as, thermal crosslinking, 17 UV radiation, 18 O 2 plasma treatment, 19 and moisture curing by hydrolysis and condensation reactions. 20 Studies have been undertaken to explore in detail the low-temperature curing behavior and mechanism of polysilazane coatings.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of mechanical properties and hydrophobicity of room‐temperature, moisture‐curable polysilazane coatings

Zhan

Grottenmüller

et al. 2021

J of Applied Polymer Sci

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Polysilazane coatings have a broad need in real-life applications, which require low processing or working temperature. In this work, five commercially available polysilazanes have been spin-coated on polycarbonate substrates and cured in ambient environment and temperature to obtain transparent, crack-free, and dense films. The degree of crosslinking is found to have a significant impact on the hardness and Young's modulus of the polysilazane films but has a minor influence on the film thickness and hydrophobicity. Among all five polysilazane coatings, the inorganic perhydropolysilazane-based coating exhibits the largest hardness (2.05 ± 0.01 GPa) and Young's modulus (10.76 ± 0.03 GPa) after 7 days of curing, while the polyorganosilazane-derived films exhibit higher hydrophobicity. The molecular structure of polysilazanes plays a key role in mechanical properties and hydrophobicity of the associated films, as well as the adhesion of coatings to substrates, providing an intuitive and reliable way for selecting a suitable polysilazane coating material for a specific application.

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“…They belong to the group of biomaterials used in prosthetic devices such as implant for breast enlargement, tissue augmentation and for treatment of hydrocephalus 49 . Although few experiments concerning the corrosion studies of polysilazane‐based surface coatings have indicated an excellent corrosion and oxidation resistance and more hydrophobicity, the in vitro performance of such coatings for biomedical applications are still far from being concluded 50,51 . Hoffmann and coworkers 52 studied two types of coatings, that is, sol–gel coatings (TiO 2 ) and precursor‐derived coatings in the system SiCN (Ti) on medical alloys (Ti6Al4V and Co28Cr6Mo alloy) for their biocompatibility and hindrance to toxic ions release from metal alloys.…”

Section: Surface Modification To Produce Biocompatible and Corrosion mentioning

confidence: 99%

Biological evaluation of preceramic organosilicon polymers for various healthcare and biomedical engineering applications: A review

Francis

2020

J Biomed Mater Res

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Preceramic organosilicon materials combining the properties of a polymer and an inorganic ceramic phase are of great interest to scientists working in biomedical sciences. The interdisciplinary nature of organosilicon polymers and their molecular structures, as well as their diversity of applications have resulted in an unprecedented range of devices and synergies cutting across unrelated fields in medicine and engineering. Organosilicon materials, especially the polysiloxanes, have a long history of industrial and medical uses in many versatile aspects as they can be easily fabricated into complex‐shaped products using a wide variety of computer‐aided or polymer manufacturing techniques. Thus far, intensive research activities have been mainly devoted to the processing of preceramic organosilicon polymers toward magnetic, electronic, structural, optical, and not biological applications. Herein we present innovative research studies and recent developments of preceramic organosilicon polymers at the interface with biological systems, displaying the versatility and multi‐functionality of these materials. This article reviews recent research on preceramic organosilicon polymers and corresponding composites for bone tissue regeneration and medical engineering implants, focusing on three particular topics: (a) surface modifications to create tailorable and bioactive surfaces with high corrosion resistance and improved biological properties; (b) biological evaluations for specific applications, such as in glaucoma drainage devices, orthopedic implants, bone tissue regeneration, wound dressing, drug delivery systems, and antibacterial activity; and (c) in vitro and in vivo studies for cytotoxicity, genotoxicity, and cell viability. The interest in organosilicon materials stems from the fact that a vast array of these materials have complementary attributes that, when integrated appropriately with functional fillers and carefully controlled conditions, could be exploited either as polymeric Si‐based composites or as organosilicon polymer‐derived Si‐based ceramic composites to tailor and optimize properties of the Si‐based materials for various proposed applications.

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Polysilazane‐Based Coatings with Anti‐Adherent Properties for Easy Release of Plastics and Composites from Metal Molds

Cited by 32 publications

References 43 publications

Mechanical Properties of Protective Coatings against Marine Fouling: A Review

Mechanical Properties of Protective Coatings against Marine Fouling: A Review

Evaluation of mechanical properties and hydrophobicity of room‐temperature, moisture‐curable polysilazane coatings

Biological evaluation of preceramic organosilicon polymers for various healthcare and biomedical engineering applications: A review

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