Photoinduced thiol-ene “click” chemistry for resource-efficient curing of polysilazane-based coatings and its effects on coating property profile

Hoffmann, Michael R.; Zahedtalaban, Mohamad; Denk, Jakob; Horcher, Alexander; Ruckdäschel, Holger; Schafföner, Stefan; Motz, Günter

doi:10.1016/j.oceram.2023.100384

Cited by 2 publications

(6 citation statements)

References 39 publications

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“…In the traditional prepreg processing for laminate composites, the precise regulation of temperature and time during thermal curing should be carried out cautiously to ensure optimal resin–fiber contact and minimize pore formation . By employing the photocuring prepreg process, a prepreg with high quality can be cost-efficiently fabricated through the convenient adjustment of light power and the exposure duration at ambient temperature. , In this paper, the single-component photocurable ALSZ offers a competitive solution for prepreg processing in the manufacture of laminate composites.…”

Section: Resultsmentioning

confidence: 99%

“… 28 By employing the photocuring prepreg process, 29 a prepreg with high quality can be cost-efficiently fabricated through the convenient adjustment of light power and the exposure duration at ambient temperature. 19 , 20 In this paper, the single-component photocurable ALSZ offers a competitive solution for prepreg processing in the manufacture of laminate composites.…”

Section: Resultsmentioning

confidence: 99%

“…Chen et al presented a novel strategy for fabricating lightweight SiCN amorphous ceramics with electrical semiconducting behaviors through digital light processing (DLP) . Hoffmann et al investigated the resource-efficient curing of polyorganosilazane-based coating via photocuring . Dandan Ren et al studied the influences of the bifunctional acrylic reactive diluent tripropylene glycol diacrylate content, photoinitiator concentration, and temperature on the UV-curing polymerization rate and conversion percentage of the liquid polyborosilazane .…”

Section: Introductionmentioning

confidence: 99%

“… 19 Hoffmann et al investigated the resource-efficient curing of polyorganosilazane-based coating via photocuring. 20 Dandan Ren et al studied the influences of the bifunctional acrylic reactive diluent tripropylene glycol diacrylate content, photoinitiator concentration, and temperature on the UV-curing polymerization rate and conversion percentage of the liquid polyborosilazane. 21 Currently, the photocuring of polysilazanes is typically achieved through the blending of vinyl-containing polysilazanes and photocurable resins (such as acrylate), resulting in a multicomponent system.…”

Section: Introductionmentioning

confidence: 99%

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Catalytic Thermocuring and Synergistic Photothermocuring of Single-Component Acrylate-Grafted Liquid Oligosilazanes

Pei,

Li,

Cao

et al. 2024

ACS Omega

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A novel thermosetting preceramic resin called acrylate-grafted liquid polysilazane (ALSZ) was readily synthesized. The curing behaviors of ALSZ were investigated by the techniques of differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and rheological tests. The catalytic thermocuring process was controlled by the addition of a polymerization accelerator composed of a radical initiator (cumene hydroperoxide) and a transition metal catalyst (nickel naphthenate or cobalt naphthenate). Photocuring at room temperature can proceed readily by the addition of photosensitizer 819 (phenylbis(2,4,6-trimethylbenzoyl) phosphine oxide). By combining a radical initiator, a transition metal catalyst, and a photosensitizer, synergistic photothermocuring was achieved, demonstrating advantages such as material shaping at room temperature and low weight loss during curing. The ceramization of the solidified ceramic precursors in an Ar atmosphere was studied using TGA and tube furnace pyrolysis. ALSZs exhibited comparatively high ceramic transformation yields (71–75% at 800 °C). The resulting pyrolytic ceramics maintained their original shape without deformation or foaming expansion. Polysilazanes containing acrylate groups can directly form casting bodies, showing a high static glass transition temperature (>380 °C) by thermomechanical analysis (TMA). FT-IR analyses revealed that multiple reactions are involved in the curing of ALSZ. The results in this paper showed that ALSZ might find prospective applications in material processing, such as additive manufacturing and ceramic–matrix composites.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Catalytic Thermocuring and Synergistic Photothermocuring of Single-Component Acrylate-Grafted Liquid Oligosilazanes

Pei,

Li,

Cao

et al. 2024

ACS Omega

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“…Polymer-derived ceramics (PDCs) are an outstanding class of material due to their ease of processability since they are processed in the same way as polymers, unlike standard ceramic materials [1]. They also offer several desirable characteristics, including thermal and chemical stability [2], excellent adherence to multiple surfaces [3][4][5], and the tunability of material properties. These characteristics allow for their use in a wide range of applications in micro-electro-mechanical systems (MEMS), biomedical implants, harsh environment sensors, and fuel cells [6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Development of Inkjet Printable Formulations Based on Polyorganosilazane and Divinylbenzene

Qazzazie-Hauser,

Honnef,

Hanemann

2023

Polymers

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Within this work, ink formulations based on polyorganosilazane (OPSZ) and divinylbenzene (DVB) were developed to be processed by inkjet printing. The formulations were studied regarding their rheological, structural, and thermal properties. The rheological results show that the new formulations meet the requirements of the inkjet printer by showing both low viscosity (below 20 mPa∙s at printing temperature) and Newtonian flow behavior even at high shear rates. Additionally, the inks have surface tensions in the range of 21 to 26 mN/m2. First, printing experiments of single layers were successfully conducted and show that the developed formulations can be processed by inkjet printing. The inks were crosslinked by UV light and then pyrolyzed at 1100 °C resulting in a ceramic yield between 75 and 42%, depending on the ink formulation. The crosslinking behavior was studied via FTIR spectroscopy, and the results reveal that crosslinking occurs mainly via free-radical polymerization of the vinyl group. Furthermore, the results indicate that silicon carbonitride (SiCN) was formed after the pyrolysis. The results of the electrical properties of the amorphous ceramics differ in dependence on the amount of DVB in the formulation. A maximum electrical conductivity of 1.2 S/cm−1 was observed for a UV-cured sample with a high amount of DVB pyrolyzed at 1100 °C. The generation in electrical conductivity is given by the formation of free carbon derived most likely by DVB.

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Photoinduced thiol-ene “click” chemistry for resource-efficient curing of polysilazane-based coatings and its effects on coating property profile

Cited by 2 publications

References 39 publications

Catalytic Thermocuring and Synergistic Photothermocuring of Single-Component Acrylate-Grafted Liquid Oligosilazanes

Catalytic Thermocuring and Synergistic Photothermocuring of Single-Component Acrylate-Grafted Liquid Oligosilazanes

Development of Inkjet Printable Formulations Based on Polyorganosilazane and Divinylbenzene

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