UV-curable self-healing polyurethane coating based on thiol-ene and Diels-Alder double click reactions

Wang, Zhengyue; Liang, Hongbo; Yang, Haitao; Xiong, Lei; Zhou, Jianping; Huang, Shengmei; Zhao, Chunhui; Zhong, Jiang; Fan, Xueliang

doi:10.1016/j.porgcoat.2019.105282

Cited by 46 publications

(40 citation statements)

References 28 publications

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“…However, the most common photo polymerization method is film photopolymerization (radical or cationic), for example photopolymerization of acrylates, epoxides, vinyl ethers. This type of photopoly merization is mainly used for cross-linking of polymeric materials, such as: varnishes, hydrogels, dental fillings, printing inks and adhesives [8][9][10][11][12][13]. Photopolymerization in film is extremely effective, especially radical photopoly merization of multifunctional monomers and oligomers is very fast -in seconds, with the help of light, a viscous liquid turns into a solid.…”

Section: Wpływ Fotoinicjatorów Na Właściwości Poliakrylanowych Syropów I Klejów Samoprzylepnychmentioning

confidence: 99%

Influence of radical photoinitiators on features of polyacrylate syrups and self-adhesives

Gziut

Kowalczyk

2020

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Pressure-sensitive adhesives (PSAs) were prepared via UV-irradiaton of an acrylic syrups with reactive diluent (functional diacrylate) and photoinitiator. The acrylic syrups were received via free radical bulk polymerization process (FRBP) and influence of radical photoinitiator (α-hydroxyketones, acylphosphine oxides or mixtures thereof) was investigated. It was revealed that the mixture of bisacylphosphine oxide (Omnirad 819) and α-hydroxyketone (Omnirad 184) was the most effective in FRBP (the highest monomer conversion), but preferable features of acrylic syrups (viscosity and molecular weight of copolymers) and self-adhesive properties of PSAs (especially cohesion) was achieved due to α-hydroxyketones using.

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Section: Wpływ Fotoinicjatorów Na Właściwości Poliakrylanowych Syropów I Klejów Samoprzylepnychmentioning

confidence: 99%

Influence of radical photoinitiators on features of polyacrylate syrups and self-adhesives

Gziut

Kowalczyk

2020

Polimery

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“…It should be noted that the short time for immersion was necessary to preserve structure of PUR nanofibers. It is well known that polar polymer PUR is not resistant to polar solvents such as acetone for the reason that polar solvents dissolve polar solutes [89]. This procedure was followed for the preparation of all the different g-C 3 N 4 /PMMA/PUR membranes containing different amounts of PMMA.…”

Section: Preparation Of the Membranementioning

confidence: 99%

Design and Performance of Novel Self-Cleaning g-C3N4/PMMA/PUR Membranes

et al. 2020

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In the majority of photocatalytic applications, the photocatalyst is dispersed as a suspension of nanoparticles. The suspension provides a higher surface for the photocatalytic reaction in respect to immobilized photocatalysts. However, this implies that recovery of the particles by filtration or centrifugation is needed to collect and regenerate the photocatalyst. This complicates the regeneration process and, at the same time, leads to material loss and potential toxicity. In this work, a new nanofibrous membrane, g-C 3 N 4 /PMMA/PUR, was prepared by the fixation of exfoliated g-C 3 N 4 to polyurethane nanofibers using thin layers of poly(methyl methacrylate) (PMMA). The optimal amount of PMMA was determined by measuring the adsorption and photocatalytic properties of g-C 3 N 4 /PMMA/PUR membranes (with a different PMMA content) in an aqueous solution of methylene blue. It was found that the prepared membranes were able to effectively adsorb and decompose methylene blue. On top of that, the membranes evinced a self-cleaning behavior, showing no coloration on their surfaces after contact with methylene blue, unlike in the case of unmodified fabric. After further treatment with H 2 O 2 , no decrease in photocatalytic activity was observed, indicating that the prepared membrane can also be easily regenerated. This study promises possibilities for the production of photocatalytic membranes and fabrics for both chemical and biological contaminant control.Polymers 2020, 12, 850 2 of 20 aqueous solutions [11][12][13][14]. Adsorption by activated carbon is the most used method of dye removal due to good removal efficiency of a wide variety of dyes. Performance is dependent on the type of carbon used and the characteristics of the wastewater. The removal rate can be improved using massive doses of activated carbon. However, the re-use of regenerated activated carbon results in a steep reduction in adsorption capacity and the efficiency of dye removal becomes unpredictable and dependent on massive doses of such re-used activated carbon. Activated carbon is also very expensive and its reactivation results in 10%-15% loss of the sorbent [15][16][17].A promising method in order to overcome issues such as limited sorption capacity and regeneration is the use of materials with photocatalytic activity. Carbon nitride (g-C 3 N 4 ) is a metal-free organic semiconductor. This material is an attractive candidate in the field of photocatalysis due to its chemical stability, non-toxicity, straightforward preparation procedure and ability to absorb light efficiently in the visible range due to a narrow band gap (2.7 eV) [18][19][20]. g-C 3 N 4 has been used in photocatalytic applications such as water splitting [21,22], the photocatalytic degradation of air pollutants, such as NOx [23,24], water pollutants such as the dyes, rhodamine B [25][26][27], methyl orange [28], and methylene blue [29][30][31], and other industrial pollutants such as antibiotics [32] or phenols [33][34][35]. In recent years, g-C 3 N 4 was also successfully tes...

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“…As stated previously, the hardness target is around 80 oscillations. The coatings with AHPMA, acrylic acid monomers and DGDA as oligomer (n° 11,14,15,[18][19][20][21] have hardness pendulum results too high, which indicates low flexibility. Indeed, the reference coating is easy to manipulate.…”

Section: Formulation With Two Hydrogen Bond Componentsmentioning

confidence: 99%

“…Moreover, self-healing UV curable polymers are also reported in the literature, mostly on polyurethane. Wang et al developed UV curable polyurethane containing thiol-ene and Diels-Alder reversible bonds [15]. Liu et al synthesized a UV curable and self-healable polyurethane oligomer from urethane prepolymer and hydroxyethylmethacrylate [16].…”

Section: Introductionmentioning

confidence: 99%

Self-Healing UV Curable Acrylate Coatings for Wood Finishing System, Part 1: Impact of the Formulation on Self-Healing Efficiency

et al. 2020

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In the wood flooring sector, good surface mechanical properties, such as abrasion and scratch resistance, are prerequisite. Surface wood protection is provided by finishing systems. Despite coating improvement, scratches formation on wood flooring is unavoidable. A new approach to increase service life is to confer the self-healing property to the finishing system. The most common coatings used for prefinished wood flooring are acrylate UV curable 100% solids coatings. They usually have good mechanical properties and high cross-linking density. The objective of this study was to develop and evaluate an intrinsic self-healing formulation, which is applicable to wood flooring. For this purpose, acrylate formulations were developed with monomers and oligomers carrying hydroxyl groups. To meet the requirements of wood application, hardness, and polymerization conversion of coatings were evaluated. König pendulum damping tests provide information on coating hardness and flexibility. Results around 80 oscillations is acceptable for UV curable wood sealer. The chemical composition was studied by FT-IR spectroscopy while dynamical mechanical analysis (DMA) was performed to determine glass transition temperature and cross-linking density. The self-healing behavior was evaluated by gloss and scratch depth measurements. The formulation’s composition impacted the hydrogen binding quantity, the conversion, the Tg and the cross-linking density. The (hydroxyethyl)methacrylate (HEMA) monomer provided self-healing and acrylated allophanate oligomer allowed self-healing and cross-linking. This study demonstrated that it is possible to combine high cross-linking density and self-healing property, using components with low steric hindrance.

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UV-curable self-healing polyurethane coating based on thiol-ene and Diels-Alder double click reactions

Cited by 46 publications

References 28 publications

Influence of radical photoinitiators on features of polyacrylate syrups and self-adhesives

Influence of radical photoinitiators on features of polyacrylate syrups and self-adhesives

Design and Performance of Novel Self-Cleaning g-C3N4/PMMA/PUR Membranes

Self-Healing UV Curable Acrylate Coatings for Wood Finishing System, Part 1: Impact of the Formulation on Self-Healing Efficiency

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