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Preparation of high-performance epoxy soybean oil-based UV-curable oligomers and coatings / Yumei Zhou in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 6 (11/2023)
[article]
Titre : Preparation of high-performance epoxy soybean oil-based UV-curable oligomers and coatings Type de document : texte imprimé Auteurs : Yumei Zhou, Auteur ; Linxi Feng, Auteur ; Jinqing Qu, Auteur Année de publication : 2023 Article en page(s) : p. 1923-1933 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse structurale (ingénierie)
Copolymère époxy acrylique
Copolymères -- Synthèse
Huile de soja
Oligomères
Revêtements -- Propriétés mécaniques
Revêtements -- Propriétés thermiques
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements organiques
Traction (mécanique)Index. décimale : 667.9 Revêtements et enduits Résumé : Ultraviolet (UV)-curable coatings made from acrylated epoxy soybean oil (AESO) combine the advantages of renewable biobased resources and energy-efficient UV-curable materials, so they serve as the primary research objects for developing eco-friendly coatings. However, due to the lack of rigid structure, the hardness and thermal stability of AESO are much lower than those of petroleum-based epoxy acrylate (EA). Therefore, high-performance soybean oil-based UV-curable oligomers were prepared by using dimethylolpropionic acid (DMPA) and methacrylic anhydride (MAAH) to modify ESO and then blended with high-functional active diluent trimethylolpropane triacrylate (TMPTA). Furthermore, FTIR, 1H NMR, and GPC were used to analyze the molecular structure and molecular weight of the oligomers. The oligomers (DMA/MAAESO and DMA/MAAESO-TM) had high esterification rate, curing degree, and good storage stability. The cured coatings from DMA/MAAESO and DMA/MAAESO-TM oligomers had significantly improved thermal stability, tensile, and coating properties. In all samples, DMA/MAAESO-TM cured coating had excellent coating performances. The glass transition temperature (Tg) of DMA/MAAESO-TM was 78.1°C, and its crosslink density (νe) was 6.87 × 10−3 mol/cm3. The hardness, curing time, gloss, flexibility, and impact resistance were H, 20 s, 108.5, 1 mm, and 50 cm, respectively. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of acrylate epoxy soybean oil (AESO) - Synthesis of DMA/MAA - Synthesis of DMA/MAAESO - Preparation of AESO and DMA/MAAESO coatings - Characterization
- RESULTS AND DISCUSSION : Synthesis of DMA/MAA and DMA/MAAESO - Structural analysis of AESO and DMA/MAAESO -
GPC of AESO and DMA/MAAESO - Physical properties of UV-curable oligomers - Dynamic mechanical analysis of UV-curable coatings - Thermogravimetric analysis of UV-curable coatings - Tensile properties of UV-curable coatings - Coating film properties
- Table 1 : Physical properties of oligomers
- Table 2 : Dynamic mechanical properties of UV-curable coatings
- Table 3 : Thermal properties of UV-curable coatings
- Table 4 : Tensile properties of UV-curable coatings
- Table 5 : Coating film propertiesTable 6 Comparison of the DMA/MAAESO-TM with other samples in the literatureDOI : https://doi.org/10.1007/s11998-023-00787-2 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00787-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40171
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 6 (11/2023) . - p. 1923-1933[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24337 - Périodique Bibliothèque principale Documentaires Disponible Preparation of low viscosity and high flexibility epoxy acrylate and its application in UV-curable coatings / Yumei Zhou in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : Preparation of low viscosity and high flexibility epoxy acrylate and its application in UV-curable coatings Type de document : texte imprimé Auteurs : Yumei Zhou, Auteur ; Jinqing Qu, Auteur Année de publication : 2024 Article en page(s) : p. 601-610 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymère époxy acrylique
Copolymères -- Synthèse
Oligomères
Revêtements -- Propriétés mécaniques
Revêtements -- Séchage sous rayonnement ultraviolet
Souplesse (mécanique)
Thermodurcissables
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : Epoxy acrylate (EA) is currently the most widely used UV-curable oligomer due to its short curing time, high coating hardness, excellent mechanical property, and thermal stability. To address the problems of high brittleness, poor flexibility, and high viscosity of EA, the UV-curable epoxy acrylate oligomer with low viscosity and high flexibility was prepared and applied to UV-curable coatings. The carboxyl terminated intermediate obtained by the reaction of anhydride and diol was used to modify EA to improve the flexibility of cured film, and the flexibility was adjusted through the length of the carbon chain of diols. The resin viscosity was reduced by partially replacing E51 with binary glycidyl ether. Compared with unmodified EA, the viscosity of the resin prepared in this study decreases from 29800 to 13920 mPa s (25°C), and the flexibility of the cured film increases from 12 to 1 mm. Compared with commercially available modified EA, the raw materials used in this study are low cost and easy to obtain with a reaction temperature below 130°C, using a simple synthesis process, and no organic solvents. Note de contenu : - EXPERIMENT : Raw materials - Synthesis of EA - Synthesis of MHEA - Preparation of UV-cured film - Characterization - Acid value (A v) - Viscosity (V s) - Fourier transform infrared spectroscopy (FTIR) - 1H nuclear magnetic resonance (1H NMR) - Gel permeation chromatography (GPC) - Gel rate of curing film (C gel) - Thermogravimetric analysis (TGA) - Tensile properties testing - Curing time testing - Coating film properties testing
- RESULTS AND DISCUSSION : Determination of reaction conditions - Determination of the type of diols - Determination of the type of acid anhydrides - Determination of BDDGE addition amount - Structural analysis of MHEA - Curing process of UV-curable coatings - Thermogravimetric analysis of the cured films - Tensile properties of the cured films - UV-curable coating properties
- Table 1 : Effect of kinds of diols on properties of the resin and cured film
- Table 2 : Effect of kinds of anhydrides on properties of the resin and cured film
- Table 3 : Effect of BDDGE addition on the properties of the resin and cured film
- Table 4 : GPC results of E51 and MHEA
- Table 5 : TG results of cured film prepared by EA and MHEA
- Table 6 : Tensile properties of the EA and MHEA cured films
- Table 7 : Comparison of cured film propertiesDOI : https://doi.org/10.1007/s11998-023-00842-y En ligne : https://drive.google.com/file/d/1PLtHKXgXPTsptg2OK9_saRrfjeXqQFns/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40780
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 601-610[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24736 - Périodique Bibliothèque principale Documentaires Disponible Sorbitol-based aqueous cyclic carbonate dispersion for waterborne nonisocyanate polyurethane coatings via an environment-friendly route / Zhijun Wu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 3 (05/2019)
[article]
Titre : Sorbitol-based aqueous cyclic carbonate dispersion for waterborne nonisocyanate polyurethane coatings via an environment-friendly route Type de document : texte imprimé Auteurs : Zhijun Wu, Auteur ; Jingtao Dai, Auteur ; Liuyan Tang, Auteur ; Jinqing Qu, Auteur Année de publication : 2019 Article en page(s) : p. 721-732 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anhydrides
Caractérisation
Carbonate cyclique
Revêtements en phase aqueuse
Revêtements sans isocyanates
Rhéologie
SorbitolIndex. décimale : 667.9 Revêtements et enduits Résumé : The cyclic carbonate derivatives carrying carboxyl groups were prepared via the reaction of the sorbitol-based cyclic carbonate (SC) with anhydrides including succinic anhydride, o-phthalic anhydride, and maleic anhydride. (Succinic anhydride-, o-phthalic anhydride-, and maleic anhydride-based cyclic carbonates were named SSC, PSC, and MSC, respectively.) The structures of SC, SSC, PSC, and MSC were characterized by 1H NMR and FTIR. Then, the novel sorbitol-based aqueous cyclic carbonate dispersion was prepared. It was found that SSC dispersion possessed excellent stability and its particle sizes ranged from 63 to 174 nm with −73.3 to −48.2 mV for the zeta potentials. A series of novel waterborne nonisocyanate polyurethanes coatings (WNIPU) were successfully prepared by sorbitol-based cyclic carbonate reacted with diamines. The effects of diamine categories and the molar ratios of isophorone diamine (IPDA) and hexamethylene diamine (HMDA) on the properties of WNIPU were studied. The results showed that the pencil and pendulum hardness of WNIPU coatings were all relatively decreased with the increase in HMDA contents. The WNIPU coatings exhibited excellent flexibility, adhesion, gloss, and impact resistance with the molar ratios of IPDA/HMDA ranging from 1:1 to 1:3. Moreover, cured films display good thermal stabilities with only 5% weight loss (T5%) in temperatures ranging from 246 to 272°C. Note de contenu : - EXPERIMENTAL : Materials - Preparation of sorbitol-based cyclic carbonate (SC) - Preparation of succinic anhydride (SA)-, maleic anhydride (MAH)-, o-phthalic anhydride (PA)- based aqueous cyclic carbonate dispersions - Preparation of WNIPU coatings - Characterization of SC and WNIPU coatings
- RESULTS AND DISCUSSION : Synthesis and characterization of SC - Preparation and characterization of succinic anhydride (SA)-, maleic anhydride (MAH)-, o-phthalic anhydride (PA)-based aqueous cyclic carbonate dispersions - Synthesis and characterization of WNIPU coatings - Properties of WNIPU coatingsDOI : 10.1007/s11998-018-00150-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0150-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32585
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Code-barres Cote Support Localisation Section Disponibilité 20953 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and properties of fluorinated non-isocyanate polyurethanes coatings with good hydrophobic and oleophobic properties / Zhijun Wu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 5 (09/2019)
[article]
Titre : Synthesis and properties of fluorinated non-isocyanate polyurethanes coatings with good hydrophobic and oleophobic properties Type de document : texte imprimé Auteurs : Zhijun Wu, Auteur ; Liuyan Tang, Auteur ; Jingtao Dai, Auteur ; Jinqing Qu, Auteur Année de publication : 2019 Article en page(s) : p. 1233-1241 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Caractérisation
Carbonate cyclique
Fluoropolymères
Hydrophobie
Oléophobie
Polymères -- Synthèse
Revêtements organiques
Revêtements sans isocyanatesIndex. décimale : 667.9 Revêtements et enduits Résumé : To improve the chemical resistance of non-isocyanate polyurethane (NIPU), two kinds of diglycidyl ether, bisphenol AF (E-AF) and perfluorooctyl glycidyl ether (PFGE), were selected to synthesize two different cyclic carbonates, bisphenol AF (EC-AF) and perfluorooctyl cyclic carbonate (PFGC), respectively. These cyclic carbonates were successfully used to prepare fluorine-containing non-isocyanate polyurethane coatings. The effects of PFGC amounts on the properties of NIPU were studied, and it was found that the contact angles of water, diiodomethane, and hexadecane were increased with the addition of PFGC and up to 106.7°, 80.2°, and 72.7°, respectively, whereas the pendulum hardness of NIPU coatings relatively decreased with the increase in PFGC contents. The NIPU coatings exhibited excellent flexibility, adhesion, and impact resistance. They also displayed good thermal stability with 5% weight loss temperature (T5%) ranging from 249 to 271°C. Moreover, these coatings possessed very low water uptake, excellent hydrophobic/oleophobic properties, and corrosion resistance properties. Note de contenu : - EXPERIMENTAL : Materials - Preparation of EC-AF and PFGC - Preparation of NIPU coatings - Characterization
- RESULTS AND DISCUSSION : Synthesis and characterization of EC-AF and PFGC - Synthesis and characterization of NIPU coatingsDOI : 10.1007/s11998-019-00195-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-019-00195-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33007
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Code-barres Cote Support Localisation Section Disponibilité 21154 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and properties of multiarm star hydroxyl-terminated polyesters for two-component polyurethane coatings / Shan Huang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 3 (05/2017)
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Titre : Synthesis and properties of multiarm star hydroxyl-terminated polyesters for two-component polyurethane coatings Type de document : texte imprimé Auteurs : Shan Huang, Auteur ; Juan Xiao, Auteur ; Yan'an Zhu, Auteur ; Jinqing Qu, Auteur Année de publication : 2017 Article en page(s) : p. 505-516 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Essais (technologie)
Groupe hydroxyle
Polyesters
Polymères -- Synthèse
Polymères ramifiés
Polyuréthanes
Rhéologie
Stabilité thermique
Vernis -- Propriétés mécaniques
Vernis bi-composantIndex. décimale : 667.9 Revêtements et enduits Résumé : A series of multiarm star hydroxyl-terminated polyesters (MHPs) were synthesized through a “one-pot” method with di-trimethylolpropane as the core molecule, 2,2-dimethylolpropionic acid as the AB2-type monomer, ε-caprolactone, and monocarboxylic acids as modifiers. The influence of different monocarboxylic acids on the viscosities of polyesters and their 2K-PU films hardness was studied and it was found that MHPs prepared from lauric acid displayed the higher films hardness and lower viscosities. IR spectra of MHPs disclosed the ring-opening reaction between ε-caprolactone and hydroxyl groups occurred. 1H NMR spectra demonstrated that the molecular structures of MHPs were irregular due to the multiplicity of reaction processes. The measured number-average molecular weights (Mn) of MHPs were around 715–1854 g/mol with the PDI of 1.45–2.05. MHPs exhibited lower viscosities in the range of 3304–9060 mPa s at 100% solid contents and possessed lower intrinsic viscosities compared with linear polymers of similar molecular weight. The cured films of MHPs exhibited excellent impact resistance, adhesion, flexibility, and high hardness and displayed good thermal stability with 5% weight loss at 280°C. The solution viscosities of MHPs were less than 450 mPa s at 80% solid contents, and the VOC contents of 2K-PU coatings obtained from MHPs were low to 300 g/L. Note de contenu : - EXPERIMENTAL : Materials and reagents - Instruments and measurements - Synthesis of multiarm star hydroxyl-terminated polyesters - Preparation of varnishes and test of film properties
- RESULTS AND DISCUSSION : Influence of monocarboxylic acids - Structural characterization of MHPs - Dilution curves and intrinsic viscosities of MHPs - Thermal stability of cured films - Film properties of MHPsDOI : 10.1007/s11998-016-9883-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9883-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28561
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Code-barres Cote Support Localisation Section Disponibilité 18899 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and properties of water-dispersible polyisocyanates carrying sulfonate / Zhongkang Peng in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 2 (03/2020)
PermalinkSynthesis of UV-curable polyesters with lateral double bonds by ring-opening polymerization and their properties / Yumei Zhou in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
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