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Preparation of crosslinkable cationic polyacrylate latex and its film properties / Xueke Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 1 (01/2024)
[article]
Titre : Preparation of crosslinkable cationic polyacrylate latex and its film properties Type de document : texte imprimé Auteurs : Xueke Zhang, Auteur ; Kaimin Chen, Auteur ; Ziwei Li, Auteur ; Qianqian Zhang, Auteur ; Chenming Xu, Auteur ; Yue Chang, Auteur ; Shaoguo Wen, Auteur Année de publication : 2024 Article en page(s) : p. 341-354 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bases (chimie)
Humidité -- Absorption:Eau -- Absorption
Latex
Polyacrylates
Polymères cationiques
Polymérisation en émulsion
Résistance chimique
Revêtements -- Propriétés mécaniques
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Cationic polyacrylate latex has attracted extensive attention due to its special properties and potential applications in wood primers, metal coatings, and fabric treatments, etc. However, cationic polyacrylate latex has poor durability and stability, which limits its use in practical applications. In this study, a functional cationic monomer (3-chloro-2-hydroxypropyl) dimethyl [2-[(2-methyl-1-oxoallyl)oxy]ethyl] ammonium chloride (DEAC) was combined with two conventional monomers of methyl methacrylate (MMA) and butyl acrylate (BA) to prepare cationic polyacrylate latex by a semi-continuous emulsion polymerization. The obtained latexes showed typical cationic character with zeta potential in the range of + 40 to + 65 mV. The effect of DEAC on the stability of latex was studied and good alkali resistance could be gained at high DEAC content. Water resistance and mechanical properties of the film before and after crosslinking are studied in detail. The results showed that the water absorption reduced from 60.04% to a minimum of 9.18%, and the tensile strength increased from 3.9 to 8.4 MPa, which was comparable to solvent-based polyacrylate films. This work provides a new strategy for the preparation of waterborne cationic polyacrylate latex with improved water resistance and good mechanical properties, etc., which can be applied in papermaking, textiles, wood primers, and other potential fields. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of DEAC - Synthesis of cationic polyacrylate latex P(MMA-co-BA-co-DEAC) - Preparation of cationic polyacrylate film - Characterization
- RESULTS AND DISCUSSION : Effect of DEAC on polyacrylate latex - Effect of DEAC on stability properties - Film properties
- Table 1 : Properties of cationic polyacrylate latex with different amounts of DEAC
- Table 2 : Properties of cationic polyacrylate latex with different amount of DEACDOI : https://doi.org/10.1007/s11998-023-00826-y En ligne : https://drive.google.com/file/d/143nNUjIN202dKWmu9uZH5XyWG-Zz61cy/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40457
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Code-barres Cote Support Localisation Section Disponibilité 24443 - Périodique Bibliothèque principale Documentaires Disponible 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 high-solid, low-viscosity waterborne polyurethane: based on multiparticle size composite emulsification / Kunpeng Lou in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
[article]
Titre : Preparation of high-solid, low-viscosity waterborne polyurethane: based on multiparticle size composite emulsification Type de document : texte imprimé Auteurs : Kunpeng Lou, Auteur ; Siliang Li, Auteur ; Yang Cao, Auteur ; Menghang Li, Auteur ; Xiaoxuan Zou, Auteur ; Bo Jing, Auteur Année de publication : 2024 Article en page(s) : p. 907-923 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Emulsification
Granulométrie
Haut extrait sec
Polymères en émulsion
Polyuréthanes
Revêtements en phase aqueuse
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : In this paper, waterborne polyurethane (WPU-SL) with high solid content and low viscosity was successfully prepared by compounding large particle size emulsion (WPU-L) with a variety of small particle size emulsions (WPU-S) by investigating the effects of small particle size type, particle size ratio, and volume ratio on the emulsion properties. A series of characterization techniques of the waterborne polyurethane was carried out by FTIR, DSC, contact angle, viscometer, particle size meter, and universal testing machine. The results show that the WPU-L/WPU-S = 5/1 emulsion has a high solid content, good emulsion stability, and excellent coating film properties. When WPU-S1 and WPU-S3, two small particle size emulsions with a particle size ratio of 2.45 and 3.79, were emulsified with WPU-L, the solid content was up to 61.23%, the viscosity was only 342 mPa s, the tensile strength reached 20.97 MPa, and the adhesion grade was 5B, which was the most excellent overall performance, showing satisfactory results. Note de contenu : - EXPERIMENTAL : Materials - Preparation of small-particle waterborne polyurethane (WPU-S) - Preparation of large-particle waterborne polyurethane (WPU-L) - Preparation of high-solid content waterborne polyurethane (WPU-SL) - Preparation of WPU films
- CHARACTERIZATION
- RESULTS AND DISCUSSION : FTIR spectra of WPU - Emulsion properties of small particle size emulsions (WPU-S) and large particle size emulsions (WPU-L) - The particle size of WPU-SL emulsions and their solid content and viscosity - Thermal properties of WPU-SL emulsions - Water absorption of WPU-SL emulsions and their contact angle - Tensile properties of WPU-SL emulsions - Adhesion of WPU-SL emulsionsDOI : https://doi.org/10.1007/s11998-023-00859-3 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00859-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41066
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 3 (05/2024) . - p. 907-923[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24688 - Périodique Bibliothèque principale Documentaires Disponible Preparation of modified montmorillonite/graphene oxide composites to enhance the anticorrosive performance of epoxy coatings / Quanxian Hua in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 3 (05/2023)
[article]
Titre : Preparation of modified montmorillonite/graphene oxide composites to enhance the anticorrosive performance of epoxy coatings Type de document : texte imprimé Auteurs : Quanxian Hua, Auteur ; Ben Jing, Auteur ; Mengyuan He, Auteur ; Panfei Sun, Auteur ; Qiang Zhao, Auteur ; Shilong Su, Auteur ; Guanjie Hu, Auteur ; Songjie Li, Auteur Année de publication : 2023 Article en page(s) : p. 1110-1119 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Caractérisation
Composés organiques -- Synthèse
Electrochimie
Epoxydes
Hydrophobie
Montmorillonite
Oxyde de graphène
Réaction de couplage
Revêtements organiques
SilanesIndex. décimale : 667.9 Revêtements et enduits Résumé : Modified montmorillonite/graphene oxide composites (AM@GO) were prepared by a hydrothermal method with silane coupling agent-modified montmorillonite (APTES@MMT) and combined with GO. The structures of the composites were characterized by FTIR, XRD, Raman spectroscopy, BET analysis, and SEM. The results showed that the composites had increased interlayer spacing and formed a loosely laminated stacked structure. The specific surface area (31.6863 m2/g) and pore volume (0.0104 cm3/g) of the composites increased. The hydrophobic and anticorrosive properties of the composite coatings were investigated and compared to the epoxy coating. The composite coatings (AM@GO/EP) had larger contact angles and smoother surfaces than the epoxy coating (EP). After 30 days of immersion, the value of |Z|0.01 Hz was approximately 1011 Ω cm2, which had changed slightly since initial immersion. Mechanistic analysis shows that the improved corrosion resistance of the composite coatings was due to the high specific surface area of the 2D material, the oxygen-containing groups of GO, the amino groups of APTES@MMT and the synergy between the MMT and the GO nanosheets. Note de contenu : - Materials
- Synthesis of APTES@MMT(AM)
- Synthesis of GO
- Synthesis of AM@GO
- Epoxy composite coating preparation
- Electrochemical measurements
- Structural characterization
- Table 1 : Impedance values of different types of coatings under different immersion daysDOI : https://doi.org/10.1007/s11998-022-00731-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00731-w.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39451
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Code-barres Cote Support Localisation Section Disponibilité 24069 - Périodique Bibliothèque principale Documentaires Disponible Preparation of PEO/polymer coatings on aluminum alloy with antifouling properties / Ulyana Kharchenko in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 2 (03/2023)
[article]
Titre : Preparation of PEO/polymer coatings on aluminum alloy with antifouling properties Type de document : texte imprimé Auteurs : Ulyana Kharchenko, Auteur ; I. Beleneva, Auteur ; V. Egorkin, Auteur ; I. Vyalyi, Auteur ; N. Izotov, Auteur ; A. T. Tsvetnikov, Auteur ; A. Karpenko, Auteur ; Chi V. Nguyen, Auteur Année de publication : 2023 Article en page(s) : p. 763-779 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bactéries
Caractérisation
Electrochimie
Métaux -- Revêtements protecteurs
Microcapsules
Polyacryliques
PolyènesPolyène est le nom générique des composés organiques polyinsaturés qui possèdent au moins 2 doubles liaisons carbone-carbone et au moins 5 carbones.
Polyéthylène glycol
Polytétrafluoréthylène
Produits naturels
Revêtement autopolissant
Revêtements -- Propriétés mécaniques
Revêtements antisalissures
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : A study on the development of an effective composition of polymeric antifouling coating based on acrylic copolymer with microencapsulated extract of natural origin and superdispersed polytetrafluoroethylene was carried out. A Raman spectroscopy study of the bacterial extract composition showed that the main component was a polyene pigment with 5 conjugated bonds. Encapsulation of ethyl acetate extract of Pseudoalteromonas piscicida 2202 was carried out, two types of microcapsules containing the microbial extract were obtained, and their morphology and efficiency of antifouling action in the coating were studied. Comprehensive studies of antifouling, anticorrosion, and mechanical properties of the coatings allowed identification of the most effective composition providing long-term protection in combination with satisfactory mechanical properties. It is shown that the use of silica nanocapsules with microbial extract in the coating is more effective for enhanced antifouling and mechanical performance. Note de contenu : MATERIALS AND METHODS : Materials - PEO process - Preparation of bacterial extract - Raman spectroscopy of P. piscicida 2202 extract - Encapsulation of P. piscicida 2202 extract in silica nanocapsules and poly(urea–formaldehyde) microcapsules - Preparation of organic topcoat - Field tests - Electrochemical study - Mechanical properties measurements - Surface characterization
- RESULTS AND DISCUSSION : Characterization of bacterial extract by Raman spectroscopy - Characterization of SiNCs and PUF-microcapsules - Field immersion - Electrochemical measurements - Mechanical performance of paints - Comparative evaluation of coatings
- Table 1 : Table 1 Composition of prepared coatingsDOI : https://doi.org/10.1007/s11998-022-00706-x En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00706-x.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39317
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