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Preparation of cationic fluorinated acrylate copolymer latex and its application on cotton fabric / Yicong Chen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 4 (07/2020)
[article]
Titre : Preparation of cationic fluorinated acrylate copolymer latex and its application on cotton fabric Type de document : texte imprimé Auteurs : Yicong Chen, Auteur ; Fujin Fu, Auteur ; Guifang Yang, Auteur ; Yifan Liu, Auteur ; Yuancai Lv, Auteur ; Minghua Liu, Auteur Année de publication : 2020 Article en page(s) : p. 875-885 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymère acrylate fluoré cationique
CotonLe coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles).
Fluoropolymères
Hydrophobie
Latex
Polymérisation en émulsion
Revêtements organiques
Textiles et tissusIndex. décimale : 667.9 Revêtements et enduits Résumé : Coupled with the improvement in people’s living standards, the demand for textiles having a special performance like water repellency is mushrooming. In this study, the cationic fluorinated acrylate copolymer latex particles with a core–shell structure were synthesized via semicontinuous seed emulsion polymerization process, using Span 80, Tween 80, and dodecyltrimethylammonium chloride as composite emulsifier and (2-(acryloyloxy)ethyl)trimethylammonium chloride as a cationic monomer. Cationic fluorinated acrylate copolymers were successfully confirmed through the FTIR, 1H NMR, and XPS analyses. In addition, the homogeneous latex particles (~ 132 nm of average size) with an evident core–shell structure were observed by TEM analysis, and a stable positive charge (48 ± 5 mV) on the surface of latex particles was demonstrated by zeta potential analysis. Meanwhile, the results showed that the dosage of dodecafluoroheptyl methacrylate (DFMA) played a vital role in the hydrophobicity of the latex films and the one with the best water repellency was identified with 10 g of DFMA dosage. Furthermore, the cotton fabric finishing experiments demonstrated that, after finishing by the cationic fluorinated acrylate copolymer emulsion, the treated cotton fabric exhibited excellent hydrophobicity even at low concentration, with > 130° of the water contact angle and > 60 min of the static absorbing time. Note de contenu : - EXPERIMENTAL SECTION : Materials - Preparation of core-phase and shell-phase preemulsion - Synthesis of cationic fluorinated acrylate copolymer emulsions - Fabric treatment - Characterizations
- RESULTS AND DISCUSSION : Synthesis and characterization of CFE emulsions - XPS analysis of the CFA latex films - Hydrophobicity of the CFA latex films - Zeta potential and DLS of CFA emulsions - The molecular weight distribution of the CFA - Morphology of the latex particles and their films - Hydrophobicity of the finished cotton fabric - Surface morphology of the finished cotton fabricDOI : https://doi.org/10.1007/s11998-019-00306-2 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00306-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34377
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 4 (07/2020) . - p. 875-885[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21864 - Périodique Bibliothèque principale Documentaires Disponible Preparation of cross-linked fluorosilicone acrylate emulsions / Shusen Cao in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 211, N° 4670 (08/2021)
[article]
Titre : Preparation of cross-linked fluorosilicone acrylate emulsions Type de document : texte imprimé Auteurs : Shusen Cao, Auteur ; Xiaolong Chen, Auteur ; Wanting Zhao, Auteur ; Lijun Chen, Auteur Année de publication : 2021 Article en page(s) : p. 20-22 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Diméthylacrylate d'éthylène glycol
Fluorosilicones
Polyacrylates
Polymérisation en émulsion
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : A semi-continuous seeded emulsion polymerisation method was used to prepare an aqueous acrylate emulsion with MMA and BA as the main monomers and EGDMA as the cross-linking monomer. Silicon monomer VTES and fluoromonomer DFMA were added to optimise the acrylate emulsion. The experimental results show that after adding the cross-linking agent, the compactness of the latex film is improved, the water absorption rate is greatly reduced, and the thermal decomposition temperature is increased by 12.32°C. It shows that the heat resistance and water resistance of the latex film of the prepared emulsion are improved. After adding silicon monomer and fluorine monomer, the water resistance of the latex film is greatly improved. In particular, the surface of the fluorine-containing latex film exhibits hydrophobicity. Note de contenu : - EXPERIMENT : Materials - Preparation of luorinated acrylate latex
- RESULTS AND DISCUSSION : FTIR of film - Emulsion appearance and stability - Influence of initiator dosage on monomer conversion rate and coagulation rate
- Scheme 1 : Synthesis formula for preparing cross-linked fluorosilicone acrylate emulsion
- Table 1 : The influence of the amound of emulsifier and the ratio of anion to non-ion on the calcium ion and mechanical stability of the latex
- Table 2 : The effect of emlulsifier dosage on the particle size of latex particles
- Table 3 : The influence of different components on the water absorption and surface water contact angle of latex filmEn ligne : https://drive.google.com/file/d/1PqqPKJY6x8mW7XFdgEBhJcgZU8vYnKNq/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36131
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 211, N° 4670 (08/2021) . - p. 20-22[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22872 - Périodique Bibliothèque principale Documentaires Disponible 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
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 1 (01/2024) . - p. 341-354[article]Réservation
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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 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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