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Synthesis and characterisation of silicone polyacrylate latex emulsified by green surfactants / Yilu Gong in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 209, N° 4649 (03/2019)
[article]
Titre : Synthesis and characterisation of silicone polyacrylate latex emulsified by green surfactants Type de document : texte imprimé Auteurs : Yilu Gong, Auteur ; Tantan Shao, Auteur ; Xin Zhang, Auteur ; Dawei Chen, Auteur ; Lijun Chen, Auteur Année de publication : 2019 Article en page(s) : p. 33-36 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Angle de contact
Biosurfactants
Caractérisation
Copolymère silicone acrylate
Copolymères -- Synthèse
Emulsifiants
Humidité -- Absorption:Eau -- Absorption
Latex
Monomères
Revêtements en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : The modified latex was successfully prepared by semi-continuous seeded emulsion polymerisation with a green mixed emulsifier of polyether nonions with double bonds (AE-100) and alkyl alcohol polyether sodium sulphate anionic emulsifier (ES-430S). The mixed monomers of MMA, BA and vinyl triethoxysilane (VETS) were initiated with potassium persulphate (KPS). The structure and properties of the resultant latex were characterised by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) differential scanning calorimetry (DSC) and contact angle (CA). The conditions for preparing the latex were instigated in detail. Results indicate that the optimal conditions of preparing the latex are as follows: the amount of mixed emulsifiers is 6.0% ; the optimum mass ratio of AE-100 to ES-4305 is 1:1.5 ; the amount of initiator is 0.7% ; the mass rate of main monomers of MMA: BA =1:1 and amount of VIES is 6.0%. In addition, the resultant latex shows good thermal stability and hydrophobicity. Note de contenu : - EXPERIMENT : Materials - Preparation of modified latex - Characterisation
- RESULTS AND DISCUSSION : FTIR and DSC of films - Influence of mass ratio of monomer on properties of latex - Effect of amount of emlusifier and mass ratio on properties of latex - Water absorption and contact angle
- Fig. 1 : Synthetic pathway of preparing modified latex
- Fig. 2 : FTIR of latex film
- Fig. 3 : DSC of film
- Fig. 4 : Effect of different mass ratios of emulsifier on conversion percentage (A) and coagulation percentage (B)
- Fig. 5 : Influence of amount of VTES on contact angle (B) and water absorption (C)
- Fig. 6 : Contact angles of film la 77.6°, conventional latex film ; b 89.6°, modified latex film)
- Fig. 7 : TGA of latex film (a : conventional latex film ; b : modified latex film)
- Table 1 : Recipe of preparing modified latex
- Table 2 : The effect of the amount of emulsifiers on average particle size
- Table 3 : Influence of mass radio of monomer on properties of lates
- Table 4 : Influence of amount of emulsifier on properties of latexEn ligne : https://drive.google.com/file/d/1YrbMdfoE1Li2zajO9lRzKpc2h_ehnrTQ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32122
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Code-barres Cote Support Localisation Section Disponibilité 20765 - Périodique Bibliothèque principale Documentaires Disponible 20958 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and characterization of nanoporous sodium-substituted hydrophilic titania ceramics coated on 316L SS for biomedical applications / K. Bavya Devi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 5 (10/2011)
[article]
Titre : Synthesis and characterization of nanoporous sodium-substituted hydrophilic titania ceramics coated on 316L SS for biomedical applications Type de document : texte imprimé Auteurs : K. Bavya Devi, Auteur ; Kulwant Singh, Auteur ; N. Rajendran, Auteur Année de publication : 2011 Article en page(s) : p. 595-604 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier inoxydable
Adhésion
Angle de contact
Biomatériaux
Caractérisation
Composés inorganiques -- Synthèse
Dioxyde de titane
Hydrophilie
HydroxyapatiteL'hydroxyapatite est une espèce minérale de la famille des phosphates, de formule Ca5(PO4)3(OH), usuellement écrite Ca10(PO4)6(OH)2 pour souligner le fait que la maille de la structure cristalline comprend deux molécules. L'hydroxyapatite est le membre hydroxylé du groupe apatite. L'ion OH- peut être remplacé par le fluor, le chlore ou le carbonate.
L'hydroxyapatite cristallise dans le système hexagonal. La poudre d'hydroxyapatite pure est blanche. Celles que l'on trouve dans la nature peuvent cependant être de couleur marron, jaune ou verte.
Matériaux poreux
Revêtement de céramiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Bioactive sodium-substituted titania coating on 316L SS substrate was prepared. XRD patterns exhibited the formation of a mixture of two phases (Na2Ti3O7, Na2Ti6O13) with monoclinic structure. FTIR spectra showed that the set of overlapping peaks in the range of 800–400 cm−1 are related to Ti–O and Ti–O–Ti groups. SEM-EDAX, AFM, and TEM showed the surface morphology of the coated surface to be nanoporous and uniform. The influence of the bioactivity of the coating in a simulated body fluid (SBF) medium was examined. Excellent adhesion of the ceramic composites to the substrate was achieved. The hydrophilic nature of the sodium titanate coating induced the formation of hydroxyapatite layer on the metal surface. The corrosion protection performance of the coatings has been evaluated using potentiodynamic polarization and electrochemical impedance spectroscopy measurements, which proved increased corrosion resistance of nanosodium titanate-coated 316L SS. These results imply that the sodium titanate-coated 316L SS acts as a barrier layer to the metallic substrate. Note de contenu : EXPERIMENTAL PROCEDURE : Substrate pretreatments - Synthesis of the coatings.
CHARACTERIZATION TECHNIQUES : Surface characterization - Biochemical measurement.
RESULTS AND DISCUSSION : Surface characterizations - Mechanical properties - In vitro characterization - Bioelectrochemical corrosion studies.DOI : 10.1007/s11998-011-9344-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9344-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12235
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 5 (10/2011) . - p. 595-604[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13360 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and characterization of novel renewable castor oil-based UV-curable polyfunctional polyurethane acrylate / Yun Hu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 1 (01/2018)
[article]
Titre : Synthesis and characterization of novel renewable castor oil-based UV-curable polyfunctional polyurethane acrylate Type de document : texte imprimé Auteurs : Yun Hu, Auteur ; Chengguo Liu, Auteur ; Qianqian Shang ; Yonghong Zhou Année de publication : 2018 Article en page(s) : p. 77–85 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse mécanique dynamique
Angle de contact
Chromatographie sur gel
Copolymère uréthane acrylate
Copolymères -- Propriétés thermiques
Copolymères -- Synthèse
Fourier, Spectroscopie infrarouge à transformée de
Gonflement (physique)
Huile de ricin et constituants
Humidité -- Absorption:Eau -- Absorption
Hydrophobie
Rayonnement ultraviolet
Résonance magnétique nucléaire
Réticulation (polymérisation)Index. décimale : 667.9 Revêtements et enduits Résumé : In recent years, a lot of interest has been given to renewable resources for their environmental friendliness and potential biodegradability in the synthesis of urethane-derived polymers. In this work, UV-curable castor oil-based polyfunctional polyurethane acrylate (COPUA) was prepared by the reaction of isophorone diisocyanate (IPDI) with castor oil and pentaerythritol triacrylate (PETA). The structures and molecular weights of the targeted IPDI–PETA and COPUA were characterized by FTIR, 1H NMR, and GPC, respectively. In addition, the effect of reactive diluent content on damping properties, thermal stabilities, and mechanical properties of COPUA was characterized by dynamic mechanical analysis (DMA), thermogravimetric analysis (TGA), and universal test machine. DMA revealed the copolymers had a glass transition temperature (T g) from 31.81 to 48.09°C. TGA showed that thermal initial decomposition temperatures were above 344.5°C, indicating the copolymers had certain thermal stability. Finally, some physical properties of curing films were studied by the contact angle and water absorption, and the results showed that the coatings exhibited good hydrophobicity. The COPUA obtained from castor oil can be used as eco-friendly materials and other applications alternative to the use of other petrochemicals in coatings. Note de contenu : - EXPERIMENTAL : Materials - Preparation - Determination of NCO content 24 - Characterization
- RESULTS AND DISCUSSION : FTIR analysis - 1H-NMR analysis - GPC analysis - DMA characterization - Thermal properties - Contact angle characterization - Mechanical properties of the COPUA - Swelling measurement of the COPUA - Photocuring kinetics by real-time infrared spectroscopy (RT-IR)DOI : 10.1007/s11998-017-9948-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9948-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30069
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Code-barres Cote Support Localisation Section Disponibilité 19610 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and development of 1K thermosetting acrylic easy to clean clear coat / Sani Mukherjee in PAINTINDIA, Vol. LXXXIII, N° 12 (12/2023)
[article]
Titre : Synthesis and development of 1K thermosetting acrylic easy to clean clear coat Type de document : texte imprimé Auteurs : Sani Mukherjee, Auteur Année de publication : 2023 Article en page(s) : p. 72-86 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Angle de contact
Chimie analytique
Copolymère silicone acrylate
Essais de brouillard salin
Polyacryliques
Polymères -- Synthèse
Revêtements anti-graffitis
Surfaces -- Nettoyage
Thermodurcissables
VernisIndex. décimale : 667.9 Revêtements et enduits Résumé : In this study, we have targeted to improve the cleanability of coating as well as the systemization of coating from 2K to 1K. Thermosetting acrylic resin was prepared by using carboxyl acid and hydroxyl group containing monomers, modified with siloxane acrylate which is later cross-linked with highly methylated monomeric melamine cross-linker by catalysing the same with acid catalyst. Grafting of polymers was con firmed by FTIR analysis. The differential scanning calorimetry revealed the glass transition temperature. The synthesized copolymer was applied on metal substrate and the coating characterization viz. surface energy and contact angle is tested by Goniometer. The easy to clean effect was studied by permanent marker. Static water contact angle and contact angle hysteresis measurements proved the formation of hydrophobic surfaces. Samples displayed static water contact angle 99.8°. Increasing the melamine formaldehyde and acid catalyst percentage by keeping the hydroxyl value and siloxane content same showed better easy to clean property by increasing only siloxane content. Note de contenu : - EXPERIMENTAL : Materials - Process for the synthesis of acrylic resin - Synthesis of modified acrylic resin - Preparation of coating - Instrumetnal analysis - FTIR and GPC analysis - Contact angle (CA) - Surface-free energy (SFE) - Differentials scanning calorimetry (DSC) - Weatherability - Salt spray test
- RESULTS AND DISCUSSION : Incubator stabilty - Contact angle - Salt spray testing - Easy to clean propertiesEn ligne : https://drive.google.com/file/d/1vK7T4i_1T0fvzGgInVeg1u8clLxVHviO/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40742
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Code-barres Cote Support Localisation Section Disponibilité 24517 - Périodique Bibliothèque principale Documentaires Disponible Synthesis of acrylate-based UV/thermal dual-cure coatings for antifogging / Bolong Yao in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 1 (01/2018)
[article]
Titre : Synthesis of acrylate-based UV/thermal dual-cure coatings for antifogging Type de document : texte imprimé Auteurs : Bolong Yao, Auteur ; Haiping Zhao, Auteur ; Likui Wang, Auteur ; Yun Liu, Auteur ; Chunsen Zheng, Auteur ; Hongping Li, Auteur ; Changqing Sun, Auteur Année de publication : 2018 Article en page(s) : p. 149-158 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse thermique
Angle de contact
Caractérisation
Fourier, Spectroscopie infrarouge à transformée de
Microscopie à force atomique
Orthosilicate de tétraéthyleL'orthosilicate de tétraéthyle (TEOS) est un composé chimique de formule Si(OCH2CH3)4 ou plus simplement Si(OEt)4; l'abréviation TEOS (pour tetraethylorthosilicate) est généralement utilisée dans l'industrie du sol-gel, où il est intensivement étudié. La majorité des études en sol-gel pour des sols de silices ont utilisé ce produit comme précurseur.
Le TEOS est généralement produit par alcoolyse du tétrachlorure de silicium SiCl4 dans de l'éthanol CH3CH2OH :
SiCl4 + 4 CH3CH2OH → Si(OCH2CH3)4 + 4 HCl.
Il est utilisé pour la réticulation de silicones et possède certaines applications comme précurseur du dioxyde de silicium SiO2 dans l'industrie des semi-conducteurs6 dans le cadre d'une réaction sol-gel. La propriété remarquable du TEOS est en effet de former du SiO2 par simple hydrolyse en libérant de l'éthanol CH3CH2OH :
Si(OCH2CH3)4 + 2 H2O → SiO2 + 4 CH3CH2OH.
Photoamorceurs (chimie)
Polyacrylates
Polymères -- Synthèse
Résistance à l'humidité:Résistance à l'eau
Résonance magnétique nucléaire
Réticulants
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques
Revêtements anti-buée:Peinture anti-buéeIndex. décimale : 667.9 Revêtements et enduits Résumé : A dual-cure hydrophilic acrylate polymer was synthesized via radical polymerization with acrylic acid (AA), isophorone diisocyanate (IPDI), 2-acrylamide-2-methylpropane sulfonic acid (AMPS), hydroxyethyl acrylate (HEA), and 3-(trimethoxysilyl)propyl-2-methyl-2-methacrylate (MPS) as monomers, then used as prepolymer for antifog coating with tetraethylorthosilicate (TEOS) as a novel crosslinker. The prepolymer was mixed with crosslinking agent and photoinitiator to form coating formulas. The coating was characterized by nuclear magnetic resonance (NMR), Fourier-transform infrared (FTIR) spectroscopy, and contact angle measurements. The results indicated that the dosage of AMPS and TEOS had great influence on the antifog performance. With an increasing TEOS amount, the hardness, adhesion, water resistance, impact resistance, and thermal stability of the films were improved, at the expense of transparency ; with increasing dosage of AMPS, the hydrophilicity of the film increased at the expense of water resistance. Optimum coating properties could be obtained when the amount of AMPS was 7% and that of TEOS was 5.5%. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) results showed that some SiO2 microspheres were formed and microphase separation occurred between the macromolecular segments, yielding the excellent coating properties. Note de contenu : - EXPERIMENTAL : Materials - Preparation of antifog coatings - Characterization
- RESULTS AND DISCUSSION : FTIR spectroscopy - 1H and 13C NMR analysis - Water contact angle and water absorption of antifog coatings - Transparency of antifog coatings - Spreading time and contact angle - AFM analysis of antifog coatings - DSC analysis - Mechanical performance and water resistance of coatings - Antifog property of coatingsDOI : 10.1007/s11998-017-9966-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9966-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30107
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