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Antiwetting and low-surface-energy behavior of cardanol-based polybenzoxazine-coated cotton fabrics for oil–water separation / P. Prabunathan in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 6 (11/2020)
[article]
Titre : Antiwetting and low-surface-energy behavior of cardanol-based polybenzoxazine-coated cotton fabrics for oil–water separation Type de document : texte imprimé Auteurs : P. Prabunathan, Auteur ; P. Elumalai, Auteur ; G. Dinesh Kumar, Auteur ; M. Manoj, Auteur ; A. Hariharan, Auteur ; G. Rathika, Auteur ; M. Alagar, Auteur Année de publication : 2020 Article en page(s) : p. 1455-1469 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse spectrale
Angle de contact
Caractérisation
Cardanol
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).
Eau
Enduction textile
Morphologie (matériaux)
Polybenzoxazine
Séparation (technologie)
Séparation huile/eau
Spectroscopie de photoélectronsIndex. décimale : 667.9 Revêtements et enduits Résumé : In the present work, the surface behavior of cotton fabrics coated with a series of bio-based polybenzoxazines is explored. Herein, we report the design and synthesis of bio-based benzoxazine monomers (C-x) using cardanol (C) and seven different amines (x = ba, ha, dda, oda, ddm, jef, and fa). The molecular structures of the benzoxazine monomers have been confirmed using FTIR and NMR analyses. The microstructure of the polybenzoxazine-coated cotton fabrics observed from FE-SEM reveals that formation of rough nanostructure is influenced by molecular structure of monomers. Further, surface analysis shows that poly(C-dda)-coated cotton fabric offers superior water contact angle (WCA = 155° ± 3) with low sliding angle (6°). Also, poly(C-dda)-coated cotton fabric delivers the lowest surface energy (14.1 mN/m) and high resistance against acidic and alkaline media. Subsequently, oil–water separation investigation shows that the poly(C-dda)-coated cotton fabric yields 99% of separation efficiency with flux value of 7200 L/m2h. Thus, the cardanol-based polybenzoxazine-coated cotton fabrics prepared in the present work can find application in the field of oil–water separation due to their superior water-repellent nature. Note de contenu : - EXPERIMENTAL SECTION : Materials - Synthesis of cardanol-based benzoxazine monomers (C-x) - Preparation of benzoxazine-coated cotton fabrics - Characterization - Oil–water separation test
- RESULTS AND DISCUSSION : Spectral analysis - Curing behavior of benzoxazine monomers - Spectral analysis of the coated fabrics - Surface properties - Morphology of the polybenzoxazine-coated cotton fabrics - XPS analysis - Oil–water separationDOI : https://doi.org/10.1007/s11998-020-00365-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00365-w.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34952
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Code-barres Cote Support Localisation Section Disponibilité 22458 - Périodique Bibliothèque principale Documentaires Disponible Card phenol based benzoxazine resin and its blends with epoxy and saturated polyester for coating application / P. Katkar in SURFACE COATINGS INTERNATIONAL, Vol. 103.6 (11-12/2020)
[article]
Titre : Card phenol based benzoxazine resin and its blends with epoxy and saturated polyester for coating application Type de document : texte imprimé Auteurs : P. Katkar, Auteur ; I. Sancheti, Auteur ; D. S. Bhutada, Auteur ; A. Rajput, Auteur ; S. Thorat, Auteur ; S. Radhakrishnan, Auteur ; A. Sabnis, Auteur ; Prakash A. Mahanwar, Auteur ; M. B. Kulkarni, Auteur Année de publication : 2020 Article en page(s) : p. 342-349 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Benzoxazine
Caractérisation
Cardanol
Epoxydes
Essais de brouillard salin
EthanolamineL'éthanolamine, également appelée 2-aminoéthanol ou monoéthanolamine, est un composé chimique organique qui est à la fois une amine primaire (par son groupe amine) et un alcool primaire (par son groupe hydroxyle). À l'instar des autres amines, la monoéthanolamine se comporte en base faible. L'éthanolamine est un liquide toxique, inflammable, corrosif, incolore et visqueux ; son odeur est similaire à celle de l'ammoniac.
Paraformaldéhyde
Phénols
Polybenzoxazine
Polyesters
Résistance à l'abrasion
Résistance au chocs
Résistance chimique
Réticulation (polymérisation)
Revêtements -- Propriétés mécaniques
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : A free hydroxyl-containing benzoxazine monomer was synthesised using bio-based card phenol, paraformaldehyde and ethanolamine by a Mannich condensation reaction. The hydroxyl-containing benzoxazine monomer synthesised was characterised by FT-IR spectroscopy. Curing of the benzoxazine was monitored by using Differential Scanning Calorimetry (DSC). The free hydroxyl group in the benzoxazine monomer helps to enhance the adhesion of polybenzoxazine coating with the metal substrate. The synthesised benzoxazine was copolymerised with an epoxy resin and a saturated polyester resin for potential coating applications and their curing was monitored using DSC and FT-IR spectroscopy. The benzoxazine-epoxy copolymerised system demonstrated enhanced mechanical, chemical and thermal properties compared to the benzoxazine-saturated polyester system as well as compared with neat polybenzoxazine. Note de contenu : - EXPERIMENTAL : Raw materials - Synthesis of card phenol-based benzoxazine - Blend preparation - Characterization
- RESULTS AND DISCUSSION : FT-IR analysis - DSC analysis - TGA analysis - Mechanical properties - Chemical resistance - Solvent scrub resistance - Stalt-spray test - Water absorption
- Scheme 1 : Synthesis of card phenol-based benzoxazine monomer and thermal polymerisation
- Scheme 2 : Curing reaction of hydroxyl-functional benzoxazine and epoxy resin
- Scheme 3 : Curing reaction of hydroxyl-functional benzoxazine and saturated polyester resin
- Scheme 4 : Chemical structure of unsaturated card phenol
- Table 1 : Sample compositions of BZ-EP and BZ-SPE coatings
- Table 2 : Char yield, temperature at 5% weight loss (T5%) and temperature at 10% weight loss (T10%) for polybenzoxazine and all BZ-EP and BZ-SPE compositions
- Table 3 : Mechanical properties of polybenzoxazine, BZ-EP and BZ-SPE coatings
- Table 4 : Acid and alkali resistance of polybenzoxazine, BZ-SPE coatings
- Fig. 1 : a) Polybenzoxazine, b) BZ-EP BZ 30/EP 70, c) BZ-SPE BZ 40/SPE 60 coating on mild steel panels
- Fig. 2 : FT-IR analysis of a) benzoxazine, b) saturated polyester and c) BZ-SPE BZ 40/SPE 60
- Fig. 3 : DSC thermogram of a) BZ-SPE and b) BZ-E° in temperature range of 30 to 550°C
- Fig. 4 : TGA thermograms of a) polybenzoxazine, b) saturated polyester, c) 30BZ/70EP and d) 40BZ/60SPE
- Fig. 5 : Scratch hardness and impact resistance of a) BZ-EP and b) BZ-SPE coatings
- Fig. 6 : Coating surface before and after the salt spray test in 3.5% NaCI solution for 120 hr (a) Polybenzoxazine, (b) BZ-EP and (c) BZ-SPE coatingsEn ligne : https://drive.google.com/file/d/1O2NT4Z_NqEeo0vFz5t-6Bq2E9luEEgAB/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34921
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Code-barres Cote Support Localisation Section Disponibilité 22448 - Périodique Bibliothèque principale Documentaires Disponible Crosslinked main-chain-type polybenzoxazine coatings for corrosion protection of mild steel / Xin Lu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 4 (07/2017)
[article]
Titre : Crosslinked main-chain-type polybenzoxazine coatings for corrosion protection of mild steel Type de document : texte imprimé Auteurs : Xin Lu, Auteur ; Liu Yan, Auteur ; Wenfei Zhang, Auteur ; Xueying Zhang, Auteur ; Changlu Zhou, Auteur ; Zhong Xin, Auteur Année de publication : 2017 Article en page(s) : p. 937-944 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique.
L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1.
C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.
Analyse électrochimique
Anticorrosion
Métaux -- Revêtements protecteurs
PolybenzoxazineIndex. décimale : 667.9 Revêtements et enduits Résumé : Bisphenol A/diaminodiphenylmethane (BA-ddm)-based polybenzoxazine precursor was synthesized from 4,4′-diaminodiphenylmethane, bisphenol A, and paraformaldehyde. The curing behavior of BA-ddm was studied by using differential scanning calorimeter and Fourier transform infrared spectrometer techniques. To verify the anticorrosion property, cured polybenzoxazine (PBA-ddm) coatings were prepared on mild steel (MS) through dip-coating and thermal curing methods. The surface properties of cured PBA-ddm coatings were characterized by microscopy and contact angle measurement. The electrochemical measurements were carried out to investigate the corrosion properties of PBA-ddm-coated MS. The results showed that PBA-ddm-coated MS samples exhibited high anticorrosive performance with the corrosion current reduced by two orders of magnitude than that of pristine MS. Note de contenu : - EXPERIMENTAL SECTION : Materials - Synthssis of BA-ddm - Preparation of PBA-ddm coating - Chemical structure characterisation - Curing behavior of BA-ddn - Surface properties - Electrochemical measurement
- RESULTS AND DISCUSSION : Curing behavior of BA-ddn precursor - Surface properties of PBA-ddm coating - Corrosion protection property - Corrosion protection mechanismDOI : 10.1007/s11998-016-9902-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9902-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28935
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Code-barres Cote Support Localisation Section Disponibilité 19194 - Périodique Bibliothèque principale Documentaires Disponible Development of functionalized SiO2–TiO2 reinforced cardanol and caprolactam modified diamine based polybenzoxazine nanocomposites for high performance applications in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 6 (11/2019)
[article]
Titre : Development of functionalized SiO2–TiO2 reinforced cardanol and caprolactam modified diamine based polybenzoxazine nanocomposites for high performance applications Type de document : texte imprimé Année de publication : 2019 Article en page(s) : p. 1737-1749 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion
Benzoxazine
Cardanol
Composés inorganiques -- Synthèse
Composés organiques -- Synthèse
Dioxyde de silicium
Dioxyde de titane
Matériaux -- Propriétés fonctionnelles
Métaux -- Revêtements protecteurs
Polybenzoxazine
Revêtements -- Analyse
Revêtements -- Propriétés thermomécaniques
Revêtements organiques
Transition vitreuseIndex. décimale : 667.9 Revêtements et enduits Résumé : In the present work, three types of polybenzoxazines were synthesized using caprolactam-based diamine (CPA-NH2) and formaldehyde with different phenols, namely 4-fluorophenol, cardanol, and phenol, under appropriate experimental conditions. The molecular structure of the benzoxazine monomers was confirmed by FTIR, 1H, and 13C NMR spectroscopic techniques. Polybenzoxazines were obtained through ring-opening polymerization of benzoxazine monomers, and their formation was confirmed by FTIR spectroscopy. The elemental composition and morphological behavior of polybenzoxazines were characterized by SEM-EDAX and AFM techniques. The naturally occurring cardanol- and caprolactam-based diamine (CPA-NH2)-based benzoxazine was selected for detailed studies. The synthesized SiO2–TiO2 nanohybrid reinforcement was functionalized with 3-aminopropyltrimethoxysilane (3-APS) and reinforced with cardanol-based benzoxazine (CPBz) monomer. The resulted nanocomposites were studied for their corrosion protection behavior against mild steel surface along with thermomechanical (TGA and DMA) and morphological (SEM, XRD, and TEM) properties. The results obtained from electrochemical impedance analysis indicate that the 5 wt% of F–SiO2–TiO2 of reinforced CPBz exhibits an effective corrosion-resistant behavior toward surface of steel specimen than that of other samples. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of caprolactam diamine (CPA-NH2) - Synthesis of phenol-based benzoxazine (PBz) - Synthesis of 4-fluorophenol-based benzoxazine (FPBz) - Synthesis of cardanol-based benzoxazine (CPBz) - Synthesis of SiO2 nanosilica - Preparation of SiO2-TiO2 and functionalized SiO2-TiO2 nanoparticles - Preparation of neat CPBz and F-SiO2-TiO2- reinforced CPBZ nanocomposites - Surface preparation of the mild steel specimens - Preparation of neat CPBz and F-SiO2-TiO2
- RESULTS AND DISCUSSION : FTIR analysis - NMR analysis - XRD analysis - Thermal properties - Dynamic mechanical analysis (DMA) - Morphological studiesDOI : 10.1007/s11998-019-00263-w En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-019-00263-w.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33427
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Code-barres Cote Support Localisation Section Disponibilité 21321 - Périodique Bibliothèque principale Documentaires Disponible Exploration of high corrosion resistance property of less hazardous pyrazolidine-based benzoxazines in comparison with bisphenol-F derivatives / M. Manoj in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 4 (07/2020)
[article]
Titre : Exploration of high corrosion resistance property of less hazardous pyrazolidine-based benzoxazines in comparison with bisphenol-F derivatives Type de document : texte imprimé Auteurs : M. Manoj, Auteur ; A. Kumaravel, Auteur ; R. Mangalam, Auteur ; P. Prabunathan, Auteur ; A. Hariharan, Auteur ; M. Alagar, Auteur Année de publication : 2020 Article en page(s) : p. 921-935 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique.
L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1.
C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.
Analyse toxicologique
Anticorrosion
Caractérisation
Métaux -- Revêtements protecteurs
Polybenzoxazine
Polymères -- Propriétés thermiques
Pyrazolidine bisphénol
Revêtements organiques
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : The present work describes the design of nontoxic pyrazolidine bisphenol (PYBP)-based hydrophobic benzoxazine (PBz) matrices, in comparison with that of bisphenol-F-based benzoxazines, and investigates their efficiency toward corrosion protection on mild steel surfaces. The preliminary in vitro toxicity assay studies infer the nontoxic nature of PYBP. Data obtained from thermal and surface studies indicate that the PYBP-based PBzs possess higher thermal stability than those of bisphenol-F benzoxazines. Observations from SEM images suggest that the inherent hydrophobic nature was due to the formation of rough surfaces. The corrosion studies of the specimens were carried out using open-circuit potential, electrochemical impedance spectroscopy, and potentiodynamic polarization. Among the mild steel specimens, coated with different benzoxazines, the poly(PYBP-oda)-coated specimen was found to be less aggressive toward corrosion showing 90% efficiency and charge transfer resistance (Rct) of 381 kΩ cm2. Thus, data obtained from different studies suggest that the PYBP-based benzoxazines can be used as a better coating material for steel and steel products against corrosion. Note de contenu : - EXPERIMENTAL : Chemicals - Synthesis of 1-(3,5-bis(4-hydroxyphenyl)-4, 5-dihydro-1H-pyrazol-1-yl)ethanone or pyrazolidine bisphenol (PYBP) - Preparation of pyrazolidine-bisphenol-based benzoxazine monomer (PYBP-dda, PYBP-oda, PYBP-fa) - - Synthesis of bisphenol-F-based benzoxazine monomer (BF-dda), BF-oda, BF-fa) - Preparation of benzoxazine-coated mild steel - Preparation of the coatings - Characterization
- RESULTS AND DISCUSSION : Toxicity studies - Curing behavior of benzoxazines - Thermal behavior - Morphological properties of polybenzoxazines - Morphological properties of polybenzoxazine-coated mild steel - Electrochemical studies of the coated and uncoated mild steel specimens : open-circuit potential (Eocp) analysis - Polarization and electrochemical impedance studies of coated and uncoated mild steel specimensDOI : https://doi.org/10.1007/s11998-019-00312-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00312-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34381
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Code-barres Cote Support Localisation Section Disponibilité 21864 - Périodique Bibliothèque principale Documentaires Disponible Flammability of benzoxazine resin based carbon fibre composite samples / Parth Lal in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 30, N° 3-4 (08/2020)
PermalinkIntercalated polybenzoxazine/organoclay composites with enhanced performance in corrosion resistance / Changlu Zhu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)
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