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Hydrophobization of nanocrystalline and microfibrillated cellulose using covalent grafting of plant oil-based copolymers / Tetiana Shevtsova in COATINGS TECH, Vol. 21, N° 1 (01-02/2024)
[article]
Titre : Hydrophobization of nanocrystalline and microfibrillated cellulose using covalent grafting of plant oil-based copolymers Type de document : texte imprimé Auteurs : Tetiana Shevtsova, Auteur ; Zoriana Demchuk, Auteur ; Oleh Shevchuk, Auteur ; Sergiy Minko, Auteur ; Andriy Voronov, Auteur Année de publication : 2024 Article en page(s) : p. 42-47 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact
CelluloseLa cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules.
Copolymères greffés
Energie de surface
Fibrilles de cellulose
Hydrophobie
Matériaux nanocristallins
Polymérisation en émulsion
Revêtements organiques
Traîtements de surfaceIndex. décimale : 667.9 Revêtements et enduits Résumé : Cellulose, a linear polysaccharide biopolymer, has applications in various industries including food packaging, personal care products, and construction, due to its unique physico-chemical properties, as well as its biocompatibility and biodegradability. This study introduces a methodology to enhance the hydrophobicity of nanocrystalline (CNC) and microfibrillated (MFC) cellulose, using the covalent attachment (grafting) of copolymers based on plant oils. Current methodologies for cellulose surface modification are limited in terms of hydrophobizing agents due to both their high cost and the fact that most are not renewable. This study focuses on the surface modification of CNC and MFC by graft copolymers from plant oil-based acrylic monomers (POBMs) developed by this research group. The grafting and the properties of the resulting copolymers were determined using Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and X-ray photoelectron spectroscopy (XPS) to demonstrate the presence of grafted POBMs and their impact on the characteristics of modified CNC and MFC. Note de contenu : - Scheme 1 : Grafting of HOSBM-DMAEMA copolymers onto cellulose
- Table 1 : Elemental analysis result for CNC and grafted CNC
- Table 2 : Water contact angle and surface energy of different formulationEn ligne : https://drive.google.com/file/d/1rq2g1IKXk7Y3abEDZxUrYWCPsRgaKbQY/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40429
in COATINGS TECH > Vol. 21, N° 1 (01-02/2024) . - p. 42-47[article]Hydrophobization, smoothing, and barrier improvements of cellulose nanofibril films by sol–gel coatings / Jari Vartiainen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : Hydrophobization, smoothing, and barrier improvements of cellulose nanofibril films by sol–gel coatings Type de document : texte imprimé Auteurs : Jari Vartiainen, Auteur ; Klaus Rose, Auteur ; Yukihiro Kusano, Auteur ; Juha Mannila, Auteur ; Lisa Wikström, Auteur Année de publication : 2020 Article en page(s) : p. 305-314 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact
Brillance (optique)
CelluloseLa cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules.
Copolymères
Couches minces
Hydrophobie
Matériaux -- Propriétés barrières
Matières plastiques -- Revêtement
Microscopie électronique à balayage
Nanofibres
Rugosité
Sol-gel, ProcédéIndex. décimale : 667.9 Revêtements et enduits Résumé : Single-layer films from cellulose nanofibrils on a plastic support were coated with sol–gel coated with inorganic–organic copolymers (ORMOCER®s), consisting of inorganic Si–O–Si-based networks combined with ceramic (Al–O– and Zr–O–) groups and special organic fluoroalkyl chain containing functional groups. Sol–gel coatings decreased the surface hydrophilicity and water vapor transmission rate. The water contact angle of uncoated films was 24°, indicating high affinity between water and the cellulose nanofibrils. All sol–gel coatings tested increased the surface hydrophobicity with the contact angles ranging between 54° and 102°. The water vapor transmission rates varied between 230 and 410 g/m2/day. With UV curable highly organically crosslinked coating, the water vapor transmission rate was decreased by 77% as compared to uncoated film. The uncoated film had oxygen transmission rates of 0.7 and 107 cc/m2/day at 50% and 80% RH, respectively. At high humidity conditions, the films tended to swell, thus allowing permeation to increase. Sol–gel coatings significantly improved the oxygen barrier properties especially at 80% RH. The transmission rates varied between 0.4 and 0.5 cc/m2/day (50% RH) and between 51 and 86 cc/m2/day (80% RH). Note de contenu : - Cellulose nanofibrils (CNF) and CNF films
- Sol-gel coatings
- Scanning electron microscopy (SEM)
- Roughness
- Gloss
- Contact angle measurements
- Oxygen permeation
- Water vapor permeationDOI : 10.1007/s11998-019-00292-5 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00292-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33747
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible Improving hydrophobicity on polyurethane-based synthetic leather through plasma polymerization for easy care effect / Burcak Karaguzel Kayaoglu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)
[article]
Titre : Improving hydrophobicity on polyurethane-based synthetic leather through plasma polymerization for easy care effect Type de document : texte imprimé Auteurs : Burcak Karaguzel Kayaoglu, Auteur ; Emre Ozturk, Auteur ; F. Seniha Güner, Auteur ; Tamer Uyar, Auteur Année de publication : 2013 Article en page(s) : p. 549-588 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact
Cuir synthétique
Hydrophobie
Polymérisation sous plasma
Polyuréthanes
Surfaces -- NettoyageIndex. décimale : 667.9 Revêtements et enduits Résumé : This study reports on the deposition of a hydrophobic coating on polyurethane (PU)-based synthetic leather through a plasma polymerization method and investigates the hydrophobic behavior of the plasma-coated substrate. The silicon compound of hexamethyldisiloxane (HMDSO), inactive gas argon (Ar), and toluene were used to impart surface hydrophobicity to a PU-based substrate. Surface hydrophobicity was analyzed by water contact angle measurements. Surface hydrophobicity was increased by deposition of compositions of 100% HMDSO, 3:1 HMDSO/toluene, and 1:1 HMDSO/toluene. Optimum conditions of 40 W, 30 s plasma treatment resulted in essentially the same initial contact angle results of approximately 100° for all three treatment compositions. The initial water contact angle for untreated material was about 73°. A water droplet took 1800 s to spread out on the plasma-treated sample after it had been placed on the sample surface. An increase in plasma power also led to a decrease in contact angle, which may be attributed to oxidization of HMDSO during plasma deposition. XPS analysis showed that plasma polymerization of HMDSO/toluene compositions led to a significant increase in atomic percentage of Si compound responsible for the hydrophobic surface. The easy clean results for the treated and untreated PU-based synthetic leather samples clearly showed that the remaining stain on the plasma-polymerized sample was less than that of untreated sample. The plasma-formed coating was both hydrophobic and formed a physical barrier against water and stain. Note de contenu : - EXPERIMENTAL : Plasma treatment - Contact angle measurements - Easy clean property - Scanning electron microscopy (SEM) - X-ray photoelectron spectroscopy (XPS)
- RESULTS AND DISCUSSION : Water contact angle measurements - Surface roughness - X-ray photoelectron spectroscopy (XPS)DOI : 10.1007/s11998-013-9470-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9470-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19104
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Code-barres Cote Support Localisation Section Disponibilité 15460 - Périodique Bibliothèque principale Documentaires Disponible 15594 - Périodique Bibliothèque principale Documentaires Disponible Improving the wettability and antiprotein adsorption property of PDMS by swelling–deswelling approach / Xue-Ke Xia in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 2 (03/2019)
[article]
Titre : Improving the wettability and antiprotein adsorption property of PDMS by swelling–deswelling approach Type de document : texte imprimé Auteurs : Xue-Ke Xia, Auteur ; Xiao-Hong Wang, Auteur ; Wei Zhang, Auteur ; Xue-Lian Han, Auteur ; Ping Chen, Auteur ; Yong Jiang, Auteur Année de publication : 2019 Article en page(s) : p. 353-361 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adsorption
Angle de contact
Caractérisation
Chimie des surfaces
Heptaméthyltrisiloxane
Microscopie à force atomique
Mouillabilité
PolydiméthylsiloxaneLe polydiméthylsiloxane —[O-Si(CH3)2]n—, ou poly(diméthylsiloxane) selon la nomenclature systématique, communément appelé PDMS ou diméthicone, est un polymère organominéral de la famille des siloxanes souvent présent dans les shampoings. On l'y ajoute pour augmenter le volume des cheveux mais il peut également aller boucher les pores du cuir chevelu et rendre les cheveux gras. C'est une des raisons pour lesquelles se laver les cheveux tous les jours est très déconseillé avec un shampooing contenant des silicones.
Il existe également de l'amodiméthicone, qui est un dérivé du diméthicone.
Le polydiméthylsiloxane est un additif alimentaire (E900), utilisé comme antimoussant dans les boissons (Coca-Cola BlāK).
La chaîne de poly(diméthylsiloxane) forme également la structure de base des huiles et des caoutchoucs silicones.
Polymères -- Propriétés optiques
Réfraction, Indice de
Revêtements -- Propriétés mécaniques
Spectroscopie de photoélectrons
Surfactants
Toxicologie cellulaire
TransmittanceLa transmittance, en général, est le rapport caractérisant la transmission d'une grandeur dans un système. Elle se calcule par le rapport entre la grandeur en entrée et en sortie.
En optique, la transmittance d'un matériau ou d'un filtre est la fraction du flux lumineux le traversant. Elle est également nommée facteur de transmission mais aussi transparence dans le domaine de la photographie.Index. décimale : 667.9 Revêtements et enduits Résumé : In order to improve the wettability and antiprotein adsorption property of PDMS, heptamethyltrisiloxane (a well-known superspreader) was coated onto the PDMS substrates by a swelling–deswelling process. PDMS films were first immersed in heptamethyltrisiloxane solution mixtures to coat heptamethyltrisiloxane onto PDMS. During the deswelling process, the hydrophobic siloxane group of the superspreader heptamethyltrisiloxane was trapped in the PDMS matrix, while the hydrophilic group EO was exposed to the surface. In this manner, heptamethyltrisiloxane was finally coated on the PDMS surface via swelling–deswelling process. Contact angle measurements, optical property analyses, X-ray photoelectron spectroscopy, and atomic force microscopy were used to confirm that durable hydrophilic and transparent PDMS surfaces were successfully obtained. The PDMS surface wettability could be adjusted by tuning the solubility parameters of the solution mixture. Additionally, antiprotein adsorption property was investigated and the result indicated the heptamethyltrisiloxane was tethered onto the PDMS surface. The swelling–deswelling method can be applied for the modification of other crosslinked polymers to obtain antifouling surfaces and functional materials for biomedical applications. Note de contenu : - EXPERIMENTAL SECTION : Materials - Fabrication of PDMS films - Swelling-deswelling process of PDMS - Contact angle measurement - Mechanical properties - Refractive index and light transmittance measurements - X-ray photoelectron spectroscopy (XPS) - Atomic force microscopy (AFM) measurements - Protein adsorption test - MTT cytotoxicity
- RESULTS AND DISCUSSION : Swelling of PDMS - Contact angle and long-term stability - Optical and mechanical properties of modified PDMS - Surfact characterization - Protein adsorption and cell compatibilityDOI : 10.1007/s11998-018-0070-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0070-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32409
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Code-barres Cote Support Localisation Section Disponibilité 20894 - Périodique Bibliothèque principale Documentaires Disponible Influence of chain length of organic modifiers in hydrophobization process on epoxy resin properties / G. Morgiante in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 4 (07/2022)
[article]
Titre : Influence of chain length of organic modifiers in hydrophobization process on epoxy resin properties Type de document : texte imprimé Auteurs : G. Morgiante, Auteur ; M. Pilkowski, Auteur ; J. Marczak, Auteur Année de publication : 2022 Article en page(s) : p. 1045-1053 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Angle de contact
Caractérisation
Eau
Energie de surface
Epoxydes
Glace sèche
Matériaux -- Modifications chimiques
Mouillabilité
Mouillage (chimie des surfaces)
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Resins have been widely used in a variety of industry fields for more than a century, such as coatings, adhesives, or automotive. Their low cost and workability are extremely useful in creating more and more advanced materials due to their chemical structure (Ghaffari et al. in Surf Interfaces 17:100340, 2019). Common problem today is the wetting tendency of various materials which in the end can result in further damage in the structure because of atmospheric conditions. Nowadays, scientists are trying to find better ways to improve the properties of coatings or composites in cases like hydrophobicity or icephobicity. One of the examp les are fluorinated organic compounds with good linking properties to the substrate (Qin et al. in Mater Today Commun 22:100770, 2020). Because o f that, to im prove the properties of a basic epoxy resin, its chain has been modified with hydrophobic compounds with different chain lengths. Influence of modifiers’ molecule size on hydrophobic and ice adhesion properties of obtained epoxy resins has been tested. Chemical composition of prepared coatings was analyzed by FTIR. Moreover, their thermal stability was investigated using TG and DSC measurements. Additionally, wettability of the samples was analyzed with a goniometer. Furthermore, their ice adhesion tests were performed on a dedicated apparatus. As a result, presented work provides a critique overview and concept of promising icephobic and hydrophobic coatings in the industry. Moreover, these products have a high chance to be developed further. Note de contenu : EXPERIMENTAL METHODS AND MATERIALS : Materials - Epoxy resin coatings preparation - Characterization - Water contact angle (WCA) measurements and surface free energy (SFE) - Ice adhesion - Fourier-transform infrared (FTIR) spectroscopy - Thermogravimetry (TG) - Differential scanning calorimetry (DSC)
- RESULTS AND DISCUSSION : Water contact angle (WCA) measurements and surface free energy (SFE) - Ice adhesion - Thermogravimetry (TG) - Differential scanning calorimetry (DSC)DOI : https://doi.org/10.1007/s11998-021-00583-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00583-w.pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38034
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PermalinkInverse gas chromatography, surface properties, and interactions among components of paint formulation / A. Ziani in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 71, N° 893 (06/1999)
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