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Development of direct contact-killing non-leaching antimicrobial polyurethanes through click chemistry / Kaimei Peng in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 6 (11/2018)
[article]
Titre : Development of direct contact-killing non-leaching antimicrobial polyurethanes through click chemistry Type de document : texte imprimé Auteurs : Kaimei Peng, Auteur ; Xuexin Dai, Auteur ; Haili Mao, Auteur ; Hongtao Zou, Auteur ; Zaibo Yang, Auteur ; Weiping Tu, Auteur ; Jianqing Hu, Auteur Année de publication : 2018 Article en page(s) : p. 1239-1250 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antimicrobiens
BenzisothiazolinoneLa benzisothiazolinone est un biocide très répandu faisant partie du groupe d´isothiazolinone. Utilisé comme agent conservateur dans la peinture, le vernis et l´adhésif, il a un effet fongicide.
Caractérisation
Chimie click
Composés organiques -- Synthèse
Polyuréthanes
Résistance à l'humidité:Résistance à l'eau
Revêtements -- Propriétés thermiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : A robust, efficient, and orthogonal click chemistry (copper (I)-catalyzed alkyne-azide cycloaddition) was used to prepare an antimicrobial polymer and precisely control the conjugation ratio of antibiotic molecules to polymer. Antimicrobial polyurethanes with pendant benzisothiazolinone (PU-BIT) were synthesized using click chemistry to connect azide functional polyurethane (PU-N3) and alkyne functional benzisothiazolinone (BIT-Al). The direct contact-killing and non-leaching antimicrobial properties of PU-BIT were verified by both antimicrobial drop and disk diffusion. This approach provides a new methodology and platform for the development of contact-killing and non-leaching antimicrobial materials for a variety of practical applications. This research is the first to demonstrate that the broad-spectrum BIT antibiotic is a selective antibiotic for Gram-positive bacteria when covalently linked to a polymer. PU-BIT film containing 0.8 wt% BIT exhibited a selective antimicrobial performance with bactericidal efficacy of 91.6% and 30% against Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli, respectively. The mechanism of the selective antimicrobial activity of PU-BIT is also discussed. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis - Characterization
- RESULTS AND DISCUSSION : Monomers and polymers synthesis - Thermal properties - Water-resistance property - Antimicrobial activityDOI : 10.1007/s11998-018-0068-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0068-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31334
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Code-barres Cote Support Localisation Section Disponibilité 20388 - Périodique Bibliothèque principale Documentaires Disponible Development of flame-retardant waterborne polyurethane dispersions (WPUDs) from sulfonated phosphorus-based reactive water-dispersible agents / Dwij Dave in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 4 (07/2021)
[article]
Titre : Development of flame-retardant waterborne polyurethane dispersions (WPUDs) from sulfonated phosphorus-based reactive water-dispersible agents Type de document : texte imprimé Auteurs : Dwij Dave, Auteur ; Siddhesh Mestry, Auteur ; Shashank T. Mhaske, Auteur Année de publication : 2021 Article en page(s) : p. 1037–1049 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Composés organiques -- Synthèse
Dispersions et suspensions
Formulation (Génie chimique)
IgnifugeantsComposé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
Itaconique, Acide
Polymères ignifuges
Polyuréthanes
Revêtements -- Propriétés mécaniques
Revêtements -- Propriétés thermiques
Revêtements en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : The current study presents an attempt to develop two molecules, namely sulfonated aromatic diol (SAD) and sulfonated aromatic diamine (SADAM), to induce flame retardancy, thermal stability, and dispersion ability for water-based polyurethane dispersions (WPUDs). The previously reported itaconic acid-based polyester polyol was used for prepolymer synthesis as well as for chain extension. Pre- and post-sulfonated compounds were subjected to characterization tests such as FTIR, 13C-NMR, 1H-NMR, and CHNS for confirmation of their structures. The standard dispersant used for the basis of comparison was commercially available dimethyl propionic acid (DMPA). WPUDs were synthesized in different molar concentrations of DMPA, SAD, and SADAM, and the covalent incorporation of all three molecules in the polymer backbone was confirmed by FTIR. The WPUD films were subjected to various thermal tests like TGA and DSC as well as mechanical tests like flexibility and pencil hardness. WPUD films obtained from SADAM showed a remarkable increase in Tg as well as char content. The THRI values for SAD- and SADAM-based films were better than DMPA-based films. SAD- and SADAM-based WPUD films also showed an increase in LOI value and UL-94 ratings with the maximum LOI value of 26. Dispersions based on DMPA showed better stability as compared to dispersions based on SAD and SADAM. Note de contenu : - MATERIAL AND METHODS : Materials - Synthesis of an aromatic diol (I-1) - Synthesis of aromatic diamine (I-2) - Sulfonation of I-1 and I-2Synthesis of WPUD - Characterization
- RESULTS AND DISCUSSION : CHNS analysis - Physicochemical analysis - FTIR and 1H-NMR analyse - Particle size and zeta potential analysis - Thermal properties - Mechanical properties - Flame-retardant properties
- Table 1 : Formulation used for WPUD synthesis
- Table 2 : UL-94 rating description
- Table 3 : Physicochemical analysis
- Table 4 : Particle size and zeta potential analysis
- Table 5 : Thermal properties of WPUD films
- Table 6 : Mechanical properties of WPUD films
- Table 7 : pH of WPUDs
- Table 8 : Onset and offset data of TGADOI : https://doi.org/10.1007/s11998-020-00458-6 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00458-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36213
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Code-barres Cote Support Localisation Section Disponibilité 22969 - Périodique Bibliothèque principale Documentaires Disponible Development of micro-nanocomposites with antibacterial effect for leather and textile / Anna Bacardit in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 7 (07/2016)
[article]
Titre : Development of micro-nanocomposites with antibacterial effect for leather and textile Type de document : texte imprimé Auteurs : Anna Bacardit, Auteur ; Concepcio Casas, Auteur ; Jordi Bou, Auteur ; Lluis Ollé, Auteur Année de publication : 2016 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antimicrobiens
Argent
Caractérisation
Cuirs et peaux -- Conservation
Encapsulation
Huiles et graisses végétales
Nanoparticules
Polymères
Revêtements
Textiles et tissus à usages techniquesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The aim of this work was to develop new systems of micro/nanocomposites to confer new functions to materials used for seats of public vehicles and public spaces. Specifically, this study focuses on antibacterial effect for leather and technical textile substrates.
The first stage of the research consists of a selection of micro/micro/nanomaterials and active principles: selection and evaluation of micro/nanoparticles, antibacterial and antifungal substances. In the second stage, the process of encapsulation of active principles was studied. The research includes optimization of the encapsulation process by improving the size and stability of the capsules. In addition, the synthesis of a hybrid organic-inorganic polymer acting as a micro/micro/nanomaterial carrier was developed.
To understand the mechanisms of synthesis and action of micro/micro/nanomaterials, characterization techniques have been used: scanning electron microscopy SEM and optical microscopy, analysis and distribution of particle size (DLS, Zetasizer). Regarding the antibacterial and antifungal ability of micro/nanocomposites, we adapted standard ASTM 2180-07 "Test methods for determining the activity or incorporated antimicrobial agent (s) in polymeric or hydrophobic materials."
Different products have been developed and the results obtained allow us to conclude that the synthesized products showed inhibition to the growth of bacteria and fungi on the contact surface.Note de contenu : - EXPERIMENTAL : Reagents - Characterization of the products obtained
- RESULTS : Encapsulation of natural oils of antibacterial effect - Synthesis of coatings with polymers incorporating reactants with known antibacterial effects in their structure - Synthesis of coatings with silver particles - Characterization of the selected compounds - Bactericidal and fungicidal capacity of the selected compoundsEn ligne : https://drive.google.com/file/d/1jbqgQWk9lSXQCavzQ6FD1VT6SCfpsPBj/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26717
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Code-barres Cote Support Localisation Section Disponibilité 18213 - Périodique Bibliothèque principale Documentaires Disponible Development of multifunctional Si-Ca-PEG-nAg sol–gel implant coatings from calcium-2-ethoxyethoxide in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 4 (07/2021)
[article]
Titre : Development of multifunctional Si-Ca-PEG-nAg sol–gel implant coatings from calcium-2-ethoxyethoxide Type de document : texte imprimé Année de publication : 2021 Article en page(s) : p. 1177–1189 Note générale : Bibliogr. Langues : Américain (ame) Catégories : 3-Glycidoxypropyltrimethoxysilane
Antibactériens
Argent
Calcium
Caractérisation
Chimie des surfaces
Couches minces
Implants médicaux
Matériaux hybrides
Polyéthylène glycol
Prothèses
Revêtements
Silicium
TitaneIndex. décimale : 667.9 Revêtements et enduits Résumé : Titanium implant success is compromised by microbial biofilms and aseptic loosening. This research aimed to develop robust multifunctional class II organic-inorganic hybrid coatings for implants with osteoconductive and antibacterial properties. 3-Glycidoxypropyltrimethoxysilane was coupled with organic polymer poly(ethylene) glycol-diamine (PEG-NH2) for integration into an inorganic sol backbone composed of tetraethoxysilane and calcium, which was sourced from newly synthesized calcium-2-ethoxyethoxide. Nuclear magnetic resonance and attenuated total reflectance Fourier transform infrared spectroscopy confirmed synthesis of precursors and the structure of coating constituents. Scanning electron microscopy and energy-dispersive X-ray spectroscopy (EDS) demonstrated homogenous coatings, micro-topographical surface features, and apatite-like ex vivo mineralization in simulated body fluid. Tensile adhesion testing demonstrated robust and highly adherent (15.1 ± 3.3 MPa) coatings on titanium substrates. Hybrid coatings imbedded with silver nanoparticles (nAg) significantly inhibited (P < 0.05) Staphylococcus aureus and Escherichia coli planktonic cultures and biofilm formation. These Si-Ca-PEG-nAg hybrid coatings for titanium implants offer robust multifunctional features. Note de contenu : - MATERIALS AND METHODS : Preparation of coating materials - Characterization of coatings
- RESULTS AND DISCUSSION : Materials characterization
- Table 1 : Composition of hybrid coatings
- Table 2 Ionic composition of simulated body fluid and human blood plasmaDOI : https://doi.org/10.1007/s11998-021-00477-x En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00477-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36223
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Code-barres Cote Support Localisation Section Disponibilité 22969 - Périodique Bibliothèque principale Documentaires Disponible Development of nano bio aldehyde tanning agent for sustainable leather manufacture / Arjunan Yasothai in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 4 (04/2023)
[article]
Titre : Development of nano bio aldehyde tanning agent for sustainable leather manufacture Type de document : texte imprimé Auteurs : Arjunan Yasothai, Auteur ; Gladstone Christopher Jayakumar, Auteur ; Angayarkanny Subramanian, Auteur ; Swarna Vinodh Kanth, Auteur Année de publication : 2023 Article en page(s) : p. 162-168 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents de tannage
AldéhydesUn aldéhyde est un composé organique, faisant partie de la famille des composés carbonylés, dont l'un des atomes de carbone primaire (relié au plus à 1 atome de carbone) de la chaîne carbonée porte un groupement carbonyle.
L'aldéhyde le plus simple est le formaldéhyde (ou méthanal), aussi appelé formol lorsqu'il est en solution aqueuse.
Un aldéhyde dérive formellement d'un alcool primaire (oxydation) dont le groupement hydroxyde -OH est en bout de chaîne et se forme suite à l'enlèvement de deux atomes H d'où le nom "alcool déshydrogéné" ou aldéhyde.
Biopolymères
Caractérisation
Cuirs et peaux
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux -- Propriétés organoleptiques
Cuirs et peaux -- Propriétés physiques
Essais dynamiques
Morphologie (matériaux)
Nanoparticules
Post-tannage
Stabilité hydrothermale
Tannage organique
Température de retraitIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Exploring the application of natural biopolymers in leather manufacture is a need of the hour to achieve sustainability. The present research work explores the possibility of using modified biopolymer nanoparticles as a tanning agent. Starch, a polysaccharide with high functionalization, is converted into Nano Bio Aldehyde (NBA) through periodate oxidation as water-in-oil microemulsion method. The synthesized product was characterized by its physico-chemical nature. The prepared NBA shows an aldehyde content of 85%, which endorses its application as a tanning agent. Experimental leather trials were carried out to assess the tanning efficacy and found that NBA tanned leathers show a shrinkage temperature of 90°C. Physical characteristics of the experimental leathers were found to be 24 N/mm2 and 90 N for tensile and tear strength, respectively. The study provides a holistic understanding of modified biopolymer as a nano tanning agent to manufacture leather. Note de contenu : - MATERIALS AND METHODS : Materials
- METHODS : Preparation of nanobioaldehyde particles - Characterization of the product NBA : Determination of aldehyde content - Fourier Transform Infrared (FTIR) analysis - Particle size analysis - Thermogravimetric analysis (TGA) - Differential Scanning Calorimetric (DSC) analysis - Preparation of DAS and NBA tanned leathers - Characterization of DAS and NBA tanned leathers hydrothermal stability measurement - Mechanical strength - Subjective evaluation of cprocessed leathers - Morphological evaluation
- RESULTS AND DISCUSSION : Structural alterations in NBA - The morphological structure of SS and NBA - Characteristics of the prepared particles - Thermal properties of SS and NBA - Hydrothermal resistance of tanned leathers - Physical strength characteristics of the crust leathers - Subjective evaluation of the tanned crust leathers - Morphological structures of control and experimental tanned leathers
- Table 1 : Experimental NBA tanning process
- Table 2 : Post tanning process
- Table 3 : Physical strength properties of control and experimental NBA tanned leather
- Table 4 : Organoleptic properties of NBA tanned leatherDOI : https://doi.org/10.34314/jalca.v118i4.7208 En ligne : https://drive.google.com/file/d/1Mx9yT5dde0Awk0tShiDIUvsrqIc5RIkt/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39185
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Code-barres Cote Support Localisation Section Disponibilité 24030 - Périodique Bibliothèque principale Documentaires Disponible Development of nano-magnesium oxide modified hybrid resin system for antimicrobial coating / Ujjal Kumar Dey in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 1 (01/2023)
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