Biomass adenosine triphosphate filler for improving the fire resistance and smoke suppression of intumescent coatings / Shaowu Ke in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 3 (05/2024) . - p. 1049-1065 Titre : Biomass adenosine triphosphate filler for improving the fire resistance and smoke suppression of intumescent coatings Type de document : texte imprimé Auteurs : Shaowu Ke, Auteur ; Cheng Wang, Auteur ; Yongjun Shu, Auteur ; Junfeng Yang, Auteur ; Qilin Liang, Auteur ; Qi Zhang, Auteur ; Zhitian Liu, Auteur Année de publication : 2024 Article en page(s) : p. 1049-1065 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adénosine triphosphate L’adénosine triphosphate, ou ATP, est un nucléotide formé à partir d'un nucléoside à un triphosphate. Dans la biochimie de tous les êtres vivants connus, l'ATP fournit l'énergie nécessaire aux réactions chimiques du métabolisme, à la locomotion, à la division cellulaire, ou encore au transport actif d'espèces chimiques à travers les membranes biologiques. Afin de libérer cette énergie, la molécule d'ATP est clivée, par hydrolyse, en adénosine diphosphate (ADP) et en phosphate, réaction qui s'accompagne d'une variation d'enthalpie libre standard ΔG0′ de −30,5 kJ mol−1. Les cellules régénèrent ensuite l'ATP à partir de l'ADP essentiellement de trois manières différentes : par phosphorylation oxydative dans le cadre de la respiration cellulaire, par photophosphorylation dans le cadre de la photosynthèse, et par phosphorylation au niveau du substrat au cours de certaines réactions chimiques exergoniques, par exemple au cours de la glycolyse ou du cycle de Krebs. Ainsi, le corps humain ne contient à chaque instant qu'environ 250 g d'ATP mais consomme et régénère chaque jour de l'ordre de son propre poids en ATP. Biomatériaux Calorimétrie Caractérisation Formulation (Génie chimique) Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface. Intumescence (chimie) Résistance à l'humidité:Résistance à l'eau Résistance à la flamme Revêtements -- Analyse Revêtements -- Propriétés thermiques Revêtements en phase aqueuse Revêtements protecteurs Stabilité thermique Index. décimale : 667.9 Revêtements et enduits Résumé : In recent years, green environment protection has received widespread research interest. In this study, a green, bio-based compound, adenosine triphosphate (ATP), was introduced into the intumescent flame retardant system to improve the flame retardant properties of waterborne fireproof coatings. The flame retardant properties of the sample with 2 wt% ATP were characterized by fire resistance tests, thermogravimetric analysis, cone calorimetric analysis, and other tests. The results revealed that the 2 wt% ATP coating sample exhibited a reduced fire resistance temperature of approximately 73°C at 60 min compared with that of the blank sample (i.e., the unmodified sample), and the residual carbon increased from 28% to 36% at 800°C. Furthermore, the peak of the heat release rate and the total heat release for the sample with 2 wt% ATP were 7.87% and 14.10% lower than those for the blank sample, respectively. Additionally, the total smoke production and peak smoke release rate for the modified sample were 33.60% and 22.54% lower than those for the blank sample, respectively. Therefore, this work provides a good prospect for the application of bio-based ATP, which can be applied in the fabrication of fire-resistant and smoke-suppressive coatings for structural steel and also provides a simple and efficient strategy for green, bio-based flame retardants, which is expected to expand their application scope in fireproof coatings. Note de contenu : - MATERIALS AND METHODS : Materials - Solid content - Preparation of coatings - Characterization - RESULTS AND DISCUSSION : Fire resistance analysis - Muffle burning test - Thermal stability of the coatings - Semi-quantitative calculation of synergies - Cone calorimetric analysis of the fireproof coatings - Scanning electron microscopy analysis - Raman spectroscopy of the carbon layer - X-ray photoelectron spectroscopy analysis - Infrared spectrum analysis of the carbon layer - Water tolerance of the coatings - Flame retardant mechanism analysis - Table 1 : The formulation of the intumescent coatings DOI : https://doi.org/10.1007/s11998-023-00871-7 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00871-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41076 [article]

Réservation

Réserver ce document

Exemplaires (2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
24737	-	Périodique	Bibliothèque principale	Documentaires	Disponible
24688	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Effect of microencapsulated ammonium polyphosphate on the durability and fire resistance of waterborne intumescent fire-retardant coatings / Zhitian Liu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 1 (01/2019)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 1 (01/2019) . - p. 135-145 Titre : Effect of microencapsulated ammonium polyphosphate on the durability and fire resistance of waterborne intumescent fire-retardant coatings Type de document : texte imprimé Auteurs : Zhitian Liu, Auteur ; Mengqin Dai, Auteur ; Qinghua Hu ; Shi Liu ; Xiang Gao ; Fan Ren ; Qi Zhang Année de publication : 2019 Article en page(s) : p. 135-145 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Durée de vie (Ingénierie) Encapsulation Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface. Polyphosphate d'ammonium Revêtements en phase aqueuse -- Additifs Index. décimale : 667.9 Revêtements et enduits Résumé : Large-scale addition of hydrophilic solid filler (i.e., ammonium polyphosphate) into waterborne intumescent fire-retardant coatings can cause many problems such as poor compatibility, easy absorption of moisture, and poor durability. In this work, microencapsulated ammonium polyphosphate with melamine formaldehyde resin (MFAPP) was prepared and applied in intumescent fire-retardant coatings to solve the problems mentioned. Due to the hydrophobicity of melamine formaldehyde (MF) resin, MFAPP exhibited better water resistance, thermal stability, and compatibility with polymer matrix, which was confirmed by Fourier transform infrared spectra, scanning electron microscopy (SEM), particle size test, water solubility, water contact angle, and thermogravimetric analysis (TGA). The effect of the MFAPP on durability and fire resistance of the fire-retardant coatings test were investigated by the static immersion test, fire resistance test, TGA, and SEM. Even immersed in distilled water for 12 h, the coatings containing MFAPP did not show obvious damage, indicating microencapsulation improved the water resistance of coatings. Furthermore, the fire-resistant time and thermal stability of the waterborne intumescent fire-retardant coatings were also improved remarkably by utilizing the microencapsulation of ammonium polyphosphate. Note de contenu : - EXPERIMENTAL : Materials - Preparation of samples - Fourier transform infrared (FTIR) spectra - The particle size and distribution of MFAPP and APP - Scanning electron microscopy (SEM) - Solubility in water of MFAPP and APP - Contact angle analysis - The static immersion test - Fire resistance test - Thermogravimetric analysis (TGA) - RESULTS AND DISCUSSION : Characterization of MFAPP - Fire resistance of the coatings - Thermal properties of MFAPP and fire-retardant coating containing MFAPP - Hydrophobicity of MFAPP and coating - Fire protection and thermal properties of coatings after the static immersion test - Table 1 : The formulation of the intumescent fire-retardant coatings DOI : 10.1007/s11998-018-0108-x En ligne : https://link.springer.com/article/10.1007/s11998-018-0108-x Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31977 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
20659	-	Périodique	Bibliothèque principale	Documentaires	Disponible

A facile strategy to fabricate an intumescent fire-retardant coating with improved fire resistance and water tolerance for steel structure / Siqi Huo in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 5 (09/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 5 (09/2020) . - p. 1401–1411 Titre : A facile strategy to fabricate an intumescent fire-retardant coating with improved fire resistance and water tolerance for steel structure Type de document : texte imprimé Auteurs : Siqi Huo, Auteur ; Chen Wang, Auteur ; Qinghua Hu, Auteur ; Shi Liu, Auteur ; Qi Zhang, Auteur ; Zhitian Liu, Auteur Année de publication : 2020 Article en page(s) : p. 1401–1411 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Borate de zinc Caractérisation Combustion Encapsulation Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface. Intumescence (chimie) Morphologie (matériaux) Polyphosphate d'ammonium Résistance à l'humidité:Résistance à l'eau Revêtements -- Propriétés thermiques Revêtements protecteurs Stabilité thermique Index. décimale : 667.9 Revêtements et enduits Résumé : An intumescent fire-retardant coating (IFRC) with improved fire resistance and water tolerance was prepared in this work, resulting from the introduction of microcapsuled ammonium polyphosphate (MFAPP) and zinc borate (MFBZ). The as-prepared coating exhibited great fire resistance and smoke suppression. In the cone calorimetry test, adding only 6 wt% MFBZ dramatically reduced the peak heat release rate, total heat release, and total smoke release by ~ 23.4%, ~ 54.7%, and ~ 81.1%, respectively. In addition, the water resistance and thermal stability of the coatings were also characterized. The char yield of IFRC noticeably increased to 41.7%, indicating good high-temperature stability. Besides, the IFRC showed a water contact angle of 90.1° and maintained good structure and fire resistance after being soaked by water, indicating great water resistance. The enhanced performance portfolio was mainly due to the synergistic effects of ammonium polyphosphate, pentaerythritol, melamine, and zinc borate, and the hydrophobicity of melamine–formaldehyde resin (MF). This work offers an effective approach for the preparation of waterborne intumescent fire-retardant coatings with great fire resistance and water tolerance. Note de contenu : - EXPERIMENTAL : Materials - Sample preparation - Characterization - RESULTS AND DISCUSSION : Characterization of MFBZ - Thermal properties of coatings - Fire resistance and combustion behaviors of coatings - Char morphology - Water resistance of coatings DOI : https://doi.org/10.1007/s11998-020-00360-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00360-1.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34582 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
22303	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Investigating the impact of sebum secretion on liquid makeup foundation darkening and its solution / Qi Zhang in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 46, N° 1 (02/2024)  

[article]  inINTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 46, N° 1 (02/2024) . - p. 142-152 Titre : Investigating the impact of sebum secretion on liquid makeup foundation darkening and its solution Type de document : texte imprimé Auteurs : Qi Zhang, Auteur ; Gang Chen, Auteur ; Yifan Hou, Auteur ; Sijing Wang, Auteur ; Qianru Xia, Auteur ; Jing Yu, Auteur Année de publication : 2024 Article en page(s) : p. 142-152 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cosmétiques Dispersions et suspensions Fond de teint Formulation (Génie chimique) Maquillage Noircissement Pigments Sébum Index. décimale : 668.5 Parfums et cosmétiques Résumé : - Objectives : Darkening has been an issue of concern for foundation products. The secretion of sebum plays a significant role in the process of foundation darkening, but the underlying mechanisms and solutions have been rarely reported. The aim of this study was to explore the relationship between sebum secretion and liquid foundation darkening and to provide possible solutions for reducing sebum-induced darkening in liquid foundation. - Methods : Artificial sebum in different concentrations was added to a basic liquid foundation to simulate different stages of sebum secretion. The colour of the mixture was then measured by a spectrophotometer on the standard opacity chart. Potential technical solutions for anti-darkening were applied to a basic liquid foundation, and its ability to anti-darkening was further verified in vivo. - Results : (1) The influences of sebum addition on liquid foundation darkening had a significant positive correlation with the increase in transmissivities (R2 = 0.852, p < 0.01). (2) A certain range of sebum addition can reduce the darkening of volatile foundations. (3) The liquid foundations using pigments with high dispersibility in sebum were less influenced by sebum. (4) The replacement of pigments with oil-fixing ability could effectively reduce the darkening of liquid foundations induced by sebum (p < 0.01). - Conclusion : The effect of sebum on the darkening of liquid foundation was accompanied by a greater transmissivity as its pigment concentration decreased. Balanced volatility, the addition of powders with higher sebum dispersibility and the replacement of oil-fixing powders could reduce the darkening of the liquid foundation caused by sebum secretion. Note de contenu : - MATERIALS AND METHODS : Equipment and materials - Preparation of basic liquid foundation - Preparation of artificial sebum - In vitro study - Volatility test - Dispersion test - Oil-fixing ability test - In vivo test - Data analysis - RESULTS AND DISCUSSION : Effect of sebum-induced increase in transmissivity on the darkening of basic liquid foundation - Effect of sebum supplementation on the darkening of volatile liquid foundation - Effect of the dispersion of pigments in sebum on the darkening of liquid foundation induced by sebum secretion - Effect of pigments with different oil-fixing abilities on the darkening of basic foundation induced by sebum secretion - Development of an anti-darkening foundation for oily skin - Table 1 : Specific information on titanium dioxide and zinc oxide - Table 2 : The formula of the basic liquid foundation - Table 3 : The L* of standard opacity chart and basic liquid foundation - Table 4 : The volatile substances of different liquid foundation samples - Table 5 : Turbidity of different pigments - Table 6 : The description of the coefficients of the fitted curves - Table 7 : Volume of oil fixation by different zinc oxide powders and titanium dioxide. Data are represented as mean±SD (n=3) - Table 8 : The formula of in vivo liquid foundation. DOI : https://doi.org/10.1111/ics.12939 En ligne : https://drive.google.com/file/d/13jOy971IsBuXbPu2twuvwx4S4rnz8SGf/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40586 [article]

Exemplaires

Code-barres	Cote	Support	Localisation	Section	Disponibilité
aucun exemplaire

Organic fluorosilicone modified waterborne polyurethane leather finishing agent / Zhao Wenjing in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 1 (01-02/2023)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 1 (01-02/2023) . - p. 1-4 Titre : Organic fluorosilicone modified waterborne polyurethane leather finishing agent Type de document : texte imprimé Auteurs : Zhao Wenjing, Auteur ; Sui Zhihui, Auteur ; Qi Zhang, Auteur ; Deng Lihua, Auteur ; Li Zeyang, Auteur ; Zu Bin, Auteur Année de publication : 2023 Article en page(s) : p. 1-4 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Cuirs et peaux -- Finition Douceur (toucher) Fluorosilicones Granulométrie Hydrophobie Polymères en émulsion Polymérisation en émulsion Polyuréthanes Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In order to improve the hydrophobicity and softness of leather, a fluoro-silicon-modified waterborne polyurethane (FSiWPU) leather finishing agent was prepared by emulsion polymerisation using 1H,1H,2H,2H-Nonafluoro-1-hexanol (F9) and N-(2-aminoethyl) -3-aminopropyl trimethoxy silane (KH-792) as modified monomers. The structure of the latex film and the film was characterised by FTIR, XRD and UV. The effects of F9 and KH-792 on the properties of the film was investigated. The water contact angle and application properties of the coated leather were tested. FTIR and XRD showed that F9 and KH-792 were successfully introduced into the main chain of waterborne polyurethane. The particle size of the modified composite emulsion was 106nm; the UV transmittance of the composite emulsion was significantly reduced compared to pure aqueous polyurethane. The water contact angle of the leather finished with the composite emulsion was 111° Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Preparation of fluorosilicone waterborne polyurethane emulsion - Finishing technology of leather - Fourier transform infrared spectra (FTIR) analysis - XRD analysis of emulsion - Particle size analysis of emulsion - UV analysis of emulsion - Contact angle of finished leather to water - Testing of the finished leather applied properties - RESULTS AND DISCUSSION : FTIR analysis - Emulsion particle size distribution test - Testing of the finished leather's applied performance - Table 1 : Application performance of the finished leather En ligne : https://drive.google.com/file/d/1d_WJZIXs1zK5qGap1DDngHkVOX0uhsbX/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38866 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
23893	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Recycle of magnesium alloy scrap for improving fire resistance, thermal stability, and water tolerance of intumescent fire-retardant coatings / Cheng Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 2 (03/2021)  

Permalink

---

1 (1 - 6 / 6)