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The adsorption performance of Vat Scarlet R on natural superfine needle down particles / Fengxiang Chen in COLORATION TECHNOLOGY, Vol. 132, N° 1 (02/2016)
[article]
Titre : The adsorption performance of Vat Scarlet R on natural superfine needle down particles Type de document : texte imprimé Auteurs : Fengxiang Chen, Auteur ; Xin Liu, Auteur ; Keshuai Liu, Auteur ; Xinfang Xiao, Auteur ; Chunhua Zhang, Auteur ; Fan Cheng, Auteur ; Liangjun Xia, Auteur ; Yinshan Zhou, Auteur ; Binghai Dong, Auteur ; Li Wan, Auteur ; Shimin Wang, Auteur ; Weilin Xu, Auteur Année de publication : 2016 Article en page(s) : p. 28-34 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbants et adsorbants
Colorants -- Adsorption
Eaux usées -- Epuration
Isotherme d'adsorption
pHIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Natural superfine needle down particles were successfully prepared on a self-made machine and applied to remove hazardous dye Vat Scarlet R from aqueous solution. The adsorbent was characterised by scanning electron microscopy and Fourier transform infrared spectroscopy. The effects of contact time, pH, adsorbent dosage, initial dye concentration, and temperature on dye adsorption on natural superfine needle down particles were discussed. Equilibrium adsorption studies revealed that the Langmuir isotherm model gave the best fit to experimental data, which indicates monolayer adsorption on a homogeneous surface. The monolayer adsorption capacity increased with increasing temperature in the range 298–318 K for Vat Scarlet R adsorption, and the maximum obtained adsorption capacity was 76.823 mg g−1 at 318 K. The present study suggested that natural superfine needle down particles could be used as a good and cheaper adsorbent for dye effluent treatment. Note de contenu : - MATERIALS AND METHODS : - Materials - Preparation of natural superfine needle down particles - Characterisation of natural superfine needle down particles - Adsorption experiments
- RESULTS AND DISCUSSION : - Adsorbent characterisation - Effect of adsorption time - Effect of pH - Effect of adsorbent dose - Effect of initial dye concentration - Effect of temperature - Adsorption isothermsDOI : 10.1111/cote.12194 En ligne : http://onlinelibrary.wiley.com/doi/10.1111/cote.12194/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25576
in COLORATION TECHNOLOGY > Vol. 132, N° 1 (02/2016) . - p. 28-34[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17865 - Périodique Bibliothèque principale Documentaires Disponible The influence of relative humidity on the level of Cr(VI) in level of Cr(VI) in chrome-tanned leather / Yu Congzheng in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 5 (09-10/2005)
[article]
Titre : The influence of relative humidity on the level of Cr(VI) in level of Cr(VI) in chrome-tanned leather Type de document : texte imprimé Auteurs : Yu Congzheng, Auteur ; Liu Pengjie, Auteur ; Sun Genxing, Auteur ; Duan Liming, Auteur ; Ren Huijun, Auteur Année de publication : 2005 Article en page(s) : p. 194-198 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Air -- Humidité
Cuir -- Teneur en chrome hexavalent
Cuirs et peaux -- Analyse
pHIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The influence of relative humidity of the environment on the level of Cr(VI) in chrome-tanned leather was studied. The experiments were carried out as follows : a leather sample was cut into pieces which were stored in different relative humidities followed by determination of Cr(VI). Subsequently, these same pieces were stored at different relative humidities followed by re-determination of the Cr(VI) levels. To confirm the influence of relative humidity, pieces of leather soaked in dichromate solution were dried and then subjected to similar treatment as was given to the earlier leather samples. The results showed that there is a close relationship between the stored humidity and Cr(VI) levels in leather. The higher the relative humidity, the lower the level of Cr(VI) and vice versa. Note de contenu : - EXPERIMENTAL PROCEDURE : Experimental scheme - Determination of the iodine value of the fatliquor (GB5532-85) - Determination of Cr(VI) level in leather according to IU C- 18 standard of the IULTCS - comparing influences of pH value and humidity on chrome (VI) level in leather - Influence of different humidities on the Cr(VI) content in leather - Influence of humidity reversed adjustment on Cr(VI) content in leather - Intensifying treatment of leather samples
- RESULTS AND DISCUSSION : Determination of the iodine value of different fatliquors and the corresponding Cr(VI) contents in leather - Determination of pH values of the stored leathers in different humidities - Cr(VI) content in leather stored at different humidity - Influence of humidity reversed adjustment on Cr(VI) content in leather - Intensifying experiment on different humidity of leathers and different Cr(VI) solutionsEn ligne : https://drive.google.com/file/d/1LnO09Mpg3he-RIIhOwtrlOmyIWRBMVux/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39229
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 89, N° 5 (09-10/2005) . - p. 194-198[article]The swelling of pelt at neutral pH as a result of the conditions of the previous pickle / M. Portavella in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 60 (Année 1976)
[article]
Titre : The swelling of pelt at neutral pH as a result of the conditions of the previous pickle Type de document : texte imprimé Auteurs : M. Portavella, Auteur ; M. Soldevila, Auteur Année de publication : 1976 Article en page(s) : p. 37-45 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux de moutons
Gonflement (physique)
Matériaux -- Epaisseur
pH
PicklageLe picklage consiste à faire absorber à la peau en tripe une quantité importante d'acide, en présence de sel neutre (NaCl) pour réprimer le gonflement que provoquerait l'acidité du milieu.
Température de retrait
Volumétrie (chimie analytique)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Tanners who process pickled sheepskins which have benn stored for a long time have probaly noticed taht sometimes the pelts are liable to swell a great deal after having been returned to the pelts state (for example, after being depickled to pH 7, and thoroughly washed).
The published literature covering the deterioration produced on the skin by the preserving pickle does not refer to this swelling. There are many papers which deal with the attacks of acids (without salt) on collagen, and others which treat the acid pretreatment of collagen in order to obtain gelatin. Some of them mention that this king of acidic attack has also been observed in the presence of common salt, with the consequent swelling at neutral pH. The conditions which produce this swelling have not been studied systematically as yet.
In this paper, variations of both swelling at neutral pH and the shrinkage temperature of the pelts (Spanish sheepskins after a conventional beamhouse process) are investigated as a result of the conditions of the previous pickle (NaCl in the bath: 6 and 12°/Bé; H2SO4: 1.3 and 9% on pelt weight; temp.: 20 and 40°C and time 0, 1, 6, 8 and 34 days).
It has been found that both the degree of swelling and the decrease of shrinkage temperature depend on the conditions of the previous pickle. Both increase when the pickle action has been more intense.
Furthermore, the effects of the acidic attack produced by a strong pickle are studied specifically on: (a) variations in the percentage of swelling and shrinkage temperature at different pH values; (b) titration curves; (c) the amount of chrome taken up by the skin in a conventional tanning; and (d) physical tests of the leather obtained, measured in the Lastrometer.
Accordind to the results, and relating them to the fidings of other authors, some theoretical aspects of the possible causes of this swelling are discussed.
In conclusion, a simple method to assist the sheepskin tanner is presented. This method aids in establishing the degree of deterioration of the skins caused by the combined action of the beamhouse process and the preserving pickle. The method does not require specialised personnel or instrumments.Note de contenu : - Fig. 1 : Precentage of swelling at neutral pH as a function of pickle and storage conditions
- Fig. 2 : Shrinkage temperature of pelts as a function of pickle and storage conditions
- Fig. 3 : Precentage of swelling at different pH values
- Fig. 4 : Shrinkage temperature as a function of pH. Measurements in Na2SO4 (13° Bé°) solution
- Fig. 5 : Titrage curves
- Table 1 : Swelling precentage and shrinkage temperature of pelts as a function of pickle and storage conditions
- Table 2 : Swelling precentage as a function of pH
- Table 3 : Shrinkage temperature as a function of pH
- Table 4 : Titrage curves data
- Table 5 : Shrinkage temperature and ash precentage oh the chrome tanned leathers
- Table 6 : Thickness and physical strenght (Lastometer)En ligne : https://drive.google.com/file/d/1kVXgbu949t9Aq3hCSuO5dLUzBroZN8OU/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31801
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 60 (Année 1976) . - p. 37-45[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008596 - Périodique Archives Documentaires Exclu du prêt The swelling of pelt at neutral pH as a result of the conditions of the previous pickle / M. Portavella in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 60, N° 2 (03-04/1976)
[article]
Titre : The swelling of pelt at neutral pH as a result of the conditions of the previous pickle Type de document : texte imprimé Auteurs : M. Portavella, Auteur ; M. Soldevila, Auteur Année de publication : 1976 Article en page(s) : p. 37-45 Langues : Anglais (eng) Catégories : Cuirs et peaux de moutons
Gonflement (physique)
Matériaux -- Epaisseur
pH
PicklageLe picklage consiste à faire absorber à la peau en tripe une quantité importante d'acide, en présence de sel neutre (NaCl) pour réprimer le gonflement que provoquerait l'acidité du milieu.
Température de retrait
Volumétrie (chimie analytique)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Tanners who process pickled sheepskins which have benn stored for a long time have probaly noticed taht sometimes the pelts are liable to swell a great deal after having been returned to the pelts state (for example, after being depickled to pH 7, and thoroughly washed).
The published literature covering the deterioration produced on the skin by the preserving pickle does not refer to this swelling. There are many papers which deal with the attacks of acids (without salt) on collagen, and others which treat the acid pretreatment of collagen in order to obtain gelatin. Some of them mention that this king of acidic attack has also been observed in the presence of common salt, with the consequent swelling at neutral pH. The conditions which produce this swelling have not been studied systematically as yet.
In this paper, variations of both swelling at neutral pH and the shrinkage temperature of the pelts (Spanish sheepskins after a conventional beamhouse process) are investigated as a result of the conditions of the previous pickle (NaCl in the bath: 6 and 12°/Bé; H2SO4: 1.3 and 9% on pelt weight; temp.: 20 and 40°C and time 0, 1, 6, 8 and 34 days).
It has been found that both the degree of swelling and the decrease of shrinkage temperature depend on the conditions of the previous pickle. Both increase when the pickle action has been more intense.
Furthermore, the effects of the acidic attack produced by a strong pickle are studied specifically on: (a) variations in the percentage of swelling and shrinkage temperature at different pH values; (b) titration curves; (c) the amount of chrome taken up by the skin in a conventional tanning; and (d) physical tests of the leather obtained, measured in the Lastrometer.
Accordind to the results, and relating them to the fidings of other authors, some theoretical aspects of the possible causes of this swelling are discussed.
In conclusion, a simple method to assist the sheepskin tanner is presented. This method aids in establishing the degree of deterioration of the skins caused by the combined action of the beamhouse process and the preserving pickle. The method does not require specialised personnel or instrumments.Note de contenu : - Fig. 1 : Precentage of swelling at neutral pH as a function of pickle and storage conditions
- Fig. 2 : Shrinkage temperature of pelts as a function of pickle and storage conditions
- Fig. 3 : Precentage of swelling at different pH values
- Fig. 4 : Shrinkage temperature as a function of pH. Measurements in Na2SO4 (13° Bé°) solution
- Fig. 5 : Titrage curves
- Table 1 : Swelling precentage and shrinkage temperature of pelts as a function of pickle and storage conditions
- Table 2 : Swelling precentage as a function of pH
- Table 3 : Shrinkage temperature as a function of pH
- Table 4 : Titrage curves data
- Table 5 : Shrinkage temperature and ash precentage oh the chrome tanned leathers
- Table 6 : Thickness and physical strenght (Lastometer)En ligne : https://drive.google.com/file/d/1kVXgbu949t9Aq3hCSuO5dLUzBroZN8OU/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31866
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 60, N° 2 (03-04/1976) . - p. 37-45[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007105 - Périodique Bibliothèque principale Documentaires Disponible TiO2 efficiency in coatings : products and techniques for opacity optimisation in PAINTINDIA, Vol. LXVII, N° 5 (05/2017)
[article]
Titre : TiO2 efficiency in coatings : products and techniques for opacity optimisation Type de document : texte imprimé Année de publication : 2017 Article en page(s) : p. 76-88 Langues : Anglais (eng) Catégories : Agents dispersants (chimie)
Dioxyde de titane
Dispersions et suspensions
Opacité (optique)
pH
Revêtement en phase solvant:Peinture en phase solvant
Revêtements en phase aqueuse:Peinture en phase aqueuseIndex. décimale : 667.2 Colorants et pigments Résumé : For those who have been in the Coatings industry for long enough, the rollercoaster ride of TiO2 price comes as no surprise. That said, the days of an even 10-year cycle in price have changed to shorter periods of high price (often painfully high) followed by longer periods of relatively low price (painful for the suppliers). Even when relatively "cheap", TiO, continues to be one of the most expensive raw materials in a coating and so ensuring that the pigment you buy is used correctly and efficiently remains a crucial business objective. Note de contenu : - TiO2 selection
- Pigment dispersion
- Solvent systems
- Water-based systems
- The role of pH and surface charge
- Dispersants and dispersant requirements
- Physical dispersion
- Pigment crowding and spacing
- Cost effective opacity
- Engineered composite technology - FP-pigment "opacity pigment"En ligne : https://drive.google.com/file/d/1jj19-Tjh-qx8uoIt1WgLXgMjEY7PLaor/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28874
in PAINTINDIA > Vol. LXVII, N° 5 (05/2017) . - p. 76-88[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19144 - Périodique Bibliothèque principale Documentaires Disponible Traitements easy-care sur laine / Francis Carlier in L'INDUSTRIE TEXTILE, N° 1344/45 (09-10/2002)
PermalinkUtilizing Taguchi design of experiment to study the surface treatment of a nanosilica with an acrylic silane coupling agent and revealing the dispersibility of particles in a urethane acrylate resin / Y. Zamani Ketek Lahijani in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)
PermalinkViscosity properties of collagen solutions : influence of pH, salt type and salt concentration / Kai Lei in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 3 (05-06/2018)
PermalinkWater-compatible, pH-sensitive, colour-changing polyurethane with low-temperature flexibility / Yong-Chan Chung in COLORATION TECHNOLOGY, Vol. 133, N° 3 (06/2017)
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