A comparative study of ultrasonic degumming of silk sericin using citric acid, sodium carbonate and papain / Wuchao Wang in COLORATION TECHNOLOGY, Vol. 135, N° 3 (06/2019)  

[article]  inCOLORATION TECHNOLOGY > Vol. 135, N° 3 (06/2019) . - p. 195-201 Titre : A comparative study of ultrasonic degumming of silk sericin using citric acid, sodium carbonate and papain Type de document : texte imprimé Auteurs : Wuchao Wang, Auteur ; Yi Pan, Auteur ; Kang Gong, Auteur ; Qi Zhou, Auteur ; Tonghua Zhang, Auteur ; Qing Li, Auteur Année de publication : 2019 Article en page(s) : p. 195-201 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dégommage Essais dynamiques Fibres textiles -- Analyse Fibres textiles -- Propriétés mécaniques Morphologie (matériaux) Nettoyage par ultrasons Résistance à la traction Séricine Soie et constituants Surfaces -- Analyse Index. décimale : 667.3 Teinture et impression des tissus Résumé : The utilisation of ultrasonics has been shown to enable efficient and environmentally friendly textile wet processing. This study conducted a comparative investigation of silk degumming by using a conventional heating bath and ultrasonic irradiation at a range of ultrasonic frequencies. Citric acid, sodium carbonate and papain were used as degumming agents. Sericin degumming rate, fibre whiteness, fibre surface morphology, fibre structure characteristics and fibre tensile properties were measured and analysed. Results showed that ultrasonics at a lower frequency produced a greater degumming rate than at a higher frequency. Ultrasonics is a more effective way than the conventional heating bath of improving degumming efficiency, especially at a lowered temperature of 60 °C. When sodium carbonate was applied at 90 °C, a conventional heating bath was found to be more effective than ultrasonics. Papain was found to be more effective in sericin removal than citric acid and sodium carbonate, with a degumming rate of 22% achieved at 60 °C under ultrasonic irradiation at 40 kHz. The use of papain can, however, cause a possible overreaction to silk under certain severe conditions, resulting in a loss of fibre whiteness. Negligible changes in fibre structure characteristics were measured by Fourier Transform–infrared spectroscopy and X‐ray diffraction after ultrasonic degumming with papain. Slightly reduced fibre strength and increased fibre extensibility were observed in ultrasonically degummed silk samples compared with un‐degummed and conventionally degummed silk samples. Note de contenu : - EXPERIMENTAL : Materials - Equipment - Sample preparation - Degumming - Determination of fibre weight loss - Determination of fibre whiteness - Fibre surface analysis - Infrared spectra - X-ray diffraction - Tensil testing - RESULTS AND DISCUSSION : Degumming rate - Fibre whiteness - Fibre surface morphology - Fibre structure characteristics and tensile strength DOI : 10.1111/cote.12392 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12392 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32617 [article]

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Deburring and cleaning in a single process in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 13, N° 2 (2020)

[article]  inINTERNATIONAL SURFACE TECHNOLOGY (IST) > Vol. 13, N° 2 (2020) . - p. 30-31 Titre : Deburring and cleaning in a single process Type de document : texte imprimé Année de publication : 2020 Article en page(s) : p. 30-31 Langues : Anglais (eng) Catégories : Ebavurage Immersion Nettoyage par ultrasons Pièces usinées -- Nettoyage Index. décimale : 667.1 Nettoyage Résumé : Reliable deburring and cleaning are essential features of the manfuacturing process for high-quality, precision components. An immersion machine with multiple tanks has been designed for these stages of the production process where parts can undergo preliminary cleaning, deburring and precision cleaning using ultrasound in a single process. Note de contenu : - Ultrasound for deburring - A process for deburring metal and plastic - Fig. 1 : To meet the specifications for burr-free, sharp-edged parts, the company designed a combined machine for deburring and cleaning with ultrasound - Fig. 2 : During the deburring process, two knife sonotrodes approximately 60 mm in length move just above the parts which are rotating in the immersion tank Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34479 [article]

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Smart solution for efficient precision cleaning in ADHESION - ADHESIVES + SEALANTS, Vol. 17, N° 4/2020 (2020)  

[article]  inADHESION - ADHESIVES + SEALANTS > Vol. 17, N° 4/2020 (2020) . - p. 14-16 Titre : Smart solution for efficient precision cleaning Type de document : texte imprimé Année de publication : 2020 Article en page(s) : p. 14-16 Langues : Multilingue (mul) Catégories : Nettoyage industriel -- Appareils et matériels Nettoyage par ultrasons Pièces usinées -- Nettoyage Index. décimale : 668.3 Adhésifs et produits semblables Résumé : Increasing demands regarding parts cleanliness can often only be met with precision cleaning processes tailored to specific requirements. For such applications, UCM has developed the new, cost-efficient ultrasonic cleaning series UCMSmartLine. It is based on standardized modules which include electrical and control systems for various process steps. Note de contenu : - Optimum adaptability and extensibility for future-proof operations - Designed for maximum process reliability as standard - High flexibility through integrated electrical and control sysgtems - Convincing design with health, safety and environmental benefits - Fig. 1 : The modular concept of the UCMSmartLine allows the individual design of in-line ultrasonic immersion systems for a wide range of applications. The electrical and control technology in integrated in each module - Fig. 2 : Up to nine cleaning and rinsing steps can be integrated into the cleaning systems and variably equipped for use with single, dual and multi-frequency ultrasonics - Fig. 3 : The standard automatic transport systems has a servo drive for very gentle workpiece transport and part-specific lift-out for pre-drying parts as they leave the last tank - Fig. 4 : All wet-stage tanks of the system, which is entirely made from electropolished stainless steel, have a two-sided overflow which ensure the immediate removal of detached particles and other contaminants. This minimizes the risk of recontamination when the parts are moved. En ligne : https://drive.google.com/file/d/15s__I9k8SwaMxouf3VJE8-QgujL1acJ4/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35051 [article]

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Space-saving solution with high standards of cleanliness in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 6, N° 3 (2013)

[article]  inINTERNATIONAL SURFACE TECHNOLOGY (IST) > Vol. 6, N° 3 (2013) . - p. 36 Titre : Space-saving solution with high standards of cleanliness : Multi-frequency system for ultrasonic cleaning Type de document : texte imprimé Année de publication : 2013 Article en page(s) : p. 36 Langues : Anglais (eng) Catégories : Nettoyage -- Appareils et matériels Nettoyage par ultrasons Index. décimale : 667.9 Revêtements et enduits Résumé : Ultrasound systems with different frequencies are often used in the optics, precision engineering and electronics sectors and for precison cleaning in other areas. Multi-frequency systems keep the space needed by ultrasonic cleaning machines to a minimum. Note de contenu : - Ultrasonic frequency modified for specific parts - One generator for two or three frequencies - Less space needed for transducer systems Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22808 [article]

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Ultra-fine parts cleaning system with robotic loaders / Doris Schulz in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 11, N° 3 (2018)

[article]  inINTERNATIONAL SURFACE TECHNOLOGY (IST) > Vol. 11, N° 3 (2018) . - p. 30-31 Titre : Ultra-fine parts cleaning system with robotic loaders Type de document : texte imprimé Auteurs : Doris Schulz, Auteur Année de publication : 2018 Article en page(s) : p. 30-31 Langues : Anglais (eng) Catégories : Nettoyage -- Appareils et matériels Nettoyage par ultrasons Pièces usinées -- Nettoyage Robots industriels solvants Index. décimale : 667.9 Revêtements et enduits Résumé : High-quality cleaning, increased productivity and reliable processes were the key requirements for the end-to-end cleaning system installed by a leading manufacturer of machine tools. It consists of several solvent-based cleaning machines and one highly automated ultra-fine cleaning system. Note de contenu : - Fast and reliable removal of oil residues - Ultra-fine ultrasound cleaning ensures parts are ready for coating - Robots allow for unmanned operation - Figures : 1. The solvent-based cleaningsystem used to degrease the indexable inserts, which rangi in size from 5 to 50 mm, following a grinding operation with oil has two flood tanks with separate filter circuits and a cleaning chamber that is 10 centimetres longer than normal - 2. The parts are handled by a robot to allow for unmanned operation - 3. The new ultra-fine cleaning machine not only results in cleaner parts, but also allows the use of chemicals and the staffing levels to be reduced Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31597 [article]

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