Application of power ultrasound in leather processing: an eco-friendly approach

Sivakumar, V.; Rao, Paruchuri G.

doi:10.1016/s0959-6526(00)00028-7

Cited by 56 publications

(19 citation statements)

References 11 publications

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“…Free radicals may even be generated by the power ultrasound process [1]. Because many liquidprocessing and surface penetrations are involved in leather-making, the cavitation and additional effects of accelera procesul de prelucrare umedã în diferite grade [2][3]. Existã multe studii cu privire la aplicarea ultrasunetelor în operaþiuni precum înmuierea, degresarea, îndepãrtarea pãrului, cenuºãrirea, tãbãcirea, vopsirea, ungerea pielii, ºi chiar ºi în tratarea nãmolului rezultat în urma fabricãrii pielii.…”

Section: Introductionunclassified

“…? ºi grãsimilor, ºi nu induc modificãri evidente în structura fibrelor de colagen din piele bovinã [3].…”

Section: Introductionunclassified

“…power ultrasound may accelerate the process of wet manufacture to different degrees [2,3]. There are many studies on the application of power ultrasound in such fields as soaking, degreasing, de-hairing, liming, tanning, dyeing, fatliquoring, and even in the sewage sludge treatment of leather-making.…”

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confidence: 99%

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Effect of Ultrasound on the Dry Heat Behaviors of Cattlehide Collagen Fibers

Tang¹,

Tian²,

Fang³

et al. 2015

LFJ

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ABSTRACT. In this paper, the dry heat behaviors of different cattlehide collagen fiber samples with and without power ultrasound process are studied, and such instruments as Thermal Platform Microscope, Differential Scanning Calorimetry (DSC) and Thermogravimetry (TG) are employed in the study. It is indicated that the dry heat behavior of the samples is slightly decreased because of the power ultrasound process. The reason why it is the case may be that part of the crystalline structure in the samples is destroyed by the power ultrasound process. KEY WORDS: ultrasound, dry heat behavior, cattlehide collagen fibers, tanning, retanning INFLUENÞA ULTRASUNETELOR ASUPRA COMPORTAMENTULUI TERMIC ÎN STARE USCATÃ AL FIBRELOR DE COLAGEN DIN PIELEA BOVINÃABSTRACT. În aceastã lucrare s-a studiat comportamentul termic în stare uscatã al diferitelor probe de fibre de colagen din piele bovinã cu ºi fãrã tratament cu ultrasunete, utilizând instrumente precum microscopul cu platformã termicã, calorimetria cu scanare diferenþialã (DSC) ºi termogravimetria (TG). Rezultatele aratã cã comportamentul termic în stare uscatã al probelor scade uºor datoritã tratamentului cu ultrasunete. Motivul este acela cã o parte din structura cristalinã a probelor este distrusã prin tratamentul cu ultrasunete. CUVINTE CHEIE: ultrasunete, comportament termic în stare uscatã, fibre de colagen din piele bovinã, tãbãcire, retãbãcire L'INFLUENCE D'ULTRASONS SUR LE COMPORTEMENT THERMIQUE SEC DES FIBRES DE COLLAGÈNE DU CUIR BOVINRÉSUMÉ. Dans cet article on a étudié le comportement thermique sec de différents échantillons de fibres de collagène du cuir bovin avec et sans traitement par ultrasons, en utilisant des instruments tels que le microscope à plate-forme thermique, la calorimétrie différentielle à balayage (DSC) et la thermogravimétrie (TG). Les résultats ont indiqué que le comportement thermique sec des échantillons est légèrement diminué à cause du traitement par ultrasons. La raison est qu'une partie de la structure cristalline des échantillons est détruite par le traitement par ultrasons. MOTS CLÉS: ultrasons, comportement thermique sec, fibres de collagène du cuir bovin, tannage, retannage 257

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Section: Introductionunclassified

“…? ºi grãsimilor, ºi nu induc modificãri evidente în structura fibrelor de colagen din piele bovinã [3].…”

Section: Introductionunclassified

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Effect of Ultrasound on the Dry Heat Behaviors of Cattlehide Collagen Fibers

Tang¹,

Tian²,

Fang³

et al. 2015

LFJ

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“…Ultrasound is known to be a very effective and non-polluting method of activation in different industrial processes such as cleaning, homogenisation, emulsification, sieving, filtration, crystallisation, extraction, degassing and stripping [18], [22]. Ultrasonic sound waves radiate into solution in the form of a vertical wave.…”

Section: Introductionmentioning

confidence: 99%

Physicochemical Pretreatment of Contaminated Microfibre Cloths after Their Use in Waterless Car Wash / Ar virsmas aktīvām vielām piesārņotu bezūdens automašīnu tīrīšanas mikrošķiedru audumu fizikāli-ķīmiskā priekšapstrāde.

Strikauska¹,

Bērziņš²,

Arbidans³

et al. 2015

Materials Science and Applied Chemistry

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-Contaminated microfibre cloths (80 % polyester and 20 % polyamide) which were previously used in waterless car cleaning process were treated in ultrasonic bath. Efficiency of water, ethanol, 2-propanol and ethylene glycol as liquid phase for ultrasonic treatment was compared. Chemical oxygen demand (COD), concentration of surfactants and total nitrogen in the extract were tested after 0 min, 10 min, 30 min and 60 min ultrasonic (US) exposure (42 kHz). In all cases the COD values gradually increased in a time dependent manner from 6 % to 35 % with ethanol, from 17 % to 37 % with ethyleneglycol and from 17 % to 33 % with 2-propanol at 10 to 60 min US mode, respectively.

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“…Ultrasonic cleaning is a powerful technique to remove tough contaminants without damaging the substrate. It provides excellent penetration and cleaning in the narrowest crevices and between tightly spaced parts in a cleaning tank to remove unwanted particles from an object by exerting mechanical oscillations of high frequency Ultrasonic vibrations are also used in process industries such as leather, chemical, and textile to reduce process time, pollution load, and improvement in the product quality [3][4][5][6][7] . Ultrasonic vibration is considered as one of the methods for chemical synthesis (chemical reaction) and of yield enhancement of chemical engineering process for emulsification, degassing, crystallisation, extraction, etc [8][9][10][11] .…”

Section: Introductionmentioning

confidence: 99%

Computer-controlled Sophisticated Ultrasonic Cleaner

Muthurajan

2007

DSJ

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The significant advantage of ultrasonic cleaning technique is the abilities to clean the delicate and complex shape materials without damaging their surfaces quickly. Ultrasonic cleaners have found increasing applications in a variety of industries because these offer an environmentally good alternative to ozone-depleting compounds and hazardous solvents. Also, ultrasonic vibration is one of the methods for chemical synthesis (chemical reaction) and of yield enhancement of chemical engineering process. Consequently, there is a need to develop multipurpose ultrasonic cleaner/vibrator using computer control, which can be used to set the various performance parameter of ultrasonic vibrator such as frequency, duty cycle, continuous/ pulsed mode, duration of operation, and thermal profile of tank during the process. An ultrasonic cleaner was developed using an oscillator circuit and the duration of oscillator circuit functioning can be set through the computer. Computerised ultrasonic cleaner using indigenously made piezoceramic transducers and their advantages over the conventional ultrasonic cleaners are discussed.

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Application of power ultrasound in leather processing: an eco-friendly approach

Cited by 56 publications

References 11 publications

Effect of Ultrasound on the Dry Heat Behaviors of Cattlehide Collagen Fibers

Effect of Ultrasound on the Dry Heat Behaviors of Cattlehide Collagen Fibers

Physicochemical Pretreatment of Contaminated Microfibre Cloths after Their Use in Waterless Car Wash / Ar virsmas aktīvām vielām piesārņotu bezūdens automašīnu tīrīšanas mikrošķiedru audumu fizikāli-ķīmiskā priekšapstrāde.

Computer-controlled Sophisticated Ultrasonic Cleaner

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