Foam breaking by high speed rotors

Furchner, Bodo; Mersmann, Alfons

doi:10.1002/ceat.270130112

Cited by 15 publications

(1 citation statement)

References 10 publications

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“…The mechanical grinding is typically accomplished in the dry state of the material using mortar and pestle, ballmilling, or air jet-milling. [32] The toner materials are mixed in a melt phase, cooled, and broken down in the grinding device. This setup is advantageous for the simplicity and often lower cost, but produces irregularly shaped particles with a wide size distribution.…”

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Laser‐Printed Organic Thin‐Film Transistors

Diemer¹,

Harper²,

Niazi³

et al. 2019

Adv Materials Technologies

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Solution deposition of organic opto-electronic materials enables fast roll-to-roll manufacturing of photonic and electronic devices on any type of substrate and at low cost. But controlling the film microstructure when it crystallizes from solution can be challenging. This represents a major limitation of this technology, since the microstructure, in turn, governs the charge transport properties of the material. Further, the solvents typically used are hazardous, which precludes their incorporation in large-scale manufacturing processes. Here, we report the first ever organic thin-film transistor fabricated with an electrophotographic laser printing process using a standard office laser printer. This completely solvent-free additive manufacturing method allows for simultaneous deposition, purification, and patterning of the organic semiconductor layer. Laser printed transistors using triisopropylsilylethynyl pentacene as the semiconductor layer were realized on flexible substrates and characterized, making this a successful first demonstration of the potential of laser printing of organic semiconductors.

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mentioning

confidence: 99%

Laser‐Printed Organic Thin‐Film Transistors

Diemer¹,

Harper²,

Niazi³

et al. 2019

Adv Materials Technologies

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Performance characteristics of novel mechanical foam breakers in a stirred tank reactor

Deshpande

Barigou

1999

J. Chem. Technol. Biotechnol.

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Unlimited foam formation and insuf®cient foam collapse can have serious effects in an aerated system such as a fermentation process. Mechanical foam breakers are used in foam control to avoid the drawbacks associated with the use of chemical antifoams and defoaming agents. In this paper, two new foam breakers consisting of a two-blade paddle with three slits, and a two-blade paddle with 168 thin needles have been tested. They gave signi®cantly reduced critical speeds and power consumption for foam control in a stirred vessel, compared with some conventional foam breakers. The effects of various parameters, namely the physical properties of the foaming solution, type of gas sparger, surfactant concentration, and foam-breaker clearance above liquid level, have been investigated. The degree of dif®culty of controlling dynamic foams generated continuously in a stirred vessel is found to be a function of the nature of the foam, ie its bubble size, its liquid holdup, and the degree of foamability of the system.

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2001

Stirring

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Foam breaking by high speed rotors

Cited by 15 publications

References 10 publications

Laser‐Printed Organic Thin‐Film Transistors

Laser‐Printed Organic Thin‐Film Transistors

Performance characteristics of novel mechanical foam breakers in a stirred tank reactor

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