Effect of stressing conditions on mechanochemical Knoevenagel synthesis

Burmeister, Christine; Schmidt, Robert R.; Jacob, Katharina; Breitung‐Faes, Sandra; Stolle, Achim; Kwade, Arno

doi:10.1016/j.cej.2020.124578

Cited by 16 publications

(32 citation statements)

References 28 publications

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“…The values of stressing energy and collision frequency [ 34–37 ] are accessible via simulations based on the discrete‐element‐method (DEM). [ 38 ] However, the total power P total (Equation (3)) can also directly be determined by the rotational speed n SUN of the sun wheel ( Figure 2 a) and the torque M , which is experimentally measured by a torque sensor or extracted from the respective DEM simulation [ 34 ]

\begin{matrix} P_{total} = 2 π \cdot n_{SUN} \cdot M \end{matrix}

…”

Section: Processing Considerations Using Mechanical Millingmentioning

confidence: 99%

“…Considering the stressing energy, a distinction needs to be made between normal fractions transferred by head‐on collisions and total dissipation of the entire collision. With the total power input and the collision frequency a mean value for the total energy dissipation

{\overset{SE}{true}}_{total}

(Equation (4)) can be obtained [ 36 ]

\begin{matrix} {\overset{SE}{true}}_{total} = \frac{P_{total}}{CF} \end{matrix}

…”

Section: Processing Considerations Using Mechanical Millingmentioning

confidence: 99%

“…The layer formation and flowability of particles affect the active mass ( m A ) of particles that are stressed within a collision. By that, also the stressing intensity SI (Equation (6)), i.e., the ratio of stressing energy to active mass as specific energy available per particle, is affected as each particle does only receive a part of the dissipated energy [ 34,36,51–54 ]

\begin{matrix} SI = \frac{SE}{m_{A}} \end{matrix}

…”

Section: Processing Considerations Using Mechanical Millingmentioning

confidence: 99%

Section: Processing Considerations Using Mechanical Millingmentioning

confidence: 99%

“…The above mentioned stressing conditions have been described for several milling types, [ 34,36,55 ] and can even be modeled by simulations using discrete element methods. [ 34–37 ] An indication for the values of the stressing energy and the collision frequency as mill related characteristic parameters for the different ball mills is given in Table 1. As the product of collision frequency and stressing energy is a measure for the power input of a certain mill, a tumbling ball mill has the lowest power density (power input per mill volume) followed by the vibrating mill.…”

Section: Processing Considerations Using Mechanical Millingmentioning

confidence: 99%

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Energy Storage Materials for Solid‐State Batteries: Design by Mechanochemistry

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et al. 2021

Advanced Energy Materials

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Commercialization of solid‐state batteries requires the upscaling of the material syntheses as well as the mixing of electrode composites containing the solid electrolyte, cathode active materials, binders, and conductive additives. Inspired by recent literature about the tremendous influence of the employed milling and dispersing procedure on the resulting ionic transport properties of solid ionic conductors and the general performance of all solid‐state batteries, in this review, the underlying physical and mechanochemical processes that influence this processing are discussed. By discussing and combining the theoretical backgrounds of mechanical milling with regard to mechanochemical synthesis and dispersing of particles together with a wide range of examples, a better understanding of the critical parameters attached to mechanical milling of solid electrolytes and solid‐state battery components is provided.

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\begin{matrix} P_{total} = 2 π \cdot n_{SUN} \cdot M \end{matrix}

…”

Section: Processing Considerations Using Mechanical Millingmentioning

confidence: 99%

{\overset{SE}{true}}_{total}

(Equation (4)) can be obtained [ 36 ]

\begin{matrix} {\overset{SE}{true}}_{total} = \frac{P_{total}}{CF} \end{matrix}

…”

Section: Processing Considerations Using Mechanical Millingmentioning

confidence: 99%

\begin{matrix} SI = \frac{SE}{m_{A}} \end{matrix}

…”

Section: Processing Considerations Using Mechanical Millingmentioning

confidence: 99%

Section: Processing Considerations Using Mechanical Millingmentioning

confidence: 99%

Section: Processing Considerations Using Mechanical Millingmentioning

confidence: 99%

See 3 more Smart Citations

Energy Storage Materials for Solid‐State Batteries: Design by Mechanochemistry

Schlem

Burmeister

Michalowski

et al. 2021

Advanced Energy Materials

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Mechanochemical C−X/C−H Functionalization: An Alternative Strategic Access to Pharmaceuticals

Yang

et al. 2022

Eur J Org Chem

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In the pursuit of clean pharmaceutical production, chemists in medicinal industry require access to new sustainable methodologies to reduce and even eliminate pollution, which is mainly produced by the overuse of organic solvents during chemical synthesis of active pharmaceutical ingredients (APIs). In this context, the solvent-free/less mechanochemical functionalization of small molecules has gradually emerged as a powerful strategy for the green synthesis and modification of APIs, bioactive compounds, and functional materials. In this review, we present an overview of mechanochemical CÀ X/CÀ H functionalization applications to medicinal chemistry, involving cross-coupling, cross-dehydrogenative coupling, oxidative coupling (via CÀ H activation pathway), and direct coupling (via radical pathway) as key steps for the preparation of APIs and bioactive compounds.

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Mechanochemistry: A Power Tool for Green Synthesis

Özer

2021

Advances in Science, Technology &Amp; Innovation

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Effect of stressing conditions on mechanochemical Knoevenagel synthesis

Cited by 16 publications

References 28 publications

Energy Storage Materials for Solid‐State Batteries: Design by Mechanochemistry

Energy Storage Materials for Solid‐State Batteries: Design by Mechanochemistry

Mechanochemical C−X/C−H Functionalization: An Alternative Strategic Access to Pharmaceuticals

Mechanochemistry: A Power Tool for Green Synthesis

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