Nanotechnology for Consumer Electronics

Gramling, Hannah M.; Kiziroglou, Michail E.; Yeatman, Eric M.

doi:10.1002/9783527800728.ch22

Cited by 2 publications

(2 citation statements)

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“…So-called engineered nanoparticles [1] are specifically manufactured particle systems that find a broad range of industrial applications due to their desirable properties [2]. Selected examples range from incorporation into electronic devices [3,4], use as a catalyst material [5][6][7], use in cancer therapy [8][9][10], to use in wastewater treatment [11][12][13]. Such applications place high demands on the particle systems: Properties such as particle size, surface, and shape are crucial for correct functionality and, therefore, require precise adjustment, which in turn makes selective separation steps during production a necessity.…”

Section: Introductionmentioning

confidence: 99%

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Multidimensional Separation by Magnetic Seeded Filtration: Experimental Studies

Rhein,

Zhai,

Schmid

et al. 2023

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The current state of separation technology often neglects the multidimensional nature of real particle systems, which are distributed not only in terms of size, but also in terms of other properties, such as surface charge. Therefore, the aim of this study is to experimentally investigate the applicability of magnetic seeded filtration as a multidimensional separation process. Magnetic seed particles are added to a multisubstance suspension, and a selective heteroagglomeration with the nonmagnetic target particles is induced, allowing for an easy subsequent magnetic separation. The results show that high separation efficiencies can be achieved and that the parameters pH and ionic strength govern the agglomeration process. Selective separation based on surface charge was observed, but undesirable heteroagglomeration processes between the target particles lead to a loss of selectivity. Particle size was clearly identified as a second relevant separation feature, and its partially opposite influence on collision frequency and collision efficiency was discussed. Finally, experimental data of multidimensional separation are presented, in which a size-distributed two-substance suspension is separated into defined size and material fractions in a single process step. This study highlights the need for multidimensional evaluation in general and the potential of magnetic seeded filtration as a promising separation technique.

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Section: Introductionmentioning

confidence: 99%

“…First, a selective heteroagglomeration is induced (1), and formed agglomerates are separated due to their newly acquired magnetic properties (2). Separated agglomerates may be broken up to recycle the magnetic component and gain access to the separated nonmagnetic particles (3).…”

Section: Introductionmentioning

confidence: 99%