107 results match your criteria: "Institute for Particle Technology[Affiliation]"

While the effects of new solid electrolytes and active materials in cathode composites for solid-state batteries are being intensively researched, little is known about the influence of mechanical processing on the properties of these composites. Here, the influence of mechanical process parameters on the production of LiPSCl and LiNiCoMnO composite cathodes applying a planetary ball milling process is systematically investigated. It is shown that the milling process has a significant influence on the microstructure of the composite by affecting the solid electrolyte particle size and the formation of electrolyte-active material aggregates.

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The number of newly developed substances with poor water solubility continually increases. Therefore, specialized formulation strategies are required to overcome the low bioavailability often associated with this property. This review provides an overview of novel physical modification strategies discussed in the literature over the past decades and focuses on oral dosage forms.

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Nanoporous structures made from nickel-based superalloy are fairly new and not thoroughly studied membrane materials for premix membrane emulsification. They show a different kind of pore structure than other membranes typically used in this process with a network of elongated, interconnected pores (150-400 nm). Two different membrane structures, resulting from different creep strains, times and temperatures during production, were investigated for their performance in premix membrane emulsification.

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Superparamagnetic iron oxide nanoparticles (SPIONs) with tailored surface modifications were employed to fabricate ordered thin films through a drop-casting technique. By systematically varying the ligand chain length using stearic acid, decanoic acid, and hexanoic acid, we precisely controlled the interparticle distances within the films. Comprehensive investigations utilizing superconducting quantum interference device (SQUID) magnetometry elucidated the films' superparamagnetic behaviour at room temperature, as well as notable exchange interactions at lower temperatures.

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The provision of effective probiotic formulations requires gentle processing to maintain the viability of the probiotic microorganisms, which is essential for their health-promoting effects. The drying of microorganisms by fluidized bed spray granulation and subsequent processing of the granules into tablets has proven to be a promising process route in previous studies of the same authors. In these, the influence of various factors was considered using cylindrical tablets with a diameter of 11.

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The growing demand for advanced energy storage systems requires the development of next-generation battery technologies with superior energy density and cycle stability, with lithium-sulfur (Li-S) batteries representing a promising solution. Sulfur-containing polyacrylonitrile cathodes (SPAN) for Li-S batteries are a significant advancement for this next-generation battery chemistry, addressing the major issue of limited cycle life encountered in conventional carbon/sulfur composite cathodes. In the presented study, the influence of available ionic and electronic conduction pathways within the cathode on the electrochemical performance of SPAN-based Li-S batteries is studied in details.

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Influence of multiple compression phases during tableting of spray dried Saccharomyces cerevisiae on microbial survival and physical-mechanical tablet properties.

Int J Pharm

December 2024

Institute for Particle Technology (iPAT), Technische Universität Braunschweig, Volkmaroder Straße 5, Braunschweig 38104, Germany; Center of Pharmaceutical Engineering (PVZ), Technische Universität Braunschweig, Franz-Liszt-Straße 35A, Braunschweig 38106, Germany.

Article Synopsis
  • The survival of probiotic microorganisms like Saccharomyces cerevisiae is crucial for their health benefits, necessitating careful handling during production, particularly in drying and tableting processes.* -
  • Previous research identified protective additives for spray-drying and explored the effects of tablet formulation, but there was little focus on the impact of multiple compressions during the tableting process.* -
  • The study found that compressing tablets up to five times does not significantly change tablet strength or microorganism survival, suggesting that earlier findings from single compression studies are applicable, and that the inactivation of probiotics during tableting is linked to porosity reduction rather than compression methods.*
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Article Synopsis
  • The research explores how adhesion forces among submicron particles affect processes like agglomeration, focusing on factors like particle size and surface roughness.
  • Experiments were conducted using colloidal probe atomic force microscopy (cp-AFM) to measure adhesive forces in silica and polystyrene, while surface energies were assessed through the capillary rise method.
  • Findings reveal a relationship between measured adhesion forces and surface energy using various models, identifying substrate and particle roughness, as well as material behavior, as key factors impacting adhesion.
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Cost modeling for the GWh-scale production of modern lithium-ion battery cells.

Commun Eng

November 2024

Institute for Particle Technology & Battery LabFactory, Technical University Braunschweig, Volkmaroder Straße 5, 38104, Braunschweig, Germany.

Article Synopsis
  • Battery production cost models help evaluate the competitiveness of various battery designs and manufacturing methods.
  • We introduce a bottom-up approach to calculate different cost types for battery production, making it easier to compare across industries and research fields.
  • Our publicly available tool uses current data to assess production costs, aiming to support advancements in electrified mobility by finding ways to lower these costs.
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The search for a synthesis method to create longer ZnO NWAs with high-quality vertical alignment, and the investigation of their electrical properties, have become increasingly important. In this study, a hydrothermal method for growing vertically aligned arrays of ZnO nanowires (NWs) using localized heating was utilized. To produce longer NWs, the temperature environment of the growth system was optimized with a novel reaction container that provided improved thermal insulation.

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The controlled synthesis of nanoparticles with tailored shapes and morphologies has garnered significant attention, driven by the ever-growing demand for advanced materials with defined properties. In nanoparticle formation, various parameters influence the final product, and among these, the solvent plays a pivotal role, as it constitutes the major component of the reaction medium. In this work, the critical role of solvents in controlling the growth of zinc oxide (ZnO) nanoparticles was investigated, with a focus on simple primary alcoholic solvents as the reaction medium.

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Enhancing chemotherapeutic efficacy: Niosome-encapsulated Dox-Cis with MUC-1 aptamer.

Cancer Med

August 2024

Central Research Test and Analysis Laboratory Application and Research Center, Ege University, Izmir, Turkey.

Background: Cancer remains a formidable global health challenge, currently affecting nearly 20 million individuals worldwide. Due to the absence of universally effective treatments, ongoing research explores diverse strategies to combat this disease. Recent efforts have concentrated on developing combined drug regimens and targeted therapeutic approaches.

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Future industrial applications of microparticle fractionation with deterministic lateral displacement (DLD) devices are hindered by exceedingly low throughput rates. To enable the necessary high-volume flows, high flow velocities as well as high aspect ratios in DLD devices have to be investigated. However, no experimental studies have yet been conducted on the fractionation of bi-disperse suspensions containing particles below 10 µm with DLD at a Reynolds number (Re) above 60.

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Effect of particle size on the dispersion behavior of magnesium stearate blended with microcrystalline cellulose.

Int J Pharm

February 2024

Institute for Particle Technology, Technische Universität Braunschweig, Volkmaroder Straße 5, 38104 Braunschweig, Germany; Center of Pharmaceutical Engineering (PVZ), Technische Universität Braunschweig, Franz-Liszt-Straße 35A, 38106 Braunschweig, Germany.

The majority of tablets manufactured contain lubricants to reduce friction during ejection. However, especially for plastically deforming materials, e.g.

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Introduction: Tablets are commonly produced by internally adding particulate lubricants, which are known to possibly lower the mechanical strength of tablets. This reduction is caused by the coverage of matrix forming components by lubricant particles, resulting in decreased interparticulate interactions. The known incompatibilities with some active compounds of the predominantly used lubricant, magnesium stearate, call for the in-depth characterization of alternative lubricants.

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Smart Iterative Analysis Tool for the Size Distribution of Spherical Nanoparticles.

Microsc Microanal

June 2023

Physikalisch-Technische Bundesanstalt, Bundesallee 100, Braunschweig 38116, Germany.

The size of nanoparticles is a critical parameter with regard to their performance. Therefore, precise measurement of the size distribution is often required. While electron microscopy (EM) is a useful tool to image large numbers of particles at once, manual analysis of individual particles in EM images is a time-consuming and labor-intensive task.

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In biotechnological processes, filamentous microorganisms are known for their broad product spectrum and complex cellular morphology. Product formation and cellular morphology are often closely linked, requiring a well-defined level of mechanical stress to achieve high product concentrations. Macroparticles were added to shake flask cultures of the filamentous actinomycete to find these optimal cultivation conditions.

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Temperature influence on the compression and breakage behaviour of yeast cells.

Lett Appl Microbiol

August 2023

Institute for Particle Technology, Technische Universität Braunschweig, Volkmaroder Straße 5, D-38104 Braunschweig, Germany.

Article Synopsis
  • Industrial biotechnology utilizes microbial cells, like yeast, to create various products, but their mechanical properties are less understood compared to their genetic properties.
  • A test procedure using nanoindentation measures the compressive response of single yeast cells (Saccharomyces cerevisiae), helping determine important characteristics like burst force and burst energy.
  • Recent findings illustrate that temperature affects yeast cell strength, with increased temperatures up to 35°C reducing strength, while temperatures up to 50°C significantly enhance burst force and energy, aiding in optimizing conditions for biotechnological processes.
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Article Synopsis
  • Understanding the generation and effects of thermomechanical stress during small-scale melt-extrusion is essential for ensuring the stability of protein particles like lysozyme and BSA in PEG matrices.
  • The study compared both experimental and numerical methods to analyze how different extrusion designs impact protein stability, finding that continuous screw extrusion (TSE) leads to more protein degradation compared to ram extrusion.
  • Results indicated that ram extrusion caused less damage to protein stability, making it the preferred method for producing stable protein-loaded extrudates in small-scale applications.
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Process and formulation parameters influencing the survival of Saccharomyces cerevisiae during spray drying and tableting.

Int J Pharm

July 2023

Institute for Particle Technology (iPAT), Technische Universität Braunschweig, Volkmaroder Straße 5, 38104 Braunschweig, Germany; Center of Pharmaceutical Engineering (PVZ), Technische Universität Braunschweig, Franz-Liszt-Straße 35A, 38106 Braunschweig, Germany. Electronic address: i.kampen@tu-

Probiotic microorganisms provide health benefits to the patient when administered in a viable form and in sufficient doses. To ensure this, dry dosage forms are preferred, with tablets in particular being favored due to several advantages. However, the microorganisms must first be dried as gently as possible.

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Influence of compression kinetics during tableting of fluidized bed-granulated microorganisms on microbiological and physical-mechanical tablet properties.

Eur J Pharm Biopharm

July 2023

Technische Universität Braunschweig, Institute for Particle Technology, Volkmaroder Straße 5, 38104 Braunschweig, Germany; Technische Universität Braunschweig, Center of Pharmaceutical Engineering (PVZ), Franz-Liszt-Straße 35A, 38106 Braunschweig, Germany.

Article Synopsis
  • * Granules containing yeast were compressed in a simulator, with experiments varying compression stress, speed, and dwell time to analyze impacts on tablet quality and microbial survival.
  • * Higher compression stresses and longer dwell times decreased tablet porosity and microbial survival, but also increased tensile strength, indicating that fast production speeds can be maintained without compromising viability as long as tensile strength remains consistent.
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Indium tin oxide (ITO) aerogels offer a combination of high surface area, porosity and conductive properties and could therefore be a promising material for electrodes in the fields of batteries, solar cells and fuel cells, as well as for optoelectronic applications. In this study, ITO aerogels were synthesized via two different approaches, followed by critical point drying (CPD) with liquid CO. During the nonaqueous one-pot sol-gel synthesis in benzylamine (BnNH), the ITO nanoparticles arranged to form a gel, which could be directly processed into an aerogel via solvent exchange, followed by CPD.

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, as an actinomycete, is a natural producer of the antibiotic and antitumoral drug rebeccamycin. Due to the filamentous cellular morphology handling in cultivations is challenging; therefore, morphology engineering techniques are mandatory to enhance productivity. One promising approach described in the literature is the addition of mineral particles in the micrometer range to precisely adjust cellular morphology and the corresponding product synthesis (microparticle-enhanced cultivation, MPEC).

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Tableting of fluidized bed granules containing living microorganisms.

Eur J Pharm Biopharm

June 2023

Technische Universität Braunschweig, Institute for Particle Technology, Volkmaroder Straße 5, 38104 Braunschweig, Germany; Technische Universität Braunschweig, Center of Pharmaceutical Engineering (PVZ), Franz-Liszt-Straße 35A, 38106 Braunschweig, Germany.

Tablets are the favored dosage form for numerous active pharmaceutical ingredients, among others because they are easy to take, ensure safe dosing and allow cost-effective production on a large scale. This dosage form is also frequently chosen for the administration of viable probiotic microorganisms. Saccharomyces cerevisiae cells granulated in a fluidized bed process, with dicalcium phosphate (DCP), lactose (LAC) and microcrystalline cellulose (MCC) as carrier materials, were tableted using a compaction simulator, varying the compression stress.

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Due to their ability to self-assemble into complex structures, block copolymers are of great interest for use in a wide range of future applications, such as self-healing materials. Therefore, it is important to understand the mechanisms of their structure formation. In particular, the process engineering of the formation and transition of the polymer structures is required for ensuring reproducibility and scalability, but this has received little attention in the literature.

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