Herstellung sphärischer Partikel mit dem Strahlschneider-Verfahren

Prüße, Ulf; Dalluhn, J.; Breford, Jürgen; Vorlop, Klaus‐Dieter

doi:10.1002/1522-2640(200008)72:8<852::aid-cite852>3.0.co;2-s

Cited by 6 publications

(2 citation statements)

References 6 publications

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“…These spheres started to regenerate immediately. Even smaller spheres (400-1200 mm diameter) were produced by applying the JetCutter technology [21] by geniaLab (Braunschweig, Germany). This was achieved by cutting a jet of fluid coming out of a nozzle by means of rotating cutting wires into cylindrical segments, which then formed beads due to surface tension on their way to the water bath.…”

Section: Shaping Of the Cellulose Nmmo Solutionsmentioning

confidence: 99%

Aerocellulose: Aerogels and Aerogel‐like Materials made from Cellulose

Innerlohinger

Weber

Kraft

2006

Macromolecular Symposia

189

131

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Cellulose aerogels have been prepared starting from cellulose-NMMO solutions via the classical aerogel-path. Different cellulosic materials have been tested and their influence on the properties of the product aerogels has been studied. Other parameters that have been varied include solution composition as well as the way of cellulose regeneration (solvent and temperature). More than 300 different samples were prepared and analysed. Their density is in a typical range from 0.02 g/cm 3 to 0.2 g/cm 3 and their internal surface area ranges from 100 m 2 /g to 400 m 2 /g. Another property investigated in detail beside density and internal surface area was the shrinkage of the cellulosic bodies during the production process.

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Section: Shaping Of the Cellulose Nmmo Solutionsmentioning

confidence: 99%

Aerocellulose: Aerogels and Aerogel‐like Materials made from Cellulose

Innerlohinger

Weber

Kraft

2006

Macromolecular Symposia

189

131

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“…The effect of surface tension on the shape of fluids and solids in a molten state is well-known [18,19]: the fluid attempts to minimize the total surface area and, thus, will form a spherical shape. This effect is used to round the irregular particles obtained by the grinding process.…”

Section: Downer Reactor For Particle Roundingmentioning

confidence: 99%

A novel process route for the production of spherical LBM polymer powders with small size and good flowability

et al. 2014

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Progress technology in microencapsulation methods for cell therapy

Rabanel

Banquy

Zouaoui

et al. 2009

Biotechnology Progress

122

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Cell encapsulation in microcapsules allows the in situ delivery of secreted proteins to treat different pathological conditions. Spherical microcapsules offer optimal surface-to-volume ratio for protein and nutrient diffusion, and thus, cell viability. This technology permits cell survival along with protein secretion activity upon appropriate host stimuli without the deleterious effects of immunosuppressant drugs. Microcapsules can be classified in 3 categories: matrix-core/shell microcapsules, liquid-core/shell microcapsules, and cells-core/shell microcapsules (or conformal coating). Many preparation techniques using natural or synthetic polymers as well as inorganic compounds have been reported. Matrix-core/shell microcapsules in which cells are hydrogel-embedded, exemplified by alginates capsule, is by far the most studied method. Numerous refinement of the technique have been proposed over the years such as better material characterization and purification, improvements in microbead generation methods, and new microbeads coating techniques. Other approaches, based on liquid-core capsules showed improved protein production and increased cell survival. But aside those more traditional techniques, new techniques are emerging in response to shortcomings of existing methods. More recently, direct cell aggregate coating have been proposed to minimize membrane thickness and implants size. Microcapsule performances are largely dictated by the physicochemical properties of the materials and the preparation techniques employed. Despite numerous promising pre-clinical results, at the present time each methods proposed need further improvements before reaching the clinical phase.

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Herstellung sphärischer Partikel mit dem Strahlschneider-Verfahren

Cited by 6 publications

References 6 publications

Aerocellulose: Aerogels and Aerogel‐like Materials made from Cellulose

Aerocellulose: Aerogels and Aerogel‐like Materials made from Cellulose

A novel process route for the production of spherical LBM polymer powders with small size and good flowability

Progress technology in microencapsulation methods for cell therapy

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