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You searched for +publisher:"Universiteit Utrecht" +contributor:("Kegel, W.K."). Showing records 1 – 3 of 3 total matches.

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Universiteit Utrecht

1. Overbeek, C. van. Shear induced order in phase separated polymer solutions.

Degree: 2013, Universiteit Utrecht

The behavior of phase separated polymer solutions under shear was studied by confocal microscopy in cone-plate and coaxial cylinder shear geometries. The observations were combined with macroscopic images, viscosity measurements and heterodyne light scattering velocity profiles. Wormlike banding, gradient banding and continuous phase inversion was observed for samples with a lower viscous dispersed phase at specific shear rates. Shear rates and strains were deduced to be heterogeneously distributed over banded samples as a function of the viscosity ratio between the separated phases. Shear strain and Laplace pressure seem to be the most important variables in determining the structure of a given system. Advisors/Committee Members: Tromp, R.H., Kegel, W.K..

Subjects/Keywords: Shear; Banding; Phase; Separation; Polymer; Viscosity

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APA (6th Edition):

Overbeek, C. v. (2013). Shear induced order in phase separated polymer solutions. (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/283709

Chicago Manual of Style (16th Edition):

Overbeek, C van. “Shear induced order in phase separated polymer solutions.” 2013. Masters Thesis, Universiteit Utrecht. Accessed September 26, 2020. http://dspace.library.uu.nl:8080/handle/1874/283709.

MLA Handbook (7th Edition):

Overbeek, C van. “Shear induced order in phase separated polymer solutions.” 2013. Web. 26 Sep 2020.

Vancouver:

Overbeek Cv. Shear induced order in phase separated polymer solutions. [Internet] [Masters thesis]. Universiteit Utrecht; 2013. [cited 2020 Sep 26]. Available from: http://dspace.library.uu.nl:8080/handle/1874/283709.

Council of Science Editors:

Overbeek Cv. Shear induced order in phase separated polymer solutions. [Masters Thesis]. Universiteit Utrecht; 2013. Available from: http://dspace.library.uu.nl:8080/handle/1874/283709


Universiteit Utrecht

2. Pandelaar, J.P.M. Synthesis of Colloidal (Mixed) Metal Pyrophosphate Salts.

Degree: 2013, Universiteit Utrecht

Mineral deficiency is common worldwide and can lead to serious diseases in the long-term. To prevent such diseases, nutrition can be fortified with dietary minerals. Fortification with colloidal dispersions of water insoluble mineral compounds is an option for liquid products. Colloidal dispersions of (mixed) metal pyrophosphate salts were prepared by different re-precipitation methods: an intermediate was dissolved in HCl and the pH was raised in a controllable way. Stable dispersions of MgPPi, FeIIMgPPi, FeIIIMgPPi and ZnMgPPi were obtained by injection and it was found how the stability depends on a combination of particle size, surface charge and ionic strength of the dispersion medium. Characterization was performed by dynamic light scattering, transmission electron microscopy, energy dispersive X-ray spectroscopy and powder X- ray diffraction. Advisors/Committee Members: Kegel, W.K., Leeuwen, Y.M. van.

Subjects/Keywords: Mineral deficiency; Colloidal dispersions; metal pyrophosphate salts; dynamic light scattering; transmission electron microscopy; energy dispersive X-ray spectroscopy

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Pandelaar, J. P. M. (2013). Synthesis of Colloidal (Mixed) Metal Pyrophosphate Salts. (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/283704

Chicago Manual of Style (16th Edition):

Pandelaar, J P M. “Synthesis of Colloidal (Mixed) Metal Pyrophosphate Salts.” 2013. Masters Thesis, Universiteit Utrecht. Accessed September 26, 2020. http://dspace.library.uu.nl:8080/handle/1874/283704.

MLA Handbook (7th Edition):

Pandelaar, J P M. “Synthesis of Colloidal (Mixed) Metal Pyrophosphate Salts.” 2013. Web. 26 Sep 2020.

Vancouver:

Pandelaar JPM. Synthesis of Colloidal (Mixed) Metal Pyrophosphate Salts. [Internet] [Masters thesis]. Universiteit Utrecht; 2013. [cited 2020 Sep 26]. Available from: http://dspace.library.uu.nl:8080/handle/1874/283704.

Council of Science Editors:

Pandelaar JPM. Synthesis of Colloidal (Mixed) Metal Pyrophosphate Salts. [Masters Thesis]. Universiteit Utrecht; 2013. Available from: http://dspace.library.uu.nl:8080/handle/1874/283704


Universiteit Utrecht

3. Dekker, F. Towards Colloids for Host-Guest Complexation.

Degree: 2015, Universiteit Utrecht

In this research the possibilities were explored to equip colloidal particles with host-guest interactions. Host-guest interactions are a (macro)molecular phenomenon that involves the inclusion of a guest molecule by a larger host molecule. A well studied host is cyclodextrin, which forms inclusion complexes with a wide range of organic molecules with typical binding energies of several kBT. These relative mild interactions make this host-guest complexation interesting to apply on colloidal systems, since these systems are usually dominated by forces in the order of a few kBT. In order to design a system suitable for these interactions, a variety of colloids were equipped with different polymer brushes via a controlled surface initiated polymerisation technique. First it was shown that different particles could be obtained that are suitable for the growth of polymer brushes from the particles. Thereafter, particles with different polymers brushes and block-copolymers brushes were synthesized. It was shown that when these brushes contain reactive groups, they could be used for further modification. When two different particles were prepared, one equipped with host molecules and the other with guest molecules, colloidal aggregation was observed. This provides a proof of concept of for the use of host-guest interactions on a colloidal scale. Additionally, the stability of particles with different polymers and block-copolymers was investigated and an attempt was made to investigated the electrophoretic behavior of the particles but it was concluded that a more detailed investigation is required on this topic. Advisors/Committee Members: Ravensteijn, B.G.P. van, Kegel, W.K..

Subjects/Keywords: Chemistry; Physics; Colloids; ATRP; Atom Transfer Radical Polymerization; polyacrylate; host-guest complexation; brush particles; cyclodextrin; zeta-potential; grafting

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Dekker, F. (2015). Towards Colloids for Host-Guest Complexation. (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/322348

Chicago Manual of Style (16th Edition):

Dekker, F. “Towards Colloids for Host-Guest Complexation.” 2015. Masters Thesis, Universiteit Utrecht. Accessed September 26, 2020. http://dspace.library.uu.nl:8080/handle/1874/322348.

MLA Handbook (7th Edition):

Dekker, F. “Towards Colloids for Host-Guest Complexation.” 2015. Web. 26 Sep 2020.

Vancouver:

Dekker F. Towards Colloids for Host-Guest Complexation. [Internet] [Masters thesis]. Universiteit Utrecht; 2015. [cited 2020 Sep 26]. Available from: http://dspace.library.uu.nl:8080/handle/1874/322348.

Council of Science Editors:

Dekker F. Towards Colloids for Host-Guest Complexation. [Masters Thesis]. Universiteit Utrecht; 2015. Available from: http://dspace.library.uu.nl:8080/handle/1874/322348

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