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Preparation of Functional Polymeric Nanospheres

Author: LiuGuangFeng
Tutor: LiuPeng
School: Lanzhou University
Course: Polymer Chemistry and Physics
Keywords: Functional polymer nanospheres Polymer hollow nanospheres No saponification microemulsion polymerization Monodisperse Since the template Porous Road Oleic acid
CLC: TB383.1
Type: Master's thesis
Year: 2009
Downloads: 303
Quote: 1
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Abstract


In recent years, the function of monodisperse polymer nanospheres due to their potential applications in more and more people's attention. The material in molecular biology, controlled release drug delivery, drug targeting aspects of treatment and diagnostic immunology expected to achieve a wide range of applications. Focus of this article is prepared with a simple structure is unique functional polymer nanospheres material, the use of micro-emulsion method without saponification prepared a surface with a carboxyl monodisperse polymer nanospheres and one with channel having a carboxyl group having a porous hollow structure monodisperse polymer nanospheres, and through the template was prepared from the surface of the crosslinked polymer having a hydroxyl hollow nanospheres. 1 micro-emulsion polymerization without saponification surface with a monodisperse polystyrene crosslinked carboxyl nanospheres without the use of micro-emulsion method of saponification, styrene (St), divinylbenzene (DVB), oleic acid (OA) as a monomer terpolymer prepared surface with a monodisperse polystyrene crosslinked carboxyl nanospheres, and by dynamic light scattering (DLS) studied the reaction monomer ratio, initiator or the like of the resulting microsphere size and size distribution. Finally prepared with novel surface monodisperse crosslinked polystyrene having carboxyl nanospheres. (2) to spindle-shaped α-Fe 2 O 3 nanoparticles as a template without saponification microemulsion polymerization monodisperse polystyrene hollow porous channel nanospheres studied A simple channel polymer porous hollow nanospheres were prepared polymeric hollow nanospheres with a single dispersion, the surface with a carboxyl group. The method is to use oleic acid {OA [(Z) -9 - octadecenoic acid]} In the spindle-shaped α-Fe 2 O 3 nanoparticle surface chemical modification to enter styrene monomer, divinylbenzene as crosslinking agent without saponification microemulsion polymerization to obtain nuclear as Fe 2 O 3 , shell crosslinked etching away Fe 2 O 3 core, to obtain a surface with a carboxyl Road hollow porous crosslinked polystyrene nanospheres CP (St-OA). 3 Since the template prepared monodisperse hollow surface of polyvinyl alcohol having a hydroxyl group nanospheres template prepared from a novel functional polymer hollow nanospheres approach to linear polyvinyl acetate latex particles (PVAc) as a template prepared monodisperse crosslinked polyvinyl alcohol having a hydroxyl hollow nanospheres. First, the surface portion of the latex particles PVAc PVAc chain is converted by hydrolysis of polyvinyl alcohol (PVA), partially hydrolyzed polyvinyl acetate P (VAc-co-PVA) hydroxyl groups in the chain crosslinked with glutaraldehyde, polyvinyl acetate and then finally vinyl ester can be dissolved and removed nucleus. Hollow polymer nanospheres sizes from particles size control, wall thickness from the linear molecular weight polyvinyl acetate, and the cross-linking degree of hydrolysis degree control.

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