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Synthesis and Application of Polymer with Chitosan Functional Structure

Author: LiRu
Tutor: YuLiangMin
School: Ocean University of China
Course: Applied Chemistry
Keywords: Biomimetic synthesis Template Morphology control Polymer Cuprous oxide
CLC: TB391
Type: Master's thesis
Year: 2011
Downloads: 11
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Abstract

Biological systems are able to generate crystalline materials with complex morphologies and specific functions via the processes of biomineralization and these processes are elaborately controlled by some biomacromolecules. Controlled synthesis of inorganic and inorganic/organic composite materials of specific morphology, orientation, organization, complex form, and hierarchical structure has drawn a lot of attention in materials science. The strategy of using organic templates with complex functionalization patterns to control the nucleation, growth, and alignment of crystals has been widely adapted for the biomimetic synthesis of a variety of inorganic materials with complex forms. This thesis focuses on the synthesis of inorganic materials by organic additives, and analysis synthesis condition. All of the materials are characterized and conformed by Infrared spectroscopy (FTIR)、x-ray diffraction(XRD)、scanning electron microscope (SEM) and Energy Dispersive X-Ray Spectrometry (EDS).In the first part, acrylic polymer were synthesized by Acrylic acid、acrylamide、hydroxyethyl acrylate、methyl methacrylate and DMC. All of the polymers were characterized by Infrared spectroscopy (FTIR) and interaction of resin and metalions.In the second part, controlled synthesis of CU2O was studied by four crylicpolymers template in water systems. Crylicpolymer template was an effective crystal growth modifier to direct the growth of CU2O crystal to various morphologies. Moreover, we analyze CU2O crystal morphology by different concentration、temperature and aging time. It is noted that crylicpolymer can induce a well-defined spherical aggregates, shuttle-like and petal-like micromter sized Cu2O crystal.In the third part, firstly, an"emulsion polymerization-extraction"method was applied to prepared doped polyaniline (PANI) solution. In this work, special morphology Cu20 crystal was prepared by choosing polyaniline、polyvinyl alcohol、polyacrylamide and sodium alginate as template. Using polyaniline (content:3%) as template, we obtained cuprous oxide cubes, which aging for 40h, but unchanging the other experimental conditions. The formation mechanism of the special morphology was with the relevant of the selective of organic/inorganic interfaces, which resulted in preferentially growth along special direction. Chrysanthemum-like hybrid CU2O crystals were synthesized by choosing 3% PVA as template, and 15h aging. And using 3% Polyacrylamide and sodium alginate as template sea-urchin-like and spherical aggregates CU2O crystals were synthesized by aging 15h and injecting at high-temperature, but spherical aggregates were obtained when the content of sodium alginate was 5% at the same aging time.

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