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Preparation and Properties of Polyurethane Foam Modified by Inorganic Nanoparticles

Author: ZhangYong
Tutor: PengHong；HuangKaiXun
School: Huazhong University of Science and Technology
Course: Organic Chemistry
Keywords: Nano-materials polyurethane removal of nano-dust adsorption of dye
CLC: TB383.1
Type: Master's thesis
Year: 2009
Downloads: 145
Quote: 1
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Abstract


As the development of economy, dust pollution and dye pollution is becoming more serious in our environment. Design of new air filter materials and decolorization materials is always the research hotpot. Soft polyurethane (PU) is one of good filter materials and absorbents materials because of its regular net structure, abundant porosity and changeable pore size. Inorganic nanoparticles such as TiO2 are used in many areas for their larger specific surface area, high Zeta potential, excellent adsorption properties and photocatalytic degradation of organic compound. In this paper, nanoparticle-modified polyurethane foam (NPU) was prepared by dispersing of several kinds of inorganic nanoparticles into polyurethane foam matrix, and the properties of NPU were further investigated. The research method and results are as follows:1. NPU modified by nano-TiO2 and other two inorganic nanoparticles were synthesized by in-situ polymerization method and one-step foaming process. The mechanical intensity of NPU modified by TiO2 has been greatly improved compared to unmodified PU. The results of ESEM implied that nano-TiO2 modified by stearic acid was dispersed better than unmodified nano-TiO2 in NPU even the contents of modified nano-TiO2 was up to 5%.2. Saturation adsorption experiments showed that unmodified nano-TiO2(2%)- NPU is the best adsorption materials for nano-dust in all of the NPU.Its largest adsorption capacitity was 0.071 mg / g NPU , which is twice as much as unmodified PU. In the experiments of dye absorption, the adsorption ability of Unmodified nano-TiO2(1%)- NPU turned out to be the best in absorption of acid fuchsin, Its adsorption capacitity for acid fuchsin reached 1.39 mg/g NPU, while the unmodified PU is only 0.94 mg/g.

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