Preparation of novel hydrophobic magnetic Fe3O4/waterborne polyurethane nanocomposites |
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| Authors: | Lei Yang Qi Fu Heqing Fu |
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| Affiliation: | 1. School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou, 510640 People's Republic of China Shaoguan University, Shaoguan, 512005 People's Republic of China;2. School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou, 510640 People's Republic of China |
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| Abstract: | Magnetic Fe3O4/waterborne polyurethane nanocomposites were synthesized based on waterborne polyurethane (WPU) and amino-functionalized Fe3O4 by in situ polymerization. The Fe3O4 nanoparticle was found to be uniformly distributed in Fe3O4/WPU nanocomposites with linear or crosslinked structure. In addition, the formation mechanism and magnetic conduction mechanism of stable inorganic–organic nanocomposites were discussed. The experimental results showed that the thermal stability, magnetic, and mechanical properties of magnetic Fe3O4/waterborne polyurethane nanocomposites were improved by amino functionalized Fe3O4. Furthermore, the defoaming property of the emulsion and the hydrophobic property of magnetic Fe3O4/waterborne polyurethane nanocomposites were improved by the 1-hexadecanol-terminated prepolymer. What more, polycaprolactone (PCL)-based Fe3O4/WPU nanocomposites have excellent mechanical properties (The tensile strength is over 30 MPa, the elongation rate is above 300%.) and magnetic properties. Magnetic Fe3O4/waterborne polyurethane nanocomposites will be used in the field of hydrophobic and microwave absorbent materials. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137, 48546. |
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| Keywords: | composites functionalization of polymers inorganic polymers magnetic polymers polyurethanes |
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