Preparation and Properties of Nano-ZnO/Modified Hydrogenated Castor Oil Composites
DUAN Li-min1,3, MA Jian-zhong1,2, LYU Bin1,2, LU Juan3, WU Xiong-hu3
1. College of Resources and Environment, Shaanxi University of Science & Technology, Xi'an 710021, China;
2. Shaanxi Research Institute of Agricultural Products Processing Technology, Xi'an 710021, China;
3. China Leather and Footwear Industry Research Institute, Beijing 100016, China
Abstract：In order to improve the dispersibility of ZnO nanoparticles in the organic phase, isopropyl tri(dioctyl pyrophosphate acyloxy) titanate(NDZ201) was used to modify ZnO nanoparticles. Scanning electron microscopy(SEM) was used to characterize the morphology of the nano-ZnO after modification, Fourier transform infrared spectrometer(FTIR spectrometer) was used for investigating the chemical structure of the modified nano-ZnO, and ultraviolet-visible spectrophotometer(UV-Vis) and contact angle tester(CA) were used in detecting the properties of the modified nano-ZnO. The results show that ZnO nanoparticles are modified successfully by NDZ201, the dispersibility of which is improved after modification. What's more, the hydrophobicity of the particle is improved significantly and the lipophilic degree together with UV absorption increase. Afterwards, NDZ201 modified ZnO nanoparticles are introduced into hydrogenated castor oil to prepare nano-ZnO/modified hydrogenated castor oil composites, and then the composites are applied to leather fiber. It is found that the latex particles of nano-ZnO/modified hydrogenated castor oil composites are spherical. ZnO nanoparticles and modified hydrogenated castor oil exhibit synergistic effect in UV-shielding. Moreover, the anti-yellowing property of leather sample treated with the composites is superior to that of which treated with the pure modified hydrogenated castor oil under the same test condition.
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