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Study on Styrene-acrylic Latex Exterior Wall Coating Modified by Nano-ZnO

Author: GuoXiaoJun
Tutor: GuoWenLu
School: Jiangsu University of Science and Technology
Course: Applied Chemistry
Keywords: Nano-ZnO Nano - Modified Styrene paint Orthogonal test Performance testing Characterization
CLC: TQ630.6
Type: Master's thesis
Year: 2010
Downloads: 126
Quote: 0
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Abstract


Nano-ZnO is a larger production and lower prices industrialized functional nano-materials , can be widely used in the paint industry . In order to improve the performance and the grade of the existing phenylpropanoid exterior paint systematic experimental study on the modification and dispersion of nano-ZnO prepared nano ZnO Modified Styrene exterior paint , and nano-ZnO coating the impact of the performance . Experimental study of nano- ZnO dispersed in water , the amount of dispersant , the type of dispersant , pH value , the concentration of nanoparticles and silane coupling agent on the dispersion effect by orthogonal experiment to optimize the dispersion process conditions prepared by a modified nano- ZnO slurry . Then the scanning electron microscope ( SEM ) , Fourier transform infrared spectroscopy , X diffraction instrument intrinsic dispersion of nanoparticles and modification effect . The results show that : the slurry storage stability , nano ZnO smaller particle size and uniform distribution , which laid the foundation for the preparation of nano-ZnO modified coatings . Modified nano- ZnO prepared the nano ZnO Modified Styrene exterior paint , and detection of its main performance . The results show that the Modified Styrene exterior paint artificial aging resistance , scrub resistance , alkali resistance , water resistance , stain resistance and significantly improved storage stability . In addition , the modified nano paint coating greatly shorten the drying time , adhesion and hardness and so superior to the modified prior to coating . SEM results showed that: modified nanometer ZnO added , to improve the dispersibility of pigments and fillers in the coating , enhancing the compatibility between the pigment particles with resin , and to improve the denseness of the coating , and thus significantly improve the paint performance. The gas chromatographic method for the determination of the content of volatile organic compounds in the nano- ZnO Modified Styrene exterior paint , UV method for the determination of formaldehyde content . The test results show that : the VOC and formaldehyde levels were well below the limits specified in GB18582-2001 , is a green paint .

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