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<p>In order to enhance the physical properties of water-based polyacrylate varnishes, a green-modified water-based nano-Al<sub>2</sub>O<sub>3</sub> dispersion was successfully prepared by regulating the content of anti-sedimentation dispersant under the condition of ultrasonication. The results prove that the prepared water-based nano-Al<sub>2</sub>O<sub>3</sub> dispersion is obtained under the condition of 0.4 wt% anti-sedimentation dispersant and 0.5&#xa0;h ultrasonic time and storage stability is observed more than 3&#xa0;months. After adding water-based nano-Al<sub>2</sub>O<sub>3</sub> dispersion at 0.5 wt% mass fraction to water-based polyacrylate varnishes bought from Carpoly, the scratch load is increased from 900 to 1500&#xa0;g. The analysis of scratch surface appearance also reveals that the damage of water-based polyacrylate/Al<sub>2</sub>O<sub>3</sub> nanocomposites film is minimal.</p> Graphical abstract <p>An easy green non-covalent surface modification of commercial nano-Al<sub>2</sub>O<sub>3</sub> was carried out by using anti-sedimentation dispersant (alkylol ammonium salt of acidic polymer) and ultrasonication technology simultaneously, resulting in the formation of a highly well-stable dispersion reported firstly in water and good scratch resistance for water-based polyacrylate varnishes.</p> <p></p>

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Study of green modification of nano-Al2O3 and enhanced scratch resistance of water-based polyacrylate varnishes

  • 期刊论文

  • 发表日期：

    2025年1月14日

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  • Minghua Li,
  • Xiaojin Ge,
  • Peng Wu,
  • He Chu,
  • Zhuo Li

摘要

In order to enhance the physical properties of water-based polyacrylate varnishes, a green-modified water-based nano-Al2O3 dispersion was successfully prepared by regulating the content of anti-sedimentation dispersant under the condition of ultrasonication. The results prove that the prepared water-based nano-Al2O3 dispersion is obtained under the condition of 0.4 wt% anti-sedimentation dispersant and 0.5 h ultrasonic time and storage stability is observed more than 3 months. After adding water-based nano-Al2O3 dispersion at 0.5 wt% mass fraction to water-based polyacrylate varnishes bought from Carpoly, the scratch load is increased from 900 to 1500 g. The analysis of scratch surface appearance also reveals that the damage of water-based polyacrylate/Al2O3 nanocomposites film is minimal.

Graphical abstract

An easy green non-covalent surface modification of commercial nano-Al2O3 was carried out by using anti-sedimentation dispersant (alkylol ammonium salt of acidic polymer) and ultrasonication technology simultaneously, resulting in the formation of a highly well-stable dispersion reported firstly in water and good scratch resistance for water-based polyacrylate varnishes.