Preparation of Acrylic Resin/Nano-SiO₂ for Leather Finishing Agent

Abstract

Acrylic resin/nano-SiO₂ (AR/nano-SiO₂) composite was prepared by physical blends of acrylic resin (AR) and nano-SiO₂, which was synthesized via the sol–gel way of tetraethoxysilane (TEOS) catalyzed with ammonia. The synthetic conditions of nano-SiO₂ sol in the homogeneous experiment on nanocomposite' property were studied in detail. Transmission Electron Microscopy (TEM) indicated the diameter of nano-SiO₂ kept 10 nm. Differential Scanning Calorimetry (DSC) confirmed the addition of nano-SiO₂ influenced the glass temperature of AR. Moreover, in contrast to acrylic resin, the applied properties of the leather finished by the AR/nano-SiO₂ were measured: air permeability increased by 7.33%, water vapor permeability improved by 9.15% as well as water resistance of light leather by 14.02%, and adhesive of finish by 10.35%.

Keywords:

• Acrylic resin
• Homogeneous experiment
• Leather finishing agent
• Nano-SiO₂
• Sol–gel

ACKNOWLEDGMENTS

This investigation was supported by National Natural Science Foundation (Item No: 20674047), Ministry of Education New Century Excellent Talents Foundation of China (Item No: NCET-04-0973), and the Team Work Project of Science Innovation of Shaanxi University of Science and Technology (Item No.: SUST-A03).

Notes

*“–” shows gel, blank is acrylic resin without sol.

*The score is the total measured by adding the scores of Tensile strength, rate of extension at break, slit strength of films, and sol state.