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Advances in Nano Research
  Volume 14, Number 4, April 2023 , pages 355-362

Application of SiO2 nanocomposite ferroelectric material in preparation of trampoline net for physical exercise
Zhanguo Su, Junyan Meng and Yiping Su

    Physical exercise, especially intense exercise and high intensity interval training (HIIT) by trampoline, can lead to muscle injuries. These effects can be reduced with intelligent products made of nanocomposite materials. Most of these nanocomposites are polymers reinforced with silicon dioxide, alumina, and titanium dioxide nanoparticles. This study presents a polymer nanocomposite reinforced with silica. As a result of the rapid reaction between tetraethyl orthosilicate and ammonia in the presence of citric acid and other agents, silica nanostructures were synthesized. By substituting bis (4-amino phenoxy) phenyl-triptycene in N, N-dimethylformamide with potassium carbonate, followed by catalytic reduction with hydrazine and Pd/C, the diamine monomer bis (4-amino phenoxy) phenyl-triptycene is prepared. We synthesized a new polyaromatic (imide) with triptycene unit by sol-gel method from aromatic diamines and dianhydride using pyridine as a condensation reagent in NMP. PI readily dissolves in solvents and forms robust and tough polymer films in situ. The FTIR and NMR techniques were used to determine the effects of SiO2 on the sol-gel process and the structure of the synthesized nanocomposites. By using a simultaneous thermal analysis (DTA-TG) method, the appropriate thermal operation temperature was also determined. Through SEM analysis, the structure, shape, size, and specific surface area of pores were determined. Analysis of XRD results is used to determine how SiO2 affects the crystallization of phases and the activation energy of crystallization.
Key Words
    nanocomposite; physical exercise; PI/SiO2; SiO2 nanoparticles; sol-gel method
Zhanguo Su: Huainan Normal University, Huainan 232038, Anhui, China/ International College, Krirk University, Bangkok 10220, Thailand

Junyan Meng: Huainan Normal University, Huainan 232038, Anhui, China

Yiping Su: Faculty of Mathematics and Science, Universitity Pendidikan Sultan Idris, Malaysia

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