International Journal of New Chemistry
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Green nano bio-synthesis of ZnO/ styrene-butadiene rubber / natural rubber (SBR/ NR) nanocomposite and their assessment by use of curing time and mechanical properties

Document Type : Research Paper

Authors

Monireh Alvand Ghiasvand 1
Sajjad Sedaghat 2
Mohammad Reza Allah Gholi Ghasri 1
Fereshteh Motiei 3
Farrokh Roya Nikmaram 1

1 Department of Chemistry, Yadegar-e-Imam Khomeini (RAH) Shahre-Rey Branch, Islamic Azad University, Tehran, Iran.

2 Department of Chemistry, College of Science, Shahr-e-Qods Branch, Islamic Azad University, Tehran, Iran

3 Department of Chemistry, College of Basic Science, Tehran North Branch, Islamic Azad University, Tehran, Iran

https://doi.org/10.22034/ijnc.2025.720134
Abstract
Zinc oxide nanoparticles (ZnO NPs) were synthesized using Aloysia Citrodora leaf water extract as a reducing and capping agent in an alkaline medium. UV-visible (UV-Vis) spectroscopy, Fourier transforms infrared (FTIR) spectroscopy, Brunauer– Emmett–Teller (BET), and X-ray diffraction (XRD) were used for the evaluation of the synthesized ZnO NPs, scanning electron microscope (SEM) was further used for analyzing the morphology, size, and thermal stability of the particles. The curing time and mechanical features of styrene-butadiene rubber/natural rubber (SBR/NR) regularities, including ZnO NPs, were studied and matched with SBR/NR by using micro-sized (standard) ZnO. The SBR/NR vulcanizate with 0.5 phr (parts per hundred rubber) ZnO NPs showed enhanced curing and mechanical characteristics related to the SBR/NR vulcanizate with 5 phr standard ZnO. FESEM images showed the uniform distribution and good dispersion of ZnO NPs in the nanocomposite. As a result, the mechanical features of the build-up ZnO NPs packed SBR/NR were enhanced. Therefore, ZnO NPs functioned as a curing activator to increase the resulting characteristics of the SBR/NR vulcanizates. The noteworthy point is that the amount of ZnO NPs consumed has a significant decrease compared to the amount of commercial zinc oxide, which is one of the environmental concerns.

Keywords

SBR
Zinc oxide nanoparticles (NPs)
Curing activator– Vulcanizate
Subjects
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International Journal of New Chemistry
Volume 12, Issue 4
Winter 2025
Pages 754-773

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