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<p>This research examines the mechanical, wear, thermal stability, water absorption, and barrier qualities of vinyl ester composites supplemented with Si<sub>3</sub>N<sub>4</sub> and Si<sub>2</sub>N<sub>2</sub>O, two types of biogenic ceramic particles made from rice husk. Using pyrolysis and nitridation techniques, Si<sub>3</sub>N<sub>4</sub> and Si<sub>2</sub>N<sub>2</sub>O particles were separated from rice husk, producing particles with sizes ranging from 60 to 90&#xa0;nm. Among the tested specimens, with a wear rate of 0.01mm<sup>3</sup>/Nm and a water absorption rate of 0.02%, specimen A4 demonstrated the higher wear resistance and barrier qualities of specimens comprising Si<sub>2</sub>N<sub>2</sub>O. The lubricating qualities of Si<sub>2</sub>N<sub>2</sub>O and its capacity to create a dense, impermeable network inside the composite matrix are responsible for this improvement. In contrast, specimens with Si<sub>3</sub>N<sub>4</sub> showed better mechanical qualities, including hardness (85 Shore-D), thermal conductivity (0.82 W/mK), tensile strength (101&#xa0;MPa), flexural strength (140&#xa0;MPa), and a lower mass loss of 2% at a deterioration temperature of 391&#xa0;°C (example B3). In order to maximize composite performance, SEM examination verified the Si<sub>3</sub>N<sub>4</sub> and Si<sub>2</sub>N<sub>2</sub>O particles’ uniform dispersion and strong interfacial bonding within the vinyl ester matrix. These results highlight how rice husk-derived biogenic ceramic particles can be used to customize vinyl ester composites for a range of industrial uses by carefully choosing and treating the particles to balance mechanical strength and wear resistance.</p> Graphical Abstract <p></p>

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Thermal, Wear, Mechanical, Water Absorption and Barrier Properties of Rice Husk Ash Si3N4 and Si2N2O Toughened Vinyl Ester Biocomposite Coating Material

  • 期刊论文

  • 发表日期：

    2025年2月14日

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  • G. Prabhu,
  • K. Senthilkumar,
  • L. Karthick

摘要

This research examines the mechanical, wear, thermal stability, water absorption, and barrier qualities of vinyl ester composites supplemented with Si3N4 and Si2N2O, two types of biogenic ceramic particles made from rice husk. Using pyrolysis and nitridation techniques, Si3N4 and Si2N2O particles were separated from rice husk, producing particles with sizes ranging from 60 to 90 nm. Among the tested specimens, with a wear rate of 0.01mm3/Nm and a water absorption rate of 0.02%, specimen A4 demonstrated the higher wear resistance and barrier qualities of specimens comprising Si2N2O. The lubricating qualities of Si2N2O and its capacity to create a dense, impermeable network inside the composite matrix are responsible for this improvement. In contrast, specimens with Si3N4 showed better mechanical qualities, including hardness (85 Shore-D), thermal conductivity (0.82 W/mK), tensile strength (101 MPa), flexural strength (140 MPa), and a lower mass loss of 2% at a deterioration temperature of 391 °C (example B3). In order to maximize composite performance, SEM examination verified the Si3N4 and Si2N2O particles’ uniform dispersion and strong interfacial bonding within the vinyl ester matrix. These results highlight how rice husk-derived biogenic ceramic particles can be used to customize vinyl ester composites for a range of industrial uses by carefully choosing and treating the particles to balance mechanical strength and wear resistance.

Graphical Abstract