Development of sustainable polybenzoxazine-based organic–inorganic hybrid nanocomposites for high voltage insulator applications

• Published in: Journal of materials science. Materials in electronics Vol. 34; no. 7; p. 603
• Main Authors: Iqbal, M. Mohamed, Appasamy, Subasri, Krishnasamy, Balaji, Arumugam, Hariharan, Maheshwari, R. V., Vigneshwaran, B., Vasu, C. L., Muthukaruppan, Alagar
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-03-2023; Springer Nature B.V
• Subjects: Aniline; Benzoxazines; Bisphenol A; Characterization and Evaluation of Materials; Chemistry and Materials Science; Composite materials; Condensates; Condensation polymerization; Curing; Dielectric properties; Engineering; Epoxy resins; Flame retardants; High voltages; Hybrid composites; Laboratories; Materials Science; Moisture absorption; Nanocomposites; Optical and Electronic Materials; Polybenzoxazines; Polymer blends; Polymer matrix composites; Polymerization; Polymers; Porcelain; R&D; Research & development; Silicon dioxide; Thermal stability; Thermogravimetric analysis
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-022-09805-2

The benzoxazines made from cardanol-aniline (C-a), bisphenol-A-aniline (BA-a), and bisphenol-F-aniline (BF-a) were separately reacting with paraformaldehyde through Mannich condensation reaction. Hybrid polymeric blends of binary and ternary compositions were developed using DGEBA, C-a and BA-a/BF-a matrices. Bio-silica was obtained from rice-husk, which was functionalized using glycidoxypropyltrimethoxysilane, reinforced with combinations of binary and ternary blends of epoxy/benzoxazine resins, and then cured with triethylenetetramine (teta). From thermogravimetric analysis, it was inferred that 100 wt% of bio-silica reinforced hybrid poly(C-a/BA-a/DGEBA) and poly(C-a/BF-a/DGEBA) composite samples possess better thermal stability than that of neat matrices. Among the composites, silica reinforced composites possess a lower dielectric constant than that of other composites. The value of break down voltage of 100 wt% of bio-silica reinforced polymer composites namely, poly(DGEBA-teta), poly(C-a 50wt%/DGEBA 50 wt%), poly(C-a/BA-a/DGEBA) and poly(C-a/BF-a/DGEBA) were observed at 25.93, 31.44, 31.74 and 32.30 kV, respectively. According to the data obtained from different experimental studies, hybrid composites made of epoxy resin and benzoxazine with bio-silica reinforcement possess better performance characteristics and can be considered a better suited material for high voltage insulation applications.