期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 -, 期 -, 页码 -出版社
WILEY
DOI: 10.1002/app.54575
关键词
epoxy composites; flame retardancy; hybrid; magnesium hydroxide; zinc borate
To enhance the flame retardancy and smoke suppression of epoxy resin (EP), an organic-inorganic hybrid material (MH@ZB-ODOPB) was developed. The hierarchical-structured particles (MH@ZB) were fabricated by depositing zinc borate (ZB) onto magnesium hydroxide (MH) through a heterogeneous deposition process. The modified MH@ZB-ODOPB was obtained by grafting 10-(2,5-dihydroxyphenyl)-10-hydro-9-oxa-10-phospha-phenanthrene-10-oxide (ODOPB) onto MH@ZB. The characterization revealed that ZB was loaded onto MH surface, and ODOPB was grafted on MH@ZB surface. The addition of 7.5 wt% MH@ZB-ODOPB into EP reduced the peak heat release rates, total heat release, total smoke production, and peak smoke production rates by 51.8%, 42.4%, 58.1%, and 66.1% respectively, according to the cone calorimetry test results. Furthermore, EP/MH@ZB-ODOPB showed a limiting oxygen index of 33%, indicating improved flame retardancy and smoke suppression properties. The incorporation of MH@ZB-ODOPB also enhanced the mechanical properties of EP composites, while the double action of MH@ZB-ODOPB in condensed and gas phases was investigated through carbon residue and pyrolysis gas analysis.
To improve the flame retardancy and smoke suppression effect of epoxy resin (EP), a new organic-inorganic hybrid (MH@ZB-ODOPB) was fabricated. First, hierarchical-structured particles (MH@ZB) were prepared by gradually depositing zinc borate (ZB) on the surface of magnesium hydroxide (MH) via a heterogeneous deposition process. Second, MH@ZB was modified with 10-(2,5-dihydroxyphenyl)-10-hydro-9-oxa-10-phospha-phenanthrene-10-oxide (ODOPB) to obtain MH@ZB-ODOPB. Finally, the chemical structure and form of MH@ZB-ODOPB were analyzed via X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and scanning electron microscopy. The characterization results show that ZB was loaded onto the surface of MH, and ODOPB was grafted on the surface of MH@ZB. The cone calorimetry test results show that when 7.5 wt% MH@ZB-ODOPB was added into EP, the peak heat release rates, total heat release, total smoke production, and peak smoke production rates decreased by 51.8%, 42.4%, 58.1%, and 66.1%, respectively. Moreover, EP/MH@ZB-ODOPB exhibited a limiting oxygen index of 33%. These results show that the incorporation of MH@ZB-ODOPB into EP composites considerably improved the flame retardancy and smoke suppression properties of EP composites. The double action of MH@ZB-ODOPB in condensed and gas phases was investigated by analyzing the carbon residue and pyrolysis gas. Furthermore, the implementation of ODOPB improves the mechanical properties of EP composites.
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