期刊
CHEMICAL ENGINEERING JOURNAL
卷 431, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.134013
关键词
Fire safety; High heat resistance; Toughness; MOF derivatives; Smoke suppression
资金
- National Natural Science Foundation of China [21975239]
- Natural Science Foundation of Anhui Province [2108085QE211]
- China Postdoctoral Science Foundation [2020 M671905]
- Postdoctoral Innovative Talents Support Pro-gram [BX20190316]
In this study, a new type of nano-hybrid was obtained by generating copper-cobalt metal oxide on the surface of hydroxylated boron nitride using the MOF-derived strategy. The nano-hybrid was then dispersed in bismaleimide resin, leading to a strong interface interaction. The addition of the nano-hybrid effectively suppressed fire hazard and toxic smoke release, while also improving impact strength and glass transition temperature, expanding the potential application in extreme environments.
In this work, the MOF-derived strategy was used to generate copper-cobalt metal oxide (CuCoOx) in situ on the surface of hydroxylated boron nitride (HO-BN), and a new type of nano-hybrid (HO-BN@CuCoOx) was obtained. Then, HO-BN@CuCoOx was dispersed in the bismaleimide resin (BMI) matrix in the form of a layered structure, forming a strong interface interaction. The results of the cone calorimeter test exhibited that the fire hazard and toxic smoke release of BMI nanocomposites containing 2 wt% HO-BN@CuCoOx were effectively suppressed, such as a 37.2% reduction in total heat release rate (THR), a 38.5% reduction at peak heat release rate (PHRR), 24.3% decrease in total smoke production (TSP) and 62.2% decrease in peaks of carbon monoxide (CO) production rate. Compared with previous studies, higher filling efficiency was achieved. In addition, BMI/HOBN@CuCoOx 0.5 achieved an 80% increase in impact strength, revealing excellent toughness. In particular, the glass transition temperature (Tg) of BMI/HO-BN@CuCoOx 0.5 reached 330?degrees C, an increase of 49 degrees C compared to the pure sample, which increased the potential for application in extreme environments. Therefore, the developed new BMI/HO-BN@CuCoOx nanocomposites expanded the application potential of BMI in the high end field.
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