Covalent assembly of MCM-41 nanospheres on graphene oxide for improving fire retardancy and mechanical property of epoxy resin

被引：82
作者：
Li, Zhi [1 ]
Jimenez Gonzalez, Alejandro [1 ,2 ]
Babu Heeralal, Vignesh [1 ]
Wang, De-Yi [1 ]
机构：
[1] IMDEA Mat Inst, C Eric Kandel 2, Madrid 28906, Spain
[2] Univ Rey Juan Carlos, ESCET, C Tulipan S-N, Madrid 28933, Spain
来源：
COMPOSITES PART B-ENGINEERING | 2018年 / 138卷
关键词：
Polymer-matrix composites (PMCs); Fire retardancy; Assembly; Thermosetting resin; LAYERED DOUBLE HYDROXIDE; FLAME-RETARDANT; THERMAL-STABILITY; AMMONIUM POLYPHOSPHATE; RUBBER COMPOSITES; NANOCOMPOSITES; SILICA; FLAMMABILITY; HYBRID; NANOPARTICLES;
D O I：
10.1016/j.compositesb.2017.11.001
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In the study, the hierarchical nanohybrid (GO@MCM-41) with mesoporous MCM-41 nanospheres covalent assembling on graphene oxide (GO) nanosheets was successfully prepared, aiming to improve fire retardancy of epoxy resin (EP). Fourier transformation infrared spectra (FTIR), Raman spectra, X-ray diffraction (XRD), X-ray photoelectron spectra (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) verified GO@MCM-41. The nano-dispersion of GO@MCM-41 in EP was certified via TEM and XRD. Fire-retardant investigation (cone calorimeter test) revealed that EP nanocomposite with 2 wt% GO@MCM-41 possessed a 40.0% drop of peak heat release rate (pHRR) and suppressed smoke production relative to EP/GO. Intriguingly, EP/GO@MCM-41 demonstrated lower pHRR than EP/GO-MCM-41 (direct addition of GO and MCM-41). TG analysis indicated GO@MCM-41 imparted EP with significantly reduced degradation rate and increased char yield, accompanied by reduced volatile in thermogravimetric analysis couple with Fourier transformation infrared spectra (TG-FTIR) and improved aromatization in variable-temperature FTIR. The impact strength of EP/GO@MCM-41 was enhanced by 38.8% compared with EP. Contrastive analysis proposed the mechanism of neighboring synergy of GO and MCM-41, which involved in GO nanosheets wrapped by enormous carbonaceous stuffs due to MCM-41 neighboring catalysis. In perspective, hierarchical nano-assembly with neighboring synergy offered a viable approach for fire-safe polymers.
引用
收藏
页码：101 / 112
页数：12
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