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- W2368353325 abstract "Graphene hydrogels were prepared by the sol-gel method,and then used to prepare ammonium perchlorate(AP)/graphene composites by the incorporation of AP.The composites were dried naturally in air,freeze-dried,or dried with supercritical CO_2.Scanning electron microscopy(SEM),elemental analyses(EA),and X-ray diffraction(XRD) were used to characterize the structure of the AP/graphene composites dried using different methods.Furthermore,the thermal decomposition behavior of the AP/graphene composites was investigated by differential scanning calorimetry(DSC) and thermogravimetric analysis/infrared spectroscopy(TG-FTIR).Drying method had an obvious influence on the morphology of the AP/graphene composites; only the AP/graphene composites dried with supercritical CO_2showed similar three-dimensional networks and porous structure to graphene aerogels.Elemental analyses revealed that the AP contents in the AP/graphene composites prepared by drying naturally,freeze-drying,and supercritical CO_2drying were 89.97%,92.41%,and 94.40%,respectively.XRD results showed that AP was dispersed homogeneously on the nanoscale in the AP/graphene composites dried with supercritical CO_2and the average particle diameter of AP was about 69 nm.DSC and TG-FTIR analyses indicated that graphene could promote the thermal decomposition of AP,particularly for the sample dried with supercritical CO_2.Independent of drying method,the low-temperature decomposition of the as-prepared AP/graphene composites was not observed and the high-temperature decomposition was accelerated.Compared to the other two drying methods,graphene in the AP/graphene composites dried with supercritical CO_2showed most obvious promoting effects.The high-temperature decomposition temperature of the AP/graphene composites dried with supercritical CO_2decreased by 83.7 °C compared with that of pure AP,and the total heat release reached 2110 J·g~(-1).Moreover,graphene also took part in the oxidation reactions with oxidizing products,which was confirmed by the generation of CO_2." @default.
- W2368353325 created "2016-06-24" @default.
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- W2368353325 date "2013-01-01" @default.
- W2368353325 modified "2023-09-25" @default.
- W2368353325 title "Effect of Drying Methods on the Structure and Thermal Decomposition Behavior of Ammonium Perchlorate/Graphene Composites" @default.
- W2368353325 hasPublicationYear "2013" @default.
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