Abstract
The search for new green and efficient stabilizers is of great importance for the stabilization of nitro-cellulose(NC).This is due to the shortcomings of traditional stabilizers,such as high toxicity.In this study,reduced polyaniline(r-PANI),which has a similar functional structure to diphenylamine(DPA)but is non-toxic,was prepared from PANI based on the action with N2H4 and NH3-H2O,and used for the first time as a potential stabilizer for NC.XPS,FTIR,Raman,and SEM were used to characterize the reduced chemical structure and surface morphology of r-PANI.In addition,the effect of r-PANI on the stabilization of NC was characterized using DSC,VST,isothermal TG,and MMC.Thermal weight loss was reduced by 83％and 68％and gas pressure release by 75％and 49％compared to pure NC and NC&3％DPA,respectively.FTIR and XPS were used to characterize the structural changes of r-PANI before and after reaction with NO2.The 1535 cm-1 and 1341 cm-1 of the FTIR and the 404.98 eV and 406.05 eV of the XPS showed that the-NO2 was generated by the absorption of NO2.Furthermore,the quantum chemical calculation showed that NO2 was directly immobilized on r-PANI by forming-NO2 in the neighboring position of the benzene ring.
基金项目
National Natural Science Foundation of China(22305123)
维普
万方数据