改性碳酸氢钠形貌及热分解性能的研究

Study on Morphology and Thermal Decomposition of Modified Sodium Bicarbonate

将环氧树脂(EP)对不同粒径的碳酸氢钠(SB)进行包覆改性得到改性碳酸氢钠(EP@SB),采用扫描电镜(SEM)、红外(FTIR)、差示扫描量热法(DSC)和热重(TG),探究不同粒径SB下改性碳酸氢钠形貌及热分解性能。结果表明,不同粒径的SB在EP包覆改性后其热分解性能有明显改善,其中200目的SB改性后效果较理想,起始分解温度从120.1℃升高到155.2℃,提高幅度达35.1℃;分解温度区间从58.6℃缩小到了22.6℃。极大扩宽了轻量化制品的应用范围。

Different sizes of sodium bicarbonate(SB)was coated by epoxy resin(EP)to obtain madified sodium bicarbornate(EP@SB),scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FTIR),differential scanning calorimetry(DSC)and thermogravimetry(TG)were used to investigate the effects of different particle sizes modified sodium bicarbonate on the morphology and thermal decomposition properties.The results show that the thermal decomposition properties of SB with different particle sizes can significantly improve after EP coating modification.Modified SB of 200 mesh is ideal,its initial decomposition temperature increases from 120.1 to 155.2℃,which has increased 35.1℃.The decomposition temperature range of the modified SB is reduced from 58.6 to 22.6℃.The research results have greatly expanded the application range of lightweight products.