阻燃剂水滑石的制备及表面改性研究

Preparation and Surface Modification of Hydrotalcite as Flame Retardant

以氯化镁、γ-AlOOH、氢氧化钠和碳酸氢铵为原料,采用水热法制备了阻燃剂镁铝水滑石晶体。采用XRD,SEM和TG对产品进行了表征。结果表明,在优化条件下可获得结晶度高、热稳定性好、分散性好、均一、规整的六边形片状水滑石晶体。当水热温度为150℃,反应时间为24 h时,合成的水滑石粒径为200～400 nm,片厚度约为20 nm。采用硅烷偶联剂KH560对水滑石进行表面改性,其质量为5%时改性水滑石的效果最好。

Mg-Al hydrotalcite powder as flame retardant was prepared from MgCl2·6H2O,γ-AlOOH,NaOH,and NH4HCO3 as raw materials throug hydrothermal method.The title substance was charaterized by XRD,SEM,and TG.The result showed that the hydrotalcite prepared under the optimum conditions(150 ℃,24 h)had high crystallization degree,good dispersion,homogeneous and regular hexagonal sheetlike morphology with particle size of 200-400 nm,and thickness of about 20 nm.The hydrotalcite had excellant effect on surface modificantion when being surface-modified by silane coupling agent(KH560,5%).