摘要
利用溶胶-凝胶法对密胺甲醛树脂微胶囊红磷(MRP)进行再包覆,制备硅凝胶-密胺甲醛树脂双层包覆红磷(Si-MRP)。通过傅里叶红外光谱、扫描电镜及X射线光电子能谱分析对MRP及Si-MRP进行形态表征。结果表明,通过溶胶-凝胶法在MRP表面包覆硅凝胶,包覆率达95.7%;Si-MRP表面形态相对于MRP更为光滑,样品表面存在少量二氧化硅微球结构。对MRP及Si-MRP进行吸湿性、热稳定性及感度表征,结果表明,硅凝胶包覆后的Si-MRP产物吸湿性下降,90%湿度条件下,10d后的吸湿率为7.5%,而MRP的10d后吸湿率为12%;Si-MRP热稳定性提高,着火点约为450℃,较MRP提升75℃;MRP的摩擦感度为34%,经硅凝胶包覆后,Si-MRP的摩擦感度下降至16%。
Silica-gel/melamine-formaldehyde microencapsulation phosphorus (Si-MRP) is prepared through re-coating silica-gel onto melamine-formaldehyde resin microencapsulation phosphorus (MRP) by sol-gel method.Morphologies and structure of MRP and Si-MRP are tested by FT-IR,SEM and XPS.The results indicate that silica gel has successfully coated onto the surface of MRP,with a coating ratio of 95.7%.Si-MRP exhibits smoother surface morphology than MRP.There exists a small amount of silica microspheres on the surfaces of Si-MRP samples.The water absorption ability,the thermal stability and the mechanical sensitivity of both MRP and Si-MRP are also characterized.The results show that the water absorption ability of Si-MRP drops than before coated by silica gel,staying 7.5% after having been exposed to the moisture environment of 90% humidity for ten days,while that is 12% for MRP.The thermal stability of Si-MRP is also enhanced,with an ignition temperature reaching 450℃,an increase of 75℃ compared with MRP.The friction sensitivity of MRP is 34% and that of Si-MRP falls to 16%.
作者
程晨
杜仕国
鲁彦玲
刘献杰
CHENG Chen;DU Shi-guo;LU Yan-ling;LIU Xian-jie(The Third Department,Army Engineering University,Shijiazhuang 050000,China;Reserve Division No. 76,Yantai 264000,China)
出处
《现代化工》
CAS
CSCD
北大核心
2019年第6期182-186,共5页
Modern Chemical Industry
关键词
微胶囊化
溶胶-凝胶法
硅凝胶
红磷
安定性
microencapsulation
sol-gel method
silica gel
red phosphorus
stability
