Preparation and Characterization of Ca-Fe-Ce-based Nitrate Flame Retardants
CHEN Jiang-chao HAN Ning ZHANG Dong-hai CHAI Yu-lin LIU Hai-di CHEN Yun-fa
Institute of Process Engineering Institute of Process Engineering State Key Laboratory of Multi-Phase Complex Systern, Institute of Process Engineering, CAS State Key Laboratory of Multi-Phase Complex Systern, Institute of Process Engineering, CAS State Key Laboratory of Multi-Phase Complex Systern, Institute of Process Engineering, CAS State Key Lab. Multiphase Complex System, Inst. Process Eng., Chinese Academy of Sciences
Abstract:Novel flame retardants were prepared by mechanochemical method using CaO, Fe(NO3)3×9H20 and Ce(NO3)3×6H2O as starting materials. By means of XRD, TG-DTA and ICP techniques, the obtained products were identified as Ca0.51Fe0.49(OH)2(NO3)0.4×0.69H2O (Ca-Fe LDH) and Ca0.51Fe0.37Ce0.12(OH)2(NO3)0.49×0.59H2O (Ca-Fe-Ce LDH). Using Ca-Fe LDH and Ca-Fe-Ce LDH as flame retardant filler, a series of RTVSR (room temperature vulcanized silicone rubber) composites were prepared. The results showed that when adding 70 g Ca-Fe LDH and Ca-Fe-Ce LDH into 100 g PDMS (polydimethylsiloxane), the tensile strength of the obtained RTV composite was about 4.5 MPa and its LOI (limited oxygen index) near 34.5%. When adding 20 g Ca-Fe-Ce LDH into 100 g PDMS, the resulted composite exhibited excellent smoke inhibition behavior with the smallest smoke density of 8.46.