Structure, flame retarding and smoke suppressing properties of Zn-Mg-Al-CO3 layered double hydroxides  

作　　者：Evans D. G. 

机构地区：[1]Key Laboratory for Science and Technology of Controllable Chemical Reactions, Ministry of Education, Beijing University of Chemical Tech- nology, Beijing 100029, China

出　　处：《Chinese Science Bulletin》2005年第11期1101-1104,共4页

基　　金：the National Natural Science Foundation of China(Grant No.90306012).

摘　　要：Zn-Mg-Al-CO3 layered double hydroxides (LDHs) have been synthesized by a new method involving separate nucleation and aging steps. The Zn-Mg-Al-CO3 LDHs were characterized by XRD, FT-IR, ICP and TG-DTA. The limiting oxygen index and smoke density of composites of the LDHs with EVA-28 were determined. Incorporation of Zn2+ in the layers of the LDHs was found promoting mate- rial charring and smoke suppression. The mechanism of flame retardation and smoke suppression is discussed. The results show that Zn-Mg-Al-CO3 LDHs have better flame retarding and smoke suppressing effects than Mg-Al-CO3 LDHs.Zn-Mg-Al-CO3 layered double hydroxides (LDHs) have been synthesized by a new method involving separate nucleation and aging steps. The Zn-Mg-Al-CO3 LDHs were characterized by XRD, FT-IR, ICP and TG-DTA. The limiting oxygen index and smoke density of composites of the LDHs with EVA-28 were determined. Incorporation of Zn2+ in the layers of the LDHs was found promoting material charring and smoke suppression. The mechanism of flame retardation and smoke suppression is discussed. The results show that Zn-Mg-Al-CO3 LDHs have better flame retarding and smoke suppressing effects than Mg-Al-CO3 LDHs.

关 键 词：分层双氢氧化物 烟尘控制 成核现象 火焰延迟 

分 类 号：O614[理学—无机化学]