title: Synthesis of mesoporous silica@Co-Al layered double hydroxide spheres: layer-by-layer method and their effects on the flame retardancy of epoxy resins.
abstract: Hierarchical mesoporous silica@Co-Al layered double hydroxide (m-SiO2@Co-Al LDH) spheres were prepared through a layer-by-layer assembly process, in order to integrate their excellent physical and chemical functionalities. TEM results depicted that, due to the electrostatic potential difference between m-SiO2 and Co-Al LDH, the synthetic m-SiO2@Co-Al LDH hybrids exhibited that m-SiO2 spheres were packaged by the Co-Al LDH nanosheets. Subsequently, the m-SiO2@Co-Al LDH spheres were incorporated into epoxy resin (EP) to prepare specimens for investigation of their flame-retardant performance. Cone results indicated that m-SiO2@Co-Al LDH incorporated obviously improved fire retardant of EP. A plausible mechanism of fire retardant was hypothesized based on the analyses of thermal conductivity, char residues, and pyrolysis fragments. Labyrinth effect of m-SiO2 and formation of graphitized carbon char catalyzed by Co-Al LDH play pivotal roles in the flame retardance enhancement.
authors: State Key Laboratory of Fire Science, University of Science and Technology of China , 96 Jinzhai Road, Hefei, Anhui 230026, China.
authors: Shu-Dong
authors: SD
authors: Jiang
authors: Zhi-Man
authors: ZM
authors: Bai
authors: Gang
authors: G
authors: Tang
authors: Lei
authors: L
authors: Song
authors: Anna A
authors: AA
authors: Stec
authors: T Richard
authors: TR
authors: Hull
authors: Yuan
authors: Y
authors: Hu
authors: Wei-Zhao
authors: WZ
authors: Hu