Synthesis of mesoporous silica@Co-Al layered double hydroxide spheres: layer-by-layer method and their effects on the flame retardancy of epoxy resins

Autor:	Zhi-Man Bai, Shu-Dong Jiang, Anna A. Stec, Gang Tang, T. Richard Hull, Yuan Hu, Weizhao Hu, Lei Song
Rok vydání:	2014
Předmět:	Materials science F100 Epoxy Mesoporous silica chemistry.chemical_compound chemistry visual_art visual_art.visual_art_medium Hydroxide General Materials Science Thermal stability Char Composite material Mesoporous material Pyrolysis Fire retardant
Zdroj:	ACS applied materialsinterfaces. 6(16)
ISSN:	1944-8252 1944-8244
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a80ad9b817602787e743e503a7378581 https://pubmed.ncbi.nlm.nih.gov/25062606 Zobrazit plný text záznamu