Synthesis, flame-retardant and smoke-suppressant properties of a borate-intercalated layered double hydroxide

被引：64

作者：

Shi, L ^{[1
]}

Li, DQ ^{[1
]}

Wang, JR ^{[1
]}

Li, SF ^{[1
]}

Evans, DG ^{[1
]}

Duan, X ^{[1
]}

机构：

[1] Beijing Univ Chem Technol, Minist Educ, Key Lab Sci & Technol Controllable Chem React, Beijing 100029, Peoples R China

来源：

CLAYS AND CLAY MINERALS | 2005年 / 53卷 / 03期

关键词：

borate; flame retardant; hydrotalcite; layered double hydroxide; LDH; smoke suppressant;

D O I：

10.1346/CCMN.2005.0530309

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Reaction of a Mg-Al carbonate layered double hydroxide (LDH) with boric acid leads to a borate-pillared LDH with the stoichiometry [Mg0.65Al0.35(OH)(2)][B3O5](0.35).0.65H(2)O and an interlayer spacing of 1.07 nm. Infrared and B-11 magic angle spinning nuclear magnetic resonance data are consistent with the presence of polymeric triborate anions of the type [B3O4(OH)(2)](n)(n) in the interlayer galleries so that the material can be formulated as [Mg0.65Al0.35(OH)(2)][B3O4(OH)(2)](0.35).0.30H(2)O. The flame-retardant properties of the borate-pillared material and the carbonate precursor in composites with ethylene vinyl acetate copolymer were compared. Introduction of the borate anion leads to a significant enhancement in smoke suppression during combustion without compromising the flammability of the material. This is related to the synergistic effect between the host layers of the LDH and the borate anions uniformly distributed in the interlayer region.

引用

页码：294 / 300

页数：7

共 35 条

[1] Synthesis and characterization of boron hydrotalcite-like compounds as catalyst for gas-phase transposition of cyclohexanone-oxime [J].