Large scale synthesis of porous microspheres of Mg–Al-layerd double hydroxide with improved fire suppression effectiveness

Ni, Xiaomin; Kuang, Kaiqian; Xiang, Jin; Xiao, Xiukun; Liao, Guangxuan

doi:10.1016/j.solidstatesciences.2010.01.003

Cited by 21 publications

(9 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has been shown that sonication assists rehydration of hydrotalcite via a “shape-memory”-like reaction 28 . Besides, sonication was applied at the stage of synthesis of Mg 3 Al-CO 3 to promote a formation of uniform LDH microparticles 29 . Ultrasound was also used in the LDH formation to assist synthesis 30 , anion-exchange reactions 31,32 and in the LDH functionalization 33,34 .…”

Section: Introductionmentioning

confidence: 99%

Sonication accelerated formation of Mg-Al-phosphate layered double hydroxide via sol-gel prepared mixed metal oxides

Sokol

Vieira

Žarkov

et al. 2019

Sci Rep

View full text Add to dashboard Cite

Single-phase magnesium-aluminium layered double hydroxide (LDH) intercalated with dihydrogen phosphate was successfully produced by hydration of nanopowder of the respective mixed metal oxide (MMO) obtained using sol-gel based method followed by a two-step anion exchange hydroxide-to-chloride and chloride-to-phosphate. The MMO with the metal cation ratio of Mg/Al = 2:1 was prepared using the aqueous sol-gel method. Processes of the parent Mg 2 Al-OH LDH formation and the successive anion-exchanges, ОН − → Cl − and Cl − → H 2 PO 4 − , were considerably accelerated via the application of high-power (1.5 kW) ultrasound. The crystalline phases formed at all stages of the Mg 2 Al-H 2 PO 4 LDH production were characterized using X-ray diffraction, scanning electron microscopy, scanning transmission electron microscopy, inductive coupled plasma optical emission spectroscopy, Fourier transform infrared spectroscopy, and thermogravimetric analysis. Based on the data of chemical analysis and the XRD data, the type of the intercalated phosphate anion was determined and the arrangement of this anion in the interlayer was modelled.

show abstract

Section: Introductionmentioning

confidence: 99%

Sonication accelerated formation of Mg-Al-phosphate layered double hydroxide via sol-gel prepared mixed metal oxides

Sokol

Vieira

Žarkov

et al. 2019

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Mg-Al LDHs with textural porosity were demonstrated to form via coprecipitation reactions. NaOH/Na2CO3 [8,9] or urea [10,11] works as an alkalization agent to precipitate LDH crystals from MgCl2 • 6H2O and AlCl3 • 6H2O at a relatively low temperature below 100 °C. Also, there has been reports on the synthesis of Ni-Al LDH [12],…”

Section: Textual Porosity As a Results Of Aggregated Crystalsmentioning

confidence: 99%

“…There have been some reports on the preparation of LDH hollow microspheres by optimizing crystallization, dissolution, and recrystallization of constituent crystals [15][16][17]. Activating the reaction steps of nucleation, crystal growth, and aggregation is a key to tune the textural porosity, and for this purpose, using sonication and/or adding ethylene glycol and glycine as a chelating agent have been employed [9,18,19]. The use of chelating agent also plays an important role to control structure and size of each crystals as well as the stability of crystals [20,21].…”

Section: Textual Porosity As a Results Of Aggregated Crystalsmentioning

confidence: 99%

“…For example, porous ZnO/ZnAl2O4 crystalized from Zn-Al LDH exhibit excellent cycling stability as an anode material for Li-ion batteries [22] and enhanced adsorption and photocatalytic properties toward Congo red [102]. Also, there are reports on the applications of porous LDH for fire suppression [9], designing superhydrophobic surface [24], electrochromic coating [133], erasable antireflective [71], and gas sensors [63]. For all these applications, the introduced porosity play important roles to generate respective properties (Table 6).…”

Section: Othersmentioning

confidence: 99%

See 1 more Smart Citation

3D hierarchical and porous layered double hydroxide structures: an overview of synthesis methods and applications

Prevot

Tokudome

2017

J Mater Sci

View full text Add to dashboard Cite

International audienceNanostructured layered double hydroxide (LDH) materials with unique diffusion properties, large surface area along with desired functionalities have recently been produced for a number of well-established and advanced fields of applications. In this review, we describe and discuss the main synthetic methods that have been reported for the fabrication of porous LDH with tailored chemical composition and porosity. The efficiency of soft and hard templating approaches is particularly reviewed. A special emphasis is put on the microstructure and porosity of the materials according to the synthetic method involved. Finally, the performance enhancement of the materials due to the presence of porosity, especially macroporosity, in applications such as pollutant removal, catalysis and energy storage and conversion is overviewed

show abstract

“…The increase in the ignition time of the FR-MDFs was due to the early decomposition of LDH, which absorbs heat and partly decomposes into water vapor and CO2. However, the early degradation of MP resulted in intermolecular dehydration reaction that partly releases melamine pyrophosphate and phosphorus acid (Camino et al1991;Ni et al 2010). Moreover, the synergistic effect of the MP and LDH compounds leads to effective flame retardancy in the FR-MDFs.…”

Section: Cone Calorimetric Experiments Of Mdfmentioning

confidence: 99%

Flame Retardant Efficiency of Melamine Pyrophosphate with Added Mg-Al-Layered Double Hydroxide in Medium Density Fiberboards

Liang¹,

Zhang²,

Chen³

et al. 2016

BioResources

View full text Add to dashboard Cite

The main objective of this study was to investigate the flame retardant (FR) efficiency of melamine pyrophosphate (MP) with added layered double hydroxide (LDH) in medium density fiberboards (MDFs) to be used as building decorative materials. The thermal degradation, FR efficiency, and combustion properties of MDF were analyzed by Fourier transform infrared spectra (FTIR), thermogravimetric analysis (TGA), limiting oxygen index (LOI) test, and cone calorimetric test. The TGA results showed that the combination of MP and LDH led to a lower decomposition temperature than the pure MP and pure LDH. The LOI results showed that the LOI values increased with the addition of the FRs. The cone calorimetric results showed that the addition of four proportions (1:1, 2:1, 1:2, and 1:3) of the compounds into MDF can clearly decrease the peak heat release rate (PHRR) and mean heat release rate (MHRR). The results indicated that the MP and LDH compounds have a synergistic effect to improve the flame retardancy and smoke suppression in the MDFs. The combination of MP and LDH in a 1:1 ratio under 10 wt% FR addition has the best flame retardant efficiency in the MDFs.

show abstract

Large scale synthesis of porous microspheres of Mg–Al-layerd double hydroxide with improved fire suppression effectiveness

Cited by 21 publications

References 25 publications

Sonication accelerated formation of Mg-Al-phosphate layered double hydroxide via sol-gel prepared mixed metal oxides

Sonication accelerated formation of Mg-Al-phosphate layered double hydroxide via sol-gel prepared mixed metal oxides

3D hierarchical and porous layered double hydroxide structures: an overview of synthesis methods and applications

Flame Retardant Efficiency of Melamine Pyrophosphate with Added Mg-Al-Layered Double Hydroxide in Medium Density Fiberboards

Contact Info

Product

Resources

About