Preparation of MgAl LDHs Intercalated with Amines and Effect on Thermal Behavior for Poly(vinyl chloride)

Xue, Xiaoyu; Zhang, Hongmei; Zhang, Shuhua

doi:10.4236/ampc.2014.412028

Cited by 12 publications

(9 citation statements)

References 14 publications

(18 reference statements)

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“…The analysis of the material is presented in Figure 1. The analysis from the SEM point of view ( Figure 1) at higher magnification, allow the remark of an undoubtedly LDHs morphology [23,28]. The overall results of analysis demonstrate that a well-organized structure was obtained under the applied synthesis conditions.…”

Section: Materials Characterizationmentioning

confidence: 71%

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Modeling of Solid-Fluid non-catalytic Processes for Nickel Ion Removal

Buema¹,

Lupu²,

Chiriac³

et al. 2020

Rev. Chim.

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The aim of this study is modeling of the process of Ni(II) removal onto new materials synthesized by a facile coprecipitation method. The literature presents different surfactants intercalated on MgAl-LDH with applicability for nickel ions removal, but the researches on the use of this material ��as cast�� as adsorbent for Ni(II) ions are limited, it is reason to develop this study. The morphology, chemical composition, and the basic structure of the new material were analyzed by SEM, EDAX, BET, XRD and FT-IR. The kinetic modeling was performed using the pseudo-first-order, four-type linear pseudo-second-order, and intraparticle diffusion. The experimental data demonstrated that the adsorption process is very fast in the first 20 minutes and reach equilibrium after 50 min. The maximum adsorption capacities of the adsorbent are in the range of 36.5-68.18 mg/g, for the 200-500 mg/L initial solution concentration.

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Section: Materials Characterizationmentioning

confidence: 71%

“…https://doi.org/10.37358/RC.20.7.8221 LDH is known as anionic clays, and are extensively studied in the last period due to their properties [23,24]. LDHs have positively charged layers and water molecules between the layers.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Solid-Fluid non-catalytic Processes for Nickel Ion Removal

Buema¹,

Lupu²,

Chiriac³

et al. 2020

Rev. Chim.

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“…The stabilizing effect of magnesium hydroxide due to the absorption of hydrogen chloride released during PVC degradation, which has a direct effect of extending the duration of thermal stability, as measured by the Congo red method, is also described [ 55 ]. The effective activity of hydrotalcite (LDH), which includes, inter alia, magnesium hydroxide and aluminum hydroxide, as the modifier of thermal stability and the reducer of smoke emission during PVC flaming, is explained by authors of studies [ 26 , 56 , 57 , 58 , 59 ] as the absorption and, consequently, reaction between LDH and gaseous HCl evaporated from PVC, which leads to the formation of metal chlorides.…”

Section: Resultsmentioning

confidence: 99%

“…Folarin and Sadiku [ 22 ] reported a possibility of using hydrotalcite, also known as layered double hydroxide (LDH), as an additive which enhances the thermal stability of PVC and has a favorable effect on the reduction of smoke emission during PVC flaming. The stabilizing mechanism of LDH, found based on stability tests performed by the Congo red and TGA methods, was explained by weakening the activity of chlorine atoms and limiting the initiation of dehydrochlorination reaction [ 26 , 27 ]. The stabilizing effect of the layered double hydroxide (MgAlLDHs) was explained by the reaction of hydroxyl groups with hydrogen chloride, which limits the progress of PVC degradation [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

“…The stabilizing mechanism of LDH, found based on stability tests performed by the Congo red and TGA methods, was explained by weakening the activity of chlorine atoms and limiting the initiation of dehydrochlorination reaction [ 26 , 27 ]. The stabilizing effect of the layered double hydroxide (MgAlLDHs) was explained by the reaction of hydroxyl groups with hydrogen chloride, which limits the progress of PVC degradation [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

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Preparation and Characterization of Eco-Friendly Mg(OH)2/Lignin Hybrid Material and Its Use as a Functional Filler for Poly(Vinyl Chloride)

et al. 2017

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A functional magnesium hydroxide/lignin hybrid system was prepared by grinding and mixing the pure precursors using a planetary ball mill. In addition, the thermal stability was assessed based on the total mass loss of the hybrid system within the temperature range of 30–1000 °C, which amounted to 38%. Moreover, the average particle size was at 4.9 μm as determined by the laser diffraction method. The effect of addition of the prepared and characterized Mg(OH)2/lignin hybrid filler at concentrations ranging from 2.5 wt % to 10 wt % on the processing as well as mechanical and thermal properties of composites on the matrix of the unplasticized PVC compound was also evaluated. The addition of a filler to the poly(vinyl chloride) matrix causes a significant improvement of its thermal stability, which is approximately three times higher compared to a polymer without a filler. Furthermore, the prepared composites are additionally characterized by advantageous mechanical properties, especially higher Young’s modulus. A 10% increase in the oxygen index of PVC composites upon addition of 10 wt % hybrid fillers has also been observed, which contributes to an extended range of their application under conditions that require notable fire resistance.

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