Preparation and investigation of the combustion behavior of polypropylene/organomodified MgAl-LDH micro-nanocomposite

Wang, De‐Yi; Leuteritz, Andreas; Kutlu, Burak; Landwehr, Maria Auf der; Jehnichen, Dieter; Wagenknecht, Udo; Heinrich, Gert

doi:10.1016/j.jallcom.2010.12.138

Cited by 101 publications

(78 citation statements)

References 15 publications

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“…A few milligram sizes of samples were used in MCC test, avoiding the samples preparation problems encountered for cone calorimetry [25,26]. Heat release rate (HRR) curves of cobalt alginate, manganese alginate, and sodium alginate as a function of temperature are shown in Fig.…”

Section: MCCmentioning

confidence: 99%

Effect of manganese and cobalt ions on flame retardancy and thermal degradation of bio-based alginate films

et al. 2015

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Bio-based cobalt alginate and manganese alginate films were prepared by a facile ionic exchange and casting approach. Their flame retardancy, thermal degradation, and pyrolysis properties were investigated by vertical burning (UL-94), limiting oxygen index (LOI), thermogravimetric analysis, microscale combustion calorimetry (MCC), thermogravimetric analyzer coupled with Fourier transform infrared analysis (TG-FTIR), and pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS). It showed that cobalt alginate film had much higher LOI value (45.0 %) than those of manganese alginate film (30.7 %) and sodium alginate film (24.5 %). Moreover, cobalt alginate film passed UL-94 V-0 rating, while manganese alginate and sodium alginate films showed no rating. Importantly, peak of heat release rate of cobalt alginate and manganese alginate in MCC test was much lower than that of sodium alginate, suggesting that the addition of cobalt ion and manganese ion decreases the release of combustible gases. TG-FTIR and Py-GC-MS results indicated that cobalt alginate and manganese alginate produced much less gaseous products than that of sodium alginate. Finally, a possible thermal degradation mechanism of cobalt alginate and manganese alginate had been proposed. The results provided useful information for understanding flame-retardant mechanism of alginate as well as for designing bio-based materials with excellent fire-retardant properties.

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Section: MCCmentioning

confidence: 99%

Effect of manganese and cobalt ions on flame retardancy and thermal degradation of bio-based alginate films

et al. 2015

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“…Therefore, LDH has attracted considerable attention as a flame retardant and thermal stabilizer [30][31][32][33][34][35][36][37][38]. In particular, Wang et al confirmed that MgAl LDH and CoAl LDH can efficiently improve the flame retardancy of PP [39,40]. In addition, the Ni-based LDH' catalysts are highly active and cost-effective in the partial oxidation and steam reforming of methane to produce H 2 [41,42].…”

Section: Introductionmentioning

confidence: 99%

Thermal Stability, Combustion Behavior, and Mechanical Property in a Flame-Retardant Polypropylene System

2017

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Abstract:In order to comprehensively improve the strength, toughness, flame retardancy, smoke suppression, and thermal stability of polypropylene (PP), layered double hydroxide (LDH) Ni 0.2 Mg 2.8 Al-LDH was synthesized by a coprecipitation method coupled with the microwave-hydrothermal treatment. The X-ray diffraction (XRD), morphology, mechanical, thermal, and fire properties for PP composites containing 1 wt %-20 wt % Ni 0.2 Mg 2.8 Al-LDH were investigated. The cone calorimeter tests confirm that the peak heat release rate (pk-HRR) of PP-20%LDH was decreased to 500 kW/m 2 from the 1057 kW/m 2 of PP. The pk-HRR, average mass loss rate (AMLR) and effective heat of combustion (EHC) analysis indicates that the condensed phase fire retardant mechanism of Ni 0.2 Mg 2.8 Al-LDH in the composites. The production rate and mean release yield of CO for composites gradually decrease as Ni 0.2 Mg 2.8 Al-LDH increases in the PP matrix. Thermal analysis indicates that the decomposition temperature for PP-5%LDH and PP-10%LDH is 34 • C higher than that of the pure PP. The mechanical tests reveal that the tensile strength of PP-1%LDH is 7.9 MPa higher than that of the pure PP. Furthermore, the elongation at break of PP-10%LDH is 361% higher than PP. In this work, the synthetic LDH Ni 0.2 Mg 2.8 Al-LDH can be used as a flame retardant, smoke suppressant, thermal stabilizer, reinforcing, and toughening agent of PP products.

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“…[34] The peaks appearing at 3697 cm ¡1 and 431 cm ¡1 for the MLHÀMPP/chitosan nanocomposite spectrum reveal the presence of multi-coordinate hydroxyl groups of MgO and metalÀoxygen bonds in the brucite-like lattice, respectively. [36,37] These peaks indicate that the MLHÀMPP nanocomposite is present in the coated nanocomposite.…”

Section: ¡1mentioning

confidence: 99%

Development of a novel nanocomposite consisting of 3-(4-methoxyphenyl)propionic acid and magnesium layered hydroxide for controlled-release formulation

Hashim

Misuan

Isa

et al. 2016

Journal of Experimental Nanoscience

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Magnesium layered hydroxide (MLH) intercalated with anionic 3-(4-methoxyphenyl)propionic acid (MPP) was synthesised by a direct reaction method using magnesium oxide and MPP as precursors. A further coating of chitosan was applied on the external surface of MLHÀMPP nanocomposite to form a new material, named MLHÀMPP/chitosan nanocomposite. The XRD pattern showed an intense and sharp peak at basal spacing 18.9 A , proving that MPP anions were successfully intercalated into the interlayer gallery of MLH in a monolayer arrangement. The XRD pattern of the MLHÀMPP/chitosan nanocomposite shows similar peaks with the MLHÀMPP nanocomposite. The result was also supported by FTIR spectra and elemental analysis. TGA/DTG spectra showed that the thermal stabilities of the guest anion in the both nanocomposites were markedly enhanced. A controlled-release study of the MPP ion from the MLHÀMPP/chitosan nanocomposite showed a slower release compared to MLHÀMPP nanocomposite with an initial rapid release and slow release thereafter. Meanwhile, the release behaviours of MPP ions from both nanocomposites were governed by pseudo-second order kinetics. This result highlights the potential of the nanocomposite as an encapsulated material for the controlled-release formulation of MPP anions.

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Preparation and investigation of the combustion behavior of polypropylene/organomodified MgAl-LDH micro-nanocomposite

Cited by 101 publications

References 15 publications

Effect of manganese and cobalt ions on flame retardancy and thermal degradation of bio-based alginate films

Effect of manganese and cobalt ions on flame retardancy and thermal degradation of bio-based alginate films

Thermal Stability, Combustion Behavior, and Mechanical Property in a Flame-Retardant Polypropylene System

Development of a novel nanocomposite consisting of 3-(4-methoxyphenyl)propionic acid and magnesium layered hydroxide for controlled-release formulation

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