Flame-Retardant Mechanism of Layered Double Hydroxides in Asphalt Binder

Zhu, Kai; Wang, Yunhe; Tang, Daquan; Wang, Qiang; Li, Haihang; Huang, Ya-dong; Huang, Zhiyi; Wu, Ke

doi:10.3390/ma12050801

Cited by 34 publications

(21 citation statements)

References 37 publications

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“…Recently, in Zhu et al . research study, LDH as FR in asphalt binders was investigated using limited oxygen index (LOI) and cone calorimeter test. ZnMgAl‐CO 3 ‐LDHs synthetic with specific surface area of 13.2 m 2 /g and a purity of 99.0% were used as FR.…”

Section: Introductionmentioning

confidence: 99%

“…ZnMgAl‐CO 3 ‐LDHs synthetic with specific surface area of 13.2 m 2 /g and a purity of 99.0% were used as FR. The FR asphalt was prepared by melt blending, containing 2, 5, 10, and 25 wt % of LDH . Cone calorimeter testing shows that 2 wt % of LDH decreases the peak heat release rate (PHRR) and smoke release rate of asphalt binders; this result can be explained due to the good dispersion of the low dose of LDH.…”

Section: Introductionmentioning

confidence: 99%

“…For the asphalt binders containing 25 wt % LDHs, the LOIs were increased and the heat and smoke release during combustion were decreased. This fact occurs because the decomposition of LDH can absorb the heat release, reducing the burning rate of asphalt …”

Section: Introductionmentioning

confidence: 99%

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Thermal and flammability properties influenced by Zn/Al, Co/Al, and Ni/Al layered double hydroxide in low‐density polyethylene nanocomposites

Jaerger¹

2019

J of Applied Polymer Sci

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Layered double hydroxide (LDH) containing different metal constituents (Zn, Co, and Ni) was intercalated with different organic anions and has been used as fillers in low‐density polyethylene (LDPE), and its thermal and flammability behavior was evaluated. The best thermal stability (∆T0.5 = 21 °C) was obtained with the LDPE‐Ni/Al‐dodecyl sulfate (4 wt %) nanocomposite. Addition of hydrophobic LDHs systematically decreases the enthalpy of melting and crystallization compared to the neat polymer. In LDPE‐Co/Al‐dodecyl sulfate (2 wt %) nanocomposite, the melting and crystallization enthalpies declined by about 45 J/g, indicating a good interaction of the filler with the polymer matrix. A reduction of 20% of the flammability for the LDPE‐Ni/Al‐stearate (4 wt %) nanocomposite was obtained. On the other hand, Zn–Co LDH as filler in LDPE nanocomposite did not affect effectively the same property. In an innovative study, results indicate that different metal constituents and interlayer anion of LDH as filler can change thermal and flammability properties of the polymer nanocomposite. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48737.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal and flammability properties influenced by Zn/Al, Co/Al, and Ni/Al layered double hydroxide in low‐density polyethylene nanocomposites

Jaerger¹

2019

J of Applied Polymer Sci

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“…LDHs can be directly used as ame retardant additives because of their unique chemical properties and layered structures [170][171][172][173][174][175][176][177]. For example, exible polyurethane foam with samples containing 10% ame retardant, the LOI increased from 20.8 to 29.0, the UL-94 rating increased from no to V-0, and the pHRR decreased from 1090 to 284 kW/m 2 , respectively.…”

Section: Silicon-containing Compoundsmentioning

confidence: 99%

Nanoreinforcements of Two-Dimensional Nanomaterials for Flame Retardant Polymeric Composites: An Overview

Hong

Chen

2019

Advances in Polymer Technology

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Polymer materials are ubiquitous in daily life. While polymers are often convenient and helpful, their properties often obscure the fire hazards they may pose. Therefore, it is of great significance in terms of safety to study the flame retardant properties of polymers while still maintaining their optimal performance. Current literature shows that although traditional flame retardants can satisfy the requirements of polymer flame retardancy, due to increases in product requirements in industry, including requirements for durability, mechanical properties, and environmental friendliness, it is imperative to develop a new generation of flame retardants. In recent years, the preparation of modified two-dimensional nanomaterials as flame retardants has attracted wide attention in the field. Due to their unique layered structures, two-dimensional nanomaterials can generally improve the mechanical properties of polymers via uniform dispersion, and they can form effective physical barriers in a matrix to improve the thermal stability of polymers. For polymer applications in specialized fields, different two-dimensional nanomaterials have potential conductivity, high thermal conductivity, catalytic activity, and antiultraviolet abilities, which can meet the flame retardant requirements of polymers and allow their use in specific applications. In this review, the current research status of two-dimensional nanomaterials as flame retardants is discussed, as well as a mechanism of how they can be applied for reducing the flammability of polymers.

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“…LDHs have chemical composition tunability and interlayer anion exchangeability, which endow them with unique properties and functions. Therefore, LDHs have a wide range of applications in many fields, such as catalysts [6], adsorbents [7], corrosion protection [8], and flame-retardant materials [9,10]. Some studies have shown that LDH can absorb a large amount of heat, dilute the concentration of flammable gas, and absorb harmful acid gases during the decomposition process; therefore, it is an excellent flame retardant [11].…”

Section: Introductionmentioning

confidence: 99%

Flame-Retardant and Smoke Suppression Properties of Nano MgAl-LDH Coating on Bamboo Prepared by an In Situ Reaction

Yao

Hua

et al. 2019

Journal of Nanomaterials

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In recent years, bamboo has been widely used for building materials and household goods. However, bamboo is flammable, so a flame-retardant treatment for bamboo is urgently needed. In this work, nano MgAl-layered double hydroxide (MgAl-LDH) coated on bamboo, which was called MgAl-LB, was synthesized by an in situ one-step method. To determine the optimal in situ time, the effects of different reaction times on LDH growth on the bamboo surface and the flame retardancy of the MgAl-LBs were investigated. The SEM observations show that LDH growth on the surface of bamboo was basically saturated when the in situ reaction time was 24 h. Abrasion experiments show that MgAl-LDH coating has good abrasion resistance. The fire performance of the MgAl-LBs was evaluated by cone calorimeter tests, which indicated that the THR and TSP of the MgAl-LBs were significantly lower than those of untreated bamboo. Taking into account the energy consumption problem, determining the reaction time of 24 h is the optimal reaction time. Compared with untreated bamboo, the THR and TSP of MgAl-LB prepared at 24 h decreased by 33.3% and 88.9%, respectively.

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Flame-Retardant Mechanism of Layered Double Hydroxides in Asphalt Binder

Cited by 34 publications

References 37 publications

Thermal and flammability properties influenced by Zn/Al, Co/Al, and Ni/Al layered double hydroxide in low‐density polyethylene nanocomposites

Thermal and flammability properties influenced by Zn/Al, Co/Al, and Ni/Al layered double hydroxide in low‐density polyethylene nanocomposites

Nanoreinforcements of Two-Dimensional Nanomaterials for Flame Retardant Polymeric Composites: An Overview

Flame-Retardant and Smoke Suppression Properties of Nano MgAl-LDH Coating on Bamboo Prepared by an In Situ Reaction

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