Flame-retarded polyurethane foam conferred by a bio-based nitrogen‑phosphorus-containing flame retardant

Dong, Faqin; Wang, Yuqi; Wang, Shibo; Shaghaleh, Hiba; Sun, Penghao; Huang, Xujuan; Xu, Xu; Wang, Shifa; Liu, He

doi:10.1016/j.reactfunctpolym.2021.105057

Cited by 38 publications

(28 citation statements)

References 43 publications

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“…The intensity ratio of the D and G bands (I D /I G ) is typically used to evaluate the degree of graphitization. 32 Consistent with TGA curve above 540 C (Figure 3a), the residual char presented a highly graphitized carbon layer structure (I D /I G = 1.07, Figure 3c), which endows the char layer with excellent strength and thermal stability. The presence of phosphorus promotes graphitization, while silicon stabilizes the residue.…”

Section: Characterization Of P/si-acr Particlessupporting

confidence: 70%

Preparation of multifunctional silicon‐phosphorus acrylate particles for the simultaneous improvement of the flame retardancy and mechanical performance of polylactic acid

Gao

Xiao-ming

2022

J of Applied Polymer Sci

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Polylactic acid (PLA) is a biodegradable plastic that currently has limited application owing to its poor fire resistance and brittleness. Herein, a multifunctional silicon‐phosphorus acrylic resin(P/Si‐ACR) is designed to endow both flame retardancy and toughness to PLA. P/Si‐ACR is prepared by seeded emulsion polymerization with polysiloxane as the core layer and diethyl methylphosphonate acrylate and 9, 10‐dihydro‐9‐oxa‐10‐phosphophenanthrene‐10‐oxide acrylate as the shell materials. P/Si‐ACR has a particle size of approximately 200 nm and glass transition temperatures of −38 and 152°C for the core and shell layers, respectively. Addition of 7 wt% P/Si‐ACR to PLA increases the notched impact strength and elongation at break by 124% and 46%, respectively. This improved mechanical performance is due to the elasticity of silicone rubber and the promotion of crystallization by P/Si‐ACR. Combustion testing revealed that the limiting oxygen index increases from 19.1% to 22.5%, while the peak heat release rate decreases by 36%. This enhanced flame retardancy is due to the synergistic effect of phosphorus and silicon, with the former promoting graphitization and inhibiting the free radical degradation of PLA, and the latter stabilizing the char residue. Therefore, P/Si‐ACR is a promising multifunctional modifier that can achieve an optimal balance among flame retardancy, crystallization performance, and toughness in polymers.

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Section: Characterization Of P/si-acr Particlessupporting

confidence: 70%

Preparation of multifunctional silicon‐phosphorus acrylate particles for the simultaneous improvement of the flame retardancy and mechanical performance of polylactic acid

Gao

Xiao-ming

2022

J of Applied Polymer Sci

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“…The fire resistance of such foams and composites decreases due to the generated heat and fire, which penetrate the deeper layers of a structure. Consequently, such a structure of char residues indicates that such char cannot efficiently retard the mass and heat transfer during combustion [ 60 , 61 ].…”

Section: Resultsmentioning

confidence: 99%

Impact of Sunflower Press Cake and Its Modification with Liquid Glass on Polyurethane Foam Composites: Thermal Stability, Ignitability, and Fire Resistance

et al. 2022

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Polyurethane (PUR) foams are some of the most promising thermal insulating materials because of their high flammability, but further applications are limited. Therefore, the development of flame-retardant materials with sufficient strength characteristics, water resistance, and low thermal insulating properties is of great importance to the modern building industry. This study evaluates the possibility of a vacuum-based liquid glass (LG) infusion into bio-based fillers, in this case, sunflower press cake (SFP) particles, to improve the mechanical performance, water absorption, thermal insulation, ignitability, thermal stability, and flame retardancy of the resulting polyurethane (PUR) foam composites. The main findings show that LG slightly improves the thermal stability and highly contributes to the ignitability and flame retardancy of the resulting products. Most importantly, from 10 wt.% to 30 wt.%, the SFP/LG filler reduces the thermal conductivity and water absorption values by up to 20% and 50%, respectively, and increases the compressive strength by up to 110%. The results obtained indicate that the proposed SFP/LG filler-modified PUR foam composites are suitable for applications as thermal insulation materials in building structures.

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“…Due to the pressure from the dwindling petroleum resources, exploiting LMWGs from naturally occurring molecules or their derivatives as building blocks has drawn considerable attention. − First, natural resources impart biocompatibility and biodegradability to supramolecular hydrogels, meeting the requirements for biomedical applications. , In addition, the naturally occurring molecules usually contain unique chiral structures, which may endow the microstructure with chirality. ,− In the past decades, supramolecular hydrogels prepared from cholic acid, − amino acid, , carbohydrate, − glycyrrhizic acid, ,, and so forth have been reported. Rosin as an abundant biomass resource has been widely used in inks, coatings, rubbers, adhesives, food products, and polyurethane materials. − It is mainly composed of abietic acid, which contains an extremely hydrophobic rigid tricyclic hydrophenanthrene skeleton. − Therefore, rosin is a promising candidate for preparing bio-based amphipathic LMWGs. What is more, the rigid structure contains multiple reaction sites, greatly simplifying complicated chemical synthesis. − However, few reports have focused on rosin-based supramolecular hydrogels.…”

Section: Introductionmentioning

confidence: 99%

Novel Temperature-Responsive Rosin-Derived Supramolecular Hydrogels Constructed by New Semicircular Aggregates

Zhai

Song

et al. 2022

J. Agric. Food Chem.

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A highly water-soluble rosin-based surfactant (C 14 -MPA-Na) was synthesized. Novel temperature-responsive supramolecular hydrogels were further prepared using C 14 -MPA-Na. The microstructure and the mechanical properties of the hydrogels were investigated. Unexpectedly, instead of the long one-dimensional structure, a new kind of twisted semicircular aggregate was formed in the hydrogels, which was rarely reported. Besides, the hydrogels possessed excellent shear-recovery properties. Upon heating to 40 °C, the hydrogels transformed into viscoelastic solutions, which were constructed by worm-like micelles. By adjusting the temperature, the hydrogels and the viscoelastic solutions could be freely transformed. Nuclear magnetic resonance spectroscopy and Fourier transform infrared spectroscopy were used to further explore the possible self-assembly mechanism of C 14 -MPA-Na. The curved alkane chain which partially overlapped with rosin's rigid skeleton became stretched when heated to 40 °C. The introduction of the rosin rigid skeleton endowed the supramolecular hydrogels with a novel microstructure and contributed to the development of strategies for the utilization of forest resources.

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Flame-retarded polyurethane foam conferred by a bio-based nitrogen‑phosphorus-containing flame retardant

Cited by 38 publications

References 43 publications

Preparation of multifunctional silicon‐phosphorus acrylate particles for the simultaneous improvement of the flame retardancy and mechanical performance of polylactic acid

Preparation of multifunctional silicon‐phosphorus acrylate particles for the simultaneous improvement of the flame retardancy and mechanical performance of polylactic acid

Impact of Sunflower Press Cake and Its Modification with Liquid Glass on Polyurethane Foam Composites: Thermal Stability, Ignitability, and Fire Resistance

Novel Temperature-Responsive Rosin-Derived Supramolecular Hydrogels Constructed by New Semicircular Aggregates

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