Temperature-Responsive Intumescent Chemistry toward Fire Resistance and Super Thermal Insulation under Extremely Harsh Conditions

Wang, Ting; Long, Man-Cheng; Zhao, Haibo; An, Wenli; Xu, Shimei; Deng, Cong; Wang, Yu‐Zhong

doi:10.1021/acs.chemmater.1c01408

Cited by 68 publications

(26 citation statements)

References 41 publications

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“…This section summarizes the qualitative study of the flame-retardant property of the syntactic foams. However, some classic flame-retardant tests, such as limiting oxygen index, UL-94, cone calorimetry experiments, and so on, − can be performed to further quantify the flame-retardant properties in our future studies.…”

Section: Results and Discussionmentioning

confidence: 99%

A Thermoset Shape Memory Polymer-Based Syntactic Foam with Flame Retardancy and 3D Printability

Abedin

Feng

Ibekwe

et al. 2022

ACS Appl. Polym. Mater.

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Here we report a thermoset shape memory polymer-based syntactic foam inherently integrated with flame retardancy, good mechanical properties, excellent shape memory effect, and 3D printability. The syntactic foam is fabricated by incorporating a high-temperature shape memory polymer (HTSMP) as the matrix, with 40 vol % hollow glass microspheres (HGM) K20, K15, and K1 as fillers. Compressive behavior, strain-controlled programming followed by free recovery, stress recovery, and flame retardancy of these three syntactic foams were studied. Dynamic mechanical analysis and thermal characterization validate their high glass transition temperature ( T g = ∼250 °C) and excellent thermal stability. Our results suggest that the foam consisting of K20 HGM exhibits high compressive strength (81.8 MPa), high recovery stress (6.8 MPa), and excellent flame retardancy. Furthermore, this syntactic foam was used for three-dimensional (3D) printing by an extruder developed in our lab. Honeycomb, sinusoidal shapes, and free-standing helical spring were printed for demonstration. This high-temperature photopolymer-based syntactic foam integrated with high T g , flame retardancy, high recovery stress, and 3D printability can be beneficial in different sectors such as aerospace, construction, oil and gas, automotive, and electronic industries.

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Section: Results and Discussionmentioning

confidence: 99%

A Thermoset Shape Memory Polymer-Based Syntactic Foam with Flame Retardancy and 3D Printability

Abedin

Feng

Ibekwe

et al. 2022

ACS Appl. Polym. Mater.

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“…The HGC aerogel will be used for a long time in flammable and explosive places, such as oil/organic solvent absorption or thermal insulation, where fire accidents have occasionally occurred in recent years. , Therefore, the HGC aerogel should have high flame retardancy to ensure the safety of practical applications. , As shown in Figure g, the HGC aerogel was difficult to be ignited in the air and immediately extinguished after the removal of fire, indicating excellent fire safety. Actually, the aerogel exhibits a high limiting oxygen index value of 28%, compared to 17% of commercial polyurethane foam.…”

Section: Results and Discussionmentioning

confidence: 99%

“…37,38 Therefore, the HGC aerogel should have high flame retardancy to ensure the safety of practical applications. 33,39 As shown in Figure 4g, the HGC aerogel was difficult to be ignited in the air and immediately extinguished after the removal of fire, indicating excellent fire safety. Actually, the aerogel exhibits a high limiting oxygen index value of 28%, compared to 17% of commercial polyurethane foam.…”

Section: Resultsmentioning

confidence: 99%

Ultralight Biomass Aerogels with Multifunctionality and Superelasticity Under Extreme Conditions

Wang

Zhao

et al. 2021

ACS Appl. Mater. Interfaces

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Biomass aerogels are highly attractive candidates in various applications due to their intrinsic merits of high strength, high porosity, biodegradability, and renewability. However, under low-temperature harsh conditions, biomass aerogels suffer from weakened mechanical properties, become extremely brittle, and lose functionality. Herein, we report a multifunctional biomass aerogel with lamella nanostructures (∼1 μm) fabricated from cellulose nanofibers (∼200 nm) and gelatin, showing outstanding elasticity from room temperature to ultralow temperatures (repeatedly bent, twisted, or compressed in liquid nitrogen). The resultant aerogel exhibits excellent organic solvent absorption, thermal infrared stealth, and thermal insulation performance in both normal and extreme environments. Even at dry ice temperature (−78 °C), the aerogel can selectively and repeatedly absorb organic solvents in the same way as room temperature with high capacities (90–177 g/g). Excellent heat insulation and infrared stealth performances are achieved in a wide temperature range of −196 to 80 °C. Further, this aerogel combines with the advantages of ultralow density (∼6 mg/cm3), biodegradability, flame retardancy, and performance stability, making it a perfect candidate for multifunctional applications under harsh conditions. This work greatly broadens application temperature windows of biomass aerogels and sheds light on the development of mechanically robust biomass aerogels for various applications under extreme conditions.

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“…Polymers are widely used in every part of our lives and play an irreplaceable role [ 1 , 2 , 3 , 4 ]. However, the vast majority of polymers are faced with high flammability, which limits their applications [ 5 , 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

A Phosphorus-Nitrogen-Carbon Synergistic Nanolayered Flame Retardant for Polystyrene

Yuan

Zhao

et al. 2022

Polymers

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Polymers are widely used in our daily life; however, most of them are highly flammable. Once modified with flame retardants (FRs), polymers always have deteriorative properties in mechanical strength aspects. As a countermeasure, a novel unified phosphorus and nitrogen-containing organic nano-layered flame retardant (BA-MA) was synthesized by the assembly of biphenyl-4,4′-diphosphonic acid (BA) and melamine (MA), which was used as an additive flame retardant for polystyrene (PS) resin. The chemical structure and morphology of BA-MA were characterized, and a possible growth mechanism of the nanolayered structure was presented in detail. The resulting BA-MA with a thickness of about 60 nm can be uniformly dispersed in the PS resin, thus maintaining the mechanical properties of the material. Remarkably, under only 1 wt% loading of BA-MA, the flammability of PS can be largely reduced with a 68% reduction in the peak heat release rate. Additionally, the smoke release was also significantly inhibited. The research on flame retardant mechanisms shows that BA-MA mainly produces incombustible gas to dilute the concentration of combustibles and promote the formation of aromatic carbon layers to isolate oxygen transmission and heat transfer.

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Temperature-Responsive Intumescent Chemistry toward Fire Resistance and Super Thermal Insulation under Extremely Harsh Conditions

Cited by 68 publications

References 41 publications

A Thermoset Shape Memory Polymer-Based Syntactic Foam with Flame Retardancy and 3D Printability

A Thermoset Shape Memory Polymer-Based Syntactic Foam with Flame Retardancy and 3D Printability

Ultralight Biomass Aerogels with Multifunctionality and Superelasticity Under Extreme Conditions

A Phosphorus-Nitrogen-Carbon Synergistic Nanolayered Flame Retardant for Polystyrene

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