Growth of biobased flakes on the surface and within interlayer of metakaolinite to enhance the fire safety and mechanical properties of intumescent flame-retardant polyurea composites

Sun, Weifu; Sun, Yaru

doi:10.1016/j.cej.2022.138350

Cited by 26 publications

(7 citation statements)

References 83 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[84][85][86][87] The high phosphorus content and catalyzing effect enable PA to be an environmentally friendly fire retardant. [88][89][90][91] Recently, PA has been widely utilized to react with amines and MEL to prepare P-N fire retardants based on ionic interactions. [92][93][94] For example, Zhang et al [95] synthesized a phytic acid-based fire-retardant coating (AMPA) based on ionic interactions between pamino-benzene sulfonic acid and MEL followed by a reaction with PA (Figure 12A).…”

Section: Supramolecular Fire-retardant Aggregates Based On Ionic Inte...mentioning

confidence: 99%

Fire‐retardant and high‐strength polymeric materials enabled by supramolecular aggregates

Liu,

Zhu,

Feng

et al. 2024

Aggregate

View full text Add to dashboard Cite

High‐performance polymers have proliferated in modern society across a variety of industries because of their low density, good chemical stability, and superior mechanical properties. However, while polymers are widely applied, frequent fire disasters induced by their intrinsic flammability have caused massive impacts on human beings, the economy, and the environment. Supramolecular chemistry has recently been intensively researched to provide fire retardancy for polymers via the physical barrier and char‐catalyzing effects of supramolecular aggregates. In parallel, the noncovalent interactions between supramolecular and polymer chains, such as hydrogen bonding, π–π interactions, metal–ligand coordination, and synergistic interactions, can endow the matrix with enhanced mechanical strength. This makes it possible to integrate physical–chemical properties and noncovalent interactions into one supramolecular aggregate‐based high‐performance polymeric system on demand. However, fulfilling these promises needs more research. Here, we provide an overview of the latest research advances of fire‐retardant and high‐strength polymer materials based on supramolecular structures and interactions of aggregates. This work reviews their conceptual design, characterization, modification principles, performances, applications, and mechanisms. Finally, development challenges and perspectives on future research are also discussed.

show abstract

Section: Supramolecular Fire-retardant Aggregates Based On Ionic Inte...mentioning

confidence: 99%

Fire‐retardant and high‐strength polymeric materials enabled by supramolecular aggregates

Liu,

Zhu,

Feng

et al. 2024

Aggregate

View full text Add to dashboard Cite

show abstract

“…The surface of Si 3 N 4 modified by PA-MEL changed from smooth and porous to rough, but the crystal structure remained unchanged ( Figure 7 a). Metakaolinite also uses this idea [ 72 ]. Due to the abundant hydroxyl groups on the surface and between layers of metakaolinite, PA was introduced based on hydrogen bonding.…”

Section: Synthesis Of Supramolecular Flame Retardantsmentioning

confidence: 99%

Synthesis and Applications of Supramolecular Flame Retardants: A Review

et al. 2023

View full text Add to dashboard Cite

The development of different efficient flame retardants (FRs) to improve the fire safety of polymers has been a hot research topic. As the concept of green sustainability has gradually been raised to the attention of the whole world, it has even dominated the research direction of all walks of life. Therefore, there is an urgent calling to explore the green and simple preparation methods of FRs. The development of supramolecular chemistry in the field of flame retardancy is expanding gradually. It is worth noting that the synthesis of supramolecular flame retardants (SFRs) based on non-covalent bonds is in line with the current concepts of environmental protection and multi-functionality. This paper introduces the types of SFRs with different dimensions. SFRs were applied to typical polymers to improve their flame retardancy. The influence on mechanical properties and other material properties under the premise of flame retardancy was also summarized.

show abstract

“…Unfortunately, the release of large amounts of heat and toxic gases in the PUA matrix during combustion limits its application. [3,4] In general, regarding the flame retardancy and insulating properties of most kinds of polymers, the simplest and most economical method is to incorporate conductive/flame retardant fillers into the polymer matrix. [5] As one of the most common conductive polymers, polyaniline (PANI) is used in a wide range of applications such as sensors and EMI shielding.…”

Section: Introductionmentioning

confidence: 99%

“…[6,7] The polymeric structure of PANI and the abundance of amine and imide groups on the backbone provide the basis for good compatibility with polymers. In addition, the abundant benzene ring and nitrogen element in PANI favors the production of carbonaceous components and the release of noncombustible gases such as NH 3 . This provides a theoretical basis for PANI as char source to play a flame-retardant role in the condensed phase and gas diluent in the gas phase.…”

Section: Introductionmentioning

confidence: 99%

Hollow Superstructure In Situ Assembled by Single‐Layer Janus Nanospheres toward Electromagnetic Shielding Flame‐Retardant Polyurea Composites

Bi,

Song,

Pan

et al. 2023

Small

View full text Add to dashboard Cite

A dodecahedral superstructure consisting of a single layer of Janus spheres containing ZIF‐67 nanodots is prepared by in situ polymerization, with ZIF‐67 and bio‐based phytic acid (PA) as templates and dopants. It is used to improve the flame retardant, electromagnetic (EMI) shielding, and thermal conductivity properties of polyurea (PUA). By adding 5 wt% polyaniline@cobalt phytate‐2.0 (PANI@Co‐PA‐2.0), the peak of heat release rate and the peak of smoke production rate are reduced by 54.9 and 59.9%, respectively. The peak of CO and CO2 production also decreased by 46.2 and 53.1%, respectively. A decrease in the absorption intensity of aliphatic and aromatic volatiles is also observed. The fire safety of PUA is greatly improved. In addition, PUA/PANI@Co‐PA‐2.0 exhibits an EMI shielding capability of 22.4 dB with the help of reduced graphene oxide, which confirms the possibility of PUA material application in the field of electromagnetic shielding. The 5 wt% filler increases the tensile strength of the PUA matrix to 6.3 MPa, and the composite material obtains good thermal conductivity. This work provides a viable method for the preparation of a flame‐retardant, conductive, and electromagnetic refractory PUA substrate.

show abstract

Growth of biobased flakes on the surface and within interlayer of metakaolinite to enhance the fire safety and mechanical properties of intumescent flame-retardant polyurea composites

Cited by 26 publications

References 83 publications

Fire‐retardant and high‐strength polymeric materials enabled by supramolecular aggregates

Fire‐retardant and high‐strength polymeric materials enabled by supramolecular aggregates

Synthesis and Applications of Supramolecular Flame Retardants: A Review

Hollow Superstructure In Situ Assembled by Single‐Layer Janus Nanospheres toward Electromagnetic Shielding Flame‐Retardant Polyurea Composites

Contact Info

Product

Resources

About