Synthesis of a furfural-based DOPO-containing co-curing agent for fire-safe epoxy resins

Xie, Wei-Qi; Huang, Shi‐Wen; Tang, Donglin; Liu, Shumei; Zhao, Jianqing

doi:10.1039/c9ra06425g

Cited by 40 publications

(20 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Meanwhile, the DOPO will migrate to the surface of the composites during the combustion due to the low melting point of DOPO (116°C). The degradation of DOPO will release PH 3 , which could be further oxidized in to phosphoric acid which can promote the carbonization of PLA composites . The phosphorus‐rich protective char layer with enhanced stability and graphitization, which can prevent the transfer of heat and organic volatiles, thereby improving the flame retardancy of PLA composites …”

Section: Resultsmentioning

confidence: 99%

Synergistic effect of flame retardants and graphitic carbon nitride on flame retardancy of polylactide composites

Cao

Chi

Deng

et al. 2020

Polymers for Advanced Techs

View full text Add to dashboard Cite

In order to improve the flame retardant of polylactide (PLA), the synergistic effect of graphitic carbon nitride (g-C 3 N 4 ) with commercial-available flame retardants melamine pyrophosphate (MPP) and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) was investigated. The PLA composites containing 5 wt% g-C 3 N 4 and 10 wt% DOPO had a highest limited oxygen index (LOI) value of 29.5% and reached the V-0 rating of UL-94 test. The cone calorimeter tests exhibited that DOPO had a better synergistic effect with g-C 3 N 4 than MPP to improve flame retardancy of PLA. The peak heat release rate (pHRR) and total heat release (THR) of PLA composites containing 10 wt% DOPO could be reduced by 25.2% and 23.6%, respectively, as compared with those of pure PLA. The presence of rich phosphorus element and aromatic groups in DOPO contributed to obtain continuous compact char layer and increase the graphitization level of char residues, thereby, resulting in improving the flame retardancy of PLA together with g-C 3 N 4 . In addition, the incorporation of DOPO can serve as a plasticizer to reduce the complex viscosity, improving the processability of PLA composites. K E Y W O R D S flame retardancy, graphitic carbon nitride, polylactide 1 | INTRODUCTION Bio-based and biodegradable polymers have received considerable attention during the last decade due to the growing environmental pollution and the shortage of petroleum resources. Polylactide (PLA),one of the commercial biodegradable polyesters, exhibits superior mechanical property, biodegradability, and easy processability. 1,2 It has a variety of potential applications, such as packaging, fishery, electronics, and automobile components. 3-5 However, the intrinsic poor thermal resistance and high combustibility of PLA restrict its further applications. To address the aforementioned challenges, many researches have demonstrated that the incorporation of twodimensional nanofiller is a simple and effective way to enhance thermal stability and flame retardant performance of PLA. It is widely acknowledged that the combination of the dispersed two-dimensional nanofiller with additive-type flame retardants can dramatically inhibit the oxidation reactions and/or pyrolytic reactions during the combustion. Tawaih et al reported that the peak heat release rate (pHRR) and total heat release (THR) of PLA composites could be reduced by 76.5% and 76.9%, respectively, with 2 wt% of sodium metaborate

show abstract

Section: Resultsmentioning

confidence: 99%

Synergistic effect of flame retardants and graphitic carbon nitride on flame retardancy of polylactide composites

Cao

Chi

Deng

et al. 2020

Polymers for Advanced Techs

View full text Add to dashboard Cite

show abstract

“…This situation can be attributed to the early degradation of phosphorus monomers, which is well-known in the literature. [49][50][51][52] The second maximum weight loss temperatures (T max2 ) were first increased with the introduction of the PTA, and then decreased with increasing amount of PTA. The PS encoded formulation, which is composed of only PTA and 4SH displayed the lowest degradation temperatures.…”

Section: Thermal Propertiesmentioning

confidence: 99%

Acetylene Dicarboxylic Acid Diallyl Ester: A Versatile Monomer for Thiol–Ene Photocured Networks

Dağlar

Çakmakçı

Gunay

et al. 2021

Macro Materials & Eng

View full text Add to dashboard Cite

Thiol-ene photopolymerization (TEP) is a highly advantageous method for the curing of unsaturated monomers, and the design of novel monomers to be used in TEP is an active area of research. The feasibility and the versatility of novel acetylene dicarboxylic acid diallyl ester (ACDAE)-based monomers are synthesized and demonstrated. The electron deficient acetylenic core in ACDAE allows to apply three different click reactions, aza-Michael, thio-Michael, and metal-free azide-alkyne cycloaddition reactions, efficiently on it. Thus, three novel allylic monomers are synthesized and are used to prepare thiol-ene photopolymerized networks. All monomers are synthesized in good yields and structurally characterized by 1 H NMR and Fourier-transform infrared spectroscopy (FTIR) measurements. Thermal, thermomechanical, and mechanical properties, flame retardancy, transmittance, and the wettability of the networks are determined.

show abstract

“…For thermosetting hard resin, epoxy oxide requires the addition of curing agents to repair the damage (Gholipour-Mahmoudalilou et al, 2018;Gao et al, 2020;Seidi et al, 2020). The mechanical properties exhibit differently depending on the types of curing agents (Haddadi et al, 2019;Xie et al, 2020). The combination of epoxy oxide, microcapsules, graphene oxide, and 4D printing can be formed as a sort of self-healing material with high tensile strength and stable properties, showing a great potential for application in biology, medicine, and bionics.…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide-Modified Microcapsule Self-Healing System for 4D Printing

Zhang

Wei

et al. 2021

Front. Mater.

View full text Add to dashboard Cite

Self-healing materials as a type of promising smart materials are gradually applied to electronics, biology, and engineering. In this study, we used in situ polymerization to make melamine-formaldehyde (MF) resin microcapsules to wrap the epoxy oxide as a repairing agent and Cu(MI)4Br2 as a latent-curing agent to protect epoxy oxide E-51 from broken melamine-formaldehyde resin microcapsules. In addition, graphene oxide was used as a reinforcing phase through its two-dimensional-layered structure to increase the tensile strength to 41.91 MPa, which is higher than the initial materials. The melamine-formaldehyde capsules and latent-curing agents were uniformly distributed in the materials according to the digital photos and scanning electron microscope (SEM) pictures. It is worth noting that the mechanical strength of the broken materials can be restored to 35.65 MPa after heating to 130°C for 2 h to repair the damage, and the self-healing efficiency reached up to 85.06%. Furthermore, we also fabricated the 4D printed material with a tensile strength of 50.93 MPa through a 3D printer. The obtained materials showed excellent repair effect, with a recovery rate of up to 87.22%. This study confirms that the designed self-healing system has potential applications in many areas due to its excellent self-healing performance, which provides valuable guidance for designing the 4D system.

show abstract

Synthesis of a furfural-based DOPO-containing co-curing agent for fire-safe epoxy resins

Abstract: A novel furfural-based DOPO-containing flame retardant MBF-DOPO was successfully synthesized and acted as a co-curing agent for fire-safe epoxy resins.

Cited by 40 publications

References 31 publications

Synergistic effect of flame retardants and graphitic carbon nitride on flame retardancy of polylactide composites

Synergistic effect of flame retardants and graphitic carbon nitride on flame retardancy of polylactide composites

Acetylene Dicarboxylic Acid Diallyl Ester: A Versatile Monomer for Thiol–Ene Photocured Networks

Graphene Oxide-Modified Microcapsule Self-Healing System for 4D Printing

Contact Info

Product

Resources

About