DOPO-Decorated Two-Dimensional MXene Nanosheets for Flame-Retardant, Ultraviolet-Protective, and Reinforced Polylactide Composites

Abstract

This study presents a novel and facile strategy for fabricating fire-resistant, ultraviolet (UV)-shielding, and tensileenhanced polylactide (PLA) composites using two-dimensional (2D) MXene (Ti 3 C 2 ) flakes chemically modified with 9,10dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO). The thermal and burning performances of PLA composites were demonstrated by the limiting oxygen index, UL-94 test, and cone calorimetry. The UV-shielding and tensile performances were also examined. The results revealed that PLA/Ti 3 C 2 −DOPO (3 wt %) displayed a V-0 rating in the UL-94 test. The enhancement against fire hazard was reflected by the significant reduction in the peak heat release rate (33.7%), total heat release (47%), peak CO production (58.8%), and total smoke production (41.7%). The improved fire-safety performance of the composites is attributed to the interplay of catalytic, barrier, and condensed effects of the Ti 3 C 2 −DOPO nanosheets in the PLA matrix. PLA/Ti 3 C 2 −DOPO also showed an increase (∼9%) in tensile strength and an "Excellent" level (UPF 50+) in the UV-protection assessment. In all, this study introduces a novel chemical modification strategy for 2D MXene flakes to fabricate multifunctional PLA composites, which are promising candidates for next-generation sustainable and protective plastic products.

Flame retardancy of biodegradable polylactic acid with piperazine pyrophosphate and melamine cyanurate as flame retardant

“…When the addition of these high-performance flame retardants was lower than 5%, the prepared PLA composite reached the UL-94 V-0 level. [65][66][67][68] However, unlike other flame-retardant polymer composites such as polypropylene and polyethylene composites, most of the reported flame-retardant PLA composite showed obvious melt dripping phenomenon. To some extent, the melt dripping of PLA composite can directly affect the UL-94 test result of the PLA composite.…”

Chitosan–Fe(III) Complexes via Green Preparation toward Flame Retardant and High-Mechanical-Strength Epoxy Composites

“…At present, adding flame retardants is considered one of the most common and effective ways to suppress the fire hazards of EP . In recent years, many kinds of flame retardants have been designed to endow EP with flame retardancy. − However, most flame retardants have cumbersome synthesis routes, with the main raw materials coming from nonrenewable petrochemicals, and require large amounts of organic solvents to synthesize flame retardants. Therefore, the development of synthesis processes for simple and sustainable flame retardants has become a hot topic.…”

Column-to-Beam Architecture Inspires Interface-Engineered MXene Nanosheet/Boron Nitride Nanosheet/Polydopamine Hybrids for Fire Retardants

“…MXene shows remarkable effectiveness as a multifunctional additive with fascinating physical and chemical properties, which has potential applications in the fields of electromagnetic shielding, smart sensors, catalysis, etc. At the same time, some scholars have gradually paid attention to the thermal stability, high specific surface area, and metal catalytic activity of MXene and believe that it has potential to become an effective flame-retardant filler, which is also conducive to the development of high-performance polymer composites. − Gong et al showed that incorporating 1% MXene into the EP matrix can reduce the peak heat release rate (PHRR) and peak smoke release (PSPR) rate of EP by 24.1 and 34.6%, respectively. Meng et al found that phytic acid-modified MXene (P-MXene) would endow EP with a 38.6% and 31.6% drop in PHRR and PSPR, respectively.…”