Mussel‐inspired decoration of Ni(OH)₂ nanosheets on 2D MoS₂ towards enhancing thermal and flame retardancy properties of poly(lactic acid)

Abstract

In the present work, a facile and environmental method was developed to fabricate the novel functionalized MoS2 hybrid. Firstly, MoS2 nanosheets were coated with polydopamine (PDA) through the self‐polymerization of dopamine (MoS2‐PDA) in a buffer solution. Then the decoration of Ni(OH)2 on the MoS2‐PDA was synthesized because of the strong affinity of Ni2+ with hydroxyl groups in PDA. Finally, the as‐synthesized MoS2‐PDA@Ni(OH)2 was introduced into poly(lactic acid) (PLA) matrix to explore flame retardancy, thermal stability, and crystalline property of the composites. As confirmed by X‐ray diffraction (XRD), Fourier‐transform infrared spectrometer (FTIR), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA), the MoS2 nanosheets were dually modified with PDA and Ni(OH)2 without destroying the original structures. The thermal degradation of PLA with MoS2‐PDA@Ni(OH)2 generated a notably higher yield of char. Moreover, the crystallization rate of composites is higher than neat PLA. The cone calorimeter test revealed that the introduction of 3% MoS2‐PDA@Ni(OH)2 resulted in lower Peak Heat Release Rate (PHRR) (decreased by 21.7%). Thus, the research provided an innovative functionalization method for manufacturing PLA composites with high performances.

Polydopamine decorated MoS2 nanosheet based electrochemical immunosensor for sensitive detection of SARS-CoV-2 nucleocapsid protein in clinical samples

“…19,24 MoS 2 NSs exhibited a 0.62 nm lattice spacing between layers, which is greater than that of graphene (0.335 nm), and later offered multifold improvement in the sensitivity of a biosensing platform. 25,26 Owing to the poor conductivity of MoS 2 NSs 27 and its fewer functionalities, 28 it would be an ideal approach to utilize the combination of other conducting nanomaterials such as noble metal nanoparticles, 29,30 transition metal oxides, [31][32][33] polymers, [34][35][36][37][38] metal-organic frameworks, 39 and porous coordination polymers 40 with MoS 2 NSs to prepare nanocomposites with enhanced conductivity.…”

Halogen-Free Flame Retarded Poly(Lactic Acid) with an Isosorbide-Derived Polyphosphonate

“…Except for the organic flame-retardants, various inorganic flame-retardants such as carbon-based materials [25][26][27][28], metal organic frameworks [29,30], silicates [31][32][33][34], black phosphorus [35], graphitic carbon nitride [36], molybdenum disulfide [37,38], have been utilized to enhance the anti-flammability of PLA. Compared to organic flame-retardants, inorganic anti-flammable agents are more efficient in decreasing the heat release and smoke emission at a relatively low dosage.…”

Zinc hydroxystannate dripped on magnesium hydroxide flower for enhancing smoke suppression and toxicity reduction properties of epoxy resin

“…It has been confirmed that the introduction of transition metal (Fe, Ni, Cu, Zn, etc.) compounds into EP can effectively improve its fire safety performance 16–18 . In addition, Sn compounds can reduce CO emissions during the combustion process and weaken the combustion toxicity of polymers 19 .…”