Novel organic-inorganic hybrid polyphosphazene modified manganese hypophosphite shuttles towards the fire retardance and anti-dripping of PET

Li, Teng; Li, Shuai; Ma, Tongjun; Zhong, Yi; Zhang, Linping; Xu, Hong; Wang, Bijia; Feng, Xueling; Sui, Xiaofeng; Chen, Zhize; Mao, Zhiping

doi:10.1016/j.eurpolymj.2019.109270

Cited by 28 publications

(13 citation statements)

References 53 publications

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“…To determine the antibacterial activity of coated CT fabrics, the antibacterial activity of the uncoated and coated CT fabrics was evaluated by a direct contact method with Gram-positive ( Staphylococcus aureus ) bacteria in an agar medium to form inhibition diameters. 46,47 As shown in Figure 9, the coated CT fabric showed an efficient inhibition diameter against S. aureus compared to the uncoated CT fabric (diameter = 0 mm). The -NH 3 + in DL can adsorb anionic substances after penetrating the cell, thus killing the bacteria by interfering with the normal physiological activities of the cells.…”

Section: Resultsmentioning

confidence: 89%

Self-assembled bio-based coatings for flame-retardant and antibacterial polyester–cotton fabrics

Jiang

Zhu

et al. 2021

Textile Research Journal

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There are many defects in the post finishing flame-retardant modification of polyester–cotton (CT) fabric, leading to shortcomings such as single function and low flame-retardant efficiency, which still need to be solved urgently. Herein, a bio-based flame-retardant and antibacterial coating consisting of phytic acid and DL-arginine was deposited on CT fabrics using layer-by-layer assembly to obtain a flame-retardant and antibacterial CT fabric. Fourier transform infrared spectroscopy confirmed that the assembled coating was successful deposited on the CT fabric. The thermogravimetric analysis revealed that the number of bilayers had no significant effect on the degradation temperature of the coated CT fabric; however, it significantly improved the charring effect of the sample, wherein the char rate of the CT fabric coated with 20 bilayers increased from 0.11 to 8.67 wt% compared with uncoated CT fabric at 700°C. In addition, the limiting oxygen index of the CT fabric coated with 20 bilayers increased to 32.0 ± 0.3%. Furthermore, the vertical results revealed that the CT fabric coated with five bilayers attained the UL-94 V-1 grade. The heat release rate (HRR) and the total heat release (THR) of the coated CT fabric were significantly decreased compared to those of the uncoated CT fabric. In particular, the HRR and THR of the CT fabric coated with five bilayers reduced by 28.97% and 30.49%, respectively. Furthermore, the coated CT fabric exhibited an obvious antibacterial effect on Staphylococcus aureus, and the inhibitory ring increased from 0 to 4.0 mm with an increase in bilayers to 20. This study describes a facile method of flame-retardant and antibacterial modification of CT fabric using biological materials.

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Section: Resultsmentioning

confidence: 89%

Self-assembled bio-based coatings for flame-retardant and antibacterial polyester–cotton fabrics

Jiang

Zhu

et al. 2021

Textile Research Journal

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“…10,24,34 The stretching vibration peaks of hydrocarbon CH 2 or CH 3 groups at 2800-3150 cm À1 and the characteristic peaks of aromatic ring-containing compounds at 1670-1400 cm À1 can be observed in Figure 11(a) and (b). 35 As shown in Figure 11(b), these absorption peaks are comparable to the pyrolysis gas evolution of the pure EP, but the gas emission intensity is lower, indicating that the fire safety of the EP composites has been improved. The reduction of organic volatiles facilitated the improvement of the flame retardant properties of the composites.…”

Section: Gas-phase Analysismentioning

confidence: 75%

“…In general, two strongly peaked bands at approximately 1360 cm À1 (D band) and 1580 cm À1 (G band) in the Raman spectrum of the residual carbon of EP, 3% Salen-PZN-Ni@DHPP-PTS/EP and 5% Salen-PZN-Ni@DHPP-PTS/EP samples (Figure 12(d)-(f)) correspond to disordered and ordered graphitic structures. 35,36 The degree of graphitization of the residual carbon was evaluated by the area ratio (I D /I G ) of the D and G band intensities. Lower I D /I G values indicate a higher degree of the graphitization of the carbon.…”

Section: Residual Analysis Of Ep and Its Compositesmentioning

confidence: 99%

“…Furthermore, it is noticed that nitrogen was almost absent in the residual carbon, as well evidenced by the significantly lower peak at 400.8 eV in the N1s spectrum, indicating that nitrogen in Salen-PZN-Ni@DHPP-PTS microspheres is converted to both NH 3 and NO x forms during combustion, diluting the combustible gas and thus exerting a flame retardant effect in the gas phase. 35 For the C1s spectrum (Figure 13(b)), peaks at 284.7 eV for the presence of C-H and C-C bonds in aliphatic and aromatic compounds, 285.9 eV peaks assigned to C-O in ethers or hydroxyl groups, 287.2 eV peaks attributed to carbonyl groups, while another peak for 283.9 eV corresponds to the C-Si band. 36 For the P2p XPS spectrum (Figure 13(c)), the peaks at 134.1 eV and 135.5 eV are attributed to P-O and P=O, respectively, which may be caused by the presence of compounds such as pyrophosphate or polyphosphate in the residual carbon.…”

Section: Residual Analysis Of Ep and Its Compositesmentioning

confidence: 99%

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A novel flame retardant consisting of functionalized Salen-Ni based polyphosphazene microspheres

Cui

Zhang³

et al. 2022

High Performance Polymers

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A functionalized cross-linked polyphosphazenes microsphere (Salen-PZN-Ni@DHPP-PTS) was prepared by wrapping Salen-Ni basis polyphosphazenes (Salen-PZN-Ni) with a kind of hybrid flame retardant (DHPP-PTS) to improve the flame retardancy and smoke suppression properties of epoxy (EP) composites. Thermogravimetric analysis showed that the addition of Salen-PZN-Ni@DHPP-PTS greatly improved the thermal stability of the EP composites. The addition of 5 wt% Salen-PZN-Ni@DHPP-PTS remarkably improved the fire safety of EP, which was illustrated by the results of the cone calorimeter. For example, the peak heat release rate and total heat release rate of the EP composites were reduced by 44.2% and 33.1%, respectively. The limiting oxygen index value of 5% Salen-PZN-Ni@DHPP-PTS/EP composite reached 29.8% and UL-94 achieved V-1 rating. In addition, the introduction of Salen-PZN-Ni@DHPP-PTS effectively suppressed the production of toxic CO and other volatiles. Meantime, the synergistic effect between Salen-PZN-Ni and DHPP-PTS was found. The potential flame retardant mechanism of Salen-PZN-Ni@DHPP-PTS is regarded as the synergistic catalytic carbonization effect and the extremely thermally stable components forming. Enhanced fire safety of EP composites by synergistic interaction of various components (nickel and DHPP-PTS) with polyphosphazenes microspheres.

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“…The larger the size of the individual flame retardants, the higher the initial decomposition temperature (T 5 ; temperature at a mass loss of 5 wt%) and the temperature corresponding to the maximum mass loss rate (T max ). 15,36,37 Moreover, the larger the PZS diameter, the greater the amount of residual carbon at 800 C. The degradation of PET/PZSs is similar to that of PET, which indicates that the incorporation of PZS into PET does not alter the primary degradation process of the matrix. PET exhibits a high T 5 of 395 C and a T max of 433 C.…”

Section: Thermal Stability Analysismentioning

confidence: 95%

Effect of weak intermolecular interactions in micro/nanoscale polyphosphazenes and polyethylene terephthalate composites on flame retardancy

Zhu

et al. 2022

Polymers for Advanced Techs

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This study investigates the effects of weak intermolecular interactions on the flame retardancy of a poly(ethylene terephthalate) (PET) and polyphosphazene flame retardant. Monodispersed poly-(cyclotriphosphazene-co-4,4 0 -sulfonyldiphenol) (PZS) microspheres with different diameters were synthesized by controlling the reactant concentration. Simulation studies revealed that the weak intermolecular interactions between PZS and PET predominantly include strong hydrogen bonding and π-π interactions. The weak intermolecular interactions imparted high thermal stability, even in the molten state, and PZS microspheres with smaller diameters achieved stronger hydrogen bonds and π-π interactions with PET. The diameter of the PZS microspheres influenced the limiting oxygen index value and UL-94 rating. Increasing the carbon residue alone was insufficient to promote the flame retardancy, and the weak intermolecular interactions played an important role. Thus, stronger weak-intermolecular-interactions are beneficial for realizing a material with superior flame retardancy and anti-dropping performance.

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Novel organic-inorganic hybrid polyphosphazene modified manganese hypophosphite shuttles towards the fire retardance and anti-dripping of PET

Cited by 28 publications

References 53 publications

Self-assembled bio-based coatings for flame-retardant and antibacterial polyester–cotton fabrics

Self-assembled bio-based coatings for flame-retardant and antibacterial polyester–cotton fabrics

A novel flame retardant consisting of functionalized Salen-Ni based polyphosphazene microspheres

Effect of weak intermolecular interactions in micro/nanoscale polyphosphazenes and polyethylene terephthalate composites on flame retardancy

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