Simultaneously enhancing the crystallization rate and fire retardancy of poly(lactic acid) by using a novel bifunctional additive trimethylamine phenylphosphonate

Jin, Qiong‐Hua; Tian, Guangjin; He, Rong; Gu, Hai-Long; Wu, Fang; Zhu, Jiang

doi:10.1039/d1ra02862f

Cited by 12 publications

(4 citation statements)

References 53 publications

(69 reference statements)

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“…The PLA/BF-FeP composite showed no change in TSP. Studies are reported in the literature detecting an increase in TSP when phenyl phosphonate FRs are used due to the production of phosphorus free radicals acting in the gas phase. − The efficacy of the developed FR coating is noteworthy, given its low loading on the fiber surface, as it successfully mitigated smoke production without compromising its FR capabilities. Consistent with the TGA and MP-AES results, the low FR loading on the fibers does not lead to an appreciable decrease in the mass loss attributable to char production.…”

Section: Results and Discussionmentioning

confidence: 99%

Facile and Bioinspired Approach from Gallic Acid for the Synthesis of Biobased Flame Retardant Coatings of Basalt Fibers

Pantaleoni,

Sarasini,

Russo

et al. 2024

ACS Omega

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A sustainable, bioinspired approach to functionalize basalt fibers with an innovative gallic acid (GA)-iron phenyl phosphonate complex (BF-GA-FeP), for the purpose of improving the flame retardancy in composite materials, is developed. BFs were at first pretreated with O 3 , obtaining surface free hydroxyl groups that allowed the subsequent covalent immobilization of biosourced GA units on the fiber through ester linkages. Phenolic −OH groups of the GA units were then exploited for the complexation of iron phenyl phosphonate, resulting in the targetcomplex-coated BF fiber (BF-GA-FeP). Microwave plasma atomic emission spectroscopy and scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy analyses of BF-GA-FeP highlighted an increase in iron content, modification of fiber morphology, and occurrence of phosphorus, respectively. BFs, modified with a low amount of the developed complex, were used to reinforce a poly(lactic acid) (PLA) matrix in the production of a biocomposite (PLA/BF-FeP). PLA/BF-FeP showed a higher thermal stability than neat PLA and PLA reinforced with untreated BFs (PLA/BF), as confirmed by thermogravimetric analysis. The cone calorimeter test highlighted several advantages for PLA/BF-FeP, including a prolonged time to ignition, a reduced time to flame out, an 8% decrease in the peak heat release rate, and a 15% reduced fire propagating index compared to PLA/BF.

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Section: Results and Discussionmentioning

confidence: 99%

Facile and Bioinspired Approach from Gallic Acid for the Synthesis of Biobased Flame Retardant Coatings of Basalt Fibers

Pantaleoni,

Sarasini,

Russo

et al. 2024

ACS Omega

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“…However, esters work by reducing the prevalence of hydroxyl and carboxyl end groups within the chain through esterification with PLLA. 19 This process provides the additional benefit of inducing a plasticizing effect from the resultant byproducts, thereby promoting a more regular organization of the chain segments. 20 Another extensively studied category of organic NAs includes amides and hydrazides.…”

Section: Introductionmentioning

confidence: 99%

“…Qiu and Li blended orotic acid with PLLA and significantly improved PLLA’s crystallization kinetics. However, esters work by reducing the prevalence of hydroxyl and carboxyl end groups within the chain through esterification with PLLA . This process provides the additional benefit of inducing a plasticizing effect from the resultant byproducts, thereby promoting a more regular organization of the chain segments .…”

Section: Introductionmentioning

confidence: 99%

Development of a Biomass Furan-Hydrazide Nucleating Agent of Poly(l-lactide) and Its Application for Biaxial-Oriented Films with Enhanced Performance

Jiao,

Cheng,

Song

et al. 2023

ACS Appl. Polym. Mater.

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The application of poly(l-lactide) (PLLA) is constrained by its inherently slow crystallization rate, resulting in limited heat resistance. The incorporation of nucleating agents (NAs) presents a promising solution to promote PLLA’s crystallization. In this study, we successfully utilized furan-based biomass feedstock to develop an organic NA, N′1,N′10-di(furan-2-carbonyl) decanedihydrazide (DFDH), for PLLA. Impressively, even with a minimal addition of 0.1% of DFDH, it had a profound impact on PLLA crystallization, yielding a crystallization temperature of 124.3 °C and a crystallinity of 42.7%. Furthermore, the isothermal crystallization time of the PLLA compounds consistently decreased, and both crystallization temperature and degree of crystallization increased with the additive amount. Through a combination of temperature-dependent Fourier-transform infrared analysis and molecular docking calculations, it is elucidated that DFDH directs PLLA chains toward the optimal gt conformation via dipole–dipole interactions with the carbonyl group of PLLA while maintaining chain spacing aligned with the cell constant of the α-crystalline structure. This mechanistic insight offers valuable clarity on nucleation regulation. Additionally, after the synchronized biaxial stretching of PLLA containing 0.3% DFDH, notable improvements were observed in the toughness and optical properties of PLLA films, especially at lower stretching rates. These findings not only hold theoretical significance for the development of biobased PLLA nucleating agents but also present practical promise for their application in biaxial stretching processes.

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“…Based on previous research, [19][20][21] the flame retardant containing P C and P O structures possessed flame retardancy for PLA. Xu et al 22 prepared a DOPO-based flame retardant DOPO-NH 2 containing P C and P O groups.…”

Section: Introductionmentioning

confidence: 99%

A monomolecular organophosphate for enhancing the flame retardancy, thermostability and crystallization properties of polylactic acid

Liu

Yan

Zhang

et al. 2022

J of Applied Polymer Sci

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Polylactic acid (PLA) is regarded as one of the most promising bioplastics. However, its inherent high flammability of PLA seriously limits its application in the emerging fields. Although the traditional phosphate flame retardants showed excellent flame retardant efficiency in PLA, they often failed to meet the processing requirements of PLA and the thermal stability of PLA composites was decreased after their addition. Herein, an organophosphate flame retardant pentaerythritol bis(phenyl phosphonate) (PBPP) with high thermal stability and phosphorus content was synthesized by the nucleophilic substitution reaction in our laboratory. The introduction of PBPP simultaneously improved the flame retardancy, thermostability and crystallization properties of PLA. Only 3 wt% PBPP endowed PLA composites with UL‐94 V‐0 grade and higher LOI of 28.3% due to its excellent gas phase effect. Moreover, the crystallinity of PLA/PBPP4 was enhanced from 14.2% of PLA to 32.2% with the improvement of 127%. Because of the similar structure and good compatibility between organophosphate flame retardant and PLA matrix, flame retardant PLA/PBPP maintained almost the same strength as neat PLA. This study provided a novel way for the preparation of a high‐performance flame retardant PLA composites with excellent comprehensive properties and it was important to expand the application value of multifunctional PLA materials.

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Simultaneously enhancing the crystallization rate and fire retardancy of poly(lactic acid) by using a novel bifunctional additive trimethylamine phenylphosphonate

Abstract: Simultaneously regulating the crystallizing and combustion behaviors of poly(lactic acid) (PLA) will be conducive to its further development in the fields of electronic appliances, automotive and rail transit materials.

Cited by 12 publications

References 53 publications

Facile and Bioinspired Approach from Gallic Acid for the Synthesis of Biobased Flame Retardant Coatings of Basalt Fibers

Facile and Bioinspired Approach from Gallic Acid for the Synthesis of Biobased Flame Retardant Coatings of Basalt Fibers

Development of a Biomass Furan-Hydrazide Nucleating Agent of Poly(l-lactide) and Its Application for Biaxial-Oriented Films with Enhanced Performance

A monomolecular organophosphate for enhancing the flame retardancy, thermostability and crystallization properties of polylactic acid

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