Design and preparation of poly(lactic acid) hydroxyapatite nanocomposites reinforced with phosphorus‐based organic additive: Thermal, combustion, and mechanical properties studies

Hajibeygi, Mohsen; Shafiei-Navid, Saeid

doi:10.1002/pat.4652

Cited by 19 publications

(10 citation statements)

References 53 publications

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“…Overall, the adding of micro-or nano-fillers to polymers and biopolymers leads to a significant increase of their rigidity, thermal-resistance, stability, barrier properties, and durability [29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46], although in some cases, the presence of the fillers can induce a reduction of some properties due to the development of inappropriate morphology. Besides, the introduction of naturally occurring fillers (nFil), such as nano-sized layered alumino-silicates (e.g., halloysite, bentonite, beidellite, sepiolite, montmorillonite, etc.…”

Section: Natural Fillers (Nfil)mentioning

confidence: 99%

“…Currently published study reports about the improvement of mechanical, thermal, and combustion resistance of polylactic acid (PLA) through adding of hydroxyapatite (HA) nanoparticles, previously modified phosphorus-based organic additive (PDA) [43]. Due to the adding of organomodified HA nanoparticles, the main mechanical properties, such as tensile strength (TS) and Young's modulus (YM), of nanocomposites increase, while, the ductility, i.e., the elongation at break Finally, the authors concluded that the addition of nHA results in significantly less marked decreases in tensile strength and strain to failure as a function of aging time than the unmodified films.…”

Section: Natural Hydroxyapatitementioning

confidence: 99%

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Natural Compounds as Sustainable Additives for Biopolymers

et al. 2020

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In the last few decades, the interest towards natural compounds, coming from a natural source and biodegradable, for biopolymers is always increasing because of a public request for the formulation of safe, eco-friendly, and sustainable materials. The main classes of natural compounds for biopolymers are: (i) naturally occurring fillers (nFil), such as nano-/micro- sized layered alumino-silicate: halloysite, bentonite, montmorillonite, hydroxyapatite, calcium carbonate, etc.; (ii) naturally occurring fibers (nFib), such as wood and vegetable fibers; (iii) naturally occurring antioxidant molecules (nAO), such as phenols, polyphenols, vitamins, and carotenoids. However, in this short review, the advantages and drawbacks, considering naturally occurring compounds as safe, eco-friendly, and sustainable additives for biopolymers, have been focused and discussed briefly, even taking into account the requests and needs of different application fields.

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Section: Natural Fillers (Nfil)mentioning

confidence: 99%

Section: Natural Hydroxyapatitementioning

confidence: 99%

Natural Compounds as Sustainable Additives for Biopolymers

et al. 2020

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“…In recent years, the improvement of flame retardancy without sacrificing the mechanical properties of PLA has been studied extensively by researchers 15,18–23 . Below is a summary of three major ways of enhancing mechanical properties of flame‐retardant PLA: Toughening agentsAdding the toughening agents, such as thermoplastic polyurethane elastomer (TPU), 24 polyethylene glycol (PEG), 25 castable polyurethane elastomer (CPU), 26 PA‐HDA (synthesized from phytic acid and 1,6‐hexanediamine), crosslinking polyurethane (CPU) 27 and plasticizer‐poly(propylene glycol) 28 to improve the mechanical property of PLA are the most common methods.…”

Section: Introductionmentioning

confidence: 99%

Construction of crosslinking network structures by addingZnOandADRin intumescent flame retardantPLAcomposites

Chen

et al. 2021

Polymers for Advanced Techs

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Different proportion of nano zinc oxide (nano ZnO) and chain extender (ADR) were combined with the intumescent flame retardant and then added into the PLA matrix. The thermal stability, flame retardant performance, and mechanical properties were studied. The gel content results showed that crosslinking structures were obtained after the addition of nano ZnO and ADR, which were generated by the catalytic chain scission effect of nano ZnO and chain extension effect of ADR. With addition of 1% nano ZnO and 1.6% ADR, the gel content of flame retardant PLA composite reached the highest value (14.2%). Meanwhile, the corresponding flame retardant PLA composite with 1% nano ZnO and 1.6% ADR, named FRPLA/ZnO/ADR‐1, exhibited an overall improved properties including the flame retardant properties and mechanical performance, which passed the UL94 V‐0 level with a limiting oxygen index value of 40.1%. Compared to FRPLA (flame retardant PLA without ZnO and ADR), the peak heat release rate and the total smoke production of FRPLA/ZnO/ADR‐1were reduced by 60% and 67% respectively, and the final mass improved from 12% to 38%. In addition, the tensile strength and elongation at break of FRPLA/ZnO/ADR‐1 increased by 25%, 14% compared with that of FRPLA. The impact strength was 15.1 kJ/m2, which is similar to the pure PLA (15.6 kJ/m2). It indicated that the addition of nano ZnO and ADR could balance the flame retardant performance and the mechanical properties of the flame retardant PLA.

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“…Polylactide (PLA), one of the commercial biodegradable polyesters, exhibits superior mechanical property, biodegradability, and easy processability . It has a variety of potential applications, such as packaging, fishery, electronics, and automobile components . However, the intrinsic poor thermal resistance and high combustibility of PLA restrict its further applications.…”

Section: Introductionmentioning

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

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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

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Design and preparation of poly(lactic acid) hydroxyapatite nanocomposites reinforced with phosphorus‐based organic additive: Thermal, combustion, and mechanical properties studies

Cited by 19 publications

References 53 publications

Natural Compounds as Sustainable Additives for Biopolymers

Natural Compounds as Sustainable Additives for Biopolymers

Construction of crosslinking network structures by addingZnOandADRin intumescent flame retardantPLAcomposites

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

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