Plasticization of poly(lactic acid) using different molecular weight of Poly(ethylene glycol)

Septevani, Athanasia Amanda; Bhakri, Samsul

doi:10.1063/1.5011895

Cited by 12 publications

(13 citation statements)

References 21 publications

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“…The intramolecular interaction of the hydrogen bonding occurs between oxygen attached to carbonyl (C=O) in PLA structure and hydroxyl (-OH) end group in the PEG molecular chain. The addition of lower M w (PEG 300) can raise chain mobility between PLA and PEG through hydrogen bonding (Septevani and Bhakri 2017). This is why PEG is a suitable plasticizer for PLA.…”

Section: Morphological Studymentioning

confidence: 99%

Improvement in mechanical properties and biodegradability of PLA using poly(ethylene glycol) and triacetin for antibacterial wound dressing applications

2020

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Wound is among the most common injuries. A suitable wound dressing has a significant effect on the healing process. In this study, a porous wound dressing was prepared using poly (lactic acid) (PLA) and two plasticizers, polyethylene glycol (PEG) and triacetin (TA), through solvent casting method. For antibacterial activities, metronidazole was incorporated in the structure. The morphology was investigated by scanning electron microscopy (SEM). In addition, the effect of plasticizers ratio on porosity growth was evaluated. It was also observed that each had a unique effect on the structure's porosity. The mechanical properties confirmed the effect of both plasticizers on increasing polymer softness and flexibility, and the most similar formulations to human skin in terms of mechanical properties were introduced. According to the results, TA had stronger effect on mechanical properties. The differential scanning calorimetry (DSC) showed the effect of increasing plasticizer concentration on crystalline structure and T m reduction of PLA. The water contact angle measurement showed that both plasticizers enhanced hydrophilic characteristics of PLA, and this effect was weaker in PEG-containing formulations. The in vitro degradation study showed biodegradability, as a desirable property in wound dressing. Results suggested that higher degradation can be obtained by both plasticizers at the same time. The results also showed that PEG was more effective in enhancing water absorbency. In vitro drug release study indicated an explosive release and the highest amount was 85% over 186 h. The antibacterial activity test confirmed the effectiveness of the drug in preventing bacterial growth in the drug-containing formulations, while it showed the antibacterial property of TA. MTT assay was performed and the cellular toxicity of the formulations was checked and those that revealed the least toxicity were introduced.

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Section: Morphological Studymentioning

confidence: 99%

Improvement in mechanical properties and biodegradability of PLA using poly(ethylene glycol) and triacetin for antibacterial wound dressing applications

2020

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“…The tensile analysis indicated that the addition of 10 to 30 wt% of plasticizer generally improved the extensibility and flexibility of PLA film. We observed that the addition of the TA and PEG plasticizers led to lower TS and higher E ab of the PLA films, most probably due to increasing mobility of polymer chains resulting in film flexibility (Courgneau et al, 2011;Ozdemir & Hacaloglu, 2017;Septevani & Bhakri, 2017).…”

Section: Tensile Propertiesmentioning

confidence: 85%

“…The residual mass in the neat PLA film was approximately 0.3% at 600°C that is lower than the plasticized PLA films. We can conclude that the improved thermal stability of the plasticized PLA films is probably due to the shielding effect of plasticizers that reduce the permeability of the decomposition products and thus could slow down the degradation process (Septevani & Bhakri, 2017).…”

Section: Thermal Propertiesmentioning

confidence: 92%

“…The absorption peak at 3,446 cm −1 is observed for the PEG plasticizer, which belongs to the hydroxyl groups (Nashchekina et al, 2020). Overall, there are negligible shifts in peak positions indicating insignificant chemical interactions between PLA and plasticizers (Chieng et al, 2014;Septevani & Bhakri, 2017).…”

Section: Ftir Analysismentioning

confidence: 96%

“…Figure 2 shows a schematic representation of the preparation procedure of the plasticized PLA films (Septevani & Bhakri, 2017;Yang et al, 2018).…”

Section: Film Preparationmentioning

confidence: 99%

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Preparation and characterization of the plasticized polylactic acid films produced by the solvent‐casting method for food packaging applications

YousefniaPasha

Mohtasebi

Tabatabaeekoloor

et al. 2021

J. Food Process. Preserv.

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A strategy to overcome the brittleness and rigidity of polylactic acid (PLA)-based materials for food packaging applications is adding a proper plasticizer in the right amount. Here, triacetin (TA) and polyethylene glycol (PEG) were used as plasticizers in different amounts (10, 20, and 30 wt%) to produce the plasticized PLA films by the solvent-casting method. Tensile properties, water vapor permeability (WVP), moisture content (MC), optical properties, Fourier transform infrared absorption (FTIR), and thermogravimetric analysis (TGA) are reported. The results showed that both TA and PEG cause increasing elongation at break (E ab ) and decreasing tensile strength (TS), where the plasticized PLA films containing 10 and 30 wt% of TA showed the highest TS (26.6 MPa) and E ab (81.1%), respectively. Light transmission of PLA was decreased by introducing the plasticizers, while WVP, MC, and opacity of the plasticized films were increased compared to the neat PLA. Among the plasticized films, the sample with 10 wt% of TA and PEG showed the lowest WVP (4.9 × 10 −10 g/m s −1 Pa −1 ) and MC (5.5%), respectively. Based on the TGA, an improvement in the thermal stability of TA and PEG plasticized films compared to the neat PLA was obvious. The sample containing 10 wt% of TA (PLA-TA10) showed the best performance for food packaging applications. Practical applicationsFood product packaging provides retarding deterioration, reducing microbial contamination, preserving safety, protecting quality, and extending the shelf life of packaged foods during transmission, storage, and consumption. Petroleum-based plastic and synthetic polymers have been mainly used in food packaging due to their cheap cost and good mechanical and barrier properties. However, increasing the use of these nonbiodegradable polymers causes serious environmental and health problems. The biopolymers which are extracted from biodegradable and renewable sources are considered as suitable alternatives for petroleum-based plastic materials.However, application of biopolymers as packaging materials has been limited due to their low mechanical properties and thermal stability. Many studies have been conducted to modify the properties of PLA-based packaging materials to create a favorable product for the food industry. Moreover, introducing plasticizer to PLA helps

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Antibacterial and cytotoxic performance of methenamine‐based poly(lactic acid)/poly(ethylene glycol) (PLA/PEG) composite films

Dandan Doganci,

Doganci,

Balci

et al. 2024

J of Applied Polymer Sci

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In this study, antimicrobial plasticized poly(lactic acid) (PLA) films by incorporating poly(ethylene glycol) (PEG) and methenamine (MA) were prepared by solvent casting method. We investigated the effects of different concentrations of MA on the antimicrobial properties against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) which were types of gram‐negative and gram‐positive bacteria in turn. It was determined that as the rate of MA in the PLA/PEG film enhanced, its antimicrobial activity against both bacteria also increased. As a result, the maximum inhibitory effect for E. coli was seen in MA5, MA8, and M10 films, and it reduced the bacterial population by 100%. In S. aureus, the high inhibition effect was seen in the MA8 film, and it reduced the bacterial population by 95%. Moreover, as the MA concentration increases, the thermal stability of PLA/PEG films increases and approaches the thermal decomposition temperature of neat PLA. The incorporation of 0.5% MA to this system caused a significant increase in elongation at break values. It is concluded that a minimum concentration of MA is sufficient for high flexibility compared with pure PLA. These MA containing PLA/PEG composite films have potential applications as biodegradable flexible packaging materials.

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Plasticization of poly(lactic acid) using different molecular weight of Poly(ethylene glycol)

Cited by 12 publications

References 21 publications

Improvement in mechanical properties and biodegradability of PLA using poly(ethylene glycol) and triacetin for antibacterial wound dressing applications

Improvement in mechanical properties and biodegradability of PLA using poly(ethylene glycol) and triacetin for antibacterial wound dressing applications

Preparation and characterization of the plasticized polylactic acid films produced by the solvent‐casting method for food packaging applications

Antibacterial and cytotoxic performance of methenamine‐based poly(lactic acid)/poly(ethylene glycol) (PLA/PEG) composite films

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