Evaluation of some eco‐friendly plasticizers for<scp>PLA</scp>films processing

Darie-Niță, Raluca Nicoleta; Vasile, Cornelia; Irimia, Anamaria; Lipşa, Rodica; Râpă, Maria

doi:10.1002/app.43223

Cited by 111 publications

(95 citation statements)

References 30 publications

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“…In comparison with neat PLA, the plasticized blends and bionanocomposites show T g at lower temperatures. This suggests that the segmental mobility of amorphous pure PLA increases due to the addition of plasticizers [33] and by incorporation of ZnO:Cu/Ag NPs a slight increase in T g can be noticed in comparison with plasticized PLA (PLA/ZnO:Cu/Ag 0). Plasticized PLA and PLA bionanocomposites exhibit the cold crystallization temperature (T cc ) at lower values (95.4-99.1°C) than neat PLA (119.2°C), these low values of Tcc favor the crystallization process.…”

Section: Differential Scanning Calorimetry (Dsc)mentioning

confidence: 93%

New PLA/ZnO:Cu/Ag bionanocomposites for food packaging

Vasile¹,

Râpă²,

Ştefan³

et al. 2017

Express Polym. Lett.

102

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Section: Differential Scanning Calorimetry (Dsc)mentioning

confidence: 93%

New PLA/ZnO:Cu/Ag bionanocomposites for food packaging

Vasile¹,

Râpă²,

Ştefan³

et al. 2017

Express Polym. Lett.

102

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“…In this regard, we have previously succeeded in melt electrospinning of PLA into ultrafine fibers with a custom‐built device, by incorporating polyethylene glycol (PEG) as a viscosity reducing agent . It is notable that PEG, which is a hydrophilic semicrystalline and biodegradable polymer, is considered an effective plasticizer for PLA‐based systems . PLA/PEG blends with improved cell affinity, biodegradability as well as physical and mechanical properties are good candidates for both industrial and biomedical applications.…”

Section: Introductionmentioning

confidence: 99%

The effects of processing parameters on the morphology of PLA/PEG melt electrospun fibers

Nazari

Garmabi

2017

Polymer International

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Electrospinning of a polymer melt is an ideal technique to produce highly porous nanofibrous or microfibrous scaffolds appropriate for biomedical applications. In recent decades, melt electrospinning has been known as an eco‐friendly procedure as it eliminates the cytotoxic effects of the solvents used in solution electrospinning. In this work, the effects of spinning conditions such as temperature, applied voltage, nozzle to collector distance and collector type as well as polyethylene glycol (PEG) concentration on the diameter of melt electrospun polylactic acid (PLA)/PEG fibers were studied. The thermal stability of PLA/PEG blends was monitored through TGA and rheometry. Morphological investigations were carried out via optical and scanning electron microscopy. Based on the results, blends were almost stable over the temperature range of melt electrospinning (170 − 230 °C) and a short spinning time of 5 min. To obtain non‐woven meshes with uniform fiber morphologies, experimental parameters were optimized using ANOVA. While increasing the temperature, applied voltage and PEG content resulted in thinner fibers, PEG concentration was the most influential factor on the fiber diameter. In addition, a nozzle to collector distance of 10 cm was found to be the most suitable for preparing uniform non‐woven PLA/PEG meshes. At higher PEG concentrations, alterations in the collector distance did not affect the uniformity of fibers, although at lower distances vigorous bending instabilities due to polarity augmentation and viscosity reduction resulted in curly fibrous meshes. Finally, the finest and submicron scale fibers were obtained through melt electrospinning of PLA/PEG (70/30) blend collected on a metallic frame. © 2017 Society of Chemical Industry

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“…When comparing various plasticisers for PLA, USE was selected because it significantly increased this property. 41 Although elongation at the point of break significantly increased with USE addition and decreased when the other components are incorporated, particularly HC, it is still higher for all studied systems in comparison with the value of PLA ( Figure 1(c)). The compatibiliser PL and vitamin E improve this property, but it decreased again with silver NP incorporation.…”

Section: Mechanical Behaviourmentioning

confidence: 81%

“…[36][37][38][39][40] In this study USE was selected because it significantly improved elongation at the point of break in comparison with those of other plasticisers had been recorded. 41 Soybean oil contains 10 wt% palmitic acid, 25 wt% oleic acid, 51 wt% linoleic acid and 7 wt% linolenic acid. Unsaturated groups can be used for functionalisation.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Complex poly(lactic acid)-based biomaterial for urinary catheters: I. Influence of AgNP on properties

Raluca¹,

Bogdán

TudorachiNiţă³

et al. 2016

Bioinspired, Biomimetic and Nanobiomaterials

Self Cite

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The present study focused on the development of biocompatible antimicrobial/antioxidant biodegradable bionanocomposite renewable resources based on poly(lactic acid) (PLA) plasticised with epoxidised soybean oil. To the main PLA matrix hydrolysed collagen (HC) (to enhance biocompatibility), vitamin E (as antioxidant agent) and silver (Ag) nanoparticles (NPs) (for imparting antimicrobial properties for medical applications and also for active packaging) were incorporated. The blends were produced by using the classical technological flow of melt processing.The presence of the additives in the PLA matrix improved the processability and flexibility and slightly decreased the thermal properties. The specific interactions of silver NPs with the other components of nanocomposites, mainly with HC protein and vitamin E (by ionic and other types of secondary bonds), led to a better HC and vitamin E dispersion in the samples with a higher silver content (1·5%), which further caused the enhancement of the mechanical properties for high silver NP concentration. Therefore, the silver NPs were successfully embedded into the polymer matrix. The aim of this research was to improve the flexibility, biocompatibility and functionality of PLA and to obtain bionanocomposites destined for medical applications such as catheters. This first part of research deals with mechanical and thermal characterisation correlated with morphological features. Notation d 2 dimension coefficient according with Avrami-Erofeev model E 1 ,E 2 activation energies for each step n dimensional nucleation Avrami-Erofeev reaction model n 1 ,n 2 reaction orders R correlation coefficient s thermal process in one step T 10 temperature corresponding to 10 wt% mass loss T 50 temperature corresponding to 50 wt% mass loss T cc cold crystallization temperature T g glass transition temperature T m melting temperature T onset onset temperature of each thermogravimetric step TQ 1min torque after 1 min of melt processing TQ 5min torque after 5 min of melt processing TQ fin torque at end of melt processing TQ max maximum torque value on the torque-time curve W mass loss for each thermogravimetric stage W r,500°C residual mass loss DC p specific heat capacity DH cc cold crystallization enthalpy DH m melting enthalpy

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Evaluation of some eco‐friendly plasticizers forPLAfilms processing

Cited by 111 publications

References 30 publications

New PLA/ZnO:Cu/Ag bionanocomposites for food packaging

New PLA/ZnO:Cu/Ag bionanocomposites for food packaging

The effects of processing parameters on the morphology of PLA/PEG melt electrospun fibers

Complex poly(lactic acid)-based biomaterial for urinary catheters: I. Influence of AgNP on properties

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