Influence of chitosan on mechanical, thermal, barrier and antimicrobial properties of PLA-biocomposites for food packaging

Râpă, Maria; Miteluţ, Amalia Carmen; Popa, Elisabeta Elena; Grosu, Elena; Popescu, Paul Alexandru; Popa, Mona Elena; Rosnes, Jan Thomas; Sivertsvik, Morten; Darie-Niță, Raluca Nicoleta; Vasile, Cornelia

doi:10.1016/j.compositesb.2016.07.016

Cited by 119 publications

(55 citation statements)

References 36 publications

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“…This shift could be related to interactions between the hydroxyl groups in P3HB and the epoxy groups in EFAE and maleic anhydride in MLO as other authors have reported for similar plasticized systems . This decrease in the wavenumber was also observed by Râpă et al after the addition of different plasticizers, i.e., ATBC, TEC, and TBC in P3HB formulations. Silverajah et al also observed a decrease in the position of the peak corresponding to the stretching vibrations of crystalline carbonyl groups in PLA plasticized with 1 wt% and 5 wt% EPO.…”

Section: Resultssupporting

confidence: 79%

Improvement of Mechanical Ductile Properties of Poly(3-hydroxybutyrate) by Using Vegetable Oil Derivatives

Garcia‐Garcia

Fenollar

Fombuena

et al. 2016

Macromol. Mater. Eng.

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Poly(3‐hydroxybutyrate), P3HB is a thermoplastic polyester synthesized from bacterial fermentation with potential uses in packaging due to its biodegradability. Nevertheless, P3HB is a fragile material and its processing temperature window is very narrow which restricts its use. This study explores the potential of vegetable oil‐derived plasticizers, i.e., maleinized linseed oil (MLO) and an epoxidized fatty acid ester (EFAE) in the 5–20 phr range as environmentally friendly solutions for P3HB industrial formulations with improved toughness. The results show that optimum balance between ductile properties is achieved with low plasticizer content (5 phr) for both plasticizer types. Elongation at break and the impact resistance are increased by 28 and 71% respectively after addition of 5 phr MLO. With regard to EFAE, the elongation at break is improved by 40% and the impact resistance is increased to twice the value of P3HB. Another effect that both plasticizers provide is the thermal stabilization with a delay in the onset degradation temperature.

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Section: Resultssupporting

confidence: 79%

Improvement of Mechanical Ductile Properties of Poly(3-hydroxybutyrate) by Using Vegetable Oil Derivatives

Garcia‐Garcia

Fenollar

Fombuena

et al. 2016

Macromol. Mater. Eng.

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“…The synergistic effect of plasticizers and nucleating agents in the crystallinity increase was found by the study of the thermal and mechanical properties of PLA nanocomposites [31], in which crystallization by heating (cold crystallization takes place) and crystallinity degree could vary from 12% to more than 30% [5,32] depending on processing and heating conditions, plasticizer and nucleating agent type and concentration. From the DSC curves of the neat PLA and PLA/ZnO:Cu/Ag bionanocomposites - Figure 7, the thermal characteristics have been determined and they are given in Table 3.…”

Section: Differential Scanning Calorimetry (Dsc)mentioning

confidence: 99%

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

Vasile¹,

Râpă²,

Ştefan³

et al. 2017

Express Polym. Lett.

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“…Previous studies have reported the use of plasticizers for the improvement of PLA properties . Plasticizers are widely used in the plastics industry to improve the processability, flexibility, and ductility of glassy polymers.…”

Section: Introductionmentioning

confidence: 99%

“…Plasticizers are widely used in the plastics industry to improve the processability, flexibility, and ductility of glassy polymers. Citrate ester is one of the most studied among these plasticizers . It is nontoxic and confirmed for use as an additive in food, personal care products, and medical plastic applications.…”

Section: Introductionmentioning

confidence: 99%

Combined effect of a plasticizer and carvacrol and thymol on the mechanical, thermal, morphological properties of poly(lactic acid)

Çelebi

Güneş

2017

J of Applied Polymer Sci

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In this study, the effects of the monotherpenic phenol concentration on the properties of biocomposites containing plasticized poly(lactic acid) (PLA) with acetyl tributyl citrate (ATBC) were investigated. The monotherpenic phenols carvacrol (C) and thymol (T) were added to PLA by a melt‐blending method. The prepared samples were characterized by means of tensile testing, Fourier transform infrared spectroscopy, thermogravimetric analysis, differential scanning calorimetry, scanning electron microscopy (SEM), and antibacterial activity tests. The addition of ATBC to PLA resulted in hydrogen bonding between ATBC and PLA. We observed that ATBC, C, and T reduced the glass‐transition temperature of PLA. The presence of C and T decreased the maximum degradation temperature slightly. Because of the plasticization effect of the additives, the tensile strength and Young's modulus of PLA decreased, whereas the extent of elongation they experienced before failure increased. This effect was also observed with SEM analysis in terms of plastic deformation at break. The antibacterial activity tests showed that samples containing high concentrations of C demonstrated an improved antibacterial activity against Staphylococcus aureus, Salmonella typhimurium, and Listeria monocytogenes bacteria. We observed that C exhibited a higher inhibition against bacterial strains than T. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45895.

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Influence of chitosan on mechanical, thermal, barrier and antimicrobial properties of PLA-biocomposites for food packaging

Cited by 119 publications

References 36 publications

Improvement of Mechanical Ductile Properties of Poly(3-hydroxybutyrate) by Using Vegetable Oil Derivatives

Improvement of Mechanical Ductile Properties of Poly(3-hydroxybutyrate) by Using Vegetable Oil Derivatives

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

Combined effect of a plasticizer and carvacrol and thymol on the mechanical, thermal, morphological properties of poly(lactic acid)

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