PLA/CaO nanocomposites with antimicrobial and photodegradation properties

Loyo, Carlos; Moreno‐Serna, Viviana; Fuentes, Jairo; Amigó, Nicolás; Sepúlveda, Francesca Antonella; Ortiz, J. Andrés; Rivas, Lina; Ulloa, María Teresa; Benavente, Rosario; Zapata, Paula Andrea

doi:10.1016/j.polymdegradstab.2022.109865

Cited by 34 publications

(29 citation statements)

References 107 publications

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“…This significant interaction between the nanomaterial and the polymeric matrix facilitated the transmission of mechanical stress. Similar results have been previously reported for PLA reinforced with other nanomaterials [ 34 ].…”

Section: Resultssupporting

confidence: 92%

“…For the PLA, it is possible to observe the T cc as an exothermic peak due to the crystallization of the polymer chains during cooling and two endothermic transitions due to the melting of the PLA crystalline domains (T m1 and T m2 ). An important consideration is the similar enthalpies of the two contiguous processes, indicating a low crystalline character of the PLA used [ 34 ]. The presence of two T m indicates polymorphism of the different crystal structures present in the PLA mixture.…”

Section: Resultsmentioning

confidence: 99%

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Biocompatibility Assessment of Polylactic Acid (PLA) and Nanobioglass (n-BG) Nanocomposites for Biomedical Applications

et al. 2022

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Scaffolds based on biopolymers and nanomaterials with appropriate mechanical properties and high biocompatibility are desirable in tissue engineering. Therefore, polylactic acid (PLA) nanocomposites were prepared with ceramic nanobioglass (PLA/n-BGs) at 5 and 10 wt.%. Bioglass nanoparticles (n-BGs) were prepared using a sol–gel methodology with a size of ca. 24.87 ± 6.26 nm. In addition, they showed the ability to inhibit bacteria such as Escherichia coli (ATCC 11775), Vibrio parahaemolyticus (ATCC 17802), Staphylococcus aureus subsp. aureus (ATCC 55804), and Bacillus cereus (ATCC 13061) at concentrations of 20 w/v%. The analysis of the nanocomposite microstructures exhibited a heterogeneous sponge-like morphology. The mechanical properties showed that the addition of 5 wt.% n-BG increased the elastic modulus of PLA by ca. 91.3% (from 1.49 ± 0.44 to 2.85 ± 0.99 MPa) and influenced the resorption capacity, as shown by histological analyses in biomodels. The incorporation of n-BGs decreased the PLA crystallinity (from 7.1% to 4.98%) and increased the glass transition temperature (Tg) from 53 °C to 63 °C. In addition, the n-BGs increased the thermal stability due to the nanoparticle’s intercalation between the polymeric chains and the reduction in their movement. The histological implantation of the nanocomposites and the cell viability with HeLa cells higher than 80% demonstrated their biocompatibility character with a greater resorption capacity than PLA. These results show the potential of PLA/n-BGs nanocomposites for biomedical applications, especially for long healing processes such as bone tissue repair and avoiding microbial contamination.

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Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Biocompatibility Assessment of Polylactic Acid (PLA) and Nanobioglass (n-BG) Nanocomposites for Biomedical Applications

et al. 2022

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“…The X‐ray diffraction (Siemens D5000 diffractometer) patterns of the MgO nanoparticles were analyzed using Ni‐filtered Cu Kα radiation ( λ = 0.154 nm). FTIR spectra were collected in a Fourier Transform Infrared spectrometer (Bruker Vector 22 FTIR), and samples were combined with KBr for analysis in the wavelength range from 4000 to 500 cm −1 at room temperature, 64 scans of accumulation, and a resolution of 4 cm −1 36 …”

Section: Methodsmentioning

confidence: 99%

“…Schematic description of the preparation of MgO and Mod-MgO nanoparticles. Created with BioRender.com from 4000 to 500 cm À1 at room temperature, 64 scans of accumulation, and a resolution of 4 cm À1 36. …”

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Mechanical and antimicrobial properties of low‐density‐polyethylene/MgO nanocomposites

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Moreno‐Serna

Loyo

et al. 2022

Polymers for Advanced Techs

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Low‐density polyethylene (LDPE) nanocomposites containing magnesium oxide (MgO) nanoparticles are obtained by melt mixing. MgO nanoparticles ca. 29 ± 2 nm are synthesized by sol–gel and organically modified on the surface with oleic acid (Mod‐MgO), whose final concentration in the polymers is 3, 5, and 10 wt%. The presence of these nanoparticles did not affect the crystallization process of LDPE. However, Young's modulus increases with 10 wt% of Mod‐MgO nanoparticles, rendering higher reinforcement effects with an increase as high as 48%. This affects the elongation at break, which decreases ca. 57% compared to neat LDPE. The storage and loss modulus of the LDPE/MgO and LDPE/Mod‐MgO nanocomposites increases at room temperature and low temperatures (−150 to −50°C) compared to neat LDPE. SEM analysis showed that the organic modification of MgO nanoparticles improved their dispersion within the polymer matrix. Nanocomposites present antimicrobial properties against Escherichia coli, reaching an efficiency ca. 53%.

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“…Using hydroxyapatite with micro-and nano-particles as filler, Zaharescu et al studied the effect of prepared PLA composite film with excellent gas barrier performance, high strength, and toughness, which showed promising prospect to be applied in the field of pharmaceutical packaging (Zhou et al, 2016). Antimicrobial and photodegradation properties of PLA/ CaO nanocomposites were studied by Loyo et al (2022). Results of their experiments showed that incorporating CaO nanoparticles into the PLA could be an applicable strategy for development of eco-friendly new medical packaging and devices.…”

Section: Pla Related Polymersmentioning

confidence: 99%

Recent progress in nanocomposites of carbon dioxide fixation derived reproducible biomedical polymers

et al. 2022

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In recent years, the environmental problems accompanying the extensive application of biomedical polymer materials produced from fossil fuels have attracted more and more attentions. As many biomedical polymer products are disposable, their life cycle is relatively short. Most of the used or overdue biomedical polymer products need to be burned after destruction, which increases the emission of carbon dioxide (CO2). Developing biomedical products based on CO2 fixation derived polymers with reproducible sources, and gradually replacing their unsustainable fossil-based counterparts, will promote the recycling of CO2 in this field and do good to control the greenhouse effect. Unfortunately, most of the existing polymer materials from renewable raw materials have some property shortages, which make them unable to meet the gradually improved quality and property requirements of biomedical products. In order to overcome these shortages, much time and effort has been dedicated to applying nanotechnology in this field. The present paper reviews recent advances in nanocomposites of CO2 fixation derived reproducible polymers for biomedical applications, and several promising strategies for further research directions in this field are highlighted.

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PLA/CaO nanocomposites with antimicrobial and photodegradation properties

Cited by 34 publications

References 107 publications

Biocompatibility Assessment of Polylactic Acid (PLA) and Nanobioglass (n-BG) Nanocomposites for Biomedical Applications

Biocompatibility Assessment of Polylactic Acid (PLA) and Nanobioglass (n-BG) Nanocomposites for Biomedical Applications

Mechanical and antimicrobial properties of low‐density‐polyethylene/MgO nanocomposites

Recent progress in nanocomposites of carbon dioxide fixation derived reproducible biomedical polymers

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