A Review on Synthesis, Properties, and Applications of Polylactic Acid/Silica Composites

Kaseem, Mosab; Rehman, Zeeshan Ur; Hossain, Shakhawat; Singh, Ashish Kumar; Dikici, Burak

doi:10.3390/polym13183036

Cited by 27 publications

(26 citation statements)

References 97 publications

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“…The exposure of the studied material to the action of γ-radiation induces a diminution in the thermal stability, especially in the range of higher temperatures [ 74 ] ( Figure 3 ). The oxidation starts earlier and the temperature increases over 200 °C, which may induce the slight recombination of hydrocarbon radicals and cyclization of lactide structures.…”

Section: Resultsmentioning

confidence: 99%

“…The nanotechnologies approaches provide the specific solutions for the formulations of resistant materials, which are based on improving the contribution of inorganic fillers [ 83 , 84 ]. Various formulations based on PLA try to find optimal solutions for the enlargement of application areas: biodegradability [ 74 , 85 , 86 ], medical range [ 87 , 88 ], packaging products [ 89 , 90 ], optical bioimaging [ 91 ], controlling the release of hydrophilic pharmaceutical compounds [ 92 ], production of contractible materials [ 93 ], recycling [ 94 ].…”

Section: Discussionmentioning

confidence: 99%

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Stability Study of the Irradiated Poly(lactic acid)/Styrene Isoprene Styrene Reinforced with Silica Nanoparticles

Lupu

Mariș

Zaharescu³

et al. 2022

Materials

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In this paper, the stability improvement of poly(lactic acid) (PLA)/styrene-isoprene block copolymer (SIS) loaded with silica nanoparticles is characterized. The protection efficiency in the material of thermal stability is mainly studied by means of high accurate isothermal and nonisothermal chemiluminescence procedures. The oxidation induction times obtained in the isothermal CL determinations increase from 45 min to 312 min as the polymer is free of silica or the filler loading is about 10%, respectively. The nonisothermal measurements reveal the values of onset oxidation temperatures with about 15% when the concentration of SiO2 particles is enhanced from none to 10%. The curing assay and Charlesby–Pinner representation as well as the modifications that occurred in the FTIR carbonyl band at 1745 cm−1 are appropriate proofs for the delay of oxidation in hybrid samples. The improved efficiency of silica during the accelerated degradation of PLA/SIS 30/n-SiO2 composites is demonstrated by means of the increased values of activation energy in correlation with the augmentation of silica loading. While the pristine material is modified by the addition of 10% silica nanoparticles, the activation energy grows from 55 kJ mol−1 to 74 kJ mol−1 for nonirradiated samples and from 47 kJ mol−1 to 76 kJ mol−1 for γ-processed material at 25 kGy. The stabilizer features are associated with silica nanoparticles due to the protection of fragments generated by the scission of hydrocarbon structure of SIS, the minor component, whose degradation fragments are early converted into hydroperoxides rather than influencing depolymerization in the PLA phase. The reduction of the transmission values concerning the growing reinforcement is evidence of the capacity of SiO2 to minimize the changes in polymers subjected to high energy sterilization. The silica loading of 10 wt% may be considered a proper solution for attaining an extended lifespan under the accelerated degradation caused by the intense transfer of energy, such as radiation processing on the polymer hybrid.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Stability Study of the Irradiated Poly(lactic acid)/Styrene Isoprene Styrene Reinforced with Silica Nanoparticles

Lupu

Mariș

Zaharescu³

et al. 2022

Materials

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“…To provide mechanical strength, PLA was selected as the loading scaffold for BG. PLA is known as a degradable polymer, the degradation product is nontoxic and has good mechanical properties ( Kaseem et al, 2021 ). The results of the study showed that the composite of the two materials not only improved the mechanical properties and elastic modulus but also met the requirements of bone induction.…”

Section: Discussionmentioning

confidence: 99%

3D printing polylactic acid polymer-bioactive glass loaded with bone cement for bone defect in weight-bearing area

Ding

Liu²,

Zhang³

et al. 2022

Front. Bioeng. Biotechnol.

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The treatment of bone defects in weight-bearing areas is mainly to transplant filling materials into the defect area, to provide immediate and strong support for weight-bearing. At present, the commonly used filling material is bone cement, which can only provide physical support without bone regeneration effect. The long-term stress at the interface may cause the loosening of bone cement. The ideal filling material should provide not only strong mechanical support but also promote bone regeneration. We introduce a 3D printing frame-filling structure in this study. The structure was printed with polylactic acid/bioactive glass as the frame, and bone cement as the filler. In this system, bone cement was used to provide immediate fixation, and the frame provided long-term fixation by promoting osteogenic induction and conduction between the interface. The results showed that the degradation of bioactive glass in the frame promoted osteogenic metabolism, induced M2 polarization of macrophages, and inhibited local inflammatory response. The in vivo study revealed that implantation of the frame-filling structure significantly promoted bone regeneration in the femoral bone defect area of New Zealand white rabbits. For a bone defect in a weight-bearing area, long-term stability could be obtained by bone integration through this frame-filling structure.

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“…PLA has good physical and rheological properties, similar to polyethylene terephthalate and polystyrene. Due to its non-toxicity, biodegradability and biocompatibility, PLA can be used in many industries as well as in medicine in biomedical applications [23][24][25].…”

Section: Materials Chemical Compositionmentioning

confidence: 99%

The Influence of the Gradient Infill of PLA Samples Produced with the FDM Technique on Their Mechanical Properties

et al. 2022

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Three-dimensional printing is a dynamically developing field of industry. Its main advantage is the small amount of waste, no need to use specialized tools, and easy control of the mechanical properties of the printed model. One of the most popular techniques of 3D printing is FDM. The main factor influencing the mechanical properties of 3D-printed materials is the filling density. The aim of this study was to determine the mechanical properties of porous structures with a porosity gradient of PLA samples printed using the FDM technique. The accuracy of mapping the structures by computed tomography was assessed, and then a static compression test was performed. It has been shown that the strength properties increased with the increase in the filling density. The highest value of compression strength, amounting to 41.2 MPa, was observed for samples made of PLA with an 80% filling degree, whereas the lowest value of compression strength was found in PLA-T samples with a filling degree of 10%, reaching only 0.6 MPa. It was found that not only the core filling density, but also the outer layers, influences the mechanical properties. The assessment of spatial architecture allowed for a qualitative and quantitative assessment. The obtained images from the computed tomograph showed that the designed sample models were correctly reproduced in the entire volume.

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A Review on Synthesis, Properties, and Applications of Polylactic Acid/Silica Composites

Cited by 27 publications

References 97 publications

Stability Study of the Irradiated Poly(lactic acid)/Styrene Isoprene Styrene Reinforced with Silica Nanoparticles

Stability Study of the Irradiated Poly(lactic acid)/Styrene Isoprene Styrene Reinforced with Silica Nanoparticles

3D printing polylactic acid polymer-bioactive glass loaded with bone cement for bone defect in weight-bearing area

The Influence of the Gradient Infill of PLA Samples Produced with the FDM Technique on Their Mechanical Properties

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