Morphological, Mechanical and Thermal Properties of Poly(lactic acid) (PLA)/Cellulose Nanofibrils (CNF) Composites Nanofiber for Tissue Engineering

Yang, Zhangqiang; Li, Xiaojie; Si, Junhui; Cui, Zhixiang; Peng, Kaiping

doi:10.1007/s11595-019-2037-7

Cited by 70 publications

(61 citation statements)

References 36 publications

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“…Regardless of the addition of AgNPs, an increase in percentage shares of cellulose nanofibers in PLA matrix from 1% to 4% resulted in a decrease (significant or not) in Young's modulus of composites. The observed effect was partially supported by other studies, showing the negative influence of an increase in the amount of cellulose fibers on Young's modulus of the composite material [8,28]. However, other researchers have also reported results, which contradict current data, showing positive [17,29] or no significant influence [30] of fiber amount on the values of Young's modulus of PLA composites.…”

Section: Mechanical Propertiessupporting

confidence: 66%

Evaluation of Nanocomposite Made of Polylactic Acid and Nanocellulose from Carrot Pomace Modified with Silver Nanoparticles

et al. 2020

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In this research, it was proposed to use carrot cellulose nanofibrils (CCNF) isolated from carrot pomace modified with silver nanoparticles (AgNPs) as a filler of polylactic acid (PLA) composites matrix. The new procedure was based on two steps: first, the preparation of nanocellulose modified with metal nanoparticles, and then the combination with PLA. Two concentrations—0.25 mM and 2 mM—of AgNO3 were used to modify CCNF. Then, PLA was mixed with the filler (CCNF/AgNPs) in two proportions 99:1 and 96:4. The influence of CCNF/AgNPs on mechanical, hydrophilic, thermal, and antibacterial properties of obtained nanocomposites was evaluated. The greatest improvement of mechanical properties was observed for composite containing CCNF with 2 mM of AgNPs, which obtained the lowest Young modulus and highest strain at break. The degradation temperature was lower for PLA with CCNF/AgNPs, but crystallization temperature wasn’t influenced. The addition of CCNF/AgNPs also increased hydrophilicity. The transmission rates of oxygen, nitrogen, and carbon dioxide also increased after the addition of CCNF/AgNPs to PLA. The antibacterial function against Escherichia coli and Bacillus cereus was obtained after the addition of AgNPs but only at the contact surface with the material made, suggesting the lack of migration of nanoparticles from the composite.

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Section: Mechanical Propertiessupporting

confidence: 66%

Evaluation of Nanocomposite Made of Polylactic Acid and Nanocellulose from Carrot Pomace Modified with Silver Nanoparticles

et al. 2020

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“…This represents the temperature range in which the polymer substrate shifts from a stiff glass material to a smooth material [39]. The T g increases with the addition of surface-grafted CNF, which can be attributed to the fact that, as stated earlier, the crystallinity of the PU/CNF composite increased with the addition of CNF, resulting in higher stiffness and rigidity of the composite [40].…”

Section: Characterization Of Uv-cured Compositesmentioning

confidence: 68%

3D Printing of UV-Curable Polyurethane Incorporated with Surface-Grafted Nanocellulose

Mohan,

Sajab,

Kaco

et al. 2019

Nanomaterials

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The recognition of nanocellulose has been prominent in recent years as prospect materials, yet the ineffectiveness of nanocellulose to disperse in an organic solvent has restricted its utilization, especially as a reinforcement in polymer nanocomposite. In this study, cellulose has been isolated and defibrillated as cellulose nanofibrils (CNF) from oil palm empty fruit bunch (EFB) fibers. Subsequently, to enhance its compatibility with UV-curable polyurethane (PU)-based resin, the surface hydrophilicity of CNF has been tailored with polyethylene glycol (PEG), as well as reduced graphene oxide (rGO). The dispersibility of reinforced modified CNF in UV-curable PU was examined through the transmittance interruption of resin, chemical, and mechanical properties of the composite printed using the stereolithographic technique. Evidently, the enhanced compatibility of modified CNF and UV-curable PU was shown to improve the tensile strength and hardness of the composites by 37% and 129%, respectively.

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“…This study provides a simplified method that enhanced the tensile properties of PLA compared to the work of Qu. Yang et al [ 49 ] in their study on preparation of PLA/CNF composite film used electrospinning in order to solve the miscibility challenge. However, the tensile strength obtained was lower compared with this study.…”

Section: Resultsmentioning

confidence: 99%

“…This observation in the fractured surface morphology corroborates those indicated by the surface morphology as earlier reported. [46,49] Figure 6 showed the AFM images of the neat PLA and the composite with increased loading of cellulose nanofabrillated fiber. The AFM images further confirm the morphological properties result of the scanning electron microscope.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

The role of cellulose nanofibrillated fibers produced with combined supercritical carbon dioxide and high‐pressure homogenization process as reinforcement material in biodegradable polymer

et al. 2021

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The production of kenaf bast cellulose nanofibrillated fiber (CNF) using a combined method of supercritical carbon dioxide (SC CO2) and high-pressure homogenization as the reinforcement with biopolymer were studied. The obtained CNF was used as reinforcement in polylactic acid using the solvent casting method. The obtained CNF were verified using TEM and FTIR analysis to approve the effectiveness of the technique. The dispersion of kenaf bast cellulose nanofibrillated fiber in modified PLA was studied with scanning electron microscopy and atomic force microscopy. Further characterization, such as, mechanical, thermal, and wettability properties of the composite was also analyzed. The TEM and FTIR confirmed the formation of nanofiber, and the FTIR result showed a typical bond present in cellulose nanofibrillated fiber. The SEM and AFM showed good dispersion of the kenaf bast cellulose nanofibrilated fiber in PLA. The mechanical and thermal properties of the composite were significantly improved compared with the neat PLA. The wettability showed that the addition of CNF increased the hydrophilicity of the sample. The production of CNF through combine methods displayed comparable properties to those produced from conventional methods and the CNF preparation method in this study is simplified and adaptable for potential industrial application.

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Morphological, Mechanical and Thermal Properties of Poly(lactic acid) (PLA)/Cellulose Nanofibrils (CNF) Composites Nanofiber for Tissue Engineering

Cited by 70 publications

References 36 publications

Evaluation of Nanocomposite Made of Polylactic Acid and Nanocellulose from Carrot Pomace Modified with Silver Nanoparticles

Evaluation of Nanocomposite Made of Polylactic Acid and Nanocellulose from Carrot Pomace Modified with Silver Nanoparticles

3D Printing of UV-Curable Polyurethane Incorporated with Surface-Grafted Nanocellulose

The role of cellulose nanofibrillated fibers produced with combined supercritical carbon dioxide and high‐pressure homogenization process as reinforcement material in biodegradable polymer

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