Morphological control and properties of poly(lactic acid) hollow fibers for biomedical applications

Domingues, Rui Carlos Castro; Pereira, Cláudio M.N.A.; Borges, Cristiano Piacsek

doi:10.1002/app.45494

Cited by 18 publications

(10 citation statements)

References 40 publications

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“…When compared to experimental measurements, our calculated 𝛿 showed varying degrees of agreement. For instance, the 𝛿 value (19.7 MPa 0.5 ) matched exactly experimental measurements (19-20.7 MPa 0.5 ), [47][48][49] while 𝛿 (26.5 MPa 0.5 ) and particularly 𝛿 (23.6 MPa 0.5 ) are considerably lower than their corresponding experimental values (29.3 MPa 0.5 and 41.15 MPa 0.5 ). 50,51 The discrepancy between calculated and experimental solubility parameters observed in the polysaccharide materials can be explained by the inherent crystallinity of experimental samples particularly the polysaccharide components.…”

Section: Miscibility and Mutual Organizationsupporting

confidence: 70%

Molecular-scale exploration of mechanical properties and interactions of poly(lactic acid) with cellulose and chitin

Mileo

Krauter

Sanders

et al. 2022

Preprint

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Poly(lactic acid) (PLA), one of the pillars of the current overarching displacement trend switching from oil- to natural-based polymers is often associated with polysaccharides, to benefit from their increased mechanical properties. This association is, however, greatly hampered by the poor PLA/polysaccharide miscibility, whose underlying nature is still vastly unexplored. This work aims at shedding light into the PLA-polysaccharide interactions and reveal structure-property relationships from a fundamental perspective using atomistic molecular dynamics with amorphous cellulose and chitin as representative polysaccharide molecules. Our computational strategy was able to reproduce targeted mechanical properties of pure and/or composite materials, reveal a lesser degree of immiscibility in PLA/chitin compared to PLA/cellulose associations, assert PLA-oriented polysaccharide reorientations and explore how less effective PLA-polysaccharide hydrogen bonds are related to the poor PLA/polysaccharide miscibility.

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Section: Miscibility and Mutual Organizationsupporting

confidence: 70%

Molecular-scale exploration of mechanical properties and interactions of poly(lactic acid) with cellulose and chitin

Mileo

Krauter

Sanders

et al. 2022

Preprint

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“…According to the HSP concept, the total solubility parameter (δt) of an IL can be divided into partial solubility parameters, namely, polar (δP), hydrogen bonding (δH) and dispersion (δD) [39,40,41]:δt2=δD2+δP2+δH2…”

Section: Resultsmentioning

confidence: 99%

Practical Determination of the Solubility Parameters of 1-Alkyl-3-methylimidazolium Bromide ([CnC1im]Br, n = 5, 6, 7, 8) Ionic Liquids by Inverse Gas Chromatography and the Hansen Solubility Parameter

Zhu

Wang

et al. 2019

Molecules

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The physicochemical properties of four 1-alkyl-3-methylimidazolium bromide ([CnC1im]Br, n = 5, 6, 7, 8) ionic liquids (ILs) were investigated in this work by using inverse gas chromatography (IGC) from 303.15 K to 343.15 K. Twenty-eight organic solvents were used to obtain the physicochemical properties between each IL and solvent via the IGC method, including the specific retention volume and the Flory–Huggins interaction parameter. The Hildebrand solubility parameters of the four [CnC1im]Br ILs were determined by linear extrapolation to be δ 2 ( [ C 5 C 1 im ] Br ) = 25.78 (J·cm−3)0.5, δ 2 ( [ C 6 C 1 im ] Br ) = 25.38 (J·cm−3)0.5, δ 2 ( [ C 7 C 1 im ] Br ) =24.78 (J·cm−3)0.5 and δ 2 ( [ C 8 C 1 im ] Br ) = 24.23 (J·cm−3)0.5 at room temperature (298.15 K). At the same time, the Hansen solubility parameters of the four [CnC1im]Br ILs were simulated by using the Hansen Solubility Parameter in Practice (HSPiP) at room temperature (298.15 K). The results were as follows: δ t ( [ C 5 C 1 im ] Br ) = 25.86 (J·cm−3)0.5, δ t ( [ C 6 C 1 im ] Br ) = 25.39 (J·cm−3)0.5, δ t ( [ C 7 C 1 im ] Br ) = 24.81 (J·cm−3)0.5 and δ t ( [ C 8 C 1 im ] Br ) = 24.33 (J·cm−3)0.5. These values were slightly higher than those obtained by the IGC method, but they only exhibited small errors, covering a range of 0.01 to 0.1 (J·cm−3)0.5. In addition, the miscibility between the IL and the probe was evaluated by IGC, and it exhibited a basic agreement with the HSPiP. This study confirms that the combination of the two methods can accurately calculate solubility parameters and select solvents.

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“…Improved miscibility for MLO-modified Arboform formulations can be related to a similar solubility parameter between MLO and the biopolyester contained in the Arboform matrix, thus allowing interactions between them. It has been reported that chemically modified vegetable oils have solubility parameters close to PLA, specifically epoxidized compounds derived from soybean oil achieved a solubility parameter of 16.70 MPa 1/2 [47], while maleinized oil showed a value of 19 MPa 1/2 , quite similar to the solubility parameter of PLA, which has been reported to be in the range 19.5-22.0 MPa 1/2 [48,49].…”

Section: Resultsmentioning

confidence: 81%

Improved Toughness in Lignin/Natural Fiber Composites Plasticized with Epoxidized and Maleinized Linseed Oils

et al. 2020

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The use of maleinized (MLO) and epoxidized (ELO) linseed oils as potential biobased plasticizers for lignin/natural fiber composites formulations with improved toughness was evaluated. Arboform®, a lignin/natural fiber commercial composite, was used as a reference matrix for the formulations. The plasticizer content varied in the range 0–15 wt % and mechanical, thermal and morphological characterizations were used to assess the potential of these environmentally friendly modifiers. Results from impact tests show a general increase in the impact-absorbed energy for all the samples modified with bio-oils. The addition of 2.5 wt % of ELO to Arboform (5.4 kJ/m2) was able to double the quantity of absorbed energy (11.1 kJ/m2) and this value slightly decreased for samples containing 5 and 10 wt %. A similar result was obtained with the addition of MLO at 5 wt %, with an improvement of 118%. The results of tensile and flexural tests also show that ELO and MLO addition increased the tensile strength as the percentage of both oils increased, even if higher values were obtained with lower percentages of maleinized oil due to the possible presence of ester bonds formed between multiple maleic groups present in MLO and the hydroxyl groups of the matrix. Thermal characterization confirmed that the mobility of polymer chains was easier in the presence of ELO molecules. On the other hand, MLO presence delayed the crystallization event, predominantly acting as an anti-nucleating agent, interrupting the folding or packing process. Both chemically modified vegetable oils also efficiently improved the thermal stability of the neat matrix.

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Morphological control and properties of poly(lactic acid) hollow fibers for biomedical applications

Cited by 18 publications

References 40 publications

Molecular-scale exploration of mechanical properties and interactions of poly(lactic acid) with cellulose and chitin

Molecular-scale exploration of mechanical properties and interactions of poly(lactic acid) with cellulose and chitin

Practical Determination of the Solubility Parameters of 1-Alkyl-3-methylimidazolium Bromide ([CnC1im]Br, n = 5, 6, 7, 8) Ionic Liquids by Inverse Gas Chromatography and the Hansen Solubility Parameter

Improved Toughness in Lignin/Natural Fiber Composites Plasticized with Epoxidized and Maleinized Linseed Oils

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