Development and characterization of thin film composite developed from poly (vinyl alcohol) (PVA)/polyethylene glycol (PEG)/norbixin (NBx)/hydroxyapatite

Júnior, Raimundo Miguel da Silva; Viana, Deuzuita dos Santos Freitas; Silva, Durcilene Alves da; Santos, Ana Larisse Nunes dos; Ramos, Igor Frederico da Silveira; Sousa, Gustavo Fernandes de; Silva, Janiel Costa da; Viana, Vicente Galber Freitas

doi:10.1007/s00396-020-04777-3

Cited by 6 publications

(3 citation statements)

References 67 publications

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“…Neat PVA fibers have a semicrystalline structure (Figure a 1 ) with a high fiber orientation of 92.0%. Inter-/intramolecular hydrogen bonding between PVA polymer chains − (Figure a 2 ) impedes the mobility of macromolecular chains in the drawing process. The total DR of neat PVA fibers was the lowest (17.37), verifying its low chain mobility during the drawing process.…”

Section: Resultsmentioning

confidence: 99%

High-Performance Gel-Spun Poly(vinyl alcohol) Fibers Reinforced by Organosolv Lignin-graft-poly(acrylic acid)

Cheng

Lin

Zheng

et al. 2022

Ind. Eng. Chem. Res.

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Water-soluble synthetic poly(vinyl alcohol) (PVA) polymers can be used as a raw material for high-performance solution-spun fibers. To enhance the biodegradability and physical properties of PVA fibers, lignin has been considered a low-cost, biobased filler/additive for PVA fibers. However, its amorphous structure and hydrophobic nature cause difficulty in developing lignin-reinforced PVA high-performance fibers due to the poor compatibility of amorphous lignin and linear semicrystalline hydrophilic PVA. Herein, the graft copolymerization of organosolv lignin (OL) and acrylic acid (AA) was performed at different reaction durations to yield hydrophilic lignin copolymers, which had enhanced compatibility with polar synthetic PVA. Chemically modified OL with reaction durations of 0, 12, and 24 h was incorporated into PVA fibers by gel spinning. With 5% modified OL from 24 h of reaction time, the composite fibers had an excellent tensile strength of 1.15 GPa, which was 61.4% higher than that of neat PVA fibers. This fiber’s Young’s modulus (13.09 GPa) and toughness (26 J/g) were also substantially enhanced when compared with those of the neat PVA fibers (Young’s modulus of 8.97 GPa and toughness of 18.09 J/g). This work enables the high-value utilization of a modified lignin filler in synthetic fibers for potential applications in industrial or technical textile fields.

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Section: Resultsmentioning

confidence: 99%

High-Performance Gel-Spun Poly(vinyl alcohol) Fibers Reinforced by Organosolv Lignin-graft-poly(acrylic acid)

Cheng

Lin

Zheng

et al. 2022

Ind. Eng. Chem. Res.

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“…This phenomenon occurred because polymers have certain viscoelasticity. [60,61] In the friction process, with the increase in load, the contact area between the stainless steel ball and the composite film will also increase, which increased the heat generation. The heat generated was not enough to reach the critical interface temperature (i.e., the softening temperature of the polymer), but increased the adhesion of the composite film, which was the main reason for reducing the friction coefficient.…”

Section: Lubricity Performance Of V 5 E 5 C 15 At Different Loads And...mentioning

confidence: 99%

Excellent Lubricity of PVA/PEG/CS Composite on Ceramic Surface and Stainless Steel Friction Pair

Liu

Wei

et al. 2022

Physica Status Solidi (a)

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At present, polymers such as polyethylene glycol (PEG) and chitosan (CS) are widely studied because of their excellent lubricating properties. Herein, powder combinations of different mass ratios are obtained by changing the mass of CS, and polymer films are obtained by hot pressing on the surface of the aluminum disk after microarc oxidation (MAO). The structure and crystallinity of the polymer composite film are characterized by X‐ray diffraction (XRD), Fourier‐transform infrared (FTIR), and X‐ray photoelectron spectroscopy (XPS), which show that there is no chemical reaction between various substances. The tribological properties of the composite film are evaluated. Experiments show that when the mass ratio of polyvinyl alcohol (PVA), PEG, and CS is 5:5:1.5, the composite film has excellent lubrication performance, and the friction coefficient reaches 0.068 under long‐time running in. This effect meets the social requirements for lubrication performance to a certain extent and is expected to replace some mature solid lubricants.

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“…In the first stage, occurring at about 250 C, there is a 5.1% mass loss of PVA, and this degradation is attributed to the breakage of hydrogen bonds formed between water and PVA. The second stage of degradation occurs at temperatures between 250 and 500 C, where PVA undergoes extensive decomposition, which is attributed to the degradation of the (C OH)-type bonds of the residual acetate groups 39. Compared to pure PVA gels for PVA/PEG composite gels with different decomposition behavior, slight weight loss occurs by elimination of weakly bound water molecules before 350 C. Due to the degradation of the PVA/PEG backbone, the second weight loss decreases sharply from 350 to 480 C, followed by the decomposition of hydrocarbon chain-type (C C) bonds with approximately 100% decomposition mass as the temperature increases.…”

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confidence: 99%

Organic solvents enhance polyvinyl alcohol/polyethylene glycol self‐healing hydrogels for artificial cartilage

Jia

et al. 2022

Polymers for Advanced Techs

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Polyvinyl alcohol (PVA) hydrogels have potential applications in bionic articular cartilage due to their good biocompatibility and low friction. However, the lack of adequate mechanical properties is a key obstacle for PVA hydrogels to replace natural cartilage. In this study, polyethylene glycol (PEG) was introduced into the PVA hydrogel, and the (PVA/PEG) composite gels were prepared by a blending physical cross-linking method. The PVA/PEG gels were treated with a simple and novel organic solvent immersion dehydration to improve its mechanical and tribological properties. And the using of organic solvents for dehydration changed the network structure of the PVA/PEG gels, which improved the mechanical properties effectively. In this study, the effects of different organic solvents on the tribological properties, swelling ratio, shore hardness, and dehydration rate of PVA/PEG hydrogels were investigated. Compared with natural drying, organic solvent dehydration reduced the gel formation time. Notably, the organic solvent dehydration treatment reduces the wear rate of PE ball friction pair to 27.4% of the original amount, improving wear resistance. Meanwhile, self-healing and cellular immune assays demonstrated the excellent biocompatibility and self-healing ability of the PVA/PEG gels.This study provides a new candidate material for the design of articular cartilage, which is expected to advance the progress of artificial cartilage repair.

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Development and characterization of thin film composite developed from poly (vinyl alcohol) (PVA)/polyethylene glycol (PEG)/norbixin (NBx)/hydroxyapatite

Cited by 6 publications

References 67 publications

High-Performance Gel-Spun Poly(vinyl alcohol) Fibers Reinforced by Organosolv Lignin-graft-poly(acrylic acid)

High-Performance Gel-Spun Poly(vinyl alcohol) Fibers Reinforced by Organosolv Lignin-graft-poly(acrylic acid)

Excellent Lubricity of PVA/PEG/CS Composite on Ceramic Surface and Stainless Steel Friction Pair

Organic solvents enhance polyvinyl alcohol/polyethylene glycol self‐healing hydrogels for artificial cartilage

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