Synthesis of PLA-co-PGMA Copolymer and its Application in the Surface Modification of Bacterial Cellulose

Li, Zhao Qian; Zhou, Xiao Dong; Pei, Chong Hua

doi:10.1080/00914037.2010.483214

Cited by 51 publications

(13 citation statements)

References 22 publications

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“…This was an indication that surface modification promoted good wettability and better fiber-matrix adhesion, allowing efficient stress transfer between the matrix and the fibers. This could be due to the better dispersion of fibers and the interaction of PLA and modified sisal fibers, and the reaction mechanism of the coupling agents and natural fiber has been explained in former paper [17,18]. Table 1 also showed the properties of PLA plasticized with PEG and their composites with sisal fibers.…”

Section: Static Mechanical Propertiesmentioning

confidence: 73%

“…The chemical treatment of sisal fibers will bring about a positive effect as well as a negative one upon properties of fibers. Surface treatments of sisal fiber decreased its surface energy and the interfacial tension of fibers/PLA, which improved the dispersion of sisal fiber in PLA matrix and the compatibility of fiber and PLA [17,18]. On the other hand, the strength and modulus of natural fiber reduced because of chemical treatment.…”

Section: Impact Strength Of Compositesmentioning

confidence: 99%

“…In our recent work, we have synthesized two different macromolecular coupling agents: MPS-g-PLA (Polylactidegraft-γ-methacryloxypropyltrimethoxysilane) and PLA-co-PGMA (Polylactide-co-glycidyl methacrylate) [17,18]. And the results of the former research suggested that they were efficient in modifying natural fiber surface and in improving the compatibility of PLA/cellulose composites.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Sisal Fiber Surface Treatment on Properties of Sisal Fiber Reinforced Polylactide Composites

Zhou

Pei

2011

International Journal of Polymer Science

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Mechanical properties of composites are strongly influenced by the quality of the fiber/matrix interface. The objective of this study was to evaluate the mechanical properties of polylactide (PLA) composites as a function of modification of sisal fiber with two different macromolecular coupling agents. Sisal fiber reinforced polylactide composites were prepared by injection molding, and the properties of composites were studied by static/dynamic mechanical analysis (DMA). The results from mechanical testing revealed that surface-treated sisal fiber reinforced composite offered superior mechanical properties compared to untreated fiber reinforced polylactide composite, which indicated that better adhesion between sisal fiber and PLA matrix was achieved. Scanning electron microscopy (SEM) investigations also showed that surface modifications improved the adhesion of the sisal fiber/polylactide matrix.

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Section: Static Mechanical Propertiesmentioning

confidence: 73%

Section: Impact Strength Of Compositesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Sisal Fiber Surface Treatment on Properties of Sisal Fiber Reinforced Polylactide Composites

Zhou

Pei

2011

International Journal of Polymer Science

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“…In our case, the surface tension of water is still the same (72 mJ/m 2 ) as mentioned above and that of PLA is around 40 mJ/m 2 . [27][28][29] Accordingly, water does not wet PLA fibers and cannot penetrate into the devices easily. Compression obviously changed the pore structure of the device (see Figure 3), which decreases capillary forces and helps penetration.…”

Section: Penetration Of the Aqueous Medium Wettingmentioning

confidence: 99%

<p>Electrospun PLA Fibers Containing Metronidazole for Periodontal Disease</p>

Budai-Szűcs

Léber

Cui

et al. 2020

DDDT

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Purpose: Electrospun PLA fiber devices were investigated in the form of fiber mats and disks. Metronidazole was used as an active agent; its concentration was 12.2 and 25.7 wt% in the devices. Methods: The structure was studied by X-ray diffraction and scanning electron microscopy, drug release by dissolution measurements, while the antimicrobial efficiency was tested on five bacterial strains. Results: The XRD study showed that the polymer was partially crystalline in both devices, but a part of metronidazole precipitated and was in the form of crystals among and within the fibers. Liquid penetration and dissolution were different in the two devices, they were faster in disks and slower in fiber mats, due to the morphology of the device and the action of capillary forces. Disks released the drug much faster than fiber mats. Although the release study indicated fast drug dissolution, the concentration achieved a plateau value in 24 hrs for the disks; the inhibition effect lasted much longer, 13 days for bacteria sensitive to metronidazole. The longer inhibition period could be explained by the slower diffusion of metronidazole located inside the fibers of the device. Conclusion: The results suggest that the devices may be effective in the treatment of periodontitis.

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“…To overcome the problem of poor dispersion of nanocellulose materials in a hydrophobic polymer matrix, surface functionalization of nanocellulose has been performed and investigated. [30][31][32] The grafting of polymer brushes to nanocellulose using either a "grafting to" or "grafting from" approach is an important method to improve the dispersion of nanocellulose and the interaction between the nanocellulose and polymer matrix. 33 TOCNF is superior to native nanocellulose for selective and dense grafting of polymer owing to the carboxyl groups on its surface.…”

Section: Introductionmentioning

confidence: 99%

High-Strength, High-Toughness Aligned Polymer-Based Nanocomposite Reinforced with Ultralow Weight Fraction of Functionalized Nanocellulose

et al. 2018

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Multifunctional lightweight, flexible, yet strong polymer-based nanocomposites are highly desired for specific applications. However, the control of orientation and dispersion of reinforcing nanoparticles and the optimization of the interfacial interaction still pose substantial challenges in nanocellulose-reinforced polymer composites. In this study, poly(ethylene glycol) (PEG)-grafted cellulose nanofibers have demonstrated much better dispersion in a poly(lactic acid) (PLA) matrix as compared to unmodified nanocellulose. Through a uniaxial drawing method, aligned PLA/nanocellulose nanocomposites with high strength, high toughness, and unique optical behavior can be obtained. With the incorporation of 0.1 wt % of the PEG-grafted cellulose nanofibers in PLA, the ultimate strength of the aligned nanocomposite reaches 343 MPa, which is significantly higher than that of other aligned PLA-based nanocomposites reported previously. Moreover, its ultimate strength and toughness are enhanced by 39% and 70%, respectively, as compared to the aligned nanocomposite reinforced with unmodified cellulose nanofibers. In addition, the aligned nanocomposite film is highly transparent and possesses an anisotropic light scattering effect, revealing its significant potential for optical applications.

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Synthesis of PLA-co-PGMA Copolymer and its Application in the Surface Modification of Bacterial Cellulose

Cited by 51 publications

References 22 publications

Effect of Sisal Fiber Surface Treatment on Properties of Sisal Fiber Reinforced Polylactide Composites

Effect of Sisal Fiber Surface Treatment on Properties of Sisal Fiber Reinforced Polylactide Composites

<p>Electrospun PLA Fibers Containing Metronidazole for Periodontal Disease</p>

High-Strength, High-Toughness Aligned Polymer-Based Nanocomposite Reinforced with Ultralow Weight Fraction of Functionalized Nanocellulose

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