Antibacterial Performance of Chitin Nanowhisker Reinforced Poly(lactic acid) Composite Nanofiber Membrane

Wei, Jing; Liu, Jingyan; Qiang, Jing; Yang, Lina; Wan, Yuqin; Wang, Hongbo; Gao, Weidong; Ko, Frank

doi:10.1166/asl.2012.3392

Cited by 5 publications

(5 citation statements)

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“…Furthermore, ChNCs have acid amide functional groups on the surface that provide better scope of interactions with the polymers [7]. Additionally, they possess antibacterial [8] and antifungal properties [9] that further expand their usage for packaging applications.…”

Section: Introductionmentioning

confidence: 99%

Effect of Chitin Nanocrystals on Crystallization and Properties of Poly(lactic acid)-Based Nanocomposites

et al. 2020

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The crystalline phase of poly(lactic acid) (PLA) has crucial effects on its own properties and nanocomposites. In this study, the isothermal crystallization of PLA, triethyl citrate-plasticized PLA (PLA–TEC), and its nanocomposite with chitin nanocrystals (PLA–TEC–ChNC) at different temperatures and times was investigated, and the resulting properties of the materials were characterized. Both PLA and PLA–TEC showed extremely low crystallinity at isothermal temperatures of 135, 130, 125 °C and times of 5 or 15 min. In contrast, the addition of 1 wt % of ChNCs significantly improved the crystallinity of PLA under the same conditions owing to the nucleation effect of the ChNCs. The samples were also crystallized at 110 °C to reach their maximal crystallinity, and PLA–TEC–ChNC achieved 48% crystallinity within 5 min, while PLA and PLA–TEC required 40 min to reach a similar level. Moreover, X-ray diffraction analysis showed that the addition of ChNCs resulted in smaller crystallite sizes, which further influenced the barrier properties and hydrolytic degradation of the PLA. The nanocomposites had considerably lower barrier properties and underwent faster degradation compared to PLA–TEC110. These results confirm that the addition of ChNCs in PLA leads to promising properties for packaging applications.

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Section: Introductionmentioning

confidence: 99%

Effect of Chitin Nanocrystals on Crystallization and Properties of Poly(lactic acid)-Based Nanocomposites

et al. 2020

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“…Once the cell wall is damaged, the cell osmotic pressure would be destroyed and finally the bacteria would die [23,24]. Therefore, chitin could be considered an environmentally friendly antibacterial agent [25][26][27][28][29]. Most of the research on NRLF composites involves filler loading [30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of the Antibacterial Activity of Natural Rubber Latex Foam by Blending It with Chitin

Zhang

2020

Materials

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To enhance the antibacterial activity of natural rubber latex foam (NRLF), chitin was added during the foaming process in amounts of 1–5 phr (per hundred rubber) to prepare an environmentally friendly antibacterial NRLF composite. In this research, NRLF was synthesized by the Dunlop method. The swelling, density, hardness, tensile strength, elongation at break, compressive strength and antibacterial activity of the NRLFs were characterized. FTIR and microscopy were used to evaluate the chemical composition and microstructure of the NRLFs. The mechanical properties and antibacterial activity of the NRLF composites were tested and compared with those of pure NRLF. The antibacterial activity was observed by the inhibition zone against E. coli. NRLF composite samples were embedded in a medium before solidification. The experimental results of the inhibition zone indicated that with increasing chitin content, the antibacterial activity of the NRLF composites increased. When the chitin content reached 5 phr, the NRLF composite formed a large and clear inhibition zone in the culture dish. Moreover, the NRLF–5 phr chitin composite improved the antibacterial activity to 281.3% of that of pure NRLF against E. coli.

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“…20,21 Moreover, the antibacterial activity of PLA is also one of the foremost considerations in some fields, especially fabrics. Antibacterial agents, such as nanosilver, 22,23 allyl isothiocyanate, 24 or chitin, 25 were introduced into PLA. Mao et al 26 prepared a double antibacterial coating (PPy/Ag) by polymerizing pyrrole (Py) on the surface of a PLA film.…”

Section: Introductionmentioning

confidence: 99%

Hydrophilic and Antibacterial Modification of Poly(lactic acid) Films by γ-ray Irradiation

et al. 2019

ACS Omega

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To improve the hydrophilicity and imparting antibacterial properties to poly(lactic acid), poly(acrylic acid) (PAA) and silver particles (AgNPs) were simultaneously introduced onto the surface of poly(lactic acid) (PLA) films by γ-ray irradiation. The morphology and structure of the modified films were characterized by scanning electron microscopy (SEM)/energy-dispersive X-ray (EDX) spectrometry and Fourier transform infrared (FTIR) spectroscopy. The interaction between PAA and AgNPs was investigated by X-ray photoelectron spectroscopy (XPS), confirming the coordination between AgNPs and the oxygen atom on the carboxylic group of PAA. The contact-angle (CA) measurements and antibacterial tests showed that the modified PLA films with a low silver content (PLA-g-PAA-Ag) exhibited excellent hydrophilicity as well as antibacterial activity compared with the neat PLA film.

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Antibacterial Performance of Chitin Nanowhisker Reinforced Poly(lactic acid) Composite Nanofiber Membrane

Cited by 5 publications

References 0 publications

Effect of Chitin Nanocrystals on Crystallization and Properties of Poly(lactic acid)-Based Nanocomposites

Effect of Chitin Nanocrystals on Crystallization and Properties of Poly(lactic acid)-Based Nanocomposites

Enhancement of the Antibacterial Activity of Natural Rubber Latex Foam by Blending It with Chitin

Hydrophilic and Antibacterial Modification of Poly(lactic acid) Films by γ-ray Irradiation

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