Polyvinyl alcohol/chitosan hydrogels with enhanced antioxidant and antibacterial properties induced by lignin nanoparticles

Yang, Weijun; Fortunati, Elena; Bertoglio, Federico; Owczarek, J.S.; Bruni, Giovanna; Kozanecki, Marcin; Kenny, J. M.; Torre, Luigi; Visai, Livia; Puglia, Debora

doi:10.1016/j.carbpol.2017.10.084

Cited by 234 publications

(115 citation statements)

References 47 publications

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“…nanoparticles [39]. Many recent researches reported that lignin showed antibacterial properties in biocomposites [40][41][42]. The antibacterial activity of NAL redistributed filter paper was assessed in this work.…”

Section: Antibacterial Activity Of Deposited Papermentioning

confidence: 99%

Lignin Redistribution for Enhancing Barrier Properties of Cellulose-Based Materials

et al. 2019

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Renewable cellulose-based materials have gained increasing interest in food packaging because of its favorable biodegradability and biocompatibility, whereas the barrier properties of hydrophilic and porous fibers are inadequate for most applications. Exploration of lignin redistribution for enhancing barrier properties of paper packaging material was carried out in this work. The redistribution of nanolized alkali lignin on paper surface showed excellent water, grease, and water vapor barrier. It provided persisted water (contact angle decrease rate at 0.05°/s) and grease (stained area undetectable at 72 h) resistance under long-term moisture or oil direct contact conditions, which also inhibited the bacterial growth to certain degree. Tough water vapor transmission rate can be lowered 82% from 528 to 97 g/m2/d by lignin redistribution. The result suggests that alkali lignin, with multiple barrier properties, has great potential in bio-based application considering the biodegradability, biocompatibility, and recyclability.

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Section: Antibacterial Activity Of Deposited Papermentioning

confidence: 99%

Lignin Redistribution for Enhancing Barrier Properties of Cellulose-Based Materials

et al. 2019

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“…Lignin is polymerized from three hydroxycinnamyl alcohols, p‐coumaryl, coniferyl, and sinapyl alcohols . It comprises 20–30% of plant cell walls, forming a cross‐linked network surrounding cellulose and hemicelluloses, providing strength, and featuring antimicrobial, antioxidant, and UV absorbing properties . In particular, the antimicrobial activity of lignin lies in their phenolic components, particularly the side chain structure and nature of functional groups, and the most common bactericide mechanism is disintegration of cell membrane and subsequent release of cell contents …”

Section: Organic Antimicrobial Nanostructuresmentioning

confidence: 99%

“…Citric acid modification of LNPs may enhance dispersibility in polar matrices . LNP‐containing films are effective against G(−) and G(+) bacteria . Moreover, LNPs may enhance mechanical properties, thermal stability, and UV light barrier of films, while keeping a reasonable transparency to visible light .…”

Section: Organic Antimicrobial Nanostructuresmentioning

confidence: 99%

“…LNP‐containing films are effective against G(−) and G(+) bacteria . Moreover, LNPs may enhance mechanical properties, thermal stability, and UV light barrier of films, while keeping a reasonable transparency to visible light . LNPs have also been used as lignin‐core NPs doped with Ag + ions and surface stabilized with a cationic electrolyte to promote adhesion to bacterial membranes .…”

Section: Organic Antimicrobial Nanostructuresmentioning

confidence: 99%

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Nanostructured Antimicrobials in Food Packaging—Recent Advances

Azeredo

Otoni

Corrêa

et al. 2019

Biotechnology Journal

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Active food packaging systems promote better food quality and/or stability, such as by releasing antimicrobial agents into food. Advantages of adding antimicrobials to the packaging material instead of into the bulk food include controlled diffusion, reduced antimicrobial contents, and improved cost effectiveness. Nanostructured antimicrobials are especially effective due to their high specific surface area. The present review is focused on recent advances and findings on the main nanostructured antimicrobial packaging systems for food packaging purposes. Several kinds of nanostructures, including both inorganic particles and organic structures, have been proven effective antimicrobials by different mechanisms of action and with different application scopes. Moreover, there are systems containing nanocarriers to protect antimicrobials and deliver them in a controlled fashion. On the other hand, scientific data about migration of nanostructures onto food and their toxicity are still limited, requiring special attention from researchers and regulation sectors.

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“…Studies have shown that the use of natural polymers along with nanomaterials can significantly improve these deficiencies . Among natural polymers, chitosan (CS) is used in conjunction with PVA because of its medical applications and features such as biocompatibility, biodegradability, antimicrobial properties, and nontoxicity . Also, incorporation of nanofillers such as nanoclay can improve the performance of natural polymeric hydrogels .…”

Section: Introductionmentioning

confidence: 99%

Physicomechanical and antimicrobial characteristics of hydrogel based on poly(vinyl alcohol): Performance improvement via inclusion of chitosan‐modified nanoclay

Entezam

Ehghaghiyan

Sedeh

et al. 2019

J of Applied Polymer Sci

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The effect of a chitosan-modified nanoclay (CMNC) on the physical, mechanical, and antimicrobial properties of poly(vinyl alcohol) (PVA) hydrogels prepared by the electron beam irradiation method is reported in comparison with pristine nanoclay (PNC). The X-ray diffraction (XRD) results confirm that the chitosan modification process of nanoclay led to an enhancement in the clay gallery spacing. The inclusion of nanoclays in the PVA matrix decreased the gel content while it increased the swelling degree of the hydrogels. Both PNC and CMNC played a role, depending on their amounts, in swelling of the hydrogel. The swelling kinetic studies revealed a diffusion-controlled swelling process. The diffusion coefficient of water molecules in hydrogels was decreased in the presence of PNC, while it increased with CMNC. Rheological investigations verified the influential role of nanoclays in decreasing the chemical crosslink density of the hydrogel. CMNC exhibited a higher reinforcing effect on hydrogel mechanical properties than PNC did, although the rheological analysis, in agreement with the XRD results, indicated a better dispersion of PNC in the PVA matrix. According to the antimicrobial tests, perfect inhibition of bacteria growth was obtained only for the hydrogels with CMNC.

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Polyvinyl alcohol/chitosan hydrogels with enhanced antioxidant and antibacterial properties induced by lignin nanoparticles

Cited by 234 publications

References 47 publications

Lignin Redistribution for Enhancing Barrier Properties of Cellulose-Based Materials

Lignin Redistribution for Enhancing Barrier Properties of Cellulose-Based Materials

Nanostructured Antimicrobials in Food Packaging—Recent Advances

Physicomechanical and antimicrobial characteristics of hydrogel based on poly(vinyl alcohol): Performance improvement via inclusion of chitosan‐modified nanoclay

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