Modification of cellulose/chitin mix fibers with <i>N</i>‐isopropylacrylamide and poly(<i>N</i>‐isopropylacrylamide) under cold plasma conditions

Sdrobiş, Anamaria; Ioanid, Ghiocel Emil; Stevanović, Tatjana; Vasile, Cornelia

doi:10.1002/pi.4268

Cited by 12 publications

(8 citation statements)

References 29 publications

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“…First category includes gas plasma and gamma radiation technologies, and is usually preferred in various applications [26]. The main advantage of these methods are represented by their ecofriendly feature, not involving toxic and corrosive solvents, their fast and safe use [27], and supplementary for plasma the fact that it acts only on the surface's outermost layers [28][29][30]. The mechanism of action of ionizing radiation on polymeric materials involves generation of radicals that may react with each other, with the atmospheric oxygen or with other compounds, and which may lead to polymerization, cross-linking, grafting or degradation processes [31].…”

Section: Introductionmentioning

confidence: 99%

Application of Vegetal Oils in Developing Bioactive Paper-Based Materials for Food Packaging

et al. 2021

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A major disadvantage of conventional food packaging materials is the difficulty in disposal and recycling, due to their high stability to environmental and thermal stress. The trend now is to develop new eco-friendly food packaging that can substitute fossil fuel derived materials. Cellulose, the main constituent of paper-based food packages, is a favorable starting material for such purpose. In this study we present a new method to obtain bioactive paper based materials suitable for food packaging applications. By combining eco-friendly activation processes (cold plasma or gamma irradiation) and bioactive plant oils (clove essential oil and rosehip seeds vegetal oil) for modification of kraft paper, new materials with antioxidant and antibacterial activity were obtained. The oil-loaded bioactive paper based materials presented increased hydrophobicity (from 97° in the case of kraft paper to 115° for oil-loaded sample) and decreased water adsorption (a one-quarter decrease). Due to differential interactions with the functional groups of plant oils, the modified kraft paper presents different antibacterial and antioxidant properties. Essential clove oil imprinted higher antioxidant activity (owing to the high content in eugenol and eugenol acetate phenolic compounds and were more efficient in reducing the bacterial growth on fresh beef meat and especially on fresh curd cheese. The cold pressed rosehip seeds oil acted as aslightly better antibacterial agent against Listeria monocytogenes (+), Salmonella enteritidis (-) and Escherichia coli (-) bacterial strains. Thus, the newly developed bioactive paper could be used as effective packaging material that can help preserving food quality for longer time.

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Section: Introductionmentioning

confidence: 99%

Application of Vegetal Oils in Developing Bioactive Paper-Based Materials for Food Packaging

et al. 2021

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“…Combination of these properties in Chitcel fibers could impart antimicrobial and pH responsiveness to the fibers. 18,19 The introduction of chitin in the blend fiber can improve the water-retention properties of the blend fiber compared to pure fiber. 33 To emphasize this pH responsiveness the swelling of fibers was achieved in several phosphate buffer solutions of different pH values: 1.2, 3.2, 4.3, 5.5, 7.4, and 9.0, at room temperature.…”

Section: Ph-responsive Charactermentioning

confidence: 99%

“…17 In our previous work, in order to obtain stimuli-responsive fibers, cold plasma activation followed by reaction with NIPAAm and PNIPAAm was applied to modify cellulose/chitin (CC) mix fibers. 18,19 This paper deals with the enzyme activations of CC mix fibers followed by the reaction with NIPAAm in order to establish the optimal conditions for the fiber's surface modification. The main aim of the study was to obtain new fibers with special properties.…”

Section: Introductionmentioning

confidence: 99%

Enzyme-assisted modification of cellulose/chitin fibers with NIPAAm

Irimia¹,

Csiszár²,

Dobromir³

et al. 2015

Turk J Chem

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Abstract:Coating processes are applied in order to improve coating adhesion and resistance to degradation. Covalently bound organic coatings rather than merely physically bound ones assure stable modification. In this study a novel twostep process was developed to modify cellulose/chitin mix fibers consisting of enzymatic activation with a commercial cellulase, followed by a coupling reaction with N-isopropylacrylamide (or poly (N-isopropylacrylamide)) in the presence of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide (EDC) and N-hydroxysuccinimide (NHS).Both enzyme-activated and subsequently modified samples were characterized by ATR-FTIR, XPS, and SEM.All obtained results confirm the structural and morphological changes of the fiber surface after the application of the two-step procedure. The particular responsiveness to temperature and to pH of the coated fibers was evidenced by following the swelling behavior. It was established that the swelling kinetics followed a Fickian behavior.

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“…PNIPAM brushes were successfully grafted through ATRP [69,128] and RAFT polymerization [90,93]. By introducing reactive groups through plasma treatments, PNIPAM can be grafted via "grafting to" amide binding [8] or surface initiated ATRP [81]. ATRP produced Si-PNIPAM brush hybrids which were shown to be efficient in the thermo-triggered adhesion/de-adhesion of fibroblast cells [128].…”

Section: Smart Bio-surfaces: Example Of Poly(n-isopropylacrylamide) Tmentioning

confidence: 99%

“…The introduction of reactive groups also permits compounds or chemical functions to be grafted onto the material surfaces. In the presence of oxygen, surfaces activated via the introduction of hydroxyl groups, can be grafted with monomers or polymers, such as NIPAM/PNIPAM though N-(3-dimethylaminopropyl)-N -ethylcarbodiimide (EDC)/N-hydroxysuccinimide (NHS) amide coupling [8]. Under argon plasma, radicals will be produced.…”

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confidence: 99%

PNIPAM grafted surfaces through ATRP and RAFT polymerization: Chemistry and bioadhesion

Conzatti

Cavalié

Combes

et al. 2017

Colloids and Surfaces B: Biointerfaces

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a b s t r a c tBiomaterials surface design is critical for the control of materials and biological system interactions. Being regulated by a layer of molecular dimensions, bioadhesion could be effectively tailored by polymer surface grafting. Basically, this surface modification can be controlled by radical polymerization, which is a useful tool for this purpose. The aim of this review is to provide a comprehensive overview of the role of surface characteristics on bioadhesion properties. We place a particular focus on biomaterials functionalized with a brush surface, on presentation of grafting techniques for "grafting to" and "grafting from" strategies and on brush characterization methods. Since atom transfer radical polymerization (ATRP) and reversible addition-fragmentation chain transfer (RAFT) polymerization are the most frequently used grafting techniques, their main characteristics will be explained. Through the example of poly(N-isopropylacrylamide) (PNIPAM) which is a widely used polymer allowing tuneable cell adhesion, smart surfaces involving PNIPAM will be presented with their main modern applications.

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Modification of cellulose/chitin mix fibers with N‐isopropylacrylamide and poly(N‐isopropylacrylamide) under cold plasma conditions

Cited by 12 publications

References 29 publications

Application of Vegetal Oils in Developing Bioactive Paper-Based Materials for Food Packaging

Application of Vegetal Oils in Developing Bioactive Paper-Based Materials for Food Packaging

Enzyme-assisted modification of cellulose/chitin fibers with NIPAAm

PNIPAM grafted surfaces through ATRP and RAFT polymerization: Chemistry and bioadhesion

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