Mechanical reinforcement and thermal properties of PVA tricomponent nanocomposites with chitin nanofibers and cellulose nanocrystals

Irvin, Cameron W.; Satam, Chinmay C.; Meredith, J. Carson; Shofner, Meisha L.

doi:10.1016/j.compositesa.2018.10.028

Cited by 62 publications

(53 citation statements)

References 56 publications

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“…Chitin whiskers have attracted much attention due to their unique cationic nature, which paves the way to synergistic associations with counter-charged nanofillers (e.g. cellulose) (Irvin et al, 2019). Chitin whiskers have been used to reinforce many polymeric matrices, including hydrocolloids such as chitosan , alginate (Watthanaphanit et al, 2008) and cellulose (Huang et al, 2013).…”

Section: Chitin-based Fillersmentioning

confidence: 99%

A review of current and future food applications of natural hydrocolloids

Yemenicioğlu

Farris

Türkyılmaz

et al. 2019

Int J of Food Sci Tech

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Summary The main aim of this review paper was to focus on current and potential future sources and food applications of natural hydrocolloids in the food industry. The emerging research trends, problems, new methods and alternative approaches in production, environmental concerns, market trends and newly discovered health benefits have been discussed for natural hydrocolloids of commercial relevance. The rheological and surface active properties, interactions, functional properties, films and coatings, encapsulation applications and nanotechnology uses of natural hydrocolloids have been discussed in the light of recent developments. This review also reflected the most up‐to‐date concepts of applying natural hydrocolloids to meet consumer's and food sector's sophisticated demands related to food products.

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Section: Chitin-based Fillersmentioning

confidence: 99%

A review of current and future food applications of natural hydrocolloids

Yemenicioğlu

Farris

Türkyılmaz

et al. 2019

Int J of Food Sci Tech

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“…There is also a possibility to tune the mechanical properties through the introduction of a second nanofiller (for example carbon nanotubes together with montmorillonites [131]). Tricomponent materials containing poly(vinyl alcohol) (PVA) and cellulose nanocrystals (CNC)/chitin nanofibers (ChNF) as filler (total filler content 5 wt %) [132] showed an overall increase in stiffness, tensile strength, and thermal stability [132]. Furthermore, CNC /ChNF mixtures at certain ratios were able to more effectively reinforce PVA better than CNC or ChNF alone [132].…”

Section: Nanocellulosementioning

confidence: 99%

“…Tricomponent materials containing poly(vinyl alcohol) (PVA) and cellulose nanocrystals (CNC)/chitin nanofibers (ChNF) as filler (total filler content 5 wt %) [132] showed an overall increase in stiffness, tensile strength, and thermal stability [132]. Furthermore, CNC /ChNF mixtures at certain ratios were able to more effectively reinforce PVA better than CNC or ChNF alone [132]. Results showed certain ratios between cellulose and chitin had the largest moduli and tensile strength.…”

Section: Nanocellulosementioning

confidence: 99%

“…Results showed certain ratios between cellulose and chitin had the largest moduli and tensile strength. The authors suggested this is the result of chitin nanofibers binding to themselves through hydrogen bonding and also creating a high strength network with the CNC [132]. The authors also suggested that above certain CNC loadings (1 wt %) agglomeration occurs between particles which generates weak points in the material, which could explain the relative decrease in mechanical properties with loadings higher than 1 wt % [132,133].…”

Section: Nanocellulosementioning

confidence: 99%

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Vegetable Additives in Food Packaging Polymeric Materials

Munteanu

Vasile

2019

Polymers

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Plants are the most abundant bioresources, providing valuable materials that can be used as additives in polymeric materials, such as lignocellulosic fibers, nano-cellulose, or lignin, as well as plant extracts containing bioactive phenolic and flavonoid compounds used in the healthcare, pharmaceutical, cosmetic, and nutraceutical industries. The incorporation of additives into polymeric materials improves their properties to make them suitable for multiple applications. Efforts are made to incorporate into the raw polymers various natural biobased and biodegradable additives with a low environmental fingerprint, such as by-products, biomass, plant extracts, etc. In this review we will illustrate in the first part recent examples of lignocellulosic materials, lignin, and nano-cellulose as reinforcements or fillers in various polymer matrices and in the second part various applications of plant extracts as active ingredients in food packaging materials based on polysaccharide matrices (chitosan/starch/alginate).In this review various recent applications of plant-based additives (lignocellulosic fibers/nano-cellulose as well as bioactive plant extracts) as reinforcements and active ingredients in food packaging materials are illustrated. Natural polysaccharide biopolymers (such as chitosan/starch/alginate) are nontoxic, biodegradable, biocompatible, and largely used in food packaging: Chitosan is known for its broad antimicrobial activity and its excellent film-forming properties; alginates have good film-forming properties, retain moisture, reduce microbial counts, and retard oxidative off-flavors; and starch is also particularly important for its cheap price and its frequency in nature. For these reasons, this review will present applications of plant extracts as active ingredients in natural polysaccharide biopolymers: chitosan/starch/alginate. Classification of Natural Biodegradable Polymers and AdditivesNatural biodegradable polymers and additives are polymers formed naturally by the living organisms by enzyme-catalyzed reactions and reactions of chain growth from monomers which are formed inside the cells by complex metabolic processes [5].Natural additives can be high molecular weight (natural polymers), such as proteins (collagen, silk, and keratin), carbohydrates (starch and glycogen), lignin, cellulose, high molecular weight phenolics (tannins and derivatives), and low molecular weight active substances, such as cold-pressed oils, essential oils (organic volatile compounds, generally of low molecular weight,

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“…Cellulose, the most abundant natural polymer on earth, is a low cost, nontoxic, biocompatible, and biodegradable polymer, and has been widely used in various composites [1][2][3]. Besides cellulose derived from trees, cotton, straw and other plant sources, some Gram-negative species of bacteria (BA) such as Gluconacetobacter, Acetobacter, Salmonella, Achromobacter, Pseudomonas, Sarcina, Azobacter, Rhizobium, Agrobacterium, and Alcaligenes [4], also produce cellulose, which is named Bacterial Cellulose (BC).…”

Section: Introductionmentioning

confidence: 99%

Biofabrication of a novel bacteria/bacterial cellulose composite for improved adsorption capacity

Wan

Wang

Gama

et al. 2019

Composites Part A: Applied Science and Manufacturing

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A B S T R A C TConventional fabrication of bacterial cellulose (BC) involves treatment with hot NaOH aqueous solutions to remove bacteria (BA). Herein, we report a simpler and cheaper method for the preparation of BA/BC composite without alkalization, which keeps the BA in the nanofibrous BC network. Scanning electron microscopy (SEM) observation showed naturally distributed BA in BC matrix with a tightly entangled structure. Such BA-embedded BA/BC composite exhibited improved mechanical strength and modulus over BC. When used as adsorbent, the BA/BC composite exhibited significantly higher adsorption capacities to Pb(II), Cu(II), Ni(II), and Cr(VI) compared to bare BC. The much higher adsorption capacities of BA/BC are due to the presence of functional groups in the BA, such as amide, which are known to be involved in coordination interaction. This breakthrough strategy not only made the fabrication process simpler and more cost-effective, but also produced a new BCbased adsorbent with improved adsorption capacity to heavy metals.

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Mechanical reinforcement and thermal properties of PVA tricomponent nanocomposites with chitin nanofibers and cellulose nanocrystals

Cited by 62 publications

References 56 publications

A review of current and future food applications of natural hydrocolloids

A review of current and future food applications of natural hydrocolloids

Vegetable Additives in Food Packaging Polymeric Materials

Biofabrication of a novel bacteria/bacterial cellulose composite for improved adsorption capacity

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