Cellulose nanofibrils improve the properties of all-cellulose composites by the nano-reinforcement mechanism and nanofibril-induced crystallization

e aim of this study was to develop a chitosan/cellulose nano bril (CNF) nanocomposite and evaluate its e ect on strawberry's postharvest quality after coating. From the results of color, thickness, and scanning electron microscopy (SEM) and permeability to water vapor analyses, the best lm formulation for coating strawberries was determined. ree coating formulations were prepared: 1% chitosan, 1% chitosan + 3% CNF, and 1% chitosan + 5% CNF. e strawberries were immersed in the lmogenic solutions and kept under cold storage (1 ± 1°C). e color of the lm was not a ected by increased concentration of cellulose nano brils; however, the thickness and water vapor permeability were a ected by the CNF addition. e coating with the highest CNF concentration performed better in reducing fruit mass and rmness loss. e color was positively in uenced by the addition of the coating, regardless of formulation, as well as soluble solid content, PG enzymatic activity, and the fruit appearance. e pH and titratable acidity showed no signi cant di erence among treatments. It was observed that the vitamin C, phenolic compounds, and anthocyanin content, as well as the PAL activity and the antioxidant activity (except for % protection), were a ected by chitosan coating, however not by the addition of CNFs.

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“…It is noteworthy that cellulose nanocomposites are one of the most promising structures to the packaging field [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Chitosan/Cellulose Nanofibril Nanocomposite and Its Effect on Quality of Coated Strawberries

Resende

Gonçalves²,

Reis

et al. 2018

Journal of Food Quality

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“…Nishino c.s., [125,133] created transparent all-cellulose composites by partial surface dissolution of cellulose fibers, with dissolved fiber material filling the spaces between the fibers, creating strong and transparent composites ( Figure 7G-H). Research by Yano c.s., [134,157] Berglund c.s., [135][136][137] and others [158,159] reported transparent nanocomposite films based on bacterial cellulose and other forms of nanocellulose. Here, nanocellulose fibrous networks are typically impregnated with resins to introduce transparency.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Transparent semi‐crystalline polymeric materials and their nanocomposites: A review

Lin

Bilotti

Bastiaansen

et al. 2020

Polymer Engineering & Sci

108

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Optical transparency is an important property for a material, especially in certain fields like packaging, glazing, and displays. Existing commercial transparent polymeric materials are mostly amorphous. Semicrystalline polymers have often-superior chemical resistance and mechanical properties particularly at elevated temperatures or after solid-state drawing but they appear opaque or white in most cases. This review describes the present state-of-the-art of methodologies of fabricating optically transparent materials from semicrystalline polymers. A distinction is made between isotropic, biaxially stretched, and uniaxially stretched semicrystalline polymers. Furthermore, some functionalities of transparent nanocomposites based on semicrystalline polymers are also discussed. This review aims to provide guidelines regarding the principles of manufacturing transparent high-performance semicrystalline polymers and their nanocomposites for potential applications in fields like packaging, building, and construction, aerospace, automotive, and opto-electronics.

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“…NC films also show excellent oxygen barrier properties related to the high crystallinity, a network structure held together through strong inter- and intramolecular hydrogen bonds, a lamellar nanofiber structure, and dense fiber bundles [ 156 , 157 , 158 ]. CNFs have also been used as filler in all-cellulose nanocomposite films [ 139 , 159 ]. In addition, NC, as a dietary fiber, can be used in functional foods to reduce the risk of chronic diseases such as diabetes, obesity, cardiovascular disease, and diverticulitis.…”

Section: Market and Applicationsmentioning

confidence: 99%

Nanocellulose Production: Exploring the Enzymatic Route and Residues of Pulp and Paper Industry

et al. 2020

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Increasing environmental and sustainability concerns, caused by current population growth, has promoted a raising utilization of renewable bio-resources for the production of materials and energy. Recently, nanocellulose (NC) has been receiving great attention due to its many attractive features such as non-toxic nature, biocompatibility, and biodegradability, associated with its mechanical properties and those related to its nanoscale, emerging as a promising material in many sectors, namely packaging, regenerative medicine, and electronics, among others. Nanofibers and nanocrystals, derived from cellulose sources, have been mainly produced by mechanical and chemical treatments; however, the use of cellulases to obtain NC attracted much attention due to their environmentally friendly character. This review presents an overview of general concepts in NC production. Especial emphasis is given to enzymatic hydrolysis processes using cellulases and the utilization of pulp and paper industry residues. Integrated process for the production of NC and other high-value products through enzymatic hydrolysis is also approached. Major challenges found in this context are discussed along with its properties, potential application, and future perspectives of the use of enzymatic hydrolysis as a pretreatment in the scale-up of NC production.

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Cellulose nanofibrils improve the properties of all-cellulose composites by the nano-reinforcement mechanism and nanofibril-induced crystallization

Cited by 72 publications

References 45 publications

Chitosan/Cellulose Nanofibril Nanocomposite and Its Effect on Quality of Coated Strawberries

Chitosan/Cellulose Nanofibril Nanocomposite and Its Effect on Quality of Coated Strawberries

Transparent semi‐crystalline polymeric materials and their nanocomposites: A review

Nanocellulose Production: Exploring the Enzymatic Route and Residues of Pulp and Paper Industry

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