Trends in Advanced Functional Material Applications of Nanocellulose

Panchal, Prachiben; Ogunsona, Emmanuel O.; Mekonnen, Tizazu H.

doi:10.3390/pr7010010

Cited by 115 publications

(77 citation statements)

References 121 publications

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“…Nanocellulose fibrils, which are the building blocks of plant cell [95] walls and give plants and trees their structural strength and stiffness, are a very interesting and well-studied nanoscale natural material that can potentially improve the properties of the polymers [96]. Many studies have already reported on use of nanocellulose in different forms for composite applications [70].…”

Section: Nanocellulosementioning

confidence: 99%

“…Many studies have already reported on use of nanocellulose in different forms for composite applications [70]. Cellulose nanomaterials are considered as a suitable solution to replace commonly used inorganic nanofillers [97] because they are widely available, renewable, and biodegradable [96]. Moreover, they possess unique valuable characteristics, such as a high specific strength, moduli (100-200 GPa), and specific surface area.…”

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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Section: Nanocellulosementioning

confidence: 99%

Section: Nanocellulosementioning

confidence: 99%

Vegetable Additives in Food Packaging Polymeric Materials

Munteanu

Vasile

2019

Polymers

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“…During testing, each sample was first held at 25 °C for 2 min before being heated up to 250 °C at 10 °C/min under N2. The Xc was then calculated using Equations (3) and 4:…”

Section: Degree Of Crystallinitymentioning

confidence: 99%

“…Natural fibers exhibit many excellent properties and are low-density materials, which probably lead to lightweight composites with a high specific strength and modulus. Natural fibers also offer significant cost advantages and easy processing along with being a highly biodegradable resource, as well as reducing the pollution to the environment [1][2][3]. Ramie fibers as one of the high-performance natural fibers [4] were selected and used in this work for the purpose of reinforcement of the resin.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Performance of Different Modified Ramie Fabrics Reinforced Anionic Polyamide-6 Composites

et al. 2019

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Anionic polyamide-6 (APA-6) composites are prepared by the VARIM process using different modified ramie fabrics to study the structure and properties of different composites. This study can not only evaluate the optimal modification method for the ramie fabrics, but also further explore the interface interaction mechanism between ramie fabrics and APA-6. In this article, the ramie fabrics are modified by a pretreatment, coupling agent and alkali modification. Different modification methods have different effects on the structure, surface properties and mechanical properties of ramie fabrics, which will further affect the impregnation process, interfacial and mechanical properties of the composites. Through the performance analysis of different modified ramie fabrics reinforced APA-6 composites, the conversion, crystallinity and molecular weight of these composites are at a high level, which indicate that the polymerization of these composites is well controlled. The coupling agent modified ramie fabrics composites and the pretreated ramie fabrics composites have higher flexural modulus, tensile strength and dynamic mechanical properties. Alkali-modified ramie fabrics composites have slightly lower mechanical properties, which however have the highest interlaminar shear strength and outperformed interface properties of the composites.

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“…Panchal et al [8] show that nanocellulose, in the form of cellulose nanocrystals and cellulose nanofibers, obtained by the deconstruction of fibers from wood or other cellulosic plants, are very appealing materials for functional material applications. This is because of their sustainability attributes, excellent mechanical properties owing to their crystalline assembly, and their abundant surface hydroxyl groups, which make them amenable to chemical modification.…”

mentioning

confidence: 99%