Preparation of nanofibrillated cellulose and nanocrystalline cellulose from surgical cotton and cellulose pulp in hot-glycerol medium

Ayothi, Ramakrishnan; Ravishankar, K.; Dhamodharan, R.

doi:10.1007/s10570-019-02312-4

Cited by 29 publications

(21 citation statements)

References 44 publications

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“…Different from conventional cellulose materials, CNMs possess unique characteristics, such as nano-scale size, special morphology and geometrical shapes, high aspect ratio, crystallinity, high specific surface area, impressive stiffness and strength, dimensional stability, liquid crystalline behavior, alignment and orientation, low coefficient of thermal expansion, and surface chemistry tunability [ 165 , 166 ]. These features combined with abundance and renewability of cellulose make CNMs an important class of futuristic materials with several potential commercial applications including nanocomposite materials, biomedical products, cements, food packaging, antimicrobial materials, energy storage (e.g., supercapacitors), and electronics devices [ 8 , 167 , 168 , 169 , 170 , 171 , 172 ].…”

Section: Surface Modification Of Cellulose and Cellulose Bioproductsmentioning

confidence: 99%

Production and Surface Modification of Cellulose Bioproducts

Liyanage¹,

Acharya²,

Parajuli³

et al. 2021

Polymers

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Petroleum-based synthetic plastics play an important role in our life. As the detrimental health and environmental effects of synthetic plastics continue to increase, the renewable, degradable and recyclable properties of cellulose make subsequent products the “preferred environmentally friendly” alternatives, with a small carbon footprint. Despite the fact that the bioplastic industry is growing rapidly with many innovative discoveries, cellulose-based bioproducts in their natural state face challenges in replacing synthetic plastics. These challenges include scalability issues, high cost of production, and most importantly, limited functionality of cellulosic materials. However, in order for cellulosic materials to be able to compete with synthetic plastics, they must possess properties adequate for the end use and meet performance expectations. In this regard, surface modification of pre-made cellulosic materials preserves the chemical profile of cellulose, its mechanical properties, and biodegradability, while diversifying its possible applications. The review covers numerous techniques for surface functionalization of materials prepared from cellulose such as plasma treatment, surface grafting (including RDRP methods), and chemical vapor and atomic layer deposition techniques. The review also highlights purposeful development of new cellulosic architectures and their utilization, with a specific focus on cellulosic hydrogels, aerogels, beads, membranes, and nanomaterials. The judicious choice of material architecture combined with a specific surface functionalization method will allow us to take full advantage of the polymer’s biocompatibility and biodegradability and improve existing and target novel applications of cellulose, such as proteins and antibodies immobilization, enantiomers separation, and composites preparation.

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Section: Surface Modification Of Cellulose and Cellulose Bioproductsmentioning

confidence: 99%

Production and Surface Modification of Cellulose Bioproducts

Liyanage¹,

Acharya²,

Parajuli³

et al. 2021

Polymers

View full text Add to dashboard Cite

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“…Thanks to their small size could possibly reduce inner fiber spacing, prevent micro-cracking and therefore increase the strength of the matrix [ 68 ]. They can also increase the flexural strength of cement paste about 50% [ 71 ], increase the compressive strength by 27% [ 72 ] and 44% when surface modified [ 73 ]. Possibly they can increase the degree of hydration, especially at early age [ 74 ], because they could provide a channel for water transporting through the hydration products ring to the unhydrated cement particles [ 68 ].…”

Section: Nanomaterials Typically Used In Cement-based Materialsmentioning

confidence: 99%

Nanomaterials in Cementitious Composites: An Update

et al. 2021

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This review is an update about the addition of nanomaterials in cementitious composites in order to improve their performance. The most common used nanomaterials for cementitious materials are carbon nanotubes, nanocellulose, nanographene, graphene oxide, nanosilica and nanoTiO2. All these nanomaterials can improve the physical, mechanical, thermal and electrical properties of cementitious composites, for example increase their compressive and tensile strength, accelerate hydration, decrease porosity and enhance fire resistance. Cement based materials have a very complex nanostructure consisting of hydration products, crystals, unhydrated cement particles and nanoporosity where traditional reinforcement, which is at the macro and micro scale, is not effective. Nanomaterials can reinforce the nanoscale, which wasn’t possible heretofore, enhancing the performance of the cementitious matrix.

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“…In a top‐down approach, the amorphous region of cellulose could be selectively removed to isolate rigid rod‐like CNCs by physical cutting and peeling, and chemical acid hydrolysis and oxidation. CNFs could also be isolated by these methods, which have a higher aspect ratio and characteristic of flexure 3 . Meanwhile, through a down‐top method of microorganism system, another nanoscale crystalline cellulose, i.e.…”

Section: Introductionmentioning

confidence: 99%

Surface modification of cellulose nanocrystals towards new materials development

Shi

et al. 2021

J of Applied Polymer Sci

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Cellulose nanocrystals (CNCs) are a kind of sustainable nanoparticle from biomass, which are widely used as reinforcing filler and assembly building block for high‐performance composites and function materials including biomaterial, optics, and so forth. Here, their unique advantages in material applications were reviewed based on their rod‐like morphology, crystalline structure, dimension‐related effects, and multi‐level order structure. Then, we focused on the molecular engineering of CNCs, including the structure and physicochemical properties of their surface, along with surface modification methods and steric effects. We further discussed the performance‐improvement and functionalization methods based on multi‐component complex systems, together with the effects of surface molecular engineering on the performance and functions. Meanwhile, methods of optimizing orientation in uniaxial arrays were discussed along with those of enhancing photoluminescence efficiency via surface chemical modification and substance coordination. In the end, we prospected the design, development, and construction methods of new CNCs materials.

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Preparation of nanofibrillated cellulose and nanocrystalline cellulose from surgical cotton and cellulose pulp in hot-glycerol medium

Cited by 29 publications

References 44 publications

Production and Surface Modification of Cellulose Bioproducts

Production and Surface Modification of Cellulose Bioproducts

Nanomaterials in Cementitious Composites: An Update

Surface modification of cellulose nanocrystals towards new materials development

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