Chemically modified cellulose nanofibril as an additive for two‐component polyurethane coatings

Virtanen, Sanna; Jämsä, Saila; Talja, Riku; Heikkinen, Hanna; Vuoti, Sauli

doi:10.1002/app.44801

Cited by 10 publications

(3 citation statements)

References 55 publications

(84 reference statements)

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“…HMDS-grafted CNFs were evaluated as a reinforcing filler for the water-and solvent-based two-component PU lacquer coatings. 311 Si-CNFs incorporated PU coatings were reported to have improved abrasion resistance, strength, and elasticity. To improve the adhesion of CNF films on glass and aluminium substrates, functionalization with various silane containing dissimilar functional groups, i.e., epoxy, methacryloxy, and amino groups, was carried out.…”

Section: Emerging Applications 421 Stimuli-responsive Materialsmentioning

confidence: 99%

Graft onto approaches for nanocellulose-based advanced functional materials

Yadav,

Lee,

Mohanty

et al. 2023

Nanoscale

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Section: Emerging Applications 421 Stimuli-responsive Materialsmentioning

confidence: 99%

Graft onto approaches for nanocellulose-based advanced functional materials

Yadav,

Lee,

Mohanty

et al. 2023

Nanoscale

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“…The modified BC showed anti-bacterial activity against Staphylococcus aureus (gram-positive bacteria). Virtanen et al [426] carried out the silylation of CNF and studied its effects on CNF physiochemical properties. Silylation increases the CNF hydrophobicity, oxygen permeation, and film-forming ability.…”

Section: Ex-situ Modificationsmentioning

confidence: 99%

Biomedical engineering aspects of nanocellulose: a review

Rai

Dhar

2022

Nanotechnology

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Cellulose is one of the most abundant renewable biopolymer in nature and is present as major constituent in both plant cell walls as well as synthesized by some microorganisms as extracellular products. In both the systems, cellulose self-assembles into a hierarchical ordered architecture to form micro to nano-fibrillated structures, on basis of which it is classified into various forms. Nanocellulose (NCs) exist as rod-shaped highly crystalline cellulose nanocrystals (CNC) to high aspect ratio cellulose nanofibers (CNF), micro-fibrillated cellulose (MFC) and bacterial cellulose (BC), depending upon the origin, structural and morphological properties. Moreover, NCs have been processed into diversified products ranging from composite films, coatings, hydrogels, aerogels, xerogels, organogels, rheological modifiers, optically active birefringent colored films using traditional-to-advanced manufacturing techniques. With such versatility in structure-property, NCs have profound application in areas of healthcare, packaging, cosmetics, energy, food, electronics, bioremediation, and biomedicine with promising commercial potential. Herein this review, we highlight the recent advancements in synthesis, fabrication, processing of NCs, with strategic chemical modification routes to tailor its properties for targeted biomedical applications. We also study the basic mechanism and models for biosynthesis of cellulose in both plant and microbial systems and understand the structural insights of NC polymorphism. The kinetics study for both enzymatic/chemical modifications of NCs and microbial growth behavior of BC under various reactor configurations are studied. The challenges associated with the commercial aspects as well as industrial scale production of pristine and functionalized NCs to meet the growing demands of market are discussed and prospective strategies to mitigate them are described. Finally, post chemical modification evaluation of biological and inherent properties of NC are important to determine their efficacy for development of various products and technologies directed for biomedical applications.

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“…bacterial cellulose and its oxidation product, microcrystalline cellulose, modified cellulose using hydrophobic substrate [22][23][24][25][26][27] . In the previous work, NCC has been applied as a reinforcing agent in the waterborne coating formulation 28 . However, no studies could be found yet on the NCC that isolated from the LEFB and its role to stabilize the emulsion of cyclized natural rubber (CNR).…”

Section: Introductionmentioning

confidence: 99%

Oil Palm-Based Nanocrystalline Cellulose in the Emulsion System of Cyclic Natural Rubber

Mahendra¹,

Wirjosentono²,

Tamrin³

et al. 2019

RJC

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The oil palm's nanocrystalline cellulose (NCC) has been successfully isolated and characterized, also it has been applied in the emulsion system of cyclic natural rubber (CNR). Nanocrystalline cellulose (NCC) has been isolated and characterized from the lower part of empty fruit bunches (LEFB) by acid hydrolysis and followed by ultrasonication treatment. The obtained NCC has characteristic, such as (i) the crystallinity index of NCC was 77.84% and the dimension of NCC was 30-450 nm and 20-35 nm of length and width, respectively. The utilization of NCC in the emulsion's system of CNR can improve the stability of the emulsion system that measured by ESI value. The emulsion's system of CNR has divided into two groups based on the type of surfactants, such as Tween 80 and Lutrol F127. In the emulsion that prepared by Tween 80, at 28 th days after the addition of NCC (2-29% of fibril dosages), the ESI value was in the range 70-100% and linear with the fibril dosages.

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Chemically modified cellulose nanofibril as an additive for two‐component polyurethane coatings

Cited by 10 publications

References 55 publications

Graft onto approaches for nanocellulose-based advanced functional materials

Graft onto approaches for nanocellulose-based advanced functional materials

Biomedical engineering aspects of nanocellulose: a review

Oil Palm-Based Nanocrystalline Cellulose in the Emulsion System of Cyclic Natural Rubber

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