Microfibrillated-cellulose-modified urea-formaldehyde adhesives with different F/U molar ratios for wood-based composites

Ayrılmış, Nadir; Kwon, Jin-Heon; Lee, Seung Hwan; Han, Tae-Hyung; Park, Chanwoo

doi:10.1080/01694243.2016.1175246

Cited by 34 publications

(16 citation statements)

References 17 publications

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“…The addition of highstiffness and high-surface area of nanocellulose to such soft polymers explicitly results in stiffening of the cured modified adhesive. Those related to the fact that the cellulose addition rapidly increased the viscosity of the adhesive, therefore, limit the amount of nanocellulose that can be added into the system (Veigel et al, 2012) and affect the formation of bond line thickness as the nanocellulose also fills the hole and irregularities in the wood surface, which decreasing the porosity (Ayrilmis et al, 2016). Table 6 summarizes the effect of nanocellulose addition on the wood adhesive characteristics.…”

Section: Nanocellulose In Wood Adhesivesmentioning

confidence: 99%

“…In that case, methods of extraction and surface modification of nanocellulose dictate the behavior of modified adhesive and affect the bonding strength within adhesive and wood. Microfibrillated cellulose (MFC), which produced by high mechanical shearing fibrillation resulted in non-charged longer fibrillated cellulose lead high viscosity due to an entangled network structure in the adhesive (Veigel et al, 2012;Ayrilmis et al, 2016). TEMPO [(2,2,6,6-tetramthylpiperidin-1-yl)oxyl]-mediated cellulose oxidation (TEMPO-CNF), a longer fibrillated negative surface charged promote well-dispersion in polar adhesive (Isogai et al, 2011).…”

Section: Nanocellulose In Wood Adhesivesmentioning

confidence: 99%

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Nanocellulose: From Fundamentals to Advanced Applications

et al. 2020

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Over the past few years, nanocellulose (NC), cellulose in the form of nanostructures, has been proved to be one of the most prominent green materials of modern times. NC materials have gained growing interests owing to their attractive and excellent characteristics such as abundance, high aspect ratio, better mechanical properties, renewability, and biocompatibility. The abundant hydroxyl functional groups allow a wide range of functionalizations via chemical reactions, leading to developing various materials with tunable features. In this review, recent advances in the preparation, modification, and emerging application of nanocellulose, especially cellulose nanocrystals (CNCs), are described and discussed based on the analysis of the latest investigations (particularly for the reports of the past 3 years). We start with a concise background of cellulose, its structural organization as well as the nomenclature of cellulose nanomaterials for beginners in this field. Then, different experimental procedures for the production of nanocelluloses, their properties, and functionalization approaches were elaborated. Furthermore, a number of recent and emerging uses of nanocellulose in nanocomposites, Pickering emulsifiers, wood adhesives, wastewater treatment, as well as in new evolving biomedical applications are presented. Finally, the challenges and opportunities of NC-based emerging materials are discussed.

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Section: Nanocellulose In Wood Adhesivesmentioning

confidence: 99%

Section: Nanocellulose In Wood Adhesivesmentioning

confidence: 99%

Nanocellulose: From Fundamentals to Advanced Applications

et al. 2020

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“…Although the curing treatment with hydrochloric acid improves the crosslinking degree of the resin to certain extent and reduces the flowing ability in the process of high‐temperature carbonization, it is still difficult for UFCM to preserve its spherical morphology and porous characteristics of UFM during carbonization process. The destruction of the interconnected porous structure is adverse to application as the supercapacitor electrode for UFCM …”

Section: Resultsmentioning

confidence: 98%

Silica‐assisted urea‐formaldehyde‐based carbon microspheres with enhanced supercapacitor performances as electrode

Yue

Yuan

Zhao

et al. 2019

J of Applied Polymer Sci

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Novel silica (SiO2)‐assisted urea‐formaldehyde‐based microspheres (SUFMs) have been successfully prepared by condensation polymerization with SiO2 nanoparticles as template. The support effect of SiO2 and the improved thermal stability of SUFM have been investigated. The SUFM is pyrolyzed at high temperature under Ar atmosphere to achieve its carbonized product (SUFCM), which retains its spherical morphology by alkali etching after carbonization. The SiO2 acts as a stabilizer that limits the flowing domain of the melt resin around the SiO2. When used as the electrode material for supercapacitors, the SUFCM exhibits excellent electrochemical performance with a high specific capacitance of 218 F g−1 at 1 A g−1 in 2 M H2SO4 aqueous electrolyte and a good rate capability of 138 F g−1 (63% capacitance retention) at 10 A g−1. More importantly, the SUFCM electrode demonstrates a robust long‐term stability without capacitance fading after 10,000 cycles. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48388.

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“…In a study on micro fibrillated-cellulose-urea-formaldehyde adhesives and its effect on the mechanical properties of laminated veneer lumber, the viscosity and gel time of the urea-formaldehyde adhesives increased with an increasing amount of the micro fibrillated-cellulose [41]. Limited amounts of the micro fibrillated-cellulose suspension in the urea-formaldehyde adhesive formulation significantly improved the mechanical performance of urea-formaldehyde bonds.…”

Section: Nanocellulose Application In Wood Adhesivesmentioning

confidence: 99%

Nanocellulose Applications in Wood Adhesives—Review

Vineeth¹,

Gadhave²,

Gadekar³

2019

OJPChem

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Bio-based materials open a new world of possibilities in every field due to its independence from the petrochemical origin. Moreover, concerns on environmental footprints and toxicity of synthetic adhesives made scientists investigate the utilization of biomaterials for wood adhesives. In this perspective, nanocellulose as a sustainable and cheap bio-nanomaterial provides a better alternative to conventional adhesive based on formaldehyde-containing condensation resins. Property of nanocellulose to act as both binders and as structural reinforcement in various adhesive systems adds to its potential. Besides by reducing the harmful emission of formaldehyde, it also can improve the mechanical properties and enhance performance of adhesives. This review paper aims to point out the potential application of nanocellulose based wood adhesives compared to petroleum-based conventional systems beyond renewability. New functionalities through structural modification in nanocellulose could bring a replacement with the synthetic adhesive systems which will play a significant role in future bio-economy.

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Microfibrillated-cellulose-modified urea-formaldehyde adhesives with different F/U molar ratios for wood-based composites

Abstract: a department of Wood Mechanics and Technology, forestry faculty, istanbul university, istanbul, Turkey; b department of forest Biomaterials engineering, college of forest and environmental sciences, Kangwon national university, chuncheon city, republic of Korea

Cited by 34 publications

References 17 publications

Nanocellulose: From Fundamentals to Advanced Applications

Nanocellulose: From Fundamentals to Advanced Applications

Silica‐assisted urea‐formaldehyde‐based carbon microspheres with enhanced supercapacitor performances as electrode

Nanocellulose Applications in Wood Adhesives—Review

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