Cottonseed protein-based wood adhesive reinforced with nanocellulose

In the effort toward sustainable advanced functional materials, nanocelluloses have attracted extensive recent attention. Nanocelluloses range from rod‐like highly crystalline cellulose nanocrystals to longer and more entangled cellulose nanofibers, earlier denoted also as microfibrillated celluloses and bacterial cellulose. In recent years, they have spurred research toward a wide range of applications, ranging from nanocomposites, viscosity modifiers, films, barrier layers, fibers, structural color, gels, aerogels and foams, and energy applications, until filtering membranes, to name a few. Still, nanocelluloses continue to show surprisingly high challenges to master their interactions and tailorability to allow well‐controlled assemblies for functional materials. Rather than trying to review the already extensive nanocellulose literature at large, here selected aspects of the recent progress are the focus. Water interactions, which are central for processing for the functional properties, are discussed first. Then advanced hybrid gels toward (multi)stimuli responses, shape‐memory materials, self‐healing, adhesion and gluing, biological scaffolding, and forensic applications are discussed. Finally, composite fibers are discussed, as well as nanocellulose as a strategy for improvement of photosynthesis‐based chemicals production. In summary, selected perspectives toward new directions for sustainable high‐tech functional materials science based on nanocelluloses are described.

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“…[ 270 ] In cotton‐seed protein‐based adhesives, ≈2% CNF gave a 22% improvement in dry adhesive strength. [ 271 ]…”

Section: Nanocellulose‐based Hybrid and Functional Hydrogelsmentioning

confidence: 99%

Nanocellulose: Recent Fundamental Advances and Emerging Biological and Biomimicking Applications

et al. 2020

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“…The work concluded that optimum content of CNF and its type are one factor influencing the properties of adhesive. hesives, CNF, and CNC at varying concentrations was investigated by Cheng et al [60]. With 2% addition of CNF showed 22% improvement in dry adhesive strength, while for CNC 10% concentration improved adhesive performance by about 16%.…”

Section: Modification Of Wood Adhesives With Nanocellulosementioning

confidence: 99%

Chemical Modification of Nanocellulose in Wood Adhesive: Review

Vineeth¹,

Gadhave²,

Gadekar³

2019

OJPChem

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Bio-based nanomaterial is more attractive, due to its abundance, eco-friendliness and sustainability, when compared to the non-renewable toxic petrochemicals used in the wood adhesive sector. Recent studies on the formaldehyde emission by petrochemical binders in wood adhesives have attracted scientists for the research in biomaterial-based binders. In this aspect nanocellulose (NC) is one such material which has reinforcing ability and has natural binding properties. Conventional wood adhesive uses petrochemical-based binders and additives. Inclusion of nanocellulose in wood adhesive could drastically reduce the dependency on non-renewable petroleum sources. Even though wood adhesive uses NC for improving mechanical properties of the adhesive, usage is restricted because of its inability to enhance tackiness and adhesion compared with petrochemicals. Availability of free hydroxyl groups and feasibility for modification can be a potential way for functionalization of this nanomaterial. To improve adhesion properties and to make nanocellulose act as a functional filler, the crosslinking approach can be a possible solution. Enhancement of thermal properties with improved thermal degradation, water barrier properties of crosslinked films and enhanced mechanical properties especially in crosslinked poly (vinyl alcohol) (PVA) matrix, which is one of the binders for wood adhesive discussed in this review paper proves the potential applicability of crosslinked NC. Hence by inclusion of NC in wood adhesive and crosslinking with the binder, both mechanical and performance properties are expected to enhance which will create a new world and possibilities for the bio-based eco-friendly wood adhesives. In this review paper, we have reviewed the crosslinking of nanocellulose to enhance the performance of wood adhesives.

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“…NC possesses excellent useful properties such as renewability, eco-friendliness, biocompatibility, non-toxicity, hydrogen-bonding capacity, tunable crystallinity, high chemical resistance, tailored aspect ratios (100–150), low thermal expansion coefficient, reactive surface, low density (1.6 g/cm 3 ), high specific surface area (100–200 of m 2 /g), high tensile strength (7.5–7.7 GPa) and elastic modulus (130–150 GPa) [ 10 , 30 ]. This promising polysaccharide has received tremendous attention during the last two decades in a wide range of applications such as sensors and biosensors, energy storage systems, oil and gas drilling and cementing, papermaking, filtration, decontamination, adsorption, separation, wood adhesives, Pickering emulsifiers, medical and nanocomposites, to cite a few [ 13 , 14 , 16 , 20 , 35 , 36 , 42 , 74 , 75 , 76 ]. Depending on the isolation method, morphology and size, NC is principally categorized into: (i) cellulose nanostructured materials such as cellulose microfibrils and microcrystalline cellulose and (ii) cellulose nano-objects, also known as nanofibers, such as cellulose nanocrystals (CNC), cellulose nanofibrils (CNF) and bacterial nanocellulose (BC).…”

Section: Cellulose Nanocrystals (Cnc)mentioning

confidence: 99%

Cellulose Nanocrystals/Graphene Hybrids—A Promising New Class of Materials for Advanced Applications

2020

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With the growth of global fossil-based resource consumption and the environmental concern, there is an urgent need to develop sustainable and environmentally friendly materials, which exhibit promising properties and could maintain an acceptable level of performance to substitute the petroleum-based ones. As elite nanomaterials, cellulose nanocrystals (CNC) derived from natural renewable resources, exhibit excellent physicochemical properties, biodegradability and biocompatibility and have attracted tremendous interest nowadays. Their combination with other nanomaterials such as graphene-based materials (GNM) has been revealed to be useful and generated new hybrid materials with fascinating physicochemical characteristics and performances. In this context, the review presented herein describes the quickly growing field of a new emerging generation of CNC/GNM hybrids, with a focus on strategies for their preparation and most relevant achievements. These hybrids showed great promise in a wide range of applications such as separation, energy storage, electronic, optic, biomedical, catalysis and food packaging. Some basic concepts and general background on the preparation of CNC and GNM as well as their key features are provided ahead.

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Cottonseed protein-based wood adhesive reinforced with nanocellulose

Cited by 50 publications

References 48 publications

Nanocellulose: Recent Fundamental Advances and Emerging Biological and Biomimicking Applications

Nanocellulose: Recent Fundamental Advances and Emerging Biological and Biomimicking Applications

Chemical Modification of Nanocellulose in Wood Adhesive: Review

Cellulose Nanocrystals/Graphene Hybrids—A Promising New Class of Materials for Advanced Applications

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