High wet-strength, thermally stable and transparent TEMPO-oxidized cellulose nanofibril film via cross-linking with poly-amide epichlorohydrin resin

Yang, Weisheng; Bian, Huiyang; Ji, Liang; Wu, Weibing; Deng, Yulin

doi:10.1039/c7ra05009g

Cited by 78 publications

(49 citation statements)

References 34 publications

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“…The enhanced mechanical properties of cross‐linked NC‐based materials showed the potential to be used in medical, food, and drug packaging . In addition, the better wet mechanical performance improves the applications of NC‐based materials under high‐humidity conditions …”

Section: Covalently Linked Nanocellulose Materialsmentioning

confidence: 99%

“…Several studies have utilized the ability to manipulate carboxylic acid and amino functionalities to form NC‐based materials linked through amide linkages . Such linkages in NCs can be formed between the carboxyl groups of TOCNFs and the free amino groups of polymer matrices such as chitosan, alginate, or PAE . The formation of amide linkages between NCs and the polymer matrix can also be detected by FTIR and 13 C solid‐state NMR spectroscopies.…”

Section: Covalently Linked Nanocellulose Materialsmentioning

confidence: 99%

“…[26,28] In addition, the better wet mechanicalp erformance improves the applicationso fN C-based materials under high-humidity conditions. [27] In addition to the enhancement in mechanical properties, the maximum thermald egradation temperature had the tendency to shift to higher temperatures (maximumt hermal degradationt emperature was 252 8Cf or TOCNFsa nd 276 8Cf or cross-linked PAE-TOCNFs), [27] which indicated ab etter thermal stabilityo fc ross-linked NC-based materials. The formation of cross-linkages limits the mobility of the polymer chains resulting in improved thermal stability.…”

Section: Ester Linkagesmentioning

confidence: 99%

“…[24] Moreover, the cross-linked NC-basedm aterials also exhibited higher hydrophobicity.Y ang et al found that the moisture uptake ability was decreased from 189 %t o1 7% for cross-linked PAE-TOCNFs films and TOCNFs films, respectively,w hich is attributed to the fact that the cross-linking structure effectively limited water absorption among the fibrils and protected the interfibrillar hydrogen bonding. [27] Therefore, the cross-linkedN Cbased materials with increased hydrophobicity have shown the ability to be used under aqueous or high humid environments. [24] and [20] with permission.…”

Section: Ester Linkagesmentioning

confidence: 99%

“…[25] The enhanced tensile properties of wet films were also reported by Yang et al The wet polyamide epichlorohydrin resin/TEMPO-oxidized CNFs (PAE-TOCNFs) films with 0.9 wt %P AE had 95 MPa in tensile strength, 6.3 GPa in Young's modulus,a nd 2.4 %s train at breakage with 2.6-, 0.7-, and 0.8-fold improvements, respectively,c ompared to PAE-TOCNFs films with 0.1wt% PAE. [27] The enhanced mechanical properties of cross-linked NC-based materialss howed the potential to be used in medical, food, and drug packaging. [26,28] In addition, the better wet mechanicalp erformance improves the applicationso fN C-based materials under high-humidity conditions.…”

Section: Ester Linkagesmentioning

confidence: 99%

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Cross‐Linked Nanocellulosic Materials and Their Applications

Liang

Bhagia

et al. 2019

ChemSusChem

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Nanocelluloses (NCs) have remarkable mechanical properties and contain abundant surface functional groups that can be modified or cross‐linked with other materials. They have been widely used as an environment‐friendly reinforcing agent in polymer composites. However, for applications that are carried out in humid environments or aqueous suspensions, hydrophilicity of NCs lower their mechanical integrity. Hence, cross‐linking techniques have been investigated in recent years for preparing NC‐based materials that are dimensionally stable under humid or aqueous environments and have better physicochemical properties. This Minireview examines the quickly growing field of cross‐linked NC‐based materials, which have many benefits including improved aqueous, structural, mechanical, and thermal stability. In addition, the potential application of cross‐linked NC‐based materials in adsorption of heavy metal is discussed.

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Section: Covalently Linked Nanocellulose Materialsmentioning

confidence: 99%

Section: Covalently Linked Nanocellulose Materialsmentioning

confidence: 99%

Section: Ester Linkagesmentioning

confidence: 99%

Section: Ester Linkagesmentioning

confidence: 99%

Section: Ester Linkagesmentioning

confidence: 99%

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Cross‐Linked Nanocellulosic Materials and Their Applications

Liang

Bhagia

et al. 2019

ChemSusChem

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Lignin Nanoparticles as an Interfacial Modulator in Tough and Multi‐Resistant Cellulose–Polycaprolactone Nanocomposites Based on a Pickering Emulsions Strategy

Kimiaei

Farooq

Grande

et al. 2022

Adv Materials Inter

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frontier of materials science, designing biobased solutions that compete with conventional fossil-based plastics is crucial. Cellulose nanofibrils (CNFs) are prominent contenders for high-performance applications due to their nanoscale dimensions, [1] large surface area, [2] and exceptional mechanical characteristics. [3] The strength of CNF-based materials is a consequence of extensive hydrogen bonding between fibrils arising from the presence of surface hydroxyl groups. However, these hydroxyl groups efficiently bind water molecules, increasing moisture sensitivity and reducing wet strength. [4] In addition, the hydrophilic nature of CNFs hinders their combination with hydrophobic polymers, which is an obstacle to developing CNF-reinforced polymer nanocomposites with high modulus and ductility due to the poor compatibility between CNF and polymer matrix. [5] Several strategies, such as esterification, [6] silylation, [7] acetylation, [8] urethanization, [9] amidation, [10] and polymer grafting, [11] are frequently employed for the surface modification of CNFs to enhance the hydrophobicity. In recent studies, engineering the interface of CNF and hydrophobic polymers by reactive compatibilizers such as amphiphilic block and random copolymers is shown as a versatile tool to improve the miscibility of CNF with polymer matrices in melt processing. [12,13] However, hydrophobization strategies mostly target the surface hydroxyl groups, which curtail the hydrogen bonding pattern within the CNF network and lead to mechanically weaker material with poorer oxygen barrier properties than pure CNF nanopapers. [14] Furthermore, these chemical modifications increase the environmental impact of the material production process and hamper CNF's natural biodegradability, [15] a motivating factor for using CNF. Furthermore, to uplift the CNF status as an ultimate material platform for biomaterial design, the critical challenges associated with water interaction and its dispersion in hydrophobic media need to be addressed in a sustainable and scalable manner. To address these perplexing challenges, we suggest a natureinspired solution exploiting the inherent properties of CNF and another natural polymer, lignin. The conversion of crude Free-standing nanocellulosic films (nanopapers) emerge as attractive sustainable materials to replace traditional plastics. However, the moisture sensitivity of cellulose and its poor dispersion in hydrophobic polymers are challenges to its widespread application. Harnessing the inherent properties of cellulose, lignin, and polycaprolactone, a Pickering emulsion approach is proposed to produce multifunctional cellulose nanofibril (CNF) nanocomposite films. Aqueous CNF dispersion is combined with hydrophobic polycaprolactone (PCL) using colloidal lignin nanoparticles (CLPs) as the emulsion stabilizer. CNF-PCL nanocomposite films with over 134% increase in dry strength compared to nanocomposites without CLPs are fabricated. This interfacial engineering strategy results in a CNF-based nanocomposite with...

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Nanocellulose‐Enabled Membranes for Water Purification: Perspectives

Sharma

Lindström

et al. 2020

Advanced Sustainable Systems

141

106

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Membrane technology remains the most energy‐efficient process for removing contaminants (micrometer‐size particles to angstrom‐size hydrated ions) from water. However, the current membrane technology, involving relatively expensive synthetic materials, is often nonsustainable for the poorest communities in the society. In this article, perspectives are provided on the emerging nanocellulose‐enabled membrane technology based on nanoscale cellulose fibers that can be extracted from almost any biomass. It is conceivable that nanocellulose membranes developed from inexpensive, abundant, and sustainable resources (such as agriculture residues and underutilized biomass waste) can lower the cost of membrane separation, as these membranes offer the ability to remove a range of pollutants in one step, via size exclusion and/or adsorption. The nanocellulose‐enabled membrane technology not only may be suitable for tackling global drinking water challenges, but it can also provide a new low‐cost platform for various pressure‐driven filtration techniques, such as microfiltration, ultrafiltration, nanofiltration, and reverse osmosis. Some relevant parameters that can control the filtration performance of nanocellulose‐enabled membranes are comprehensively discussed. A short review of the current state of development for nanocellulose membranes is also provided.

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High wet-strength, thermally stable and transparent TEMPO-oxidized cellulose nanofibril film via cross-linking with poly-amide epichlorohydrin resin

Abstract: TEMPO-oxidized cellulose nanofibrils (TOCNs) films cross-linked with different dosages of polyamide epichlorohydrin resin (PAE) show a great water-resistance and thermal stability.

Cited by 78 publications

References 34 publications

Cross‐Linked Nanocellulosic Materials and Their Applications

Cross‐Linked Nanocellulosic Materials and Their Applications

Lignin Nanoparticles as an Interfacial Modulator in Tough and Multi‐Resistant Cellulose–Polycaprolactone Nanocomposites Based on a Pickering Emulsions Strategy

Nanocellulose‐Enabled Membranes for Water Purification: Perspectives

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