Bio-based epoxy/chitin nanofiber composites cured with amine-type hardeners containing chitosan

Shibata, Mitsuhiro; Enjoji, Motohiro; Sakazume, Katsumi; Ifuku, Shinsuke

doi:10.1016/j.carbpol.2016.02.033

Cited by 25 publications

(11 citation statements)

References 32 publications

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“…No data on mechanical properties were presented. Later in 2016, Shibata et al 71 reinforced their waterborne epoxy resin with 3% ChNFs, but their nanocomposite performance (E = 2.4 GPa, σ = 50 MPa) was nowhere near the cellulose nanocomposites prepared by Yano. The authors claimed that their nanocomposite performance was actually reduced at higher loadings of chitin.…”

Section: Impregnated 40%mentioning

confidence: 99%

“…The polymer matrices reinforced with ChNFs in this figure include thermoplastics from soy protein, 242 polylactide 243,244 and plasticized polylactide, 245−247 polyurethane, 248 citrate-based bioelastomer, 249 maize starch, 250 potato starch, 251 thermoplastic starch, 252 polycaprolactone, 253 acrylic, 165,254 and biobased epoxy resins. 71 Significant variation in the tensile properties of chitin nanocomposites can be…”

Section: Biomacromoleculesmentioning

confidence: 99%

“…Figure summarizes the tensile properties of chitin nanocomposites reinforced with either ChNFs or ChNCs reported in the literature. The polymer matrices reinforced with ChNFs in this figure include thermoplastics from soy protein, polylactide , and plasticized polylactide, − polyurethane, citrate-based bioelastomer, maize starch, potato starch, thermoplastic starch, polycaprolactone, acrylic, , and biobased epoxy resins . Significant variation in the tensile properties of chitin nanocomposites can be observed, even for the same chitin loading fraction (Figure ).…”

Section: Applications Of Nanosized Chitinmentioning

confidence: 99%

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Nanomaterials Derived from Fungal Sources—Is It the New Hype?

et al. 2019

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Greener alternatives to synthetic polymers are constantly being investigated and sought after. Chitin is a natural polysaccharide that gives structural support to crustacean shells, insect exoskeletons, and fungal cell walls. Like cellulose, chitin resides in nanosized structural elements that can be isolated as nanofibers and nanocrystals by various top-down approaches, targeted at disintegrating the native construct. Chitin has, however, been largely overshadowed by cellulose when discussing the materials aspects of the nanosized components. This Perspective presents a thorough overview of chitin-related materials research with an analytical focus on nanocomposites and nanopapers. The red line running through the text emphasizes the use of fungal chitin that represents several advantages over the more popular crustacean sources, particularly in terms of nanofiber isolation from the native matrix. In addition, many β-glucans are preserved in chitin upon its isolation from the fungal matrix, enabling new horizons for various engineering solutions.

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Section: Impregnated 40%mentioning

confidence: 99%

Section: Biomacromoleculesmentioning

confidence: 99%

Section: Applications Of Nanosized Chitinmentioning

confidence: 99%

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Nanomaterials Derived from Fungal Sources—Is It the New Hype?

et al. 2019

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“…These include cellulose nanowhiskers, which are mainly prepared through acid hydrolysis and have an aspect ratio of 50–100; microfibrillated cellulose (MFC), which comes from mechanical fibrillation with and without pretreatment as a weblike structure; and individualized nanofiber cellulose (NFC) prepared by 2,2,6,6‐tetramethylpiperidine‐1‐oxyl (TEMPO)‐mediated oxidation. Because of its excellent mechanical strength, researchers have used nanoscale cellulose as a promising reinforcing agent in the combination of various polymer matrixes, including poly(lactic acid), polyurethane, epoxy resin, and poly(vinyl alcohol) …”

Section: Introductionmentioning

confidence: 99%

Combination of cellulose nanofibers and chain‐end‐functionalized polyethylene and their applications in nanocomposites

Dang

Cao

et al. 2017

J of Applied Polymer Sci

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In this study, nanofiber cellulose (NFC) based on a 2,2,6,6-tetramethylpiperidine-1-oxyl radical oxidization method was successfully combined with chain-end-functionalized polyethylene containing alkoxysilane via silanization. Fourier transform infrared spectroscopy, transmission electron microscopy, contact angle measurements, Molau tests, and X-ray photoelectron spectroscopy analyses provided further evidence for the effectiveness of the surface modifications. The hydrophilic surface characteristics of NFC were changed to apparently hydrophobic for the modified nanofiber cellulose (M-NFC). Then, the linear low-density polyethylene (LLDPE)/M-NFC nanocomposite was prepared, and the mechanical properties, thermal properties, and crystallization properties of the LLDPE-M-NFC were investigated by tensile testing, thermogravimetric analysis, differential scanning calorimetry, and dynamic mechanical analysis. The results show that after modification, the thermal stability of NFC was enhanced. The interface between M-NFC and the matrix was good. The tensile strength and Young's modulus values of the nanocomposites were enhanced compared with those of LLDPE; in particular, the tensile strength and Young's modulus of the blend with 5 wt % M-NFC increased by 56 and 106%, respectively. The storage modulus of the nanocomposites was enhanced obviously over a wide temperature range. The addition of a small amount of M-NFC had slight effects on the crystallinity and melting temperature of LLDPE. V C 2017 Wiley Periodicals, Inc. J.Appl. Polym. Sci. 2017, 134, 45387.

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“…To date, most self‐healing epoxy coatings are based on microcapsules or microvascular network . Fortunately, the structure and property of epoxy systems can be tailored easily through choosing different curing agents, offering the opportunity to achieve the self‐healing from a certain structure design of epoxy network . It has been reported that the T g and crosslinking density of epoxy network can be switched by varying the ratio of diamine as curing agent and monoamine as chain extender .…”

Section: Introductionmentioning

confidence: 99%

Self‐Healing Epoxy Coatings via Focused Sunlight Based on Photothermal Effect

Fang

Chen

Zou

et al. 2017

Macro Materials & Eng

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Epoxy coatings which can be healed via photothermal effect from focused sunlight are reported. The diamine of m‐xylylenediamine (MXDA) and monoamine of 4‐(heptadecafluorooctyl)aniline (HFOA) are reacted into the diglycidylether of bisphenol A (DGEBA) network. Via gradual replacement of MXDA with HFOA, the glass transition temperature and crosslinking density of the epoxy network are tuned to achieve the thermally induced healing based on chain diffusion and reentanglement. Aniline black (AB) with well absorptivity for sunlight is used subsequently as the organic photothermal compound, transferring the thermally induced healing into a sunlight responsive one. A common handheld magnifier, which can focus natural sunlight to the required power density (0.6–0.9 W cm−1), is used to successfully heal one cracked coating in outdoor circumstance. This study provides a potential approach to achieve the convenient, precise, and timely healing for outdoor epoxy coatings.

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Bio-based epoxy/chitin nanofiber composites cured with amine-type hardeners containing chitosan

Cited by 25 publications

References 32 publications

Nanomaterials Derived from Fungal Sources—Is It the New Hype?

Nanomaterials Derived from Fungal Sources—Is It the New Hype?

Combination of cellulose nanofibers and chain‐end‐functionalized polyethylene and their applications in nanocomposites

Self‐Healing Epoxy Coatings via Focused Sunlight Based on Photothermal Effect

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