Grafting of polyethylenimine onto cellulose nanofibers for interfacial enhancement in their epoxy nanocomposites

Zhao, Jing; Li, Qingye; Zhang, Xiaofang; Xiao, Meijie; Zhang, Wei; Lu, Canhui

doi:10.1016/j.carbpol.2016.11.025

Cited by 49 publications

(35 citation statements)

References 39 publications

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“…Omrani et al studied the effect of CNF on the curing behavior and properties of epoxy/diamine systems and found that both the T g and reaction rate were increased with CNF addition. Similarly, an increase in epoxy reaction rate by CNF incorporation was observed by Ansari et al An interfacial enhancement in epoxy nanocomposites by introducing the polyethyleneimine‐modified CNF was reported by Zhao et al The tensile strength and Young's modulus were, respectively, increased by 88.1% and 237.6% compared with the neat epoxy. Also, for the carbon fabric/epoxy composites, the enhancement of mechanical properties by using cellulose nanofibrils was found by Phong et al However, to the best of our knowledge, the influence of CNF on the reaction‐induced phase separation behavior in the epoxy/TP blends has not been mentioned yet.…”

Section: Introductionsupporting

confidence: 55%

“…As potential reinforcement for polymers and composites, CNF has been increasingly concerned in recent years, because of their merits of wide source, renewability, and excellent mechanical property . The effect of CNF on curing reaction and mechanical properties of epoxy systems has been reported in the literature . Lu et al successfully dispersed the modified nanocelluose into an epoxy system and described that mechanical properties of epoxy composites were improved due to the good dispersion and strong adhesion between cellulose nanofibrils and matrix.…”

Section: Introductionmentioning

confidence: 99%

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Effect of cellulose nanofiber on the dynamically asymmetric phase separation in epoxy/polysulfone blends

Zhang

Ling

Zhao

et al. 2019

J Polym Sci B Polym Phys

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Significant effect of cellulose nanofibers (CNFs) on cure‐induced phase separation in dynamically asymmetric system is reported. An epoxy/polysulfone blends with typical layered structure formation was chosen as the polymer matrix, and morphology evolution and rheological behavior of systems with different nano‐size fiber loadings upon curing reaction were investigated using optical microscopy and rheological measurement. CNF distributed uniformly in the polymer matrix and had good interaction with polymer chains. Curing reaction of epoxy was promoted by CNF, making the system gel and phase separate earlier. Meanwhile, system viscosity was increased with CNF addition, and the movement of polymer chains and component diffusion were constrained, as a result, the structure evolution process was slowed down. The CNF altered the final morphologies, resulting in refined structures with smaller characteristic length scales or even completely change the morphologies from the layered structures to a bicontinuous structure when the CNF concentration reached to a relatively high level. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2019, 57, 1357–1366

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Section: Introductionsupporting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Effect of cellulose nanofiber on the dynamically asymmetric phase separation in epoxy/polysulfone blends

Zhang

Ling

Zhao

et al. 2019

J Polym Sci B Polym Phys

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“…Polymer‐based organic‐inorganic composites, which present remarkable improvement in material performances in comparison to conventional composites or virgin polymer systems, have attracted much interest . Conventional organic‐inorganic composites usually involve a high content (>10 wt%) of inorganic materials to obtain the desired properties.…”

Section: Introductionmentioning

confidence: 99%

“…Polymer-based organic-inorganic composites, which present remarkable improvement in material performances in comparison to conventional composites or virgin polymer systems, have attracted much interest. [1][2][3][4][5][6][7][8][9] Conventional organic-inorganic composites usually involve a high content (>10 wt%) of inorganic materials to obtain the desired properties. Such high content level results in the deterioration in properties, owing to the interfacial incompatibility between inorganic and organic materials, and increasing the density of the composites.…”

Section: Introductionmentioning

confidence: 99%

“…[16][17][18][19][20] However, the physic-mechanical performances of the nanocomposites composites have been greatly dependent on the degree of dispersion of nanomaterials in a polymer matrix. 11 Many methods have been explored for promoting the dispersion of nanomaterials, such as grafting of functional polymers, 9,21 ultrasonic treatment, shear mixing, and centrifugation. 22 Although the dispersion of nanocomposites in a polymer matrix has been improved and the properties, especially the thermomechanical properties, have been promoted, [23][24][25][26] the effects of nanocomposites on the properties of composites do not achieve the expectations.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Pickering emulsion on the mechanical performances and fracture toughness of epoxy composites

2019

Polymers for Advanced Techs

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The improvement of mechanical properties and toughness of nanoparticles for epoxy composites was mostly dependent on the disperse state of nanoparticles in epoxy matrices. When the content of nanoparticles was higher than a threshold value, it was easy to aggregate and then affect the improvement effect. Pickering emulsion was prepared using SiO2 nanoparticles as emulsifier and functional monomer as oil phase. The influence of Pickering emulsion on the curing process was investigated. The effect of Pickering emulsion on the mechanical properties, toughness, and glass transition temperature (Tg) was studied. Impact and tensile fracture surface were observed by scanning electron microscopy (SEM). Results from differential scanning calorimeter (DSC), tensile, impact, and fracture toughness tests are provided. The results indicated that the introduction of Pickering emulsion can eliminate the residual stress and accelerate curing reaction. Epoxy composites were capable of increasing tensile strength by up to 29.9%, impact strength of three‐fold, fracture toughness of 35%, and Tg of 20.7°C in comparison with the reference sample. SEM images showed that SiO2 nanoparticles exhibit a good dispersion in epoxy matrix. The increases in mechanical properties, toughness, and Tg of epoxy composites were attributed to the “Second Phase Toughness” mechanism.

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Thermal properties of nanocellulose‐reinforced composites: A review

Gan

Sam

Abdullah

et al. 2019

J of Applied Polymer Sci

202

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Nanocellulose has received increasing attention in science and industry in recent years as a nanoscale material for the reinforcement of polymer matrix composites due to its superior mechanical properties, renewability, and biodegradability. New nanocellulose sources, modifications, and treatments are under development to reduce the high energy required during production and to create a more suitable industrial-scale production process. Thus, this paper reviews plant-based nanocellulose composites and their properties, with a focus on their thermal-related characteristics. The purpose of this review is to establish for readers the impact of the incorporation of nanocellulose on the thermal and dynamic mechanical properties of nanocellulose composites. Understanding of the thermal properties is important for researchers to assess the suitability of the nanocomposites for a variety of applications in response to new and evolving societal requirements.The first NFC was produced from wood by using high-pressure homogenization without any pretreatment. 11,12 However, this method is a very energy-intensive process. Therefore, chemical treatments such as 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO) oxidation combined with mechanical and chemical

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Grafting of polyethylenimine onto cellulose nanofibers for interfacial enhancement in their epoxy nanocomposites

Cited by 49 publications

References 39 publications

Effect of cellulose nanofiber on the dynamically asymmetric phase separation in epoxy/polysulfone blends

Effect of cellulose nanofiber on the dynamically asymmetric phase separation in epoxy/polysulfone blends

Effect of Pickering emulsion on the mechanical performances and fracture toughness of epoxy composites

Thermal properties of nanocellulose‐reinforced composites: A review

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