Effects of octadecylamine functionalization of carbon nanotubes on dispersion, polarity, and mechanical properties of CNT/HDPE nanocomposites

Menezes, Beatriz Rossi Canuto de; Ferreira, Filipe V.; Silva, B. C.; Simonetti, E. A. N.; Bastos, Tarcis; Cividanes, Luciana De Simone; Thim, Gilmar Patrocínio

doi:10.1007/s10853-018-2627-3

Cited by 154 publications

(104 citation statements)

References 69 publications

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“…In recent years, synthetic materials have played a key role in various industrial sectors of technology such as aerospace, aeronautics, automotive, medical, sensors, computational, etc., [1][2][3][4][5][6]. Among these materials, polymers stand out because they have low density as well as good mechanical and thermal properties that make them widely applicable [7][8][9][10][11]. However, increased durability of these materials has raised strong concerns about the large accumulation of plastic waste in the environment [12].…”

Section: Introductionmentioning

confidence: 99%

Polymer Composites Reinforced with Natural Fibers and Nanocellulose in the Automotive Industry: A Short Review

Ferreira

Pinheiro

Souza³

et al. 2019

J. Compos. Sci.

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151

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Environmental concerns and cost reduction have encouraged the use of natural fillers as reinforcement in polymer composites. Currently, a wide variety of reinforcement, such as natural fibers and nanocellulose, are used for this purpose. Composite materials with natural fillers have not only met the environmental appeal, but also contribute to developing low-density materials with improved properties. The production of natural fillers is unlimited around the world, and many species are still to be discovered. Their processing is considered beneficial since the natural fillers do not cause corrosion or great wear of the equipment. For these reasons, polymer reinforced with natural fillers has been considered a good alternative for obtaining ecofriendly materials for several applications, including the automotive industry. This review explores the use of natural fillers (natural fibers, cellulose nanocrystals, and nanofibrillated cellulose) as reinforcement in polymer composites for the automotive industry.

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Section: Introductionmentioning

confidence: 99%

Polymer Composites Reinforced with Natural Fibers and Nanocellulose in the Automotive Industry: A Short Review

Ferreira

Pinheiro

Souza³

et al. 2019

J. Compos. Sci.

Self Cite

151

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“…Thus, overcoming these Van der Waals forces to achieve affinity and thus good interface between the matrix and the nanoparticle is crucial to obtaining improved mechanical properties. A large number of research studies have focused on various functionalization techniques to enhance the dispersion and improve affinity between the polymer matrix and the nanofiller [7][8][9]. Non-functionalized nanofillers have some drawbacks in that they may encourage the formation stable agglomerates or bundles in the polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Observations of a novel strengthening mechanism in HDPE nanocomposites

Okolo

2018

Nanocomposites

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Previous strengthening mechanisms described in literature for high density polyethylene (HDPE) carbon nanotubes composites are typical of those observed in fibre reinforced polymeric micro composites. Here, we present a new molecular level strengthening mechanism based on HDPE carbon nanotubes composite, which has not been reported before to the best of authors' knowledge. The HDPE nanocomposite was produced by melt intercalation technique via twin-screw extrusion. Thereafter, the samples were subjected to mechanical tensile tests and scanning electron microscope (SEM) examination. Carbon nanotubes (CNTs) were found to be disentangled from the polymer molecules after yielding and prior to breaking. SEM and optical microscopic observations revealed visible black agglomerate bands at 45 appeared after yielding and prior to the breaking of the ductile HDPE. It was observed that CNTs were pushed out from the intricate mechanical interlocking with the thermoplastic polymeric chains of HDPE during strain hardening. ARTICLE HISTORY

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“…Therefore, for HDPE/CNT-ODA, it is expected that CNT-ODA will merge with the HDPE matrix due to the ODA chains, reducing the activity as nucleating agents. Our previous work [17] proved this effect. The better dispersion and interaction of CNT-ODA with HDPE produced more homogeneous nanocomposites with higher mechanical properties.…”

Section: Isoconversional Analysis Of Dsc Crystallization Datamentioning

confidence: 60%

“…The multi-walled CNTs used as a nanofiller to prepare HDPE nanocomposites were provided by INPE-Brazil and prepared by the chemical vapor deposition method (CNT-P) [46]. The acid (CNT-COOH) and octadecylamine (CNT-ODA) functionalization were performed following previous procedures [17].…”

Section: Methodsmentioning

confidence: 99%

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Non-Isothermal Crystallization Kinetic of Polyethylene/Carbon Nanotubes Nanocomposites Using an Isoconversional Method

et al. 2019

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Behavior studies of thermoplastic polymers during non-isothermal crystallization are extremely important since most of their properties are influenced by degree of crystallinity and the crystallization process. In general, an approach based on a model-fitting method is used to perform crystallization kinetic studies. Due to their inability to uniquely determine the reaction mode, many studies have used the isoconversional method, where it is not necessary to assume a crystallization model to obtain the kinetic parameters. Therefore, in this work, the influence of acid and octadecylamine functionalized carbon nanotubes (CNTs) in the crystallization kinetic of polyethylene (PE) was studied using an isoconversional method with differential scanning calorimetry (DSC) and polarized optical microscopy (POM). The kinetic parameters and the crystallization model were determined. The incorporation of functionalized and non-functionalized CNTs into PE did not change the Johnson-Mehl-Avrami crystallization model. However, the CNTs increased the crystallization temperature and reduced the activation energy for crystallization. In addition, the Avrami coefficient values were lower for the nanocomposites when compared to pure PE. The incorporation of CNTs accelerated the crystallization of PE, reducing the crystallite sizes and modifying their morphology.

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Effects of octadecylamine functionalization of carbon nanotubes on dispersion, polarity, and mechanical properties of CNT/HDPE nanocomposites

Cited by 154 publications

References 69 publications

Polymer Composites Reinforced with Natural Fibers and Nanocellulose in the Automotive Industry: A Short Review

Polymer Composites Reinforced with Natural Fibers and Nanocellulose in the Automotive Industry: A Short Review

Observations of a novel strengthening mechanism in HDPE nanocomposites

Non-Isothermal Crystallization Kinetic of Polyethylene/Carbon Nanotubes Nanocomposites Using an Isoconversional Method

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