Influence of intercalation methods in properties of Clay and carbon nanotube and high density polyethylene nanocomposites

Silva, Bruna Louise; Nack, Fernanda Czerkies; Lepienski, C.M.; Coelho, Luci Boa Nova; Becker, Daniela

doi:10.1590/1516-1439.303714

Cited by 20 publications

(9 citation statements)

References 34 publications

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“…The elongation at break of PEEK nanocomposites decreases significantly with increasing the concentration of the nanofillers. Similar observations were reported for high-density polyethylene, thermoplastic polyurethane, and polypropylene (PP)/CNTs/MMT [28,41,42]. In brief summary, the incorporation of MMT as a second filler has a reinforcement effect on PEEK through improving the dispersion of CNTs in the matrix, while MMT itself has a negative effect on the mechanical properties of PEEK since the diffusion of PEEK into the MMT gallery is unsuccessful.…”

Section: Resultssupporting

confidence: 72%

Melt-Processed Poly(Ether Ether Ketone)/Carbon Nanotubes/Montmorillonite Nanocomposites with Enhanced Mechanical and Thermomechanical Properties

Zhu

Zeng

et al. 2019

Materials

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The agglomeration problem of nanofillers, for instance, carbon nanotubes (CNTs) in a poly(ether ether ketone) (PEEK) matrix, is still a challenging assignment due to the intrinsic inert nature of PEEK to organic solvents. In this work, organically modified montmorillonite (MMT) was introduced as a second filler for improving the dispersion of CNTs in the PEEK matrix and enhancing the mechanical properties, as well as reducing the cost of the materials. The nanocomposites were fabricated through melt-mixing PEEK with CNTs/MMT hybrids, which were prepared in advance by mixing CNTs with MMT in water. The introduction of MMT improved the dispersion stability of CNTs, as characterized by sedimentation and zeta potential. The CNTs/MMT hybrids were maintained in PEEK nanocomposites as demonstrated by the transmission electron microscope. The mechanical and thermomechanical measurements revealed that CNTs together with MMT had a strong reinforcement effect on the PEEK matrix, especially at high temperature, although it had a negative effect on the toughness. A maximum increase of 48.1% was achieved in storage modulus of PEEK nanocomposites with 0.5 wt% CNTs and 2 wt% MMT at 240 °C, compared to that of neat PEEK. The differential scanning calorimetry results revealed that CNTs accelerated the crystallization of the PEEK matrix while a further addition of MMT played an opposite role. The nucleation activity of the fillers was also evaluated by the Dobreva method.

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Section: Resultssupporting

confidence: 72%

Melt-Processed Poly(Ether Ether Ketone)/Carbon Nanotubes/Montmorillonite Nanocomposites with Enhanced Mechanical and Thermomechanical Properties

Zhu

Zeng

et al. 2019

Materials

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“…In addition, from the best of our knowledgement, there are a few works that had prepared nanocomposites using solution mixing techniques [6][7][8][9][10] with HDPE as a matrix, very probably due to time consumption of the method and the fact that organic solvents in general are employed. In our previous work [11], we observed significant differences in the nanocomposites morphology and consequently in mechanical and thermal properties using different mixing techniques.…”

Section: Introductionmentioning

confidence: 87%

Influence of mixing methods on the properties of high density polyethylene nanocomposites with different carbon nanoparticles

et al. 2017

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In this paper, nanocomposites with multiwalled carbon nanotubes (MWCNT) or graphene nanosheets were prepared using a high density polyethylene (HDPE) matrix. Two different processes were employed: a solution method and a melt mixing method. The crystallinity index of the HDPE showed similar levels in nanocomposites after the addition of carbon nanotubes. It can be seen that the preparation process modified the degree of crystallinity of the HDPE matrix with graphene nanosheets. Nanocomposites prepared by the solution method showed a decrease in the crystallinity index. The addition of carbon nanotubes led to an increase of Young´s Modulus with an increase in the MWCNT quantity, regardless of the preparation process used, with a 22.8 % increase for composites with 0.5 wt% of CNTs. The nanocomposites with graphene nanosheets exhibited a different behavior with each mixing method. Nanocomposites prepared by the solution method showed a higher Young´s Modulus than those prepared by melt mixing. Results of transmission electronic microscopy and field emission scanning electronic microscopy indicated homogeneous dispersion for carbon nanotubes in melt mixing. Graphene nanocomposites showed some agglomerates, with smaller platelets in the nanocomposites prepared by solution mixing compared to that prepared by the melt mixing.

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“…The change of surface morphology of PE samples in our work is similar to the results published by other authors in some paper. [4,8,10] [14] There are some peaks of additives were also appeared in XRD patterns of PE pipes before testing. After immersing in seawater for 10 months, the position of characteristic peaks of (110) and (200) reflexions was fixed but their intensity was increased.…”

Section: Morphology Of Pe Pipes Before and After Testingmentioning

confidence: 97%

Change of some characteristics of HDPE pipes tested in Nghe An province seawater

Chinh

Hiep

Thang

et al. 2020

Vietnam Journal of Chemistry

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This paper focuses to study on change of some characteristics of high density polyethylene (HDPE) pipes testing in Nghe An province seawater. The investigated characteristics of HDPE pipe before and after testing are structural, morphological, crystal, thermal property and stability. Infrared (IR) spectroscopy, scanning electron microscope (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and differential thermal analysis (DTA) methods were used to evaluate the change in characteristics of PE pipes after 10 testing months in Nghe An province seawater. In addition, the change in weight and tensile properties of PE pipes after testing was also investigated. The obtained results showed that the Nghe An province seawater had an influence on the structural, morphological, tensile, crystal and thermal characteristics of PE pipes.

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Influence of intercalation methods in properties of Clay and carbon nanotube and high density polyethylene nanocomposites

Cited by 20 publications

References 34 publications

Melt-Processed Poly(Ether Ether Ketone)/Carbon Nanotubes/Montmorillonite Nanocomposites with Enhanced Mechanical and Thermomechanical Properties

Melt-Processed Poly(Ether Ether Ketone)/Carbon Nanotubes/Montmorillonite Nanocomposites with Enhanced Mechanical and Thermomechanical Properties

Influence of mixing methods on the properties of high density polyethylene nanocomposites with different carbon nanoparticles

Change of some characteristics of HDPE pipes tested in Nghe An province seawater

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