Water transport kinetics and thickness swelling behavior of natural fiber-reinforced HDPE/CNT nanocomposites

Kord, Behzad; Roohani, Mehdi

doi:10.1016/j.compositesb.2017.06.008

Cited by 22 publications

(15 citation statements)

References 29 publications

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“…Upon reinforcement with CNTs, this polymer might potentially be used in other applications like automobiles, aerospace, ships, sport equipment, and textiles 15 . There are several reports on the production of HDPE/CNT nanocomposites 16–21 . Some of these nanocomposites were investigated for their mechanical properties 17,19–21 .…”

Section: Introductionmentioning

confidence: 99%

Effective reinforcements for thermoplastics based on carbon nanotubes of oil fly ash

Salah

Alfawzan

Saeed

et al. 2019

Sci Rep

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Carbon nanotubes (CNTs) are widely investigated for preparing polymer nanocomposites, owing to their unique mechanical properties. However, dispersing CNTs uniformly in a polymer matrix and controlling their entanglement/agglomeration are still big technical challenges to be overcome. The costs of their raw materials and production are also still high. In this work, we propose the use of CNTs grown on oil fly ash to solve these issues. The CNTs of oil fly ash were evaluated as reinforcing materials for some common thermoplastics. High-density polyethylene (HDPE) was mainly reinforced with various weight fractions of CNTs. Xylene was used as a solvent to dissolve HDPE and to uniformly disperse the CNTs. Significantly enhanced mechanical properties of HDPE reinforced at a low weight fraction of these CNTs (1–2 wt.%), mainly the tensile strength, Young’s modulus, stiffness, and hardness, were observed. The tensile strength and Young’s modulus were enhanced by ~20 and 38%, respectively. Moreover, the nanoindentation results were found to be in support to these findings. Polycarbonate, polypropylene, and polystyrene were also preliminarily evaluated after reinforcement with 1 wt.% CNTs. The tensile strength and Young’s Modulus were increased after reinforcement with CNTs. These results demonstrate that the CNTs of the solid waste, oil fly ash, might serve as an appropriate reinforcing material for different thermoplastics polymers.

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Section: Introductionmentioning

confidence: 99%

Effective reinforcements for thermoplastics based on carbon nanotubes of oil fly ash

Salah

Alfawzan

Saeed

et al. 2019

Sci Rep

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“…This result can be explained by the fact that the diffusion of alive microorganisms in aqueous solution is the principal mechanism of degradation in activated sludge. This decrement is due to the barrier properties of MWCNT which block off the entry of water and microorganisms to some extent . Two mechanisms have been reported for this phenomenon.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of viscoelastic, thermal, morphological, and biodegradation properties of polypropylene nano‐biocomposites using natural fiber and multi‐walled carbon nanotubes

Yaghoobi

Fereidoon

2018

Polymer Composites

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This article investigates the performances of polypropylene/kenaf fiber/polypropylene‐grafted maleic anhydride/multiwall carbon nanotube (PP/kenaf/PP‐g‐MA/MWCNT) nano‐biocomposites in terms of viscoelastic, thermal, and biodegradability properties. Nano‐biocomposites with kenaf weight content of 30 wt%, fiber length of 6 mm and different contents of MWCNTs (0.5–2 wt%) were produced for testing and characterization. The samples were made by melt compounding in Brabender internal mixer and then hot and cold pressing. The dynamic mechanical thermal analysis results showed that the incorporation of MWCNT enhanced the storage and loss moduli of the PP/kenaf/PP‐g‐MA biocomposites. Differential scanning calorimetry results depicted an increase in the melting and crystallization temperatures of PP/kenaf/PP‐g‐MA biocomposites with the increase of MWCNT contents. The biodegradation of biocomposites was investigated in the activated sludge on a laboratory scale for 10 months in order to study the rates of biodegradation of the samples. The biodegradability test conducted on each specimen illustrated that the produced biocomposites are subjected to partial biodegradation, judging by the change in mechanical properties and weight of them after the test. Morphological study which characterized using scanning electron microscopy technique verified that a good and homogeneous distribution of MWCNT through the biocomposites; however; some aggregates were revealed at higher MWCNTs content. POLYM. COMPOS., POLYM. COMPOS., 39:E592–E600, 2018. © 2018 Society of Plastics Engineers

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“…This reduction is attributed to the barrier properties of CNTs, which hinder the water diffusion into the composite structure. CNTs can inhibit the moisture penetration into the composite through two main mechanisms: (i) CNTs hinder the diffusion of water into deeper regions of the composite through filling the air gaps and voids; (ii) the surface of CNTs tends to immobilize the amount of the moisture due to its hydrophobic nature [290,291]. The effect of natural nanofillers such as cellulose and clay reinforcements on the moisture absorption behavior of natural composites is further investigated through Sections 7.1 and 7.2, respectively.…”

Section: Incorporation Of Nanofillersmentioning

confidence: 99%

Critical Review of the Parameters Affecting the Effectiveness of Moisture Absorption Treatments Used for Natural Composites

Al-Maharma

Al-Huniti

2019

J. Compos. Sci.

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Natural composites can be fabricated through reinforcing either synthetic or bio-based polymers with hydrophilic natural fibers. Ultimate moisture absorption resistance at the fiber–matrix interface can be achieved when hydrophilic natural fibers are used to reinforce biopolymers due to the high degree of compatibility between them. However, the cost of biopolymers is several times higher than that of their synthetic counterparts, which hinders their dissemination in various industries. In order to produce economically feasible natural composites, synthetic resins are frequently reinforced with hydrophilic fibers, which increases the incompatibility issues such as the creation of voids and delamination at fiber–matrix interfaces. Therefore, applying chemical and/or physical treatments to eliminate the aforementioned drawbacks is of primary importance. However, it is demonstrated through this review study that these treatments do not guarantee a sufficient improvement of the moisture absorption properties of natural composites, and the moisture treatments should be applied under the consideration of the following parameters: (i) type of hosting matrix; (ii) type of natural fiber; (iii) loading of natural fiber; (iv) the hybridization of natural fibers with mineral/synthetic counterparts; (v) implantation of nanofillers. Complete discussion about each of these parameters is developed through this study.

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Water transport kinetics and thickness swelling behavior of natural fiber-reinforced HDPE/CNT nanocomposites

Cited by 22 publications

References 29 publications

Effective reinforcements for thermoplastics based on carbon nanotubes of oil fly ash

Effective reinforcements for thermoplastics based on carbon nanotubes of oil fly ash

Evaluation of viscoelastic, thermal, morphological, and biodegradation properties of polypropylene nano‐biocomposites using natural fiber and multi‐walled carbon nanotubes

Critical Review of the Parameters Affecting the Effectiveness of Moisture Absorption Treatments Used for Natural Composites

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