Old newsprint/polypropylene nanocomposites using carbon nanotube: Preparation and characterization

Asgary, Ali; Nourbakhsh, Amir; Kohantorabi, Mostafa

doi:10.1016/j.compositesb.2012.07.009

Cited by 22 publications

(27 citation statements)

References 13 publications

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“…Reduction of impact strength with increasing MWCNT can be related to the increase of the probability for MWCNT agglomeration that creates regions of stress concentrations that require less energy to elongate the crack propagation . This is consistent with the results reported by most authors . In general, the result of impact test showed that WPCs, which contain 2.5 wt% MWCNT have the highest impact strength value.…”

Section: Resultssupporting

confidence: 90%

“…Nanotubes can take two forms: single‐walled and multi‐walled. Single‐walled nanotubes (SWCNTs) consist of one layer of carbon atoms through the thickness of the cylindrical wall . Multi‐walled CNTs (MWCNTs), which were the first to be discovered, consist of concentric cylinders around a common central hollow with a constant separation between the layers close to the graphite inter‐layer spacing (0.34 nm).…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of multiwalled carbon nanotubes as reinforcement for natural fiber‐based composites

2015

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This paper presents the effects of multi‐walled carbon nanotube (MWCNT) as reinforcing agent on some properties of natural fiber/polypropylene composites. In the sample preparation, MWCNT contents and fiber types (bagasse stalk and poplar) were used as variable parameters. The composites with different MWCNT contents were fabricated by melt compounding in a twin‐screw extruder and then by injection molding. The mass ratio of the wood flour to polymer was 40/60 (w/w). The mechanical properties of composites in terms of tensile, flexural, and Izod impact strength were evaluated. The morphology of the specimens was characterized using scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques. Based on the findings of this study, it appears that mechanical properties reached the maximum when 2.5 wt% MWCNT were used. However, addition of 3.5 wt% MWCNT could not enhance the mechanical properties considerably. TEM micrographs showed that at high level of MWCNT loading (3.5 wt%) increased population of MWCNT leads to agglomeration and stress transfer gets blocked. The mechanical properties of composites filled with poplar fibers were generally greater than bagasse stalk composites. POLYM. COMPOS., 37:3269–3274, 2016. © 2015 Society of Plastics Engineers

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Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Evaluation of multiwalled carbon nanotubes as reinforcement for natural fiber‐based composites

2015

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“…Moreover, addition of OCC fibers has increased the flexural properties of the composite since high modulus and strong cellulose fibers have enhanced stiffness of the samples. The improvement in flexural properties due to the presence of cellulose fibers have been reported by Asgari et al [9].…”

Section: Flexural Propertiesmentioning

confidence: 56%

“…On the other hand, reduction in impact strength, as a result of increasing the amount of cellulose fibers may also arise due to thermal degradation of fibers and high shear forces in two‐screw extruder . Researchers who have measured the impact properties of WFPCs have reported similar trends .…”

Section: Resultsmentioning

confidence: 94%

“…Converting and recycling these materials for paper production require de‐inking, separation, and defibrating processes which make the manufacturing costs unfavorable. Therefore, it can be considered as an advantage to use old corrugated containers (OCCs) in order to produce WFPCs with no significant cost and they should be regarded as a good substitute for virgin fibers . However, these fibers are incompatible with polymeric phases since thermoplastics such as polypropylene and polyethylene are naturally non‐polar and incompatible with polar materials including lignocellulosic materials .…”

Section: Introductionmentioning

confidence: 99%

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A new amino silane coupling agent for old corrugated container fibers/high density polyethylene composites

et al. 2016

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The effects of a silane coupling agent such as (N‐(n‐butyl)−3‐aminopropyltrimethoxy silane) on old corrugated container (OCC) fibers, as a recyclable material, were studied on the ultimate strength of the prepared OCC fibers/high density polyethylene composites. Raw materials were mixed in a counter‐rotating twin‐screw extruder and injection molding machine was used to make samples. Various characterization methods, based on ASTM standard, were conducted to evaluate physical properties (water absorption and thickness swelling) and mechanical behavior (tensile, flexural, impact, hardness, and elongation‐at‐break) of the composites. Also, the thermal properties of the specimens were recorded by differential scanning calorimeter (DSC) and thermogravimetric analysis (TGA). Finally the results of the treated samples were compared with the non‐treated and pure polymer specimens. The obtained results showed that increasing coupling agents by a maximum of 2 wt% enhanced mechanical behavior (including flexural and tensile strengths), thermal stability, and increased crystallinity of the composites. Moreover, water absorption and thickness swelling of composite materials declined. Morphological studies by scanning electron microscopy methods (SEM) indicated that fiber pull‐out decreased in treated samples and coupling agent facilitated strong adhesion in fiber/polymer interface. The highest flexural strength and modulus were obtained in composites with 2 wt% silane coupling agent and 30 wt% OCC fibers. POLYM. COMPOS., 39:2054–2064, 2018. © 2016 Society of Plastics Engineers

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Determining the role of the method used to recycle polypropylene waste materials from automotive industry using sepiolite and zeolite fillers

Belviso

Montano

Lettino

et al. 2021

J Mater Cycles Waste Manag

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Old newsprint/polypropylene nanocomposites using carbon nanotube: Preparation and characterization

Cited by 22 publications

References 13 publications

Evaluation of multiwalled carbon nanotubes as reinforcement for natural fiber‐based composites

Evaluation of multiwalled carbon nanotubes as reinforcement for natural fiber‐based composites

A new amino silane coupling agent for old corrugated container fibers/high density polyethylene composites

Determining the role of the method used to recycle polypropylene waste materials from automotive industry using sepiolite and zeolite fillers

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