The influence of steam explosion treatment of green coffee cake on the thermal and mechanical properties of reinforced polypropylene matrix composites

Brito, Elisa Barbosa de; Tienne, Lucas Galhardo Pimenta; Cordeiro, Suellem Barbosa; Marques, Maria de Fátima Vieira; Monteiro, Sérgio Neves

doi:10.1016/j.jmrt.2020.02.032

Cited by 21 publications

(13 citation statements)

References 36 publications

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“…It is also related with the interface bond between the fibers and the matrix, effective stress transfer between the constituents, and restriction in polymer chain mobility [48][49][50] . Similar results are also found in previous studies using different natural fibers [46][47][48][49]51 . Brito et al 47 found that the green coffee cake reinforced PP composites showed higher stiffness than that of the PP matrix.…”

Section: Dynamic Mechanical Analysis Resultssupporting

confidence: 91%

“…45 It is seen in Figure 10(a) that the elastic modulus of the samples decreases with the increase in temperature, which is due to the softening of the PP matrix and increase in the mobility of the polymer chains. 46,47 The modulus of the composites also increases with the increase in the fiber concentration, which is much more evident after 60°C. It is noteworthy that the modulus of the composite with 30 wt.% PTF concentration is significantly higher than the others.…”

Section: Dynamic Mechanical Analysis Resultsmentioning

confidence: 95%

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A novel natural fiber from plane tree (Platanus orientalis L.) fruits to reinforce polypropylene composites

Savaş

2022

Journal of Composite Materials

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This study investigated the mechanical properties of polypropylene composites reinforced with short natural fibers obtained from plane tree ( Platanus orientalis L.) fruits. The fibers were harvested from the fruits that naturally fell from the tree in their standard length of about 6 mm. Composites were produced via melt blending using varied concentrations of the fibers (5–10–20–30 wt.%) and maleic anhydride grafted polypropylene (MAPP) copolymer as the coupling agent. The mechanical properties of the composites were characterized by tensile test, flexural test, dynamic mechanic analysis and ball-on-disc sliding wear test. The findings revealed that the fibers had a significant effect on the mechanical properties of the polypropylene matrix and the properties were found to improve linearly with increasing fiber concentration. At a 30 wt.% fiber concentration, the tensile and flexural strengths increased about 28% and 36% compared to pure polypropylene, respectively. At this fiber concentration, the modulus doubled compared to the pristine polymer. This increase is higher than that reported for most other natural fibers. Good miscibility between fibers and matrix, enhanced thermal stability, and about 30% reduction in friction coefficients were found. As a result, PTFs have the potential to be used in industries such as automotive, construction and sports which require mechanical strength and low weight.

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Section: Dynamic Mechanical Analysis Resultssupporting

confidence: 91%

Section: Dynamic Mechanical Analysis Resultsmentioning

confidence: 95%

A novel natural fiber from plane tree (Platanus orientalis L.) fruits to reinforce polypropylene composites

Savaş

2022

Journal of Composite Materials

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“…1.1.5 Transmissivity: Despite the fact that polypropylene could be made visible, this is frequently constructed to be inherently obscure. In applications where light transfer is crucial or aesthetic value is sought, polypropylene can be used [12]. If high transmissivity is needed, plastics such as Acrylic or Polycarbonate are ideal.…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Summary on the Enhancement of Characteristics of Reinforced Concrete by Employing Polypropylene Materials

Anto

2022

Preprint

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The scientific community is currently confronted with critical problems in providing a healthy world for future generations. The study for sustainable plastic recycling methods is difficult for a variety of purposes. Indeed, during the previous century, the widespread usage of plastic materials has resulted in vast amounts of long-lasting waste that has remained largely unaddressed by effective collection and disposal policies. Packaging materials are responsible for the majority of this waste which also includes polypropylene materials. However, environmental concerns imposed a new trend in the previous decade that brought this topic under the microscope, as seen by the growing number of linked publications. For the recycling of polymeric plastic materials, several chemical and mechanical methodologies have been proposed. Due to the low ultimate tensile strain of concrete, plastic waste fibre materials have been used in concrete in recent times as the reinforced concrete components often function with cracks during the serviceability phase. The bonding strength and stress variation during flexure are investigated, and also the toughening effect of a hybrid combination of steel and polypropylene fibres on high-strength concrete. Polypropylene's compressive and tensile strength, good dielectric characteristics, and acid and alkali resistance have all been explored in various studies. Hence this most promising recycled polypropylene fibre (PPF) needs focus to be investigated in the construction industry.

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“…Physical modifications such as steam (Brugnago et al 2011;Brito et al 2020) and hydrothermal (Qian et al 2015;Liu et al 2016), physical field-assisted chemical modification such as steam-assisted alkali (Saha et al 2010) and ultrasonic-assisted alkali (Krishnaiah et al 2017), and many biological modifications represented by enzyme and seawater have been suggested for their potential to replace pure chemical modification. Among these, seawater modification is a relatively novel area of study, and related reports have rarely been published (Rashid et al 2017a,b;Agrebi et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Synergistic effect of temperature and ultrasonic field on seawater modification of wheat straw fibers

Jiang

Wang

Kong

2021

BioRes

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This study investigated the synergistic effect of temperature and ultrasonic field on seawater modification of wheat straw fibers via orthogonal design. Based on orthogonal results, physicochemical and thermal properties of wheat straw fibers were also reported. The results indicated that a 120 min seawater modification of the fibers at a 70 °C heating temperature and 90 W ultrasonic power increased water absorption. The increase was attributable to the removal of the waxy layer and non-cellulosic materials, which, in turn, decreased the silicon elemental content and hydrogen bonding, as well as increased surface roughness, crystallinity, and thermal stability. The physicochemical and thermal characterization showed that this modification method has potential to be a viable industrial application.

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The influence of steam explosion treatment of green coffee cake on the thermal and mechanical properties of reinforced polypropylene matrix composites

Cited by 21 publications

References 36 publications

A novel natural fiber from plane tree (Platanus orientalis L.) fruits to reinforce polypropylene composites

A novel natural fiber from plane tree (Platanus orientalis L.) fruits to reinforce polypropylene composites

A Comprehensive Summary on the Enhancement of Characteristics of Reinforced Concrete by Employing Polypropylene Materials

Synergistic effect of temperature and ultrasonic field on seawater modification of wheat straw fibers

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