Mechanical, thermal, viscoelastic performance and product application of PP- rice husk Colombian biocomposites

Hidalgo-Salazar, Miguel A.; Salinas, Elizabeth

doi:10.1016/j.compositesb.2019.107135

Cited by 54 publications

(46 citation statements)

References 52 publications

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“…This technique has been shown to preferentially align polymer chains in the flow direction, increasing stiffness and strength as a function of extensional flow intensity. On the other hand, in processes such as thermocompression, the material is molded by the action of temperature and pressure, without subjecting the material to large shear stresses or extensional flow, for which the preferential alignment is almost non-existent [ 44 , 47 ].…”

Section: Resultsmentioning

confidence: 99%

Effect of Extrusion Screw Speed and Plasticizer Proportions on the Rheological, Thermal, Mechanical, Morphological and Superficial Properties of PLA

et al. 2020

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One of the critical processing parameters—the speed of the extrusion process for plasticized poly (lactic acid) (PLA)—was investigated in the presence of acetyl tributyl citrate (ATBC) as plasticizer. The mixtures were obtained by varying the content of plasticizer (ATBC, 10–30% by weight), using a twin screw extruder as a processing medium for which a temperature profile with peak was established that ended at 160 °C, two mixing zones and different screw rotation speeds (60 and 150 rpm). To evaluate the thermo-mechanical properties of the blend and hydrophilicity, the miscibility of the plasticizing and PLA matrix, Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), oscillatory rheological analysis, Dynamic Mechanical Analysis (DMA), mechanical analysis, as well as the contact angle were tested. The results derived from the oscillatory rheological analysis had a viscous behavior in the PLA samples with the presence of ATBC; the lower process speed promotes the transitions from viscous to elastic as well as higher values of loss modulus, storage modulus and complex viscosity, which means less loss of molecular weight and lower residual energy in the transition from the viscous state to the elastic state. The mechanical and thermal performance was optimized considering a greater capacity in the energy absorption and integration of the components.

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Section: Resultsmentioning

confidence: 99%

Effect of Extrusion Screw Speed and Plasticizer Proportions on the Rheological, Thermal, Mechanical, Morphological and Superficial Properties of PLA

et al. 2020

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“…DMA tests were performed using a DMA RSA-G2 (Texas Instruments, Dallas, TX, USA) in three-point bending mode from −80 to 150 • C, a frequency of 1 Hz, a constant heating rate of 3 • C/min and 0.01% of strain (taken from the linear viscoelastic domain of the plot E vs. strain reported earlier for PP and PE [31,32] and PP-natural fiber biocomposites [16,33]). Changes in storage modulus (E ), loss modulus (E"), and tan delta (loss factor) were recorded.…”

Section: Dynamic Mechanical Analysis (Dma)mentioning

confidence: 99%

“…Then the pellets of the different materials were dried in an X-DRY AIR mini dryer (Moretto, Massanzago, Italy) at 60 • C and a dew point of −52 • C. The specimens used for mechanical characterizations (described in Section 2.3.2) were injected in a microinjection molding machine BOY XS (BOY Machines Inc., Exton, PA, USA) with the following parameters: Figure 2 shows the injected flexural specimens of each material. The processing temperatures were set below 200 • C to avoid thermal degradation of the CCF (see Section 3.1), the remaining processing parameters were set based on reviewed literature regarding the processing optimization of natural fiber-polyolefin biocomposites [16,36].…”

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confidence: 99%

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Injection Molding of Coir Coconut Fiber Reinforced Polyolefin Blends: Mechanical, Viscoelastic, Thermal Behavior and Three-Dimensional Microscopy Study

et al. 2020

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In this study, the properties of a polyolefin blend matrix (PP-HDPE) were evaluated and modified through the addition of raw coir coconut fibers-(CCF). PP-HDPE-CCF biocomposites were prepared using melt blending processes with CCF loadings up to 30% (w/w). CCF addition generates an increase of the tensile and flexural modulus up to 78% and 99% compared to PP-HDPE blend. This stiffening effect is caused by a decrease in the polymeric chain mobility due to CCF, the higher mechanical properties of the CCF compared to the polymeric matrix and could be an advantage for some biocomposites applications. Thermal characterizations show that CCF incorporation increases the PP-HDPE thermal stability up to 63 °C, slightly affecting the melting behavior of the PP and HDPE matrix. DMA analysis shows that CCF improves the PP-HDPE blend capacity to absorb higher external loads while exhibiting elastic behavior maintaining its characteristics at higher temperatures. Also, the three-dimensional microscopy study showed that CCF particles enhance the dimensional stability of the PP-HDPE matrix and decrease manufacturing defects as shrinkage in injected specimens. This research opens a feasible opportunity for considering PP-HDPE-CCF biocomposites as alternative materials for the design and manufacturing of sustainable products by injection molding.

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“…Interestingly, the wheat fibre chaff showed excellent thermal conductivity coefficient under steady-state and dynamic conditions (0.307 W m −1 K −1 and 0.298 W m −1 K −1 , respectively) [141]. Several research also established the good thermal resistance of straw fibres BCB [127,[142][143][144][145][146]. Therefore, straw fibres BCB have good thermal insulation effect, which could be mainly used as filling materials in the refrigerator, chemical transportation pipeline insulation material, and thermal insulation layer of building wall surface etc just like in the case of rigid polyurethane foams manufactured from corn straw powder [147].…”

Section: Fibre Typementioning

confidence: 94%

Key advances in development of straw fibre bio-composite boards: An overview

Aladejana

Fan

2020

Mater. Res. Express

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In recent years, considerable attention have been given to the development and utilization of biodegradable fibres for bio-composite boards. This is due to the increase in the environmental consciousness and the need for sustainable development which enable establishment of new materials majorly for packaging, aircraft, furniture, and automobile. Straw fibres (wheat, rice, and corn fibre) are the most available natural agricultural wastes products, which has been utilized for the production of these new materials. This paper hence reviews the enhancement in production methodology and properties of the straw fibres bio-composite boards to add further scientific knowledge to the potentiality of using agricultural fibres as value added products. The future replacement of conventional wood fibres for the production of bio-composite panels, especially with agricultural wastes, could be centered on straw fibres. The introduction of straw fibres in polymer matrices were presented based on various research outcomes. Biodegradable fibres could be regarded as a good fibrous composite material. Although, more efforts are still needed in developing facile straw fibre composite production methods and materials with robust industrial and domestic applications.

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Mechanical, thermal, viscoelastic performance and product application of PP- rice husk Colombian biocomposites

Cited by 54 publications

References 52 publications

Effect of Extrusion Screw Speed and Plasticizer Proportions on the Rheological, Thermal, Mechanical, Morphological and Superficial Properties of PLA

Effect of Extrusion Screw Speed and Plasticizer Proportions on the Rheological, Thermal, Mechanical, Morphological and Superficial Properties of PLA

Injection Molding of Coir Coconut Fiber Reinforced Polyolefin Blends: Mechanical, Viscoelastic, Thermal Behavior and Three-Dimensional Microscopy Study

Key advances in development of straw fibre bio-composite boards: An overview

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