Effects of Extractives on Dimensional Stability, Dynamic Mechanical Properties, Creep, and Stress Relaxation of Rice Straw/High-Density Polyethylene Composites

Wang, Huanbo; Lin, Fazhi; Qiu, Pingping; Liu, Tian

doi:10.3390/polym10101176

Cited by 13 publications

(11 citation statements)

References 31 publications

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“…The homogeneously dispersed CW‐RS, HW‐RS, and AL‐RS in the extracted RS/HDPE composites (Figure 6) proved that the extracted RS fibers were between coated well by the HDPE matrix. The dimensional stability, dynamic mechanical properties, creep, and stress relaxation investigated by our group confirmed that the inner bonding of RS/HDPE was poor and the removal of the extractives of RS improved the combination between the RS and the HDPE matrix and enhanced the inner bonding of the composites 45 …”

Section: Resultsmentioning

confidence: 60%

“…The dimensional stability, dynamic mechanical properties, creep, and stress relaxation investigated by our group confirmed that the inner bonding of RS/HDPE was poor and the removal of the extractives of RS improved the combination between the RS and the HDPE matrix and enhanced the inner bonding of the composites. 45 Die swell is a common phenomenon in HDPE composites extrusion and there was evident die swell in the RS/HDPE composites during processing (Figure 7). 24,25 The thickness of the RS/HDPE expanded 35.75%.…”

Section: The Internal State Of Rs/hdpe Compositesmentioning

confidence: 99%

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Inner defects elimination and significant reinforcement of rice straw/high‐density polyethylene composites by extractives removal process

Lin

Wang

Yue

et al. 2020

J of Applied Polymer Sci

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The effects on the internal defects of the rice straw (RS)/high-density polyethylene (HDPE) composites are investigated by removing the extractives with cold water (CW), hot water (HW), and 1% alkaline (AL) solution. The characteristics of the RSs are measured by chemical composition, Fourier transform infrared, X-ray diffractometry, scanning electron microscopy, thermogravimetric analysis, and bulk density testing. The three extractive removal methods change the surface features of the RS and increase the interphase adhesion between the RS and the HDPE matrix. As a result, the inner defects of the RS/HDPE composites are eradicated and the die swell phenomenon disappear. The flexural modulus, flexural strength, and impact strength of the final composites increase by 95.59, 83.29, and 154.79% in the HW extraction method. The CW and the AL extraction also significantly improve the static mechanical properties of the obtained RS/HDPE composites.

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Section: Resultsmentioning

confidence: 60%

Section: The Internal State Of Rs/hdpe Compositesmentioning

confidence: 99%

Inner defects elimination and significant reinforcement of rice straw/high‐density polyethylene composites by extractives removal process

Lin

Wang

Yue

et al. 2020

J of Applied Polymer Sci

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“…Therefore, the literature shows how different types of fillers have been incorporated into HDPE to produce low cost HDPE composites, obtaining materials with improved mechanical properties and less environmental impact [ 22 , 23 , 24 ]. Most of these composites use mineral fillers [ 25 ] or fillers from agricultural waste [ 26 , 27 ]. Unlike agroforestry waste fillers, fillers from leather industry waste are rarely reported.…”

Section: Introductionmentioning

confidence: 99%

Leather Waste to Enhance Mechanical Performance of High-Density Polyethylene

et al. 2020

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Leather buffing dust (BF) is a waste from tannery which is usually disposed on landfills. The interest in using wastes as fillers or reinforcements for composites has raised recently due to environmental concerns. This study investigates the potential use of BF waste as filler for a high density polyethylene matrix (HDPE). A series of HDPE-BF composites, containing filler concentrations ranging from 20 to 50wt%, were formulated, injection molded and tested. The effect of filler contents on the mechanical properties of the composites were evaluated and discussed. Composites with BF contents up to 30wt% improved the tensile strength and Young’s modulus of the matrix, achieving similar mechanical properties to polypropylene (PP). In the case of flexural strength, it was found to be proportionally enhanced by increasing reinforcement content, maintaining high impact strength. These composites present great opportunities for PP application areas that require higher impact resistance. The materials were submitted to a series of closed-loop recycling cycles in order to assess their recyclability, being able to maintain better tensile strength than virgin HDPE after 5 cycles. The study develops new low-cost and sustainable composites by using a waste as composite filler.

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“…Recent studies have used RS in the form of short fiber or particulate. 8,15,[21][22][23][24][25][26] The aim of this study is to form RS in a sheet in which the RS was bonded with each other uniformly. These sheets of RS fibers help to fabricate RS/polyester composites with any complex geometry.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of developed rice straw sheets and glass fiber-reinforced polyester composites

Megahed

Ali-Eldin

Moezz

et al. 2020

Journal of Composite Materials

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In this study, a sheet of random rice straw fiber was developed. These rice straw sheets were used to reinforce polyester matrix. Synthesis of rice straw sheets and glass fibers as synthetic fibers-reinforced polyester composites were investigated. Several new stacking sequences were fabricated with random glass fiber mats with different areal densities (225 g/m2, 300 g/m2, and 450 g/m2) and rice straw sheets. The specific mechanical properties of these natural/synthetic fiber composites were investigated. Scanning electron microscopy was used to study the morphology of the fracture surfaces of the fabricated hybrid composites. Experimental results showed that specific tensile and flexural stiffness of rice straw fiber composite is better those obtained with glass fiber composites. The hybrid natural/synthesis composites with alternating glass fiber mat with areal densities 300 g/m2, and rice straw shows higher specific tensile strength than rice straw and other hybrid composites. Hybrid composites with high areal density on the outer surfaces yield a significant increase in flexural-specific strength and hardness as compared to other fabricated composites.

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Effects of Extractives on Dimensional Stability, Dynamic Mechanical Properties, Creep, and Stress Relaxation of Rice Straw/High-Density Polyethylene Composites

Cited by 13 publications

References 31 publications

Inner defects elimination and significant reinforcement of rice straw/high‐density polyethylene composites by extractives removal process

Inner defects elimination and significant reinforcement of rice straw/high‐density polyethylene composites by extractives removal process

Leather Waste to Enhance Mechanical Performance of High-Density Polyethylene

Synthesis of developed rice straw sheets and glass fiber-reinforced polyester composites

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