Dispersion and Property Enhancements in Polyolefin/Soy Flour Biocomposites Prepared via Melt Extrusion Followed by Solid‐State Shear Pulverization

Iyer, Krishnan A.; Torkelson, John M.

doi:10.1002/mame.201500019

Cited by 17 publications

(21 citation statements)

References 67 publications

(225 reference statements)

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“…S20/PE80 blend could only be spun into coarse fibers with a large diameter of 85 ± 40 µm. The rheological and morphological characteristics of this composition were comparable with those of LDPE/S blend reported by Iyer and Torkelson …”

Section: Resultssupporting

confidence: 88%

“…The presence of large soy amounts also increases the shear viscosity of the blend as the agglomerates reduce the ability of the polymer chains to flow past each other . In prior studies, Iyer and Torkelson produced S/LDPE composites through a single screw extruder by using a maximum soy content of 40 wt %, and they were fairly brittle. However, these were only extruded, but not drawn‐down.…”

Section: Resultsmentioning

confidence: 99%

“…Literature studies indicate that some of the polysaccharides that have been incorporated into polyolefin matrices behave as component of the blend and not merely as fillers. The dispersion and property enhancements in soy flour/PP/linear low density PE (LLDPE) composites were reported by Iyer and Torkelson . The LDPE and PP composites with 5–40 wt % soy flour were produced by single‐screw, motor‐and‐cup, and two‐step single‐screw extrusion processes followed by solid‐state shear pulverization.…”

Section: Introductionmentioning

confidence: 96%

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Soy‐filled polyethylene fibers for modified surface and hydrophilic characteristics

Güzdemir¹,

Lukubira²,

Ogale³

2018

J of Applied Polymer Sci

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By adding soy flour (soy) to linear low‐density polyethylene (LLDPE), soy‐PE fibers with enhanced hydrophilic characteristics were developed. Blends containing only soy and LLDPE had limited draw‐down, and the resulting thick fibers showed poor mechanical properties. When monoglyceride was added as a compatibilizer, thin fibers with good properties could be successfully spun due to improved dispersion of soy agglomerates in the LLDPE melt. Fibers spun from a blend containing 23/7/70 wt % of soy‐monoglyceride‐LLDPE displayed a tensile modulus and strength of 615 ± 38 and 57 ± 8 MPa, respectively. At 30% less synthetic content, these fibers still displayed mechanical properties generally comparable to those of base polyethylene fibers. Contact angle measurements showed that the soy‐based fibers had a hydrophilic surface (contact angle of 33° ± 4°). Moisture absorption studies confirmed that soy‐PE fibers gained about 20 wt % moisture in 1 h, whereas neat LLDPE fibers did not absorb any significant amount (LLDPE is hydrophobic). This hydrophilic behavior of soy‐PE fibers mimics that of natural fibers. Presence small soy agglomerates on the fiber surface also provides a textured surface and a desired tactile feel to the soy‐PE fibers, which coupled with hydrophilic behavior indicates their potential use in disposable nonwovens. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46609.

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Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

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Soy‐filled polyethylene fibers for modified surface and hydrophilic characteristics

Güzdemir¹,

Lukubira²,

Ogale³

2018

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Biodegradability by definition corresponds to the capacity of the material to be completely assimilated by indigenous micro-organisms in the ecosystem. Every year more than 300 million tons of plastics are produced for different applications [3]. In addition to nonrenewability of the synthetic plastics resource, disposing of those types of plastics in landfill will inevitably release toxins in the soil and underground water.…”

Section: Introductionmentioning

confidence: 99%

High-Content Lignocellulosic Fibers Reinforcing Starch-Based Biodegradable Composites: Properties and Applications

Mehanny¹,

Darwish²,

Ibrahim³

et al. 2016

Composites From Renewable and Sustainable Materials

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Natural source-based composites became promising substitutes and synthetic petrochemical-based counterparts. So far, thermoplastic starch and lignocellulosic fibers are the most common materials for making such eco-friendly "green" materials. Low cost, abundance, and renewability are the factors that lead to deploying these two types of materials. In this chapter, we are conducting further analysis for previously published results of six types of high-content natural fiber-reinforced starch-based composites. All composites were prepared by compression molding under pressure from 5 to 20 MPa and temperature from 130 to 160°C. Composites exhibited highest tensile strength and modulus of elasticity at fiber weight content from 50 to 70%, and then mechanical properties deteriorated significantly at 80% fiber content due to the insufficient starch resin. For instance, the tensile strength was boosted up from 2-12 MPa for thermoplastic starch to reach 55,45,32,28,44, 365 MPa for flax, bagasse, date palm fiber (DPF), banana, bamboo, and hemp composites, when fiber content was increased from 0% to the optimum fiber content (50-70%). Kelly-Tyson (random 2d) was the optimum model to predict random fiber composite. Increasing the fiber content and choosing a fiber with high cellulose content significantly improve the moisture resistance of the composites. Fick's law of diffusion predicted the water uptake property successfully. The thermal stability of composites was improved with increasing the fiber weight content as well. This is attributed to the high thermal stability of cellulose when compared to starch. Properties exhibited by starch-based high-content natural fiber composite are promising for many industrial and biomedical applications.

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“…[2] Various types of additives, especially internal and external lubricants, are used to improve the bulk and surface properties of polyolefins. [3][4][5][6] Internal lubricants are moderately soluble in polymer matrix and allow the molten polymer chains to slide against each another with reduced friction. On the contrary, external lubricants are usually incompatible with the matrix.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Octyltetramethyldisiloxane‐Containing Ethylene Copolymers as Composite Lubricant for High‐Density Polyethylene

Zhang

Fan

et al. 2016

Macro Materials & Eng

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A series of octyltetramethyldisiloxane‐containing ethylene copolymers, poly(ethylene‐co‐OO7) (abbreviated as E‐co‐OO7), are prepared from vanadium catalyzed copolymerization of ethylene with 1‐oct(7‐en)yl‐3‐octyl‐1,1,3,3‐tetramethyldisiloxane (or OO7) macromonomer. The copolymers containing different silicone contents are employed as composite lubricants for high‐density polyethylene (HDPE). The influences of the silicone content in the copolymer and that of the added copolymer amount in the blend on the bulk and surface properties of the blends are systematically investigated. The results show that E‐co‐OO7 exhibits superior overall performance in comparison with conventional lubricants silicone masterbatch and polyethylene wax. Compared to HDPE control, 10 wt% E‐co‐OO7 addition increases the melt flow rates by 49%, increases the elongation at break from 740 to 860%, increases the water‐contact angle from 90° up to 108°, lowers the coefficient of friction from 0.072 to 0.049, lowers the specific wear rate from 11 × 10−3 to 5.6 × 10−3 mm3 Nm−1. The impact strength and high temperature thermal stability are also slightly improved. The measured Si/C atomic ratios demonstrate the sufficient silicone enrichment on surface of the blends. E‐co‐OO7 with 23.5 SiOSi per 1000 C gives the best internal lubrication, and E‐co‐OO7 with 29.7 SiOSi per 1000 C gives the best external lubrication.

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Dispersion and Property Enhancements in Polyolefin/Soy Flour Biocomposites Prepared via Melt Extrusion Followed by Solid‐State Shear Pulverization

Cited by 17 publications

References 67 publications

Soy‐filled polyethylene fibers for modified surface and hydrophilic characteristics

Soy‐filled polyethylene fibers for modified surface and hydrophilic characteristics

High-Content Lignocellulosic Fibers Reinforcing Starch-Based Biodegradable Composites: Properties and Applications

Evaluation of Octyltetramethyldisiloxane‐Containing Ethylene Copolymers as Composite Lubricant for High‐Density Polyethylene

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