The morphology, rheological, and mechanical properties of wood flour/starch/poly(lactic acid) blends

Lv, Shanshan; Gu, Jiyou; Tan, Hongbo; Zhang, Yanhua

doi:10.1002/app.44743

Cited by 18 publications

(23 citation statements)

References 40 publications

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“…The reduced damping peak in this study is an indicative of effective reinforcement. The results are in contrary to the PLA/starch/WF composites by Lv et al . where increasing WF resulted in increasing height of damping peak.…”

Section: Resultscontrasting

confidence: 99%

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Mechanical and thermal properties of wood fibers reinforced poly(lactic acid)/thermoplasticized starch composites

Raghu

Kale

Raj

et al. 2017

J of Applied Polymer Sci

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Thermoplasticized starch (TPS) filled poly(lactic acid) (PLA) blends are usually found to have low mechanical properties due to poor properties of TPS and inadequate adhesion between the TPS and PLA. The purpose of this study was to investigate the reinforcing effect of wood fibers (WF) on the mechanical properties of TPS/PLA blends. In order to improve the compatibility of wood with TPS/PLA blends, maleic anhydride grafted PLA (MA‐g‐PLA) copolymer was synthesized and used. TPS, TPS/PLA blends, and WF reinforced TPS/PLA composites were prepared by twin‐screw extrusion and injection molded. Scanning electron microscope and crystallinity studies indicated thermoplasticity in starch. WF at two different weight proportions, that is, 20% and 40% with respect to TPS content were taken and MA‐g‐PLA at 10% to the total weight was chosen to study the effect on mechanical properties. At 20% WF and 10% MA‐g‐PLA, the tensile strength exhibited 86% improvement and flexural strength exhibited about 106% improvement over TPS/PLA blends. Increasing WF content to 40% further enhanced tensile strength by 128% and flexural strength by 180% with respect to TPS/PLA blends. Thermal behavior of blends and composites was analyzed using dynamic mechanical analysis and thermogravimetric analysis. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46118.

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Section: Resultscontrasting

confidence: 99%

“…This is primarily due to thermal degradation of wood which takes places in the overlapping temperature ranges of TPS and PLA (250 to 350 °C). Lv et al . also observed the single step degradation in PLA/starch/wood fiber composites.…”

Section: Resultsmentioning

confidence: 88%

Mechanical and thermal properties of wood fibers reinforced poly(lactic acid)/thermoplasticized starch composites

Raghu

Kale

Raj

et al. 2017

J of Applied Polymer Sci

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“…The pure PLA had a tensile strength of 43.79 ± 0.84 MPa and an elongation at break of 7.00%. The tensile strength of the PWF/PLA composites with PWF content of 5 wt.% reached the maximum tensile strength of 52.54 MPa (increment of 20%), while the elongation at break also reached a maximum of 8.52% (increment of 21.8%), which can be due to the fact that an appropriate amount of PWF restricted the mobility of the polymer chains and excess PWF led to the poor interfacial interaction between the PWF and the polymer matrix [29]. It is shown in Figure 5b that the flexural strength of every PWF/PLA composites in our experiments is higher than that of pure PLA, and the flexural modulus of PLA increases with increasing content of PWF.…”

Section: Elemental Analysismentioning

confidence: 98%

“…These results demonstrated that the PWF improved the flexural strength at an appropriate concentration, due to its characteristic ratio of length to diameter. Moreover, the interaction between the filler and the PLA matrix was reduced with the addition of excess PWF, and this poor interaction was not effective in transferring the load to the filler [29,30]. Therefore, in the following studies, poly (lactic acid) was used as the matrix, and 5 wt.% particleboard wood flour and different contents of micrometer copper-zinc alloy particles were incorporated as reinforcement.…”

Section: Elemental Analysismentioning

confidence: 99%

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Micrometer Copper-Zinc Alloy Particles-Reinforced Wood Plastic Composites with High Gloss and Antibacterial Properties for 3D Printing

et al. 2020

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In this work, micrometer copper-zinc alloy particles-reinforced particleboard wood flour/poly (lactic acid) (mCu-Zn/PWF/PLA) wood plastic composites with high gloss and antibacterial properties for 3D printing were prepared by a melt blending process. The structure and properties of the composites with different contents of mCu-Zn were analyzed by means of mechanical testing, dynamic mechanical analysis, thermogravimetric analysis, differential scanning calorimetry, X-ray diffraction, scanning electron microscopy, and antibacterial testing. The results showed that the mechanical properties, thermal stability, and antibacterial performance of the composites were significantly improved, as mCu-Zn was added into the wood plastic composites. When adding 2 wt.% mCu-Zn, the flexural strength of mCu-Zn/PWF/PLA composites (with 5 wt.% of particleboard wood flour) (PWF) increased by 47.1% compared with pure poly (lactic acid) (PLA), and 18.9% compared with PWF/PLA wood plastic composites. The surface gloss was increased by 1142.6% compared with PWF/PLA wood plastic composites. Furthermore, the inhibition rates of mCu-Zn/PWF/PLA composites against Escherichia coli reached 90.43%. Therefore, this novel high gloss and antibacterial wood plastic composites for fused deposition modeling (FDM) 3D printing have potential applications in personalized and classic furniture, art, toys, etc.

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Interface compatibility and mechanisms of improved mechanical performance of starch/poly(lactic acid) blend reinforced by bamboo shoot shell fibers

Guan

Zhang

Yong

et al. 2019

J of Applied Polymer Sci

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Bamboo shoot shell fibers (BSSFs)/starch/poly(lactic acid) (PLA) ternary composites were prepared by blending BSSFs to starch/PLA matrices for the purpose of expanding BSSFs applications to enhance starch/PLA composites and creating a new low-cost biodegradable composite. The effects of BSSFs content (0-40 wt %) on the physical-mechanical properties were tested and interface compatibility and its mechanism to mechanical performance of BSSFs/starch/PLA composites were characterized by SEM-EDS, TG. The results showed that the mechanical strength, surface wettability, and water absorption of the composites continued improving when the BSSFs content increased from 0% to 20 wt %. However, mechanical modulus increased with increase in BSSFs content. The results of fracture microstructure and thermal property exhibited a good interfacial compatibility at low content of BSSFs and an interface debonding at high content of BSSFs. These investigations indicated that the BSSFs reinforcement to the composite is not consistent with interface compatibility of the ternary composites. The composites should be considered as a kind of green and low-cost biodegradable materials to replace traditional single-phase or multiphase materials.

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The morphology, rheological, and mechanical properties of wood flour/starch/poly(lactic acid) blends

Cited by 18 publications

References 40 publications

Mechanical and thermal properties of wood fibers reinforced poly(lactic acid)/thermoplasticized starch composites

Mechanical and thermal properties of wood fibers reinforced poly(lactic acid)/thermoplasticized starch composites

Micrometer Copper-Zinc Alloy Particles-Reinforced Wood Plastic Composites with High Gloss and Antibacterial Properties for 3D Printing

Interface compatibility and mechanisms of improved mechanical performance of starch/poly(lactic acid) blend reinforced by bamboo shoot shell fibers

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