Influence of alkali treatment on flax fiber for use as reinforcements in polylactide stereocomplex composites

Zhang, Huihui; Ming, Ruihao; Yang, Gesheng; Yu-zeng, LI; Qiao, Li; Shao, Huili

doi:10.1002/pen.24147

Cited by 59 publications

(32 citation statements)

References 28 publications

(44 reference statements)

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“…The increased interaction between the PF and the PLA matrix could further cause the fiber surface to act as nucleation sites for PLA crystallization. Consequently, the PF and PLA composites had increased crystallinity compared to those of composites reinforced with WF …”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, the WF surface was rougher than the PF surface because of the middle lamellar materials (wax, pectin, lignin, and hemicellulose) remaining on the WF surface [Figure (a)]. However, after BECMP treatment, most of the substances associated with the cellulose were removed, resulting in the smooth and clear PF surface shown in Figure (b) …”

Section: Resultsmentioning

confidence: 99%

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Bleached extruder chemi‐mechanical pulp fiber‐PLA composites: Comparison of mechanical, thermal, and rheological properties with those of wood flour‐PLA bio‐composites

Yang

Feng

et al. 2016

J of Applied Polymer Sci

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An environmentally friendly bleached extruder chemi-mechanical pulp fiber or wood flour was melt compounded with poly(lactic acid) (PLA) into a biocomposite and hot compression molded. The mechanical, thermal, and rheological properties were determined. The chemical composition, scanning electron microscopy, and Fourier transform infrared spectroscopy results showed that the hemicellulose in the pulp fiber raw material was almost completely removed after the pulp treatment. The mechanical tests indicated that the pulp fiber increased the tensile and flexural moduli and decreased the tensile, flexural, and impact strengths of the biocomposites. However, pulp fiber strongly reinforced the PLA matrix because the mechanical properties of pulp fiber-PLA composites (especially the tensile and flexural strengths) were better than those of wood flour-PLA composites. Differential scanning calorimetry analysis confirmed that both pulp fiber and wood flour accelerated the cold crystallization rate and increased the degree of crystallinity of PLA, and that this effect was greater with 40% pulp fiber. The addition of pulp fiber and wood flour modified the rheological behavior because the composite viscosity increased in the presence of fibers and decreased as the test frequency increased.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Bleached extruder chemi‐mechanical pulp fiber‐PLA composites: Comparison of mechanical, thermal, and rheological properties with those of wood flour‐PLA bio‐composites

Yang

Feng

et al. 2016

J of Applied Polymer Sci

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“…It indicated that the content of PEG was increased in the reed samples after modification, and it further illustrated that the modifier penetrated well into the reed stalk. The absorption peak at 2888 cm -1 represents the stretching vibration of methylene (-CH2) (Zhang et al 2015). The intensity of the methylene absorption peak decreased after PEG modification and decreased with the increase in PEG molecular weight.…”

Section: Ft-ir Characterizationmentioning

confidence: 99%

Enhanced toughness of reed (Phragmites australis) stalk with polyethylene glycol

Zhao

Wang

Shang

et al. 2020

BioRes

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Reed (Phragmites australis) is a cosmopolitan grass that is often the dominant species in the ecosystems it inhabits. It is widely used in furniture decoration as reed weaving products. However, the application of reed is limited due to its brittle nature and susceptibility to cracks. To increase the toughness of reed stalk, sodium chlorite (NaClO2) was used to remove the lignin from reed stalk, and then polyethylene glycol with different molecular weights (PEG 600, PEG 1000, PEG 2000, and PEG 4000) was used as a plasticizer. The micromorphology, crystal structure, and surface chemical composition of the modified reed stalk were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FT-IR). The bending strength and dynamic thermomechanical analysis (DMA) of the reed stalk were evaluated. The results showed that the delignified reed stalks plasticized with PEG 1000 or PEG 2000 showed better dimensional stability and toughness, and the smallest elastic modulus (133.268 MPa) was obtained when the samples were treated with PEG 2000. The results of thickness swelling showed that the dimensional stability increased after PEG modification. This research may provide the theoretical basis for the modification of reed stalk.

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“…Polylactic acid (PLA) has attracted considerable research interest owing to its good biocompatibility and biodegradability [ 1 , 2 , 3 , 4 , 5 , 6 , 7 ]. However, its disadvantages, such as poor heat-deflection temperature (HDT: 50 °C for neat PLA) and slow crystallization rate, limit its application [ 8 , 9 , 10 , 11 , 12 , 13 ]. HDT is a crucial physical quantity used to characterize the heat resistance of polymeric materials [ 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Crystallization Morphology Regulation on Enhancing Heat Resistance of Polylactic Acid

et al. 2020

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To expand the use of polylactic acid (PLA) in high-temperature environments, crystallization morphology regulation was studied to enhance the heat resistance of PLA. PLA crystallinity was controlled using heat treatment and nucleating agent (zinc phenylphosphonate, brand TMC). The heat deflection temperatures of PLAs with same crystallinities considerably varied using different treatments. The crystallization morphology of PLA (4032D) and PLA/TMC composites was studied using X-ray diffraction (XRD) and polarized optical microscopy. XRD test results show that TMC can improve the crystallization rate and heat treatment can enhance the crystallinity and thickness of PLA, suggesting that the crystallization morphology improved after heat treatment. Nucleating agents can increase the crystallinity of PLA but cannot improve its crystallization morphology. The findings indicate that at the same crystallinity, PLAs exhibit improved crystallization morphology and high heat resistance; these results can provide guidance for improving the heat resistance of PLAs and facilitate the design of new nucleating agents.

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Influence of alkali treatment on flax fiber for use as reinforcements in polylactide stereocomplex composites

Cited by 59 publications

References 28 publications

Bleached extruder chemi‐mechanical pulp fiber‐PLA composites: Comparison of mechanical, thermal, and rheological properties with those of wood flour‐PLA bio‐composites

Bleached extruder chemi‐mechanical pulp fiber‐PLA composites: Comparison of mechanical, thermal, and rheological properties with those of wood flour‐PLA bio‐composites

Enhanced toughness of reed (Phragmites australis) stalk with polyethylene glycol

Crystallization Morphology Regulation on Enhancing Heat Resistance of Polylactic Acid

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