Strengthening and toughening of poly(L-lactide) composites by surface modified MgO whiskers

Wen, Wei; Luo, Binghong; Qin, Xiaopeng; Li, Cairong; Liu, Mingxian; Ding, Shan; Zhou, Changren

doi:10.1016/j.apsusc.2015.01.167

Cited by 36 publications

(24 citation statements)

References 34 publications

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“…12 [11]. The difference in this result may be mainly attributed to such differences as the PLLA matrix parameters (e.g., molecular weight and crystallinity), processing method and thickness of the film.…”

Section: Structure and Properties Of The Chw/plla And G-chw/plla Nanomentioning

confidence: 65%

“…Additionally, the hydrophilicity and cytocompatibility of such polyester materials still need to be further improved. To address these issues, different types of organic and inorganic whiskers, such as cellulose and magnesium oxide [8][9][10][11] whiskers, have been incorporated into the PLLA matrix, and markedly enhanced the properties of the nanocomposites. As Wen et al demonstrated, the mechanical strength and toughness of PLLA can be significantly improved by introducing untreated and treated MgO whiskers [11].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nanocomposites of poly( l -lactide) and surface-modified chitin whiskers with improved mechanical properties and cytocompatibility

Liu

Luo

et al. 2016

European Polymer Journal

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Section: Structure and Properties Of The Chw/plla And G-chw/plla Nanomentioning

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Nanocomposites of poly( l -lactide) and surface-modified chitin whiskers with improved mechanical properties and cytocompatibility

Liu

Luo

et al. 2016

European Polymer Journal

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“…Na 2 CO 3 ·10H 2 O, MgCl 2 ·6H 2 O and other reagents were purchased from Guangzhou Chemical Reagent and used without further purification. The MgO‐Ws and g ‐MgO‐Ws were prepared according to our previous report , and the preparation process was briefly depicted in Fig. .…”

Section: Methodsmentioning

confidence: 99%

“…Magnesia whiskers (MgO‐Ws), as the easily available and low‐cost inorganic whiskers with a high tensile strength of 980 MPa and an elastic modulus of 310.1 GPa, have attracted particular interest for use in polymer‐based composites in recent years . In our previous studies , MgO‐Ws and surface grafted MgO‐Ws ( g ‐MgO‐Ws) were added to PLLA matrix to prepare MgO‐Ws/PLLA and g ‐MgO‐Ws/PLLA composite films via a solution casting method. The results of the studies revealed that the introduction of the MgO‐Ws and g ‐MgO‐Ws could improve the tensile properties of the PLLA film.…”

Section: Introductionmentioning

confidence: 99%

Effect of MgO whiskers on thermal behavior and mechanical properties of injection molded poly(L‐lactide)

Wen

Qin

et al. 2018

Polymer Composites

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Poly(L‐lactide) (PLLA) composites containing various content of MgO whiskers (MgO‐Ws) and surface grafted MgO whiskers (g‐MgO‐Ws) were prepared by injection molding technique. The g‐MgO‐Ws showed better dispersion in the matrix and improved interface compatibility with the matrix compared with the MgO‐Ws, which was confirmed by field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). The results of differential scanning calorimeter (DSC) and polarized optical microscopy (POM) of the MgO‐Ws/PLLA and g‐MgO‐Ws/PLLA composites revealed that the crystallization rate and crystallinity of PLLA were improved by the introduction of MgO‐Ws and g‐MgO‐Ws, but the thermogravimetric measurements showed that the thermal stability of the PLLA matrix decreased by the addition of the whiskers. The tensile, flexural, and impact properties of the resulting composites were systematically studied, and the g‐MgO‐Ws/PLLA composite exhibited remarkably higher tensile strength, modulus, and toughness than those of the pure PLLA and MgO‐Ws/PLLA composite. The highest tensile strength of 62.9 ± 3.2 MPa, tensile modulus of 1,222.3 ± 25.2 MPa, and fracture energy of 459.1 ± 24.3 J/m2 were obtained for the g‐MgO‐Ws/PLLA composite with 2.5% whiskers content, which were 30.8%, 13.7%, and 105.5% higher than those of PLLA matrix, respectively. Loading the whiskers with appropriate content can also improve the flexural and impact properties of the PLLA matrix. The highest impact strength, flexural modulus, and flexural strength were obtained for the g‐MgO‐Ws/PLLA composite with 1% whiskers content. POLYM. COMPOS., 39:E1807–E1820, 2018. © 2018 Society of Plastics Engineers

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“…In order to overcome the limitations,various fiber reinforcements, such as glass, carbon, natural fiber, liquid crystalline polymer, are frequently added to polyimide [8].In general, the incorporation of discontinuous fibers into polyimide leads to a dramatic increase in stiffness, strength and fracture toughness [9]. Among all the enhancements, Whisker, with large length-radius-ratio, is a kind of short andfiber-shaped single crystal that arranged in a highly ordered atomic structure [10].In order to improve the comprehensive performance of PI, we proposed SiC whiskers reinforced polyimide composites. The improvement of mechanical properties of the composites is attributed to the effective load transfer from the matrix to the enhancement.…”

Section: Introductionmentioning

confidence: 99%

Strengthening of polyimide composites by SiC whiskers

Liu¹,

Wang²,

Ding³

2016

Proceedings of the 2016 International Symposium on Advances in Electrical, Electronics and Computer Engineering

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Abstract. To improve the strength of the polyimide (PI), composites with SiC whiskers doping in the polyimide matrix were prepared. In order to avoid the conglobation of the whiskers, SiC whiskers pre-dispersed in the ethanol. SiC whiskers/PI composites were prepared by high-speed mechanical stirring. The resulting composites were analyzed in terms of dispersion and deposition of whiskers, mechanical performance by means of scanning electron microscope (SEM) and tensile testing respectively.TheSiC whiskers uniformly distributed in the PI matrix. And there was nearly no SiC whiskers deposition.TheSiC whiskers/PI composites showed better mechanical performance than pure PI.

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Strengthening and toughening of poly(L-lactide) composites by surface modified MgO whiskers

Cited by 36 publications

References 34 publications

Nanocomposites of poly( l -lactide) and surface-modified chitin whiskers with improved mechanical properties and cytocompatibility

Nanocomposites of poly( l -lactide) and surface-modified chitin whiskers with improved mechanical properties and cytocompatibility

Effect of MgO whiskers on thermal behavior and mechanical properties of injection molded poly(L‐lactide)

Strengthening of polyimide composites by SiC whiskers

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