Crystallization behaviors of biodegradable poly(l-lactic acid)/graphene oxide nanocomposites from the amorphous state

Wang, Huishan; Qiu, Zhaobin

doi:10.1016/j.tca.2011.10.006

Cited by 109 publications

(93 citation statements)

References 35 publications

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“…They added 4 g of PLA and continued agitation at 85°C in 2 h, and sonication at 70°C for another 2 h. The study was carried out to compare the dispersion level between PLA/ lyophilized GNS and PLA/vacuum-filtered GNS nanosheets. In 2011, DMF solution was used as solvent, followed by the sonication method, to prepare nanocomposites by Wang and Qiu [148] to identify the crystallization behaviors of poly(L-lactic acid)/GO nanocomposite, meanwhile Yoon et al [149], studied different GO loading in poly(D,L-lactic-co-glycolic acid)/GO nanocomposite. On the other hand, Pinto et al [150], prepared PLA/GO film nanocomposite using acetone solution, followed by ultrasonic bath for 5 h. Then, the solution was added to a PLA/ chloroform solution and again sonicated for 15 min.…”

Section: Solution Intercalationmentioning

confidence: 99%

Graphene modifications in polylactic acid nanocomposites: a review

Norazlina

Yusoh

2015

Polym. Bull.

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Considerable interest has been devoted to graphene since this material has shown promising and excellent results in mechanical and thermal properties. This finding has attracted more researchers to discover the attributes of graphene due to its extensive and potential applications. This paper reviewed the recent advances in the modification of graphene and the fabrication of polylactic acid/ graphene nanocomposite. The different techniques that have been employed to prepare graphene, such as reduction of graphene oxide and chemical vapor deposition, are discussed briefly. The preparations of PLA/graphene nanocomposites are described using in situ polymerization, solution, and melt blending; and the properties of these nanocomposites are reviewed. Due to the difficulties in obtaining good dispersions, modifications of nanomaterials have been the critical issues that lead to excellent mechanical properties.

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Section: Solution Intercalationmentioning

confidence: 99%

Graphene modifications in polylactic acid nanocomposites: a review

Norazlina

Yusoh

2015

Polym. Bull.

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“…The investigation of literature shows that the mechanical properties of electrospun PCL nanofibers improve at the presence of different nanoparticles [7,8,11,12]. Among different nanoparticles, graphene and its derivatives could present a higher improvement in mechanical properties due to their higher surface area than other nanoparticles [13][14][15][16][17][18]. However there are few studies on the mechanical properties of electrospun PCL fibers in the presence of different amounts of GO and RGO.…”

Section: Introductionmentioning

confidence: 99%

Aligned poly(ε-caprolactone)/graphene oxide and reduced graphene oxide nanocomposite nanofibers: Morphological, mechanical and structural properties

Ramazani

Karimi

2015

Materials Science and Engineering: C

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“…The effect of graphene on crystallinity and its correlation with shape memory and thermomechanical properties are studied. To the best of our knowledge, although some studies have been done on the PLLA/ graphene system [40][41][42][43][44] until now, but this system is not already reported and described in the literature in terms of shape memory behavior. On the other hand, the infrared triggering of shape memory PLLA has not been investigated so far and our experimental evidence regarding infrared sensitivity of PLLA/ graphene composites can be helpful for designing remote controlling shape memory devices.…”

Section: Introductionmentioning

confidence: 99%

Shape memory nanocomposite of poly(L-lactic acid)/graphene nanoplatelets triggered by infrared light and thermal heating

Lashgari¹,

Karrabi²,

Ghasemi³

et al. 2016

Express Polym. Lett.

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Abstract. In this study, the effect of graphene nanoplatelets (GNPs) on the shape memory properties of poly(L-lactic acid) (PLLA) was studied. In addition to thermal activation, the possibility of infrared actuating of thermo-responsive shape memory PLLA/GNPs nanocomposite was investigated. The incorporated GNPs were expected to absorb infrared wave's energy and activate shape memory PLLA/GNPs. Different techniques such as differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD), field emission gun scanning electron microscope (FEG-SEM) and dynamic mechanical thermal analysis (DMTA) were used to characterize samples. DSC and WAXD results indicated that GNPs augmented crystallinity due to nucleating effect of graphene particles. GNPs improved both thermal and infrared activating shape memory properties along with faster response. Pure shape memory PLLA was slightly responsive to infrared light and its infrared actuated shape recovery ratio was 86% which increased to more than 95% with loading of GNPs. Drastic improvement in the crystallinity was obtained in nanocomposites with lower GNPs contents (0.5 and 1 wt%) due to finer dispersion of graphene which resulted in more prominent mechanical and shape memory properties enhancement. Infrared activated shape memory PLLA/GNPs nanocomposites can be developed for wireless remote shape control of smart medical and bio-systems.

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Crystallization behaviors of biodegradable poly(l-lactic acid)/graphene oxide nanocomposites from the amorphous state

Cited by 109 publications

References 35 publications

Graphene modifications in polylactic acid nanocomposites: a review

Graphene modifications in polylactic acid nanocomposites: a review

Aligned poly(ε-caprolactone)/graphene oxide and reduced graphene oxide nanocomposite nanofibers: Morphological, mechanical and structural properties

Shape memory nanocomposite of poly(L-lactic acid)/graphene nanoplatelets triggered by infrared light and thermal heating

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