Preparation and properties of heat resistant polylactic acid (PLA)/Nano-SiO2 composite filament

Wu, Gaihong; Liu, Shuqiang; Jia, Husheng; Dai, Jinming

doi:10.1007/s11595-016-1347-2

Cited by 28 publications

(21 citation statements)

References 15 publications

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“…Blending easily degradable biomaterials, such as PGA and PEG, with PLA has also been proven to accelerate the degradation rate of PLA composite, but the strength of composite is usually decreased [17,18,19]. Thirdly, some nano-scale inorganic materials, e.g., nano-SiO 2 [20] and nano-montmorillonite (nano-MMT), blended with PLA, have also been used to regulate the degradation rate and time of PLA-based sutures. Min et al [21] mixed nano-MMT with PLA and produced PLA/nano-MMT fibers from this mixture, and the fiber demonstrated degradation acceleration compared to the pure PLA fiber, but the mechanical properties of the new fiber was found to decrease.…”

Section: Introductionmentioning

confidence: 99%

Degradation Behavior In Vitro of Carbon Nanotubes (CNTs)/Poly(lactic acid) (PLA) Composite Suture

Liu

Chen

et al. 2019

Polymers

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Poly(lactic acid) (PLA) suture can be absorbed by the human body, and so have wide applications in modern surgery operations. The degradation period of PLA suture is expected to meet with the healing time of different types of wounds. In order to control the degradation period of the PLA suture, the carbon nanotubes (CNTs) were composited with PLA suture, and the degradation experiment in vitro was performed on sutures. The structure and properties of sutures during degradation, such as surface morphology, breaking strength, elongation, mass and chemical structure, were tracked and analyzed. The results indicated that the degradation brought about surface defects and resulted in 13.5 weeks for the strength valid time of the original PLA suture. By contrast, the strength valid time of the CNTs/PLA suture was increased to 26.6 weeks. Whilst the toughness of both the pure PLA and CNTs/PLA sutures decreased rapidly and almost disappeared after 3 to 4 weeks of degradation. The mass loss demonstrated that the time required for complete degradation of the two sutures was obviously different, the pure PLA suture 49 weeks, while CNTs/PLA sutures 63 to 73 weeks. The research proved that CNTs delayed PLA degradation and prolonged its strength valid time in degradation.

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Section: Introductionmentioning

confidence: 99%

Degradation Behavior In Vitro of Carbon Nanotubes (CNTs)/Poly(lactic acid) (PLA) Composite Suture

Liu

Chen

et al. 2019

Polymers

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“…The iconicity softener appeared not to play a significant role. Wu et al [8] reported that using 1 wt% nano-SiO 2 modified by KH-550 of PLA filament could improve the break elongation to 33.36%. Randa and Selling [9] pointed out that the tensile strength of PLA/Starch composite filaments, with the draw ratio 2:1, can be increased to 92 MPa, and the break elongation can be improved to 136%.…”

Section: Introductionmentioning

confidence: 99%

The manufacture of 3D printing of medical grade TPU

Xiao

Gao

2017

Prog Addit Manuf

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There is a critical need for developing medical grade polymer filament to be used for 3D printing. In this work, a new filament made by medical grade thermoplastic polyurethanes (TPU) was produced by a single-screw extruder, and then tensile dumbbell specimens were printed by a fused deposition modeling (FDM) machine. In the FDM process, the effects of the orientation angle and printing temperature on part quality were studied. For each process, we aimed to achieve good quality parts by evaluating their tensile strength and break elongation. Microstructure analyses were performed on the dumbbell center and fracture surface of the tensile specimens, through the use of USB dignity microscopy. TPU specimens with the best mechanical properties made by FDM have 46.7 MPa tensile strength and 702% break elongation; they were processed under the condition of 215°C temperature and a 45°orientation angle.

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“…Moreover, some types of nanomaterials (e.g. nanomica, nano-kaolinite and nano-montmorillonite) acting as nucleating agents [17][18][19] one-sidely speeded up the crystallization of PLA, so the mechanical properties of PLA would get worse instead.…”

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confidence: 99%

Crystallization behavior and mechanical properties of poly(lactic acid) complex fiber toughened by carbon nanotube nanocapsules

Liu

Xiao

et al. 2017

Textile Research Journal

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Poly(lactic acid) (PLA) fiber, owing to its biocompatibility and biodegradability, could be widely used in many related industrial areas. However, high brittleness has been the main obstacle to expanding its applications. So in this paper, carbon nanotube (CNT) nanocapsules were designed to toughen PLA and further reported their effect on the crystallization behavior and mechanical properties of PLA complex fiber. These designed CNT nanocapsules successfully solved the agglomeration of CNTs within the PLA matrix as well as the compatibility issue. In addition, the morphological, mechanical, optical and thermal properties of PLA complex fibers were also studied. The addition of CNT nanocapsules obviously improved the crystallization behavior of PLA fiber. Furthermore, compared with pure PLA, the tensile strength of PLA complex fiber was enhanced by 30.62% and the elongation by 32.2%, so the designed CNT nanocapsules could be used as a toughener for PLA fiber. This research benefits the extension of PLA applications where toughness is an important factor.

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Preparation and properties of heat resistant polylactic acid (PLA)/Nano-SiO2 composite filament

Cited by 28 publications

References 15 publications

Degradation Behavior In Vitro of Carbon Nanotubes (CNTs)/Poly(lactic acid) (PLA) Composite Suture

Degradation Behavior In Vitro of Carbon Nanotubes (CNTs)/Poly(lactic acid) (PLA) Composite Suture

The manufacture of 3D printing of medical grade TPU

Crystallization behavior and mechanical properties of poly(lactic acid) complex fiber toughened by carbon nanotube nanocapsules

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