scholarly journals Exploring thermal annealing and graphene-carbon nanotube additives to enhance crystallinity, thermal, electrical and tensile properties of aged poly(lactic) acid-based filament for 3D printing

2019 ◽  
Vol 181 ◽  
pp. 107712 ◽  
Author(s):  
Rumiana Kotsilkova ◽  
Ivanka Petrova-Doycheva ◽  
Dzhihan Menseidov ◽  
Evgeni Ivanov ◽  
Alesya Paddubskaya ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Carbon Nanotube ◽  
3D Printing ◽  
Tensile Properties ◽  
Thermal Annealing ◽  
Poly Lactic Acid

scholarly journals Stress, strain and deformation of poly-lactic acid filament deposited onto polyethylene terephthalate woven fabric through 3D printing process

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Prisca Aude Eutionnat-Diffo ◽  
Yan Chen ◽  
Jinping Guan ◽  
Aurelie Cayla ◽  
Christine Campagne ◽  
...  
Keyword(s):  
Lactic Acid ◽  
3D Printing ◽  
Tensile Properties ◽  
Polyethylene Terephthalate ◽  
Polymeric Materials ◽  
Deposition Process ◽  
Woven Fabric ◽  
Poly Lactic Acid ◽  
Printing Process ◽  
3D Printed

Abstract Although direct deposition of polymeric materials onto textiles through 3D printing is a great technique used more and more to develop smart textiles, one of the main challenges is to demonstrate equal or better mechanical resistance, durability and comfort than those of the textile substrates before deposition process. This article focuses on studying the impact of the textile properties and printing platform temperature on the tensile and deformations of non-conductive and conductive poly lactic acid (PLA) filaments deposited onto polyethylene terephthalate (PET) textiles through 3D printing process and optimizing them using theoretical and statistical models. The results demonstrate that the deposition process affects the tensile properties of the printed textile in comparison with the ones of the textiles. The stress and strain at rupture of the first 3D printed PLA layer deposited onto PET textile material reveal to be a combination of those of the printed layer and the PET fabric due to the lower flexibility and diffusion of the polymeric printed track through the textile fabric leading to a weak adhesion at the polymer/textile interface. Besides, printing platform temperature and textile properties influence the tensile and deformation properties of the 3D printed PLA on PET textile significantly. Both, the washing process and the incorporation of conductive fillers into the PLA do not affect the tensile properties of the extruded polymeric materials. The elastic, total and permanent deformations of the 3D-printed PLA on PET fabrics are lower than the ones of the fabric before polymer deposition which demonstrates a better dimensional stability, higher stiffness and lower flexibility of these materials.

scholarly journals Tensile Properties of Poly Lactic Acid (PLA)–Tungsten Trioxide (WO3) Nano Composites for 3D Printing Process

2019 ◽  
Vol 9 (1) ◽  
pp. 2511-2513
Keyword(s):  
Lactic Acid ◽  
3D Printing ◽  
Tensile Properties ◽  
Tungsten Trioxide ◽  
Control Sample ◽  
Industrial Applications ◽  
Poly Lactic Acid ◽  
Nano Composites ◽  
Aliphatic Polyesters ◽  
Printing Process

Poly Lactic Acid (PLA) is one of the most crucial aliphatic polyesters which is considered as one of the favourable options in environmentally friendly thermoplastic polymers since it could be biodegraded in certain conditions. PLA has been extensively used in the packaging, electronic industries, and household applications. As a result, the improvement of mechanical properties of PLA is necessary, which can be achieved through heat resistant materials such as Tungsten trioxide (WO3 ). The objective of this research was to investigate the tensile properties of PLA-WO3 . The 3D printing process was employed to fabricate PLA-WO3 (3wt% WO3 ) and Neat PLA (control sample). The tensile test was conducted to investigate the effect of WO3 to the PLA. The results show that the tensile properties of PLA-WO3 were improved up to 75% as compared to Neat PLA. This result shows positive indication to the PLA-WO3 for many industrial applications.

scholarly journals Effects of Filament Extrusion, 3D Printing and Hot-Pressing on Electrical and Tensile Properties of Poly(Lactic) Acid Composites Filled with Carbon Nanotubes and Graphene

Nanomaterials ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 35 ◽  
Author(s):  
Giovanni Spinelli ◽  
Rumiana Kotsilkova ◽  
Evgeni Ivanov ◽  
Ivanka Petrova-Doycheva ◽  
Dzhihan Menseidov ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Lactic Acid ◽  
3D Printing ◽  
Tensile Properties ◽  
Hot Pressing ◽  
Multiwall Carbon Nanotubes ◽  
Poly Lactic Acid ◽  
The Matrix ◽  
3D Printed

In this study, the effects of three processing stages: filament extrusion, 3D printing (FDM), and hot-pressing are investigated on electrical conductivity and tensile mechanical properties of poly(lactic) acid (PLA) composites filled with 6 wt.% of multiwall carbon nanotubes(MWCNTs), graphene nanoplatelets (GNPs), and combined fillers. The filaments show several decades’ higher electrical conductivity and 50–150% higher values of tensile characteristics, compared to the 3D printed and the hot-pressed samples due to the preferential orientation of nanoparticles during filament extrusion. Similar tensile properties and slightly higher electrical conductivity are found for the hot-pressed compared to the 3D printed samples, due to the reduction of interparticle distances, and consequently, the reduced tunneling resistances in the percolated network by hot pressing. Three structural types are observed in nanocomposite filaments depending on the distribution and interactions of fillers, such as segregated network, homogeneous network, and aggregated structure. The type of structural organization of MWCNTs, GNPs, and combined fillers in the matrix polymer is found determinant for the electrical and tensile properties. The crystallinity of the 3D printed samples is higher compared to the filament and hot-pressed samples, but this structural feature has a slight effect on the electrical and tensile properties. The results help in understanding the influence of processing on the properties of the final products based on PLA composites.

Morphology and Mechanical Properties of Poly(Lactic Acid) and Propylene-Ethylene Copolymer Blends: Effect of Organoclay Types

2017 ◽  
Vol 737 ◽  
pp. 269-274
Author(s):  
Sirirat Wacharawichanant ◽  
Chaninthon Ounyai ◽  
Ployvaree Rassamee
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Tensile Properties ◽  
Polymer Matrix ◽  
Poly Lactic Acid ◽  
Dispersed Phase ◽  
Copolymer Blends ◽  
Morphology Analysis ◽  
Ethylene Copolymer ◽  
Morphology And Mechanical Properties

The effects of four types of organoclay on morphology and mechanical properties of poly(lactic acid) (PLA)/propylene-ethylene copolymer (PEC) blends were investigated. The ratio of PLA and PEC was 80/20 by weight and the organoclay content was 5 phr. The morphology analysis showed that the addition of all oganocaly types could improve the miscibility of PLA and PEC blends due to the decreased of the domain sizes of PEC dispersed phase in the polymer matrix. The tensile properties showed Young’s modulus of the PLA/PEC blends was improved after adding clay treated surface with 25-30 wt% trimethyl stearyl ammonium.

Preparation and properties enhancement of poly(lactic acid)/calcined‐seashell biocomposites for 3D printing applications

2021 ◽  
pp. 51591
Author(s):  
Mohammed Seddik Razali ◽  
Kamel Khimeche ◽  
Redouane Melouki ◽  
Ammar Boudjellal ◽  
Isabelle Vroman ◽  
...  
Keyword(s):  
Lactic Acid ◽  
3D Printing ◽  
Poly Lactic Acid

scholarly journals Poly(lactic acid)/Carbon Nanotube Fibers as Novel Platforms for Glucose Biosensors

Biosensors ◽  
2012 ◽  
Vol 2 (1) ◽  
pp. 70-82 ◽  
Author(s):  
Juliano Elvis Oliveira ◽  
Luiz Henrique Capparelli Mattoso ◽  
Eliton Souto Medeiros ◽  
Valtencir Zucolotto
Keyword(s):  
Lactic Acid ◽  
Carbon Nanotube ◽  
Poly Lactic Acid ◽  
Glucose Biosensors ◽  
Carbon Nanotube Fibers

Direct 3D Printing of Poly(lactic acid) on Cotton Fibers: Characterization of Materials and Study of Adhesion Properties of the Resulting Composites

2020 ◽  
Vol 394 (1) ◽  
pp. 1900190
Author(s):  
Franco Leonardo Redondo ◽  
María Carolina Giaroli ◽  
Marcelo Armando Villar ◽  
Augusto Gonzaga Oliveira Freitas ◽  
Andrés Eduardo Ciolino ◽  
...  
Keyword(s):  
Lactic Acid ◽  
3D Printing ◽  
Cotton Fibers ◽  
Poly Lactic Acid ◽  
Adhesion Properties ◽  
Characterization Of Materials
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