Shear induced alignment of short nanofibers in 3D printed polymer composites

Yunus, Doruk Erdem; Shi, Wentao; Sohrabi, Salman; Liu, Yaling

doi:10.1088/0957-4484/27/49/495302

Cited by 67 publications

(58 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Recently, reinforcements of different natures have been aligned in polymer matrices during three‐dimensional (3D) printing to achieve a higher degree of control over the enhanced properties of the final structure. For instance, alumina nanowires were aligned during stereolithography (SLA) printing of a composite using shearing force in the fluid through a mechanical oscillator to improve the mechanical properties of the composite . Various conductive nanoparticles were aligned by applying an acoustic field during the additive manufacturing of polymer matrix nanocomposites .…”

Section: Introductionmentioning

confidence: 99%

“…For instance, alumina nanowires were aligned during stereolithography (SLA) printing of a composite using shearing force in the fluid through a mechanical oscillator to improve the mechanical properties of the composite. 16 Various conductive nanoparticles were aligned by applying an acoustic field during the additive manufacturing of polymer matrix nanocomposites. 17 In addition, acoustic waves were used to align nanoparticles that were then coupled with a fused deposition modeling extruder to fabricate 3D printed structures.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electrical and mechanical tuning of 3D printed photopolymer–MWCNT nanocomposites through in situ dispersion

Chavez

Regis

Delfin

et al. 2019

J of Applied Polymer Sci

View full text Add to dashboard Cite

An electric field‐assisted in situ dispersion of multiwall carbon nanotubes (MWCNTs) in polymer nanocomposites, fabricated through stereolithography three‐dimensional (3D) printing technique, was demonstrated. The introduction of MWCNTs increased the elasticity modulus of the polymer resin by 77%. Furthermore, the use of an electric field for in situ MWCNT dispersion helped improving the average elongation at break of the samples with MWCNTs by 32%. The electric field also increased the ultimate tensile strength of the MWCNT reinforced nanocomposites by 42%. An increase of over 20% in the ultimate tensile strength of in situ dispersed MWCNT nanocomposites over the pure polymer material was observed. Finally, it was demonstrated that the magnitude and direction of the electrical conductivity of MWCNT nanocomposites can be engineered through the application of in situ electric fields during 3D printing. An increase of 50% in the electrical conductivity was observed when MWCNTs were introduced, while the application of the electric field further improved the electrical conductivity by 26%. The presented results demonstrated the feasibility of tuning both electrical and mechanical properties of MWCNT reinforced polymer nanocomposites using in situ electrical field‐assisted 3D printing. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47600.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrical and mechanical tuning of 3D printed photopolymer–MWCNT nanocomposites through in situ dispersion

Chavez

Regis

Delfin

et al. 2019

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Refocused image on the bottom of the slurry tank has the pixel size of 25 µm. Micro wall patterns are produced to generate shear induced alignment of short fiber reinforcement into the desired orientation with similar manner with our previous study for short nanofiber reinforced polymer [20]. Then linear sliding mechanism, which has a resolution of 10 µm, is actuated to generate oscillatory simple shear flow in the produced channels between the micro walls.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, fiber alignment can be used to tailor the material properties of 3D printed composite pieces, such as mechanical [18] and electrical [19]. We demonstrated shear induced alignment during SLA 3DP for reinforced polymer composites (RPC) at our previous study [20]. In this work, same approach was utilized for 3DP of ceramic composites.…”

Section: Introductionmentioning

confidence: 99%

Short fiber reinforced 3d printed ceramic composite with shear induced alignment

Yunus

Shi

et al. 2017

Ceramics International

Self Cite

View full text Add to dashboard Cite

This paper accounts for utilization of shear induced alignment method during ceramic stereolithography. Lateral oscillation mechanism, combined with 3d printed wall pattern, was employed to generate necessary shear to align fiber in desired direction. First, semicircular channel pattern was printed to assess the effect of difference between wall direction and oscillation direction on the fiber alignment. Then, flexural strength of ceramic matrix was tested with nickel coated carbon fiber and ceramic fiber reinforcements. The results demonstrated that the shear induced alignment further improves the flexural strength compare to randomly distributed samples. Flexural strength of aligned samples with 1.0 wt% carbon fiber loading was improved by ~90% compared to randomly orientated samples and by ~333% compared to unreinforced samples. Finally, fracture surface morphology of the flexural strength test specimens was evaluated. The main fracture mechanism was observed as fiber pull-out.

show abstract

“…During extrusion of the inks through the printing nozzle in DIW and FDM, shear forces enable the alignment of anisotropic nanoparticles . This shear‐induced alignment has been used to orient GO sheets (Figure b) .…”

Section: Printing Of 3d Graphene Nanomaterialsmentioning

confidence: 99%

3D Assembly of Graphene Nanomaterials for Advanced Electronics

Ferrand

Chabi

Agarwala

2020

Advanced Intelligent Systems

View full text Add to dashboard Cite

Since the discovery of electricity and the creation of the first transistors two centuries ago, the field of electronics has evolved rapidly to become omnipresent. Today, electronic devices are challenged by new demands in function and performance: they are expected to be lightweight, highly efficient, flexible, smart, implantable, and so on. To meet these demands, the materials and components in devices need to be carefully selected and assembled together. In this regard, the controlled assembly of 3D graphene structures holds tremendous potential to achieve such levels of multifunctionality and outstanding properties. Advanced processing approaches, such as 3D printing, allow the fabrication of a variety of 3D graphene–based materials that present outstanding properties and a high degree of multifunctionality. Herein, the recent progress in the fabrication of graphene‐based devices for advanced electronics using controlled assembly is reported. The benefits of controlling the microstructure of graphene nanomaterials for enhanced properties and functionalities are highlighted, and the various fabrication methods and their implications on the organization of materials are reviewed, as well as selected electrical devices. The approaches described here are opening up new avenues for the fabrication of health or structural monitoring devices, autonomous machines, and interconnected objects.

show abstract

Shear induced alignment of short nanofibers in 3D printed polymer composites

Cited by 67 publications

References 43 publications

Electrical and mechanical tuning of 3D printed photopolymer–MWCNT nanocomposites through in situ dispersion

Electrical and mechanical tuning of 3D printed photopolymer–MWCNT nanocomposites through in situ dispersion

Short fiber reinforced 3d printed ceramic composite with shear induced alignment

3D Assembly of Graphene Nanomaterials for Advanced Electronics

Contact Info

Product

Resources

About