Repositorio
Institucional

Palza, Humberto

Barraza, Belen

Olate-Moya, Felipe

Montecinos, Gino

Ortega, Jaime H.

Rosenkranz, Andreas

Tamburrino, Aldo

Superhydrophobic SLA 3D printed materials modified with nanoparticles biomimicking the hierarchical structure of a rice leaf

TAYLOR & FRANCIS LTD

SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS

en

The rice leaf, combining the surface properties of lotus leaves and shark skin, presents outstanding superhydrophobic properties motivating its biomimesis. We created a novel biomimetic rice-leaf superhydrophobic surface by a three-level hierarchical structure, using for a first time stereolithographic (SLA) 3D printed channels (100 mu m width) with an intrinsic roughness from the printing filaments (10 mu m), and coated with TiO2 nanoparticles (22 and 100nm). This structure presents a maximum advancing contact angle of 165 degrees characterized by lower both anisotropy and hysteresis contact angles than other 3D printed surfaces, due to the presence of air pockets at the surface/water interface (Cassie-Baxter state). Dynamic water-drop tests show that the biomimetic surface presents self-cleaning, which is reduced under UV-A irradiation. The biomimetic surface further renders an increased floatability to 3D printed objects meaning a drag-reduction due to reduced water/solid contact area. Numerical simulations of a channel with a biomimetic wall confirm that the presence of air is essential to understand our results since it increases the average velocity and decreases the friction factor due to the presence of a wall-slip velocity. Our findings show that SLA 3D printing is an appropriate approach to develop biomimetic superhydrophobic surfaces for future applications in anti-fouling and drag-reduction devices.

artículo original

This work was supported by [ANID -Millennium Science Initiative Program], under Grant [NCN17_092], [ANID], under Grant [21171013], [ANID], under Grant [AFB180004] [FONDEQUIP], under Grant [EQM150101], [FONDECYT], under Grant [1191179], [FONDECYT], under Grant [11180121], [CMM-Basal], under Grant [PIA AFB-17000], [FONDECYT], under Grant [1201125], Center of Mathematical Modeling Universidad de Chile [PIA AFB-17000]

Este trabajo fue apoyado por [ANID -Programa de Iniciativa Científica del Milenio], bajo Subvención [NCN17_092], [ANID], bajo subvención [21171013], [ANID], bajo Subvención [AFB180004] [FONDEQUIP], bajo subvención [EQM150101], [FONDECYT], bajo Grant [1191179], [FONDECYT], bajo subvención [11180121], [CMM-Basal], bajo subvención [PIA AFB-17000], [FONDECYT], bajo Subvención [1201125], Centro de Modelamiento Matemático Universidad de Chile [PIA AFB-17000]

10.1080/14686996.2022.2063035

PDF

3D printing

biomimetic

hierarchical structure

rice leaf

superhydrophobic

DRAG-REDUCTION

TITANIUM-DIOXIDE

SURFACES

FABRICATION

WETTABILITY

SLIP

RIBLETS

FILMS

ANGLE

AIR

Ciencia de Materiales

Multidisciplinar

Impresión 3D

biomimética

estructura jerárquica

hoja de arroz

superhidrófoba

REDUCCIÓN DE ARRASTRE

DIÓXIDO DE TITANIO

SUPERFICIES

FABRICACIÓN

MOJABILIDAD

DESLIZAMIENTO

RIBLETAS

PELÍCULAS

ÁNGULO

AIRE

Superhydrophobic SLA 3D printed materials modified with nanoparticles biomimicking the hierarchical structure of a rice leaf

300

321

artículo original

version publicada

CC BY 4.0

CC BY 4.0

acceso abierto

acceso abierto

ANID 21171013

ANID AFB180004

ANID NCN17_092

ANID-FONDEQUIP EQM150101

ANID

ANID-FONDECYT 11180121

ANID-FONDECYT 1191179

ANID-FONDECYT 1201125

ANID FONDEQUIP EQM150101

ANID FONDECYT 11180121

ANID FONDECYT 1191179

ANID FONDECYT 1201125

WOS:000791618000001