Banca de QUALIFICAÇÃO: BEATRIZ SAKAMOTO ARSUFFI

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : BEATRIZ SAKAMOTO ARSUFFI
DATE: 09/05/2023
TIME: 09:30
LOCAL: Remoto
TITLE:

Programmable cellulose nanocomposite for 4D printing of bioinspired robotic matter

PAGES: 80
BIG AREA: Outra
AREA: Tecnologia e Inovação
SUMMARY:

This interdisciplinary research combines materials science, bioinspired design, and additive manufacturing to develop programmable and printable nanocellulose-based composites with potential to shape-morphing in response to changes in humidity and temperature. In this project, thermoresponsive double-network hydrogel inks of poly(N-isopropylacrylamide) (PNIPAM) and sodium alginate, reinforced with cellulose nanocrystals (CNC) and nanofibers (CNF) are synthesised for the prototyping, via 3D/4D printing, of robotic matter bioinspired in plant movements. The incorporation of CNC and CNF increases the mechanical strength and stiffness of hydrogel matrices, optimizes the control of rheological properties, and enables the modelling of mechanical and structural characteristics, due to the anisotropic and hygroscopic nature of nanocellulose. Moreover, the alignment of the nanocelluloses during extrusion printing dictates the swelling direction of the hydrogels, allowing the control of shape transformations. This possibility to program the behaviour of the structures after the printing process opens doors for applications in 4D printing of actuators and autonomous soft robots. To date, most of the soft robots are dependent on pneumatic and electric forces, which limit their autonomy and range of applications. In this sense, this project aims to contribute to the innovative area of robotic matter, which comprehends the use of responsive materials and the design of adaptable structures, through the development of nanocomposites with embodied intelligence. Therefore, it is expected that the results obtained will expand the knowledge about the use of nanocellulose-based inks as robotic matter for a new generation of autonomous and sustainable soft robots.

COMMITTEE MEMBERS:
Presidente - Interno ao Programa - 2352043 - SILVIA LENYRA MEIRELLES CAMPOS TITOTTO
Membro Titular - Examinador(a) Externo à Instituição - HERNANE DA SILVA BARUD
Membro Titular - Examinador(a) Externo à Instituição - JULIANA DA SILVA BERNARDES - CNPEM
Membro Suplente - Examinador(a) Externo ao Programa - 2347767 - MATHILDE JULIENNE GISELE CHAMPEAU
Membro Suplente - Examinador(a) Externo à Instituição - ANA PAULA PIEDADE