TY - JOUR
T1 - 4D Printing of Shape-Memory Hydrogels for Soft-Robotic Functions
AU - Shiblee, MD Nahin Islam
AU - Ahmed, Kumkum
AU - Kawakami, Masaru
AU - Furukawa, Hidemitsu
N1 - Funding Information:
M.N.I.S. and K.A. contributed equally to this work. This study has been partly supported by a Grant-in-Aid for Scientific Research (Category A, Project No. 17H01224, etc.) from the Japan Society for the Promotion of Science (JSPS), the Center Of Innovation (COI) program from the Japan Science and Technology Agency (JST), the Strategic Innovation Creation Project (SIP) from the New Energy and Industrial Technology Development Organization (NEDO) of Japan, and the Program on Open Innovation Platform with Enterprises, Research Institute and Academia (OPERA) from the JST. K.A. is supported by a JSPS fellowship for young scientists in the DC1 category. The authors acknowledge Prof. Tomoya Higashihara's support for the access to TGA, DSC, and DMA measurement techniques.
Publisher Copyright:
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/8
Y1 - 2019/8
N2 - Hydrogel actuators with soft-robotic functions and biomimetic advanced materials with facile and programmable fabrication processes remain scarce. A novel approach to fabricating a shape-memory-hydrogel-(SMG)-based bilayer system using 3D printing to yield a soft actuator responsive to the methodical application of swelling and heat is introduced. Each layer of the bilayer is composed of poly(N,N-dimethyl acrylamide-co-stearyl acrylate) (P(DMAAm-co-SA))-based hydrogels with different concentrations of the crystalline monomer SA within the SMG network and which exhibit distinctive physicochemical properties that enable anisotropic swelling-induced actuation of the bilayer with reversible shape-memory properties. The deformation, reversibility, and response time of the bilayer actuator are extensively dependent on temperature. Utilizing the proposed SMG bilayer actuator model with its synergistic functions, a nature-inspired flower architecture that changes its shape upon immersion in water and an underwater 3D macroscopic soft gripper that can grab, transport, and release a guest substance are developed to demonstrate the applicability of these hydrogels in biomimetic actuators, encapsulating systems, and soft robotics.
AB - Hydrogel actuators with soft-robotic functions and biomimetic advanced materials with facile and programmable fabrication processes remain scarce. A novel approach to fabricating a shape-memory-hydrogel-(SMG)-based bilayer system using 3D printing to yield a soft actuator responsive to the methodical application of swelling and heat is introduced. Each layer of the bilayer is composed of poly(N,N-dimethyl acrylamide-co-stearyl acrylate) (P(DMAAm-co-SA))-based hydrogels with different concentrations of the crystalline monomer SA within the SMG network and which exhibit distinctive physicochemical properties that enable anisotropic swelling-induced actuation of the bilayer with reversible shape-memory properties. The deformation, reversibility, and response time of the bilayer actuator are extensively dependent on temperature. Utilizing the proposed SMG bilayer actuator model with its synergistic functions, a nature-inspired flower architecture that changes its shape upon immersion in water and an underwater 3D macroscopic soft gripper that can grab, transport, and release a guest substance are developed to demonstrate the applicability of these hydrogels in biomimetic actuators, encapsulating systems, and soft robotics.
KW - 3D Printing
KW - 4D printing
KW - biomimetic actuators
KW - shape memory hydrogels
KW - soft robotics
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U2 - 10.1002/admt.201900071
DO - 10.1002/admt.201900071
M3 - Article
AN - SCOPUS:85066019064
VL - 4
JO - Advanced Materials Technologies
JF - Advanced Materials Technologies
SN - 2365-709X
IS - 8
M1 - 1900071
ER -