Highly stretchable hydrogels for UV curing based high-resolution multimaterial 3D printing

Zhang, Biao; Li, Shiya; Hingorani, Hardik; Serjouei, Ahmad; Larush, Liraz; Pawar, Amol Ashok; Goh, Wei Huang; Sakhaei, Amir Hosein; Hashimoto, Michinao; Kowsari, Kavin; Magdassi, Shlomo; Ge, Qi

doi:10.1039/c8tb00673c

Cited by 210 publications

(158 citation statements)

References 64 publications

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“…For hydrogels, several printing methods have been developed in the past several years, such as Digital Light Process, [23,24] Two-photon Microfabrication, [25] and Direct Ink Writing (DIW). Printing methods and printable materials are major impediments to unleash the vast potential of 3D printing.…”

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confidence: 99%

3D Printing of Multifunctional Hydrogels

Chen

Zhao

Liu

et al. 2019

Adv Funct Materials

276

192

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3D printing technology has been widely explored for the rapid design and fabrication of hydrogels, as required by complicated soft structures and devices. Here, a new 3D printing method is presented based on the rheology modifier of Carbomer for direct ink writing of various functional hydrogels. Carbomer is shown to be highly efficient in providing ideal rheological behaviors for multifunctional hydrogel inks, including double network hydrogels, magnetic hydrogels, temperature-sensitive hydrogels, and biogels, with a low dosage (at least 0.5% w/v) recorded. Besides the excellent printing performance, mechanical behaviors, and biocompatibility, the 3D printed multifunctional hydrogels enable various soft devices, including loadable webs, soft robots, 4D printed leaves, and hydrogel Petri dishes. Moreover, with its unprecedented capability, the Carbomer-based 3D printing method opens new avenues for bioprinting manufacturing and integrated hydrogel devices.

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confidence: 99%

3D Printing of Multifunctional Hydrogels

Chen

Zhao

Liu

et al. 2019

Adv Funct Materials

276

192

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“…Then, we coated a thin conductive hydrogel layer by immersing the lattice structure into a conductive hydrogel solution which was prepared by mixing acrylamide as the monomer, poly (ethylene glycol) diacrylate (PEGDA) as the crosslinker, and 2,4,6trimethylbenzoyldiphenylphosphine oxide as the photoinitiator into 80 wt. % water [33]. A small amount of sodium chloride was added to make the hydrogel solution conductive.…”

Section: Demonstration Of Passive 4d Printingmentioning

confidence: 99%

Modified commercial UV curable elastomers for passive 4D printing

Hingorani

Zhang

Serjouei

et al. 2019

International Journal of Smart and Nano Materials

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Conventional 4D printing technologies are realized by combining 3D printing with soft active materials such as shape memory polymers (SMPs) and hydrogels. However, the intrinsic material property limitations make the SMP or hydrogel-based 4D printing unsuitable to fabricate the actuators that need to exhibit fast-response, reversible actuations. Instead, pneumatic actuations have been widely adopted by the soft robotics community to achieve fast-response, reversible actuations, and many efforts have been made to apply the pneumatic actuation to 3D printed structures to realize passive 4D printing with fast-response, reversible actuation. However, the 3D printing of soft actuators/robots heavily relies on the commercially available UV curable elastomers the break strains of which are not sufficient for certain applications which require larger elastic deformation. In this paper, we present two simple approaches to tune the mechanical properties such as stretchability, stiffness, and durability of the commercially available UV curable elastomers by adding: (i) mono-acrylate based linear chain builder; (ii) urethane diacrylate-based crosslinker. Material property characterizations have been performed to investigate the effects of adding the two additives on the stretchability, stiffness, mechanical repeatability as well as viscosity. Demonstrations of fully printed robotic finger, grippers, and highly deformable 3D lattice structure are also presented.

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“…The applications of traditional hydrogels are often severely limited by their low mechanical [1][2][3][4]. Fortunately, With the deepening of research, highly stretchable hydrogels [5], conductive hydrogels [6], 3D printable hydrogels [7] and self-healing hydrogels [8] are emerging continuously. Specifically, with the growing demand of biomaterials and wearable equipment, electrically conductive hydrogels (CHs) with electrical conductivity and flexible mechanical properties have attracted great interest [9].…”

Section: Introductionmentioning

confidence: 99%

Tough and conductive polymer hydrogel based on double network for photo-curing 3D printing

Ding

Jia

Gan

et al. 2020

Mater. Res. Express

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Conductive hydrogels (CHs) have attracted significant attention in wearable equipment and soft sensors due to their high flexibility and conductivity. However, CHs with high-strength and freestructure still need to be further explored. Herein, 3D printing high-strength conductive polymer hydrogels (CPHs) based on a double network was prepared. Firstly, PHEA-PSS hydrogels were prepared by copolymerizing 2-Hydroxyethyl acrylate (HEA) with 4-Vinylbenzenesulfonic acid (SSS) using a photo-curing 3D printer. Then 3, 4-Ethylenedioxythiophene (EDOT) was in situ polymerized in the network of PHEA-PSS to obtain the PHEA-PSS/PEDOT hydrogels. It can not only satisfy the printing of complex spatial structures, but also has high mechanical and electrical properties. When the content of EDOT is 12 wt%, the tensile strength of the PHEA-PSS/PEDOT hydrogels is close to 8 MPa, the electrical conductivity reach to 1.2 S cm −1 and the elasticity remain unchanged. Due to the presence of hydrogen and coordination bonds, CPHs have certain self-heal ability. In addition, the resistance of the hydrogel is sensitive to the changes of external pressure. The results show that CPHs can be used as a 3D printing material for flexible sensors.

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Highly stretchable hydrogels for UV curing based high-resolution multimaterial 3D printing

Abstract: We report a highly stretchable hydrogel system that is suitable for digital light processing (DLP) based high-resolution multimaterial 3D printing.

Cited by 210 publications

References 64 publications

3D Printing of Multifunctional Hydrogels

3D Printing of Multifunctional Hydrogels

Modified commercial UV curable elastomers for passive 4D printing

Tough and conductive polymer hydrogel based on double network for photo-curing 3D printing

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