journal article·2017-04-05

3D-Printed Ultratough Hydrogel Structures with Titin-like Domains

Fengbo Zhu, Libo Cheng, Zhi Jian Wang, Wei Hong, Zi Liang Wu, Jun Yin, Jin Qian, Qiang Zheng

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Abstract

Titin is composed of repeated modular domains which unfold and dissipate energy upon loading. Here we employed such molecular-level paradigm to fabricate macroscopic ultratough hydrogel structures with titin-like domains, enabled by three-dimensional printing with multiple nozzles. Under stretch, the relatively thin and weak gel fibers in the printed structures break first and the hidden lengths postpone the failure of the main structures, mimicking the toughening principle in titin. These titin-like folded domains have been incorporated into a synthetic spider-web, which shows significantly enhanced extensibility and toughness. This work provides a new avenue of topological design for materials/structures with desired properties.
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Research context

OpenAlex topics: Advanced Materials and Mechanics · Supramolecular Self-Assembly in Materials · Silk-based biomaterials and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, China

The State Key Laboratory of Fluid Power Transmission and Control Systems, Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province, School of Mechanical Engineering, Zhejiang University, Hangzhou 310028, China

MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China

Department of Aerospace Engineering, Iowa State University, Ames, Iowa 50010, United States;

Global Station for Soft Matter, Global Institution for Collaborative Research and Education, Hokkaido University, Sapporo 060-0810, Japan

Funding

National Natural Science Foundation of China · Natural Science Foundation of Zhejiang Province

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