Self-Healing, Photothermal-Responsive, and Shape Memory Polyurethanes for Enhanced Mechanical Properties of 3D/4D Printed Objects

Jun Wang; Xiang Lin; Runguo WangYonglai LuLiqun Zhang

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Self-Healing, Photothermal-Responsive, and Shape Memory Polyurethanes for Enhanced Mechanical Properties of 3D/4D Printed Objects

机译：Self-Healing, Photothermal-Responsive, and Shape Memory Polyurethanes for Enhanced Mechanical Properties of 3D/4D Printed Objects

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Additive manufacturing is a promising technology that can directly fabricatestructures with complex internal geometries, which is barely achievedby traditional manufacturing. However, the mechanical properties of fuseddeposition modeling (FDM)-printed objects are inferior to those of conventionallymanufactured products. To improve the mechanical properties of theprinted products, a series of novel thermoplastic polyurethanes with selfhealingproperties, intrinsic photothermal effects, and excellent printabilityare designed and synthesized by introducing dynamic oxime–carbamatebonds and hydrogen bonds into the polymer chains. On-demand introductionof near-infrared (NIR) irradiation, direct heating, and sunlight irradiationenhances interfacial bonding strength and thus improve the mechanicalproperties of the printed product. Additionally, mechanical anisotropy of theprinted products can be sophistically manipulated by regulating the selfhealingconditions. Support-free printing and healing of damaged printedproducts are also achieved owing to the self-healing properties of the material.Moreover, the as-prepared materials exhibit shape-memory propertiesNIR irradiation or direct heating effectively triggers shape-memory recoveryand demonstrates their potential in 4D printing by printing a man-like robot.This study not only provides a facile strategy for obtaining high-performanceprinted products but also broadens the potential applications of FDM technologyin intelligent devices.

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来源
《Advanced functional materials》 |2023年第15期|2211579.1-2211579.14|共14页
作者
Jun Wang; Xiang Lin; Runguo WangYonglai LuLiqun Zhang;
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作者单位

Stake Key Laboratory of Organic-Inorganic CompositesBeijing University of Chemical TechnologyBeijing 100029, P. R. China;

School of Chemistry and Biological EngineeringUniversity of Science and Technology BeijingBeijing 100083, P. R. China;

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正文语种英语
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additive manufacturing; enhanced mechanical properties; near-infrared irradiation; self-healing properties; shape memory;

Self-Healing, Photothermal-Responsive, and Shape Memory Polyurethanes for Enhanced Mechanical Properties of 3D/4D Printed Objects

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