Photoactivated Polymeric Bilayer Actuators Fabricated via 3D Printing

被引：71

作者：

Hagaman, Daniel E. ^{[1
]}

Leist, Steven ^{[2
]}

Zhou, Jack ^{[2
]}

Ji, Hai-Feng ^{[1
]}

机构：

[1] Drexel Univ, Dept Chem, 32 South 32nd St, Philadelphia, PA 19104 USA

[2] Drexel Univ, Dept Mech Engn & Mech, 3141 Chestnut St, Philadelphia, PA 19104 USA

来源：

ACS APPLIED MATERIALS & INTERFACES | 2018年 / 10卷 / 32期

基金：

美国国家科学基金会;

关键词：

3D printing; azobenzene; poly(siloxanes); smart materials; photoactivated; bilayer; PHASE-TRANSITIONS; AZOBENZENE; LIGHT; FILMS; PHOTOISOMERIZATION; ISOMERIZATION; SUBSTITUTION; NETWORKS;

D O I：

10.1021/acsami.8b08503

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

4D printing is an emerging additive manufacturing technology that combines the precision of 3D printing with the versatility of smart materials. 4D printed objects can change their shape over time with the application of a stimulus (i.e., heat, light, moisture). Light driven smart materials are attractive because light is wireless, remote, and can induce a rapid shape change. Herein, we present a method for fabricating polymeric bilayer actuators via 3D printing which reversibly change their shape upon exposure to light. The photoactive layer consists of a poly(siloxane) containing pendant azobenzene groups. Two different photoactive polymers were synthesized, and the photomechanical effect displayed by the bilayers was evaluated. These bilayers exhibit rapid actuation with full cycles completed within seconds, and photo generated stresses ranging from 1.03 to 1.70 MPa.

引用

页码：27308 / 27315

页数：8

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