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Bio-Design and Manufacturing  2021 Vol.4 No.4 P.867-878

http://doi.org/10.1007/s42242-021-00151-6


4D printing of PLA/PCL shape memory composites with controllable sequential deformation


Author(s):  Suqian Ma, Zeyu Jiang, Meng Wang, Lan Zhang, Yunhong Liang, Zhihui Zhang, Lei Ren, Luquan Ren

Affiliation(s):  The Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China; more

Corresponding email(s):   liangyunhong@jlu.edu.cn

Key Words:  4D printing, Shape memory polymer, Temperature-responsive, Polylactic acid, Polycaprolactone


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Suqian Ma, Zeyu Jiang, Meng Wang, Lan Zhang, Yunhong Liang, Zhihui Zhang, Lei Ren, Luquan Ren. 4D printing of PLA/PCL shape memory composites with controllable sequential deformation[J]. Journal of Zhejiang University Science D, 2021, 4(4): 867-878.

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author="Suqian Ma, Zeyu Jiang, Meng Wang, Lan Zhang, Yunhong Liang, Zhihui Zhang, Lei Ren, Luquan Ren",
journal="Journal of Zhejiang University Science D",
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pages="867-878",
year="2021",
publisher="Zhejiang University Press & Springer",
doi="10.1007/s42242-021-00151-6"
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A1 - Zhihui Zhang
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DOI - 10.1007/s42242-021-00151-6


Abstract: 
shape memory polymers (SMPs) are a promising class of materials for biomedical applications due to their favorable mechanical properties, fast response, and good biocompatibility. However, it is difcult to achieve controllable sequential shape change for most SMPs due to their high deformation temperature and the simplex deformation process. Herein, shape memory composites based on polylactic acid (PLA) matrix and semi-crystalline linear polymer polycaprolactone (PCL) are fabricated using 4D printing technology. Compared with pure PLA, with the rise of PCL content, the 4D-printed PLA/ PCL composites show decreased glass transition temperature (Tg) from 67.2 to 55.2 °C. Through the precise control of the deformation condition, controllable sequential deformation with an outstanding shape memory efect can be achieved for the PLA/PCL shape memory composites. The response time of shape recovery is less than 1.2 s, and the shape fxation/recov-ery rates are above 92%. In order to simulate sequential petal opening and sequential drug releasing efects, a double-layer bionic fower and a drug release device, respectively, are presented by assembling PLA/PCL samples with diferent PLA/ PCL ratios. The results indicate the potential applications of 4D-printed PLA/PCL composites in the feld of bio-inspired robotics and biomedical devices.

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