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4D Printing of a Sodium Alginate Hydrogel with Step-Wise Shape Deformation Based on Variation of Crosslinking Density AITranslate

Pengrui Cao; Liming Tao; Junhui Gong; Tingmei Wang; Qihua Wang; Junping Ju; Yaoming Zhang
University of Chinese Academy of Sciences; University of Chinese Academy of Sciences; University of Chinese Academy of Sciences; University of Chinese Academy of Sciences; University of Chinese Academy of Sciences; Qingdao University; University of Chinese Academy of Sciences
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Publisher: ACS
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Abstract AITranslate

Stimuli-responsive hydrogels with tailored mechanical performances and tunable responsiveness are highly demanded in many fields, including actuators, sensors, drug delivery systems, etc. Herein, we prepared a 4D printing methacrylated alginate (SA-MA) hydrogel, and the effect of the degree of methacrylation on 3D printability, crosslinking density, and responsiveness to Ca2+/chitosan crosslinking were systematically studied. The 4D-printed SA-MA hydrogels perform a step-wise volume contraction and mechanical enhancement when sequentially immersed in Ca2+ and chitosan solutions due to the crosslinking increase. Based on this, a bilayer of SA-MA hydrogel with different chemical crosslinking densities performed an anisotropic shape change by Ca2+ soaking. Furthermore, the 4D-printed SA-MA hydrogel with gradient crosslinking density shows multiple deformations by two-step ionic immersion. This controllable shape change provides a strategy for well-defined structure manufacturing.

KeyWords AITranslate

dual stimuliresponsive 4D printing sodium alginate hydrogels crosslinking density
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Basic Information:

DOI：https://doi.org/10.1021/acsapm.1c01034

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Citation Information:

Stimuli-responsive hydrogels with tailored mechanical performances and tunable responsiveness are highly demanded in many fields, including actuators, sensors, drug delivery systems, etc. Herein, we prepared a 4D printing methacrylated alginate (SA-MA) hydrogel, and the effect of the degree of methacrylation on 3D printability, crosslinking density, and responsiveness to Ca2+/chitosan crosslinking were systematically studied. The 4D-printed SA-MA hydrogels perform a step-wise volume contraction and mechanical enhancement when sequentially immersed in Ca2+ and chitosan solutions due to the crosslinking increase. Based on this, a bilayer of SA-MA hydrogel with different chemical crosslinking densities performed an anisotropic shape change by Ca2+ soaking. Furthermore, the 4D-printed SA-MA hydrogel with gradient crosslinking density shows multiple deformations by two-step ionic immersion. This controllable shape change provides a strategy for well-defined structure manufacturing.

quote

GB/T 7714-2015 [1] Pengrui Cao, Liming Tao, Junhui Gong, et al. ACS Applied Polymer Materials, 2021(3). DOI:10.1021/acsapm.1c01034.
MLA [1] Pengrui Cao, et al., ACS Applied Polymer Materials, no. 3, 2021, https://doi.org/10.1021/acsapm.1c01034.
APA [1] Pengrui Cao, Liming Tao, Junhui Gong, Tingmei Wang, Qihua Wang, Junping Ju, & Yaoming Zhang. (2021). ACS Applied Polymer Materials(3). https://doi.org/10.1021/acsapm.1c01034
IEEE [1] Pengrui Cao, Liming Tao, Junhui Gong, Tingmei Wang, Qihua Wang, Junping Ju, and Yaoming Zhang, ACS Applied Polymer Materials, no. 3, 2021, doi: 10.1021/acsapm.1c01034. keywords: {dual stimuliresponsive;4D printing;sodium alginate;hydrogels;crosslinking density}