Photosynthesis-assisted remodeling of three-dimensional printed structures
Photosynthesis-assisted remodeling of three-dimensional printed structures
复制标题
光合作用辅助重塑三维打印结构
DOI：
10.1073/pnas.2016524118
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Daraio, Chiara
中科院分区：
文献类型：
--
作者：
Yu, Kunhao;Feng, Zhangzhengrong;Du, Haixu;Xin, An;Lee, Kyung Hoon;Li, Ketian;Su, Yipin;Wang, Qiming;Fang, Nicholas X.;Daraio, Chiara
工程结构在使用过程中，由于材料的疲劳或劣化，其力学性能不断衰减。相比之下，生物体能够通过再生其结构的一部分来加强其机械性能。例如，植物通过将光合作用产生的葡萄糖转化为坚硬的多糖来强化细胞结构。在这项工作中，我们实现了利用嵌入叶绿体的光合作用来重塑其微观结构的混合材料。这些材料可用于三维（3D）打印功能结构，当暴露于白色光时，这些功能结构被赋予基质强化和裂纹愈合。该机制依赖于3D可打印的聚合物，该聚合物允许与材料本体或界面上的光合作用产生的葡萄糖进行额外的交联反应。重塑行为可以暂停冷冻叶绿体，调节机械预加载，并逆转环境线索。这项工作为混合合成-活性材料的设计打开了大门，适用于智能复合材料，轻质结构和软机器人等应用。
The mechanical properties of engineering structures continuously weaken during service life because of material fatigue or degradation. By contrast, living organisms are able to strengthen their mechanical properties by regenerating parts of their structures. For example, plants strengthen their cell structures by transforming photosynthesis-produced glucose into stiff polysaccharides. In this work, we realize hybrid materials that use photosynthesis of embedded chloroplasts to remodel their microstructures. These materials can be used to three-dimensionally (3D)-print functional structures, which are endowed with matrix-strengthening and crack healing when exposed to white light. The mechanism relies on a 3D-printable polymer that allows for an additional cross-linking reaction with photosynthesis-produced glucose in the material bulk or on the interface. The remodeling behavior can be suspended by freezing chloroplasts, regulated by mechanical preloads, and reversed by environmental cues. This work opens the door for the design of hybrid synthetic-living materials, for applications such as smart composites, lightweight structures, and soft robotics.
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5.3
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影响因子：
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作者：
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