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自愈合混凝土中3D打印网络的发展

Development of 3D Printed Networks in Self-Healing Concrete.

作者信息

De Nardi Cristina, Gardner Diane, Jefferson Anthony Duncan

机构信息

Resilient Materials for Life (RM4L) Research Group, School of Engineering, Cardiff University, Wales CF243AA, UK.

出版信息

Materials (Basel). 2020 Mar 14;13(6):1328. doi: 10.3390/ma13061328.

DOI:10.3390/ma13061328
PMID:32183343
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7143803/
Abstract

This paper presents a new form of biomimetic cementitious material, which employs 3D-printed tetrahedral mini-vascular networks (MVNs) to store and deliver healing agents to damage sites within cementitious matrices. The MVNs are required to not only protect the healing agent for a sufficient period of time but also survive the mixing process, release the healing agent when the cementitious matrix is damaged, and have minimal impact on the physical and mechanical properties of the host cementitious matrix. A systematic study is described which fulfilled these design requirements and determined the most appropriate form and material for the MVNs. A subsequent series of experiments showed that MVNs filled with sodium silicate, embedded in concrete specimens, are able to respond effectively to damage, behave as a perfusable vascular system and thus act as healing agent reservoirs that are available for multiple damage-healing events. It was also proved that healing agents encapsulated within these MVNs can be transported to cracked zones in concrete elements under capillary driving action, and produce a recovery of strength, stiffness and fracture energy.

摘要

本文介绍了一种新型仿生胶凝材料，该材料采用3D打印的四面体微血管网络（MVN）来储存愈合剂并将其输送到胶凝材料基体中的损伤部位。MVN不仅需要在足够长的时间内保护愈合剂，还要在搅拌过程中存活下来，在胶凝材料基体受损时释放愈合剂，并且对主体胶凝材料基体的物理和力学性能影响最小。文中描述了一项满足这些设计要求并确定MVN最合适形式和材料的系统研究。随后的一系列实验表明，填充硅酸钠并嵌入混凝土试件中的MVN能够对损伤做出有效响应，表现为可灌注的血管系统，从而充当可用于多次损伤修复事件的愈合剂储存库。还证明了封装在这些MVN中的愈合剂可以在毛细驱动力作用下输送到混凝土构件的裂缝区域，并使强度、刚度和断裂能得到恢复。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fff9/7143803/0f281d49a59a/materials-13-01328-g015.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fff9/7143803/af4c37945930/materials-13-01328-g007.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fff9/7143803/3e15585f40d1/materials-13-01328-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fff9/7143803/cd008a476ab7/materials-13-01328-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fff9/7143803/0f281d49a59a/materials-13-01328-g015.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fff9/7143803/5bbc9bd4192e/materials-13-01328-g0A1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fff9/7143803/1e23ce15a608/materials-13-01328-g0A2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fff9/7143803/ede374d1441c/materials-13-01328-g0A3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fff9/7143803/e8382d9e7244/materials-13-01328-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fff9/7143803/bb5caa53fa42/materials-13-01328-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fff9/7143803/c6b6dafeb3c2/materials-13-01328-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fff9/7143803/e000756f763c/materials-13-01328-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fff9/7143803/ff0977115fad/materials-13-01328-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fff9/7143803/27ebaf6ca26c/materials-13-01328-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fff9/7143803/af4c37945930/materials-13-01328-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fff9/7143803/11adf6a37cf8/materials-13-01328-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fff9/7143803/6fec9917884a/materials-13-01328-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fff9/7143803/9a28606c61c1/materials-13-01328-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fff9/7143803/5e72d55b94d1/materials-13-01328-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fff9/7143803/f2bfaf9d718c/materials-13-01328-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fff9/7143803/3e15585f40d1/materials-13-01328-g013.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fff9/7143803/0f281d49a59a/materials-13-01328-g015.jpg

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本文引用的文献

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Self-Healing Capability of Fiber-Reinforced Cementitious Composites for Recovery of Watertightness and Mechanical Properties.纤维增强水泥基复合材料的自愈能力以恢复水密性和力学性能
Materials (Basel). 2014 Mar 13;7(3):2141-2154. doi: 10.3390/ma7032141.
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Setup of Extruded Cementitious Hollow Tubes as Containing/Releasing Devices in Self-Healing Systems.在自修复系统中设置挤压水泥空心管作为容纳/释放装置
Materials (Basel). 2015 Apr 21;8(4):1897-1923. doi: 10.3390/ma8041897.
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A Novel Design of Autonomously Healed Concrete: Towards a Vascular Healing Network.
聚合物材料作为各种应用的自修复剂的多功能性：综述
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