Development of bio-inspired multi-functional polymeric-based fibers (BioFiber) for advanced delivery of bacterial-based self-healing agent in concrete
Development of bio-inspired multi-functional polymeric-based fibers (BioFiber) for advanced delivery of bacterial-based self-healing agent in concrete
复制标题
开发仿生多功能聚合物纤维（BioFiber），用于在混凝土中先进地输送基于细菌的自修复剂
DOI：
10.1051/matecconf/202337802001
复制
发表时间：
2023
影响因子：
--
通讯作者：
Farnam, Yaghoob
中科院分区：
文献类型：
--
作者：
Khaneghahi, Mohammad Houshmand;Kamireddi, Divya;Rahmaninezhad, Seyed Ali;Schauer, Caroline L.;Sales, Christopher M.;Najafi, Ahmad;Cotton, Aidan;Sadighi, Amir;Farnam, Yaghoob
这项研究的目标是开发创新的基于细菌的损伤响应自愈纤维（以下称为生物纤维），这种纤维可以结合到混凝土中，同时具有两种功能：(1)裂缝桥接功能，以控制裂缝的生长；(2)裂缝发生时的裂缝愈合功能。生物纤维由承重核心纤维、充满细菌的水凝胶鞘和外部不渗透的应变响应外壳涂层组成。采用瞬间浸泡法制备多种含细菌、亲水性预聚物和交联试剂的储层，制备了生物纤维。以海藻酸钠为预聚物，在芯纤维上通过离子交联制备海藻酸钙水凝胶。将球形苍蝇芽孢杆菌的休眠菌（孢子）作为自愈剂掺入水凝胶中。然后，在水凝胶包覆的芯纤维上涂上一层不渗透聚合物涂层。采用聚苯乙烯和聚乳酸共混聚合物制备了不透水应变响应壳涂层材料。海藻酸钙的高溶胀能力为本研究中微生物诱导碳酸钙沉淀（MICP）化学途径即尿解提供了所需的水。应变响应抗渗涂层在混凝土浇筑过程中提供了足够的柔韧性，在开裂之前保护孢子和海藻酸盐，并在裂缝发生时提供足够的应力-应变行为，以激活MICP。为了评价生物纤维的性能，研究了水凝胶的膨胀能力、外壳涂层的不渗透性、孢子的浇注存活能力和MICP活性。
The goal of this research is to develop innovative damage-responsive bacterial-based self-healing fibers (hereafter called BioFiber) that can be incorporated into concrete to enable two functionalities simultaneously: (1) crack bridging functionality to control crack growth and (2) crack healing functionality when a crack occurs. The BioFiber is comprised of a load-bearing core fiber, a sheath of bacteria-laden hydrogel, and an outer impermeable strain-responsive shell coating. An instant soaking manufacturing process was used with multiple reservoirs containing bacteria-laden, hydrophilic prepolymer and crosslinking reagents to develop BioFiber. Sodium-alginate was used as a prepolymer to produce calcium-alginate hydrogel via ionic crosslinking on the core fiber. The dormant bacteria (spore) ofLysinibacillus sphaericuswas incorporated in hydrogel as a self-healing agent. Then, an impermeable polymeric coating was applied to the hydrogel-coated core fibers. The impermeable strain-responsive shell coating material was manufactured using the polymer blend of polystyrene and polylactic acid. The high swelling capacity of calcium-alginate provides the water required for the microbially induced calcium carbonate precipitation (MICP) chemical pathway, i.e., ureolysis in this study. The strain-responsive impermeable coating provides adequate flexibility during concrete casting to protect the spores and alginate before cracking and sufficient stress-strain behavior to grant damage-responsiveness upon crack occurrence to activate MICP. To evaluate the behavior of developed BioFiber, the swelling capacity of the hydrogel, the impermeability of shell coating, the spore casting survivability, and MICP activities were investigated.
影响因子：
7.4
作者：
Intarasoontron, Jirapa;Pungrasmi, Wiboonluk;Likitlersuang, Suched
通讯作者：
Likitlersuang, Suched
使用综合实验方法通过嵌入自愈胶囊来提高混凝土断裂韧性
影响因子：
7.4
作者：
E. Tsangouri;F. Gilabert;N. De Belie;D. Van Hemelrijck;Xingyi Zhu;D. Aggelis
通讯作者：
D. Aggelis