A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Development of a nature-inspired polymeric fiber (BioFiber) for advanced delivery of self-healing agents into concrete
https://orcid.org/0009-0006-3942-7425
https://orcid.org/0000-0002-6917-9163
https://orcid.org/0000-0001-5432-9440
https://orcid.org/0000-0002-0865-2156
Highlights BioFiber were developed using core-fiber, endospore-laden hydrogel, and protective shell. Polyester and polyvinyl alcohol fibers were used as core-fiber, and alginate as bio-agent carrier. Endospore Lysinibacillus sphaericus strain MB284 was used as self-healing agent. A blend of polystyrene and polylactic acid was selected as protective shell layer. BioFiber showed satisfactory results for further incorporation in quasi-brittle matrix.
Abstract In this study, we developed nature-inspired multi-functional polymeric fibers (called BioFiber) to deliver bio-self-healing agents into cementitious materials. BioFibers were manufactured using a load-bearing core-fiber, a sheath of endospore-laden hydrogel, and an outer damage-responsive polymeric shell layer. The innovative BioFiber integrates three key functionalities into the quasi-brittle matrix: (i) autonomous bio-self-healing, (ii) crack growth control, and (iii) damage-responsiveness. The hydrogel sheath contained endospores, as bio-agents, to establish microbially-induced calcium carbonate precipitation (MICCP) as a self-healing end-product. The core-fibers provided crack growth control functionality into quasi-brittle engineering materials. Additionally, the outer shell coating integrated a robust damage-responsive self-healing activation strategy in concrete. A comprehensive parametric study was conducted to explore material options and the influential parameters for tailoring the processing-compositions-structure properties of the developed BioFiber. The findings of this study revealed that a concentration of 8 w/v sodium-alginate crosslinked with calcium acetate provided higher solution uptake capacity required for MICCP. As for the shell, the polymer blend of polystyrene and polylactic acid (1:1 wt%), with polymer/solvent ratio of 18 w/v-single layer coating, effectively protected BioFibers during simulated concrete casting process. Lastly, each BioFiber was able to produce 40–80 mg of calcium carbonate within the first 30 h of activation.
Development of a nature-inspired polymeric fiber (BioFiber) for advanced delivery of self-healing agents into concrete
https://orcid.org/0009-0006-3942-7425
https://orcid.org/0000-0002-6917-9163
https://orcid.org/0000-0001-5432-9440
https://orcid.org/0000-0002-0865-2156
Highlights BioFiber were developed using core-fiber, endospore-laden hydrogel, and protective shell. Polyester and polyvinyl alcohol fibers were used as core-fiber, and alginate as bio-agent carrier. Endospore Lysinibacillus sphaericus strain MB284 was used as self-healing agent. A blend of polystyrene and polylactic acid was selected as protective shell layer. BioFiber showed satisfactory results for further incorporation in quasi-brittle matrix.
Abstract In this study, we developed nature-inspired multi-functional polymeric fibers (called BioFiber) to deliver bio-self-healing agents into cementitious materials. BioFibers were manufactured using a load-bearing core-fiber, a sheath of endospore-laden hydrogel, and an outer damage-responsive polymeric shell layer. The innovative BioFiber integrates three key functionalities into the quasi-brittle matrix: (i) autonomous bio-self-healing, (ii) crack growth control, and (iii) damage-responsiveness. The hydrogel sheath contained endospores, as bio-agents, to establish microbially-induced calcium carbonate precipitation (MICCP) as a self-healing end-product. The core-fibers provided crack growth control functionality into quasi-brittle engineering materials. Additionally, the outer shell coating integrated a robust damage-responsive self-healing activation strategy in concrete. A comprehensive parametric study was conducted to explore material options and the influential parameters for tailoring the processing-compositions-structure properties of the developed BioFiber. The findings of this study revealed that a concentration of 8 w/v sodium-alginate crosslinked with calcium acetate provided higher solution uptake capacity required for MICCP. As for the shell, the polymer blend of polystyrene and polylactic acid (1:1 wt%), with polymer/solvent ratio of 18 w/v-single layer coating, effectively protected BioFibers during simulated concrete casting process. Lastly, each BioFiber was able to produce 40–80 mg of calcium carbonate within the first 30 h of activation.
Development of a nature-inspired polymeric fiber (BioFiber) for advanced delivery of self-healing agents into concrete
https://orcid.org/0009-0006-3942-7425
https://orcid.org/0000-0002-6917-9163
https://orcid.org/0000-0001-5432-9440
https://orcid.org/0000-0002-0865-2156
Highlights BioFiber were developed using core-fiber, endospore-laden hydrogel, and protective shell. Polyester and polyvinyl alcohol fibers were used as core-fiber, and alginate as bio-agent carrier. Endospore Lysinibacillus sphaericus strain MB284 was used as self-healing agent. A blend of polystyrene and polylactic acid was selected as protective shell layer. BioFiber showed satisfactory results for further incorporation in quasi-brittle matrix.
Abstract In this study, we developed nature-inspired multi-functional polymeric fibers (called BioFiber) to deliver bio-self-healing agents into cementitious materials. BioFibers were manufactured using a load-bearing core-fiber, a sheath of endospore-laden hydrogel, and an outer damage-responsive polymeric shell layer. The innovative BioFiber integrates three key functionalities into the quasi-brittle matrix: (i) autonomous bio-self-healing, (ii) crack growth control, and (iii) damage-responsiveness. The hydrogel sheath contained endospores, as bio-agents, to establish microbially-induced calcium carbonate precipitation (MICCP) as a self-healing end-product. The core-fibers provided crack growth control functionality into quasi-brittle engineering materials. Additionally, the outer shell coating integrated a robust damage-responsive self-healing activation strategy in concrete. A comprehensive parametric study was conducted to explore material options and the influential parameters for tailoring the processing-compositions-structure properties of the developed BioFiber. The findings of this study revealed that a concentration of 8 w/v sodium-alginate crosslinked with calcium acetate provided higher solution uptake capacity required for MICCP. As for the shell, the polymer blend of polystyrene and polylactic acid (1:1 wt%), with polymer/solvent ratio of 18 w/v-single layer coating, effectively protected BioFibers during simulated concrete casting process. Lastly, each BioFiber was able to produce 40–80 mg of calcium carbonate within the first 30 h of activation.
Development of a nature-inspired polymeric fiber (BioFiber) for advanced delivery of self-healing agents into concrete
Houshmand Khaneghahi, Mohammad (author) / Kamireddi, Divya (author) / Rahmaninezhad, Seyed Ali (author) / Sadighi, Amirreza (author) / Schauer, Caroline L. (author) / Sales, Christopher M. (author) / Najafi, Ahmad R. (author) / Cotton, Aidan (author) / Street, Reva (author) / Farnam, Yaghoob (Amir) (author)
2023-10-09
Article (Journal)
Electronic Resource
English
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