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A platform for research: civil engineering, architecture and urbanism
Durable cement/cellulose nanofiber composites prepared by a facile approach
https://orcid.org/0000-0002-9350-9564
https://orcid.org/0000-0002-9793-3821
https://orcid.org/0000-0003-1620-6743
https://orcid.org/0000-0002-6676-7779
Abstract This study developed a facile methodology for preparation of nanoscale dispersion of cellulose nanofibers (CNFs). A suite of methodologies was proposed for the first time to gauge the dispersion quality of CNFs, which was crucial to the subsequent compounding with cement to prepare nanocomposites. Being compatible with cement through interfacial bonding between –COO- of CNFs and Ca2+ of cement, CNFs improved the compressive strength of cement by 18% at 0.096 wt% and flexural strength by 21% at 0.480 wt%. Reinforcing mechanisms were explained in terms of the hydration, pore structure and morphologies of the nanocomposites. CNFs at 0.096 wt% significantly decreased the pore volume of cement from 72.66 mm3/g to 51.39 mm3/g and reduced the cement water absorption from 17.23% to 10.60%, which was attributed to the enhanced microstructural densification and pore-size refinement.
Highlights The nanoscale dispersion of CNFs in water was achieved by using high-speed mixing. The dispersion quality of CNFs posed a significant effect on the structure and properties of the resulting nanocomposites. The reinforcing mechanisms were explained from perspectives of hydration and pore volumes. CNFs are promising green materials for development of strong and durable cement nanocomposites.
Durable cement/cellulose nanofiber composites prepared by a facile approach
https://orcid.org/0000-0002-9350-9564
https://orcid.org/0000-0002-9793-3821
https://orcid.org/0000-0003-1620-6743
https://orcid.org/0000-0002-6676-7779
Abstract This study developed a facile methodology for preparation of nanoscale dispersion of cellulose nanofibers (CNFs). A suite of methodologies was proposed for the first time to gauge the dispersion quality of CNFs, which was crucial to the subsequent compounding with cement to prepare nanocomposites. Being compatible with cement through interfacial bonding between –COO- of CNFs and Ca2+ of cement, CNFs improved the compressive strength of cement by 18% at 0.096 wt% and flexural strength by 21% at 0.480 wt%. Reinforcing mechanisms were explained in terms of the hydration, pore structure and morphologies of the nanocomposites. CNFs at 0.096 wt% significantly decreased the pore volume of cement from 72.66 mm3/g to 51.39 mm3/g and reduced the cement water absorption from 17.23% to 10.60%, which was attributed to the enhanced microstructural densification and pore-size refinement.
Highlights The nanoscale dispersion of CNFs in water was achieved by using high-speed mixing. The dispersion quality of CNFs posed a significant effect on the structure and properties of the resulting nanocomposites. The reinforcing mechanisms were explained from perspectives of hydration and pore volumes. CNFs are promising green materials for development of strong and durable cement nanocomposites.
Durable cement/cellulose nanofiber composites prepared by a facile approach
https://orcid.org/0000-0002-9350-9564
https://orcid.org/0000-0002-9793-3821
https://orcid.org/0000-0003-1620-6743
https://orcid.org/0000-0002-6676-7779
Abstract This study developed a facile methodology for preparation of nanoscale dispersion of cellulose nanofibers (CNFs). A suite of methodologies was proposed for the first time to gauge the dispersion quality of CNFs, which was crucial to the subsequent compounding with cement to prepare nanocomposites. Being compatible with cement through interfacial bonding between –COO- of CNFs and Ca2+ of cement, CNFs improved the compressive strength of cement by 18% at 0.096 wt% and flexural strength by 21% at 0.480 wt%. Reinforcing mechanisms were explained in terms of the hydration, pore structure and morphologies of the nanocomposites. CNFs at 0.096 wt% significantly decreased the pore volume of cement from 72.66 mm3/g to 51.39 mm3/g and reduced the cement water absorption from 17.23% to 10.60%, which was attributed to the enhanced microstructural densification and pore-size refinement.
Highlights The nanoscale dispersion of CNFs in water was achieved by using high-speed mixing. The dispersion quality of CNFs posed a significant effect on the structure and properties of the resulting nanocomposites. The reinforcing mechanisms were explained from perspectives of hydration and pore volumes. CNFs are promising green materials for development of strong and durable cement nanocomposites.
Durable cement/cellulose nanofiber composites prepared by a facile approach
Oh, Jeong-A (author) / Aakyiir, Mathias (author) / Liu, Yue (author) / Qiu, Aidong (author) / Meola, Tahlia R. (author) / Forson, Philip (author) / Araby, Sherif (author) / Zhuge, Yan (author) / Lee, Sang-Heon (author) / Ma, Jun (author)
2021-10-23
Article (Journal)
Electronic Resource
English
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