| Autor: |
Stachurski, Christopher D., Ma, Miaomiao, Larm, Nathaniel E., Gulbrandson, Anders J., Trulove, Paul C., Durkin, David P. |
| Zdroj: |
ACS Applied EngineeringMaterials; May 2024, Vol. 2 Issue: 5 p1360-1369, 10p |
| Abstrakt: |
Mesoporous cellulose can be generated by treating the biopolymer material with ionic liquid and then rinsing it with a nonpolar solvent gradient. However, upon re-exposure to plasticizing polar solvents, the mesoporous matrix readily collapses. In this study, mesoporous cotton was covalently modified with adipoyl dichloride to improve the resiliency of the cellulose mesoporous structure upon solvent re-exposure. The adipoyl-functionalized matrix retained surface areas ca. 150 m2g–1after rapid (<1 min) rinsing with a series of polar solvents (water–ethanol–acetone), a feat that could not be achieved with control samples. Furthermore, adipoyl-modified samples retained up to 10% of their surface area upon extended exposure to water, which could be reversed in part by reapplying the rapid, polar rinse series. In contrast, control samples underwent a catastrophic loss of surface area under the same conditions. By supporting the pore structure with “adipoyl rebar,” we present a viable, reproducible way to preserve the advantages of fiber-welded mesoporous cellulose, expanding its utility for a wide variety of subsequent applications. |
| Databáze: |
Supplemental Index |
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