Bio-inspired high-strength supramolecular fiber membrane by ice-dissolving-regeneration for achieving self-healing, self-cleaning and water purification

Xia, Mengsheng; Gao, Junkai; Xu, Pengtao; Fang, Jingkang; Yang, Qian; He, Qian; Chen, Yan

doi:10.1016/j.cej.2024.150023

Cited by 2 publications

(1 citation statement)

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“…As shown in Figure e, the A-KFs membrane showed a membrane flux of 186.7 L m –2 h –1 and separation efficiency of 98.8%, because the hydrophobic components such as lignin, hemicellulose and wax of kapok fibers were removed after NaClO 2 treatment, and a hydration layer could be formed on the surface of A-KFs membrane. As for the R-KFs membrane, it displayed a higher membrane flux (840.3 L m –2 h –1 ) and separation efficiency (99.5%) than that of A-KFs membrane, which was attributed to the remarkable wettability and rough structures on the surface of R-KFs. , …”

Section: Resultsmentioning

confidence: 99%

Green Recovery of Kapok by Partial Dissolution Regeneration for Constructing High-Strength Fiber Membrane to Achieve Oily Wastewater Purification

Cao,

Xia,

Gao

et al. 2024

ACS Sustainable Chem. Eng.

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Recently, the recovery and reuse of natural fibers have gained much attention. However, kapok fiber as a kind of natural cellulose fiber is difficult to recycle because of its poor mechanical property. In this study, a facile, universal, and brand new strategy was proposed by taking the partial dissolution and self-assembled regeneration of cellulose for fabricating regenerated kapok fibers (R-KFs). The R-KFs exhibit compact fiber structure, and the structural densification obtained in the cellulose dissolution and selfassembled regeneration process make the fibers possess high strength. Then, the tensile strength of R-KFs is enhanced 37 times compared to the original kapok fibers, which can efficiently break through the limitation of weak mechanical property of kapok fibers for constructing functional material to broaden its application in other fields. Furthermore, the regenerated kapok cellulose fibers achieve strong hydrogen bonding networks and unique multilayer structures so as to exhibit the remarkable properties of superhydrophilicity and stability. Thus, under gravity-driven filtration, the asprepared R-KFs showed excellent purification efficiency of 99.9% for oily wastewater, and furthermore, the R-KFs achieved superior flux (3.8 × 10 4 L m −2 h −1 ) and favorable reusability (30 cycles). It is the first time to achieve the regeneration and recycling of waste kapok fibers, and moreover, such a green, simple, and highly efficient strategy developed in this study for the recovery and reapplication of kapok fibers can be extended to recycle and reuse other natural fibers and cellulose materials similar to kapok fibers.

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Section: Resultsmentioning

confidence: 99%