An ultralight aerogel-type urea absorbent for the development of a wearable artificial kidney

Yuan, Yaping; Li, Jing; Guo, Chenyuan; Zhang, Lili; Song, Yuyan; He, Yong; Luo, Yankun; Shen, Suhung

doi:10.1039/d3nj00432e

Cited by 4 publications

(2 citation statements)

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“…However, these solvents come with their respective challenges, such as high costs, the need for toxic constituents, and solvent recovery complexities. In response, a novel cellulose solvent, an aqueous NaOH/urea solution, has been devised for utilization in low‐temperature systems, aiming to craft diverse functional materials 19–21 . This solvent aids in the dissolution of cellulose at sub‐optimal temperatures through the swift dynamic self‐assembly of NaOH and urea amidst cellulose molecules.…”

Section: Introductionmentioning

confidence: 99%

“…In response, a novel cellulose solvent, an aqueous NaOH/ urea solution, has been devised for utilization in lowtemperature systems, aiming to craft diverse functional materials. [19][20][21] This solvent aids in the dissolution of cellulose at sub-optimal temperatures through the swift dynamic self-assembly of NaOH and urea amidst cellulose molecules. It is worth noting that preserving the gel state of cellulose is viable solely at reduced temperatures; exceeding the dissolution threshold disrupts the condensate stability, causing the cellulose to re-entangle, a phenomenon pivotal to wet gel formation.…”

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confidence: 99%

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Lightweight hydrophobic cellulose foam material with low density and high porosity applications in Cu (II) adsorption

Wu,

Wang,

Wang

et al. 2023

J of Applied Polymer Sci

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Cellulose foam, renowned for its lightweight properties and exceptional adsorption capacity, has emerged as a significant material of interest. In our study, a distinct functionalized cellulose foam adsorbent was developed using N,N‐methylenebisacrylamide (MBA) as a cross‐linker. This foam was further chemically tailored with 3‐aminopropyltriethoxysilane (APTES) and tannic acid (TA) to optimize its affinity for Cu (II). Utilizing a green and efficient procedure at ambient temperature, MBA was directly crosslinked with MCC sol, the resultant foam features a distinguished three‐dimensional, multi‐walled porous configuration, marked by a strikingly low average density of 0.0306 g/cm3 and an impressive average porosity surpassing 97%. Subsequently, more amino and oxygen‐containing groups were introduced by simple impregnation. The rich functional groups and unique structure enabled the adsorption of Cu (II) up to 93 mg/g, demonstrating an increasing trend in line with rising Cu (II) concentrations. Furthermore, this composite cellulose foam displayed commendable hydrophobic characteristics, evident from a hydrophobic angle surpassing 120°. From both environmental and economic perspectives, this chemically‐modified cellulose material epitomizes an ideal adsorbent, showcasing unparalleled adsorption capacity coupled with robust chemical and structural integrity. As such, it presents a viable option for the efficient sequestration of Cu (II) in wastewater treatments.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%