The The Exchange of Radioactive Zinc between Cellulose and Sodium Hydroxide-Sodium Zincate Solutions.

Borgin, K.; Stamm, Alfred J.

doi:10.1021/j150480a004

Cited by 10 publications

(9 citation statements)

References 2 publications

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“…The mechanism of ZnO affecting the system is still an open question even though many suggestions have been reported. It is known that Zn is not bound to cellulose (Borgin & Stamm 1950). Yang et al (2011) suggested that the hydrogen bonding between cellulose molecules might be interrupted by ZnO, which would keep the chains far away from each other and thus decrease the possibility of network formation.…”

Section: Cellulose-naoh (Aq) Solutionsmentioning

confidence: 99%

Gelation of cellulose-NaOH solutions in the presence of cellulose fibers

Korhonen

Budtova

2019

Carbohydrate Polymers

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Section: Cellulose-naoh (Aq) Solutionsmentioning

confidence: 99%

Gelation of cellulose-NaOH solutions in the presence of cellulose fibers

Korhonen

Budtova

2019

Carbohydrate Polymers

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“…The question asked was if Zn or sodium zincate is chemically bound to cellulose or not. Using radioactive labelled Zn 65 and following its diffusion during cellulose coagulation, it was demonstrated that Zn is not bound to cellulose in any form(Borgin and Stamm 1950).…”

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confidence: 99%

Cellulose in NaOH–water based solvents: a review

2015

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International audienceThe article is a critical review of all aspects of the dissolution of cellulose in NaOH-based aqueous solutions: from the background properties of the solvent itself, to the mechanisms of cellulose fibre swelling and dissolution, solution structure and properties and influence of additives and, finally, to the properties of various materials (fibres, films, aerogels, composites and interpenetrated networks) prepared from these solutions. A historical evolution of the research on this topic is presented. The pros and cons of NaOH-based aqueous solvent for cellulose are summarised and some prospects are suggested

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“…Herein, we tried to further improve the fiber production efficiency by increasing the cellulose concentration and shortening the production cycle period and reduce the cost without defecting the fiber mechanical properties using the cheap solvents and coagulators. The cellulose solubility and solution stability can be enhanced by introducing 0.8 wt % ZnO . To induce the nanofiber formation in the cellulose fibers, a coagulator with large molecular weight is essential; thus, safe, abundant, and renewable coagulators, namely, citric acid (CA) and trisodium citrate (TC), , were explored to use here, which were as cheap as H 2 SO 4 /Na 2 SO 4 .…”

Section: Introductionmentioning

confidence: 99%

Green and Economical Strategy for Spinning Robust Cellulose Filaments

Xie

Ying

et al. 2020

ACS Sustainable Chem. Eng.

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A "green", low-cost, and efficient processing technology to spin regenerated cellulose multifilaments has attracted much attention in the textile field. Herein, robust cellulose filaments were produced from a cellulose solution in a NaOH/urea/ZnO aqueous system with a relatively high concentration (7.5 wt %) via the wet-spinning technique by coagulating in cheap and renewable 15 wt % citric acid/5 wt % trisodium citrate/40 wt % glycol at low temperature, followed by drawing in a 5% sulfuric acid bath. In our findings, the solubility and the solution stability were significantly improved by introducing 0.8 wt % ZnO, and the cellulose chains self-aggregated in parallel to form nanofibers through hydrogen bonding, as a result of the relatively slow exchange ratio between the coagulator and solvent. Moreover, the nanofibers with an average diameter of 30−50 nm were aligned to the fiber direction by stretching orientation in the second sulfuric acid coagulator, leading to the further enhancement of the filament strength. The nanofibril-structured cellulose fibers exhibited a high orientation degree of 0.85 and an excellent tensile strength of 2.92 cN dtex −1 . The wet-spinning process only took 8 h, and our production costs were as cheap as viscose, which was an efficient, low-cost, and "green" process without the discharge of toxic substances. Furthermore, the 80−160 nm ZnO nanoparticles could be generated into cellulose filaments for achieving ultraviolet and static resistance. This work provided a "green" and economical strategy for spinning robust cellulose filaments. Such a technology is being industrially trialed by cooperating with Yibin Grace Co. Ltd in China, showing potential impact on the sustainability in the industry, economy, and environment.

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The The Exchange of Radioactive Zinc between Cellulose and Sodium Hydroxide-Sodium Zincate Solutions.

Cited by 10 publications

References 2 publications

Gelation of cellulose-NaOH solutions in the presence of cellulose fibers

Gelation of cellulose-NaOH solutions in the presence of cellulose fibers

Cellulose in NaOH–water based solvents: a review

Green and Economical Strategy for Spinning Robust Cellulose Filaments

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