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Silica-rich regenerated cellulose fibers enabled by delayed dissolution of silica nanoparticles in strong alkali using zinc oxide
RISE Research Institutes of Sweden, Material och produktion, Kemi, biomaterial och textil.ORCID-id: 0000-0001-7178-5202
RISE Research Institutes of Sweden, Material och produktion, Kemi, biomaterial och textil.ORCID-id: 0000-0002-0125-063x
RISE Research Institutes of Sweden, Bioekonomi och hälsa, Material- och ytdesign.ORCID-id: 0000-0002-2624-5693
2021 (engelsk)Inngår i: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 264, artikkel-id 118032Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Silica nanoparticles (SNPs) dissolve in alkaline media, which limits their use in certain applications. Here, we report a delayed dissolution of SNPs in strong alkali induced by zinc oxide (ZnO), an additive which also limits gelation of alkaline cellulose solutions. This allows incorporating high solid content of silica (30 wt%) in cellulose solutions with retention of their predominant viscous behavior long enough (ca. 180 min) to enable fiber wet spinning. We show that without addition of ZnO, silica dissolves completely, resulting in strong gelation of cellulose solutions that become unsuitable for wet spinning. With an increase of silica concentration, gelation of the solutions occurs faster. Employing ZnO, silica-rich regenerated cellulose fibers were successfully spun, possessing uniform cross sections and smooth surface structure without defects. These findings are useful in advancing the development of functional man-made cellulose fibers with incorporated silica, e.g., fibers with flame retardant or self-cleaning properties. © 2021 The Author(s)

sted, utgiver, år, opplag, sider
Elsevier Ltd , 2021. Vol. 264, artikkel-id 118032
Emneord [en]
Cold alkali, Dissolution, Regenerated cellulose, Silica nanoparticles, Wet spinning, Zinc oxide, Gelation, II-VI semiconductors, Natural fibers, Spinning (fibers), Surface structure, Textile fibers, Alkaline cellulose, Alkaline media, Cellulose fiber, Cellulose solutions, High solid content, Viscous behaviors, Wet-spinning, Cellulose, Dissolving
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Identifikatorer
URN: urn:nbn:se:ri:diva-52959DOI: 10.1016/j.carbpol.2021.118032Scopus ID: 2-s2.0-85103953605OAI: oai:DiVA.org:ri-52959DiVA, id: diva2:1546869
Merknad

Funding details: Stiftelsen Åforsk, 19-523; Funding text 1: We are grateful to the ?Forsk Foundation for financial support to this study (grant number 19-523).; Funding text 2: We are grateful to the ÅForsk Foundation for financial support to this study (grant number 19-523 ).

Tilgjengelig fra: 2021-04-23 Laget: 2021-04-23 Sist oppdatert: 2023-06-02bibliografisk kontrollert

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Nechyporchuk, OleksandrHanna, UlmeforsTeleman, Anita

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