PMID- 33910742
OWN - NLM
STAT- MEDLINE
DCOM- 20210928
LR  - 20210928
IS  - 1879-1344 (Electronic)
IS  - 0144-8617 (Linking)
VI  - 264
DP  - 2021 Jul 15
TI  - Silica-rich regenerated cellulose fibers enabled by delayed dissolution of silica 
      nanoparticles in strong alkali using zinc oxide.
PG  - 118032
LID - S0144-8617(21)00419-7 [pii]
LID - 10.1016/j.carbpol.2021.118032 [doi]
AB  - 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.
CI  - Copyright (c) 2021 The Author(s). Published by Elsevier Ltd.. All rights reserved.
FAU - Nechyporchuk, Oleksandr
AU  - Nechyporchuk O
AD  - RISE Research Institutes of Sweden, P.O. Box 104, SE-431 22, Molndal, Sweden. 
      Electronic address: oleksandr.nechyporchuk@ri.se.
FAU - Ulmefors, Hanna
AU  - Ulmefors H
AD  - RISE Research Institutes of Sweden, P.O. Box 104, SE-431 22, Molndal, Sweden.
FAU - Teleman, Anita
AU  - Teleman A
AD  - RISE Research Institutes of Sweden, P.O. Box 5604, SE-114 86, Stockholm, Sweden.
LA  - eng
PT  - Journal Article
DEP - 20210403
PL  - England
TA  - Carbohydr Polym
JT  - Carbohydrate polymers
JID - 8307156
RN  - 0 (Alkalies)
RN  - 0 (Colloids)
RN  - 7631-86-9 (Silicon Dioxide)
RN  - 9004-34-6 (Cellulose)
RN  - SOI2LOH54Z (Zinc Oxide)
SB  - IM
MH  - Alkalies/*chemistry
MH  - Cellulose/*chemistry
MH  - Colloids/chemistry
MH  - Microscopy, Electron, Scanning/methods
MH  - Nanoparticles/*chemistry
MH  - Silicon Dioxide/*chemistry
MH  - Solubility
MH  - Spectrometry, X-Ray Emission/methods
MH  - Tensile Strength
MH  - Thermogravimetry/methods
MH  - Viscosity
MH  - Zinc Oxide/*chemistry
OTO - NOTNLM
OT  - Cold alkali
OT  - Dissolution
OT  - Regenerated cellulose
OT  - Silica nanoparticles
OT  - Wet spinning
OT  - Zinc oxide
EDAT- 2021/04/30 06:00
MHDA- 2021/09/29 06:00
CRDT- 2021/04/29 05:40
PHST- 2020/10/08 00:00 [received]
PHST- 2021/03/29 00:00 [revised]
PHST- 2021/03/30 00:00 [accepted]
PHST- 2021/04/29 05:40 [entrez]
PHST- 2021/04/30 06:00 [pubmed]
PHST- 2021/09/29 06:00 [medline]
AID - S0144-8617(21)00419-7 [pii]
AID - 10.1016/j.carbpol.2021.118032 [doi]
PST - ppublish
SO  - Carbohydr Polym. 2021 Jul 15;264:118032. doi: 10.1016/j.carbpol.2021.118032. Epub 
      2021 Apr 3.