Journal
CELLULOSE
Volume 24, Issue 3, Pages 1355-1370Publisher
SPRINGER
DOI: 10.1007/s10570-016-1168-7
Keywords
Cellulose fibers; N-Methylmorpholine N-oxide; Silver nanoparticles; Polyethylenimine
Funding
- Diamond Grant program [DI2012 005142]
- National Science Centre [DEC-2012/07/B/ST8/03698]
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We present a method for synthesis of silver nanoparticles in N-methylmorpholine N-oxide (NMMO) and the associated mechanism, as well as their use for in situ volume modification of cellulose fibers. The synthesized particles had diameter of about 4 nm, and their colloid solution was stable for 1 year. The nanoparticles were stabilized using polyethylenimine, which apart from preventing nanoparticle agglomeration, also accelerated Ag+ ion reduction and prevented NMMO degradation. A mechanism for the nanoparticle synthesis is suggested based on the electrochemical potentials of all ions in solution, with perhydroxyl ions resulting from NMMO reducing the silver ions. We also created nanocomposites from fibers and silver nanoparticles, in which the latter showed very good dispersion in the fiber volume. Such spun fibers showed improved mechanical parameters in comparison with unmodified fibers.
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