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  • Sacui, Iulia A. (författare)

Comparison of the Properties of Cellulose Nanocrystals and Cellulose Nanofibrils Isolated from Bacteria, Tunicate, and Wood Processed Using Acid, Enzymatic, Mechanical, and Oxidative Methods

  • Artikel/kapitelEngelska2014

Förlag, utgivningsår, omfång ...

  • 2014-04-18
  • American Chemical Society (ACS),2014
  • printrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:kth-147042
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-147042URI
  • https://doi.org/10.1021/am500359fDOI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • QC 20140624
  • This work describes the measurement and comparison of several important properties of native cellulose nanocrystals (CNCs) and cellulose nanofibrils (CNFs), such as crystallinity, morphology, aspect ratio, and surface chemistry. Measurement of the fundamental properties of seven different CNCs/CNFs, from raw material sources (bacterial, tunicate, and wood) using typical hydrolysis conditions (acid, enzymatic, mechanical, and 2,2,6,6-tetramethylpiperidiny1-1-oxyl (TEMPO)-mediated oxidation), was accomplished using a variety of measurement methods. Atomic force microscopy (AFM), transmission electron microscopy (TEM), and C-13 cross-polarization magic angle spinning (CPMAS) nuclear magnetic resonance (NMR) spectroscopy were used to conclude that CNCs, which are rodlike in appearance, have a higher crystallinity than CNFs, which are fibrillar in appearance. CNC aspect ratio distributions were measured and ranged from 148 +/- 147 for tunicate-CNCs to 23 +/- 12 for wood-CNCs. Hydrophobic interactions, measured using inverse gas chromatography (IGC), were found to be an important contribution to the total surface energy of both types of cellulose. In all cases, a trace amount of naturally occurring fluorescent compounds was observed after hydrolysis. Confocal and Raman microscopy were used to confirm that the fluorescent species were unique for each cellulose source, and demonstrated that such methods can be useful for monitoring purity during CNC/CNF processing. This study reveals the broad, tunable, multidimensional material space in which CNCs and CNFs exist.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Nieuwendaal, Ryan C. (författare)
  • Burnett, Daniel J. (författare)
  • Stranick, Stephan J. (författare)
  • Jorfi, Mehdi (författare)
  • Weder, Christoph (författare)
  • Foster, E. Johan (författare)
  • Olsson, Richard T.KTH,Polymera material,Wallenberg Wood Science Center(Swepub:kth)u1ob386f (författare)
  • Gilman, Jeffery W. (författare)
  • KTHPolymera material (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:ACS Applied Materials and Interfaces: American Chemical Society (ACS)6:9, s. 6127-61381944-82441944-8252

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