Preparation and characterization of self-emulsified waterborne nitrocellulose

Carbohydr Polym. 2012 Jun 5;89(1):36-40. doi: 10.1016/j.carbpol.2012.02.029. Epub 2012 Feb 28.

Abstract

Waterborne nitrocellulose (WNC) dispersion was successfully synthesized by self emulsification and reaction among isophorone diisocyanate (IPDI), dimethylol propionic acid (DMPA) and nitrocellulose (NC). The WNC was characterized by transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy and thermal gravimetric analysis (TGA), etc. The WNC dispersion has Z-average particle size of 133 nm approximately and distribution index of 0.152. It is indicated by TEM that the cured WNC particles show a core-shell structure, in which hydrophobic component is encapsulated by the hydrophilic carboxyl. FTIR confirms that the reactions (i.e. IPDI and NC, IPDI and DMPA) have occurred, the - NCO group of IPDI has been consumed totally and the backbone of NC is retained. TGA reveals that the cross-linked WNC film has better thermal resistance, and the water resistance measurement confirms that it has weaker water-sensitivity.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aziridines / chemistry
  • Collodion / chemistry*
  • Cross-Linking Reagents / chemistry
  • Emulsions
  • Ethylamines / chemistry
  • Hydroxy Acids / chemistry*
  • Isocyanates / chemistry*
  • Microscopy, Electron, Transmission
  • Particle Size
  • Propionates / chemistry*
  • Spectroscopy, Fourier Transform Infrared
  • Thermogravimetry
  • Water / chemistry

Substances

  • Aziridines
  • Cross-Linking Reagents
  • Emulsions
  • Ethylamines
  • Hydroxy Acids
  • Isocyanates
  • Propionates
  • Water
  • isophorone diisocyanate
  • 2,2-bis(hydroxymethyl)-propionic acid
  • aziridine
  • Collodion
  • triethylamine