01770naa a2200265 a 450000100080000000500110000800800410001902400270006010000220008724500930010926000090020230000090021152010220022065000140124265000240125665000280128065000130130865000120132165300160133365300150134970000240136470000200138870000170140877300790142520822572018-05-21       2018    bl uuuu     u00u1 u    #d7 a10.1002/APP.456842DOI1 aDELUCIS, R. de A.  aForest-based resources as fillers in biobased polyurethane foams.h[electronic resource]  c2018  a7 p.  aSix fillers from forestry wastes (wood, bark, cones and needles from young pine trees, kraft lignin, and recycled paper sludge from industry wastes) were incorporated into polyurethane (PU)-based foams prepared via free-rise pouring method. Variable filler contents (1, 5, and 10 wt %) and NCO/OH ratios (0.6, 0.9, and 1.2) were investigated. A simple mixture (1:3) of castor oil and crude glycerin (byproduct from biodiesel production) was used as biobased polyol. The foam composites were investigated through spectroscopy, morphological, mechanical, and hygroscopic analyses. The addition of fillers decreased water uptake and yielded rigid PU systems with more homogenous cell structure. The 1% and 5% reinforcement wood were the most effective among the studied compositions, with better mechanical and hygroscopic performance, probably due the higher compatibility of the wood with the PU system, which promote urethanic bonds between filler and isocyanate, as indicated by wet chemical results and micrographs.  aCellulose  aComposite materials  aComposite wood products  aCelulose  aMadeira  aCompósitos  aThermosets1 aMAGALHAES, W. L. E.1 aPETZHOLD, C. L.1 aAMICO, S. C.  tJournal of Applied Polymer Sciencegv. 135, n. 3, artigo 45684, Jan. 2018.