3Rials V G,Glasser W G.Engineering plastics from lignin.Ⅳ.Effect of crosslink density on polyurethane film properties-variation in NCO:OH ratio[J].Holzforschung,1984(38):191-199.
4Uraki Y,Kubo S,Sano Y.Preparation of activated carbon moldings from the mixture of waste newspaper and isolated lignins:mechanical strength of thin sheet and adsorption property[J].Wood Sci,2002(48):521-526.
5Felby C,Hassingboe J,Lund M.Pilot-scale production of fiberboards made by laccase oxidized wood fibers:board properties and evidence for cross-linking of lignin[J].Enzyme and Microbial Technology,2002(31):736-741.
6Varaf V P,Glasser W G.Engineering plastics from lignin.Ⅲ.Structure property relationships in solution cast polyurethane[J].Appl Polym Sci,1984(29):1831-1840.
9VANDERLAAN M N, THRING R W. Polyurethane from alcell lignin fractions obtained by sequential solvent extraction[J]. Biomass Bioenergy, 1998,14:525 - 531.
10PAN X J, SANO Y S. Atmospheric aectic acid pulping of wheat straw I :pulping conditions and properties of pulp[ J]. Japan Tappi, 1998, 52:408-415.
