Effect of reaction conditions on the properties and behavior of wood cellulose nanocrystal suspensions

被引:1282
作者
Beck-Candanedo, S
Roman, M
Gray, DG [1 ]
机构
[1] McGill Univ, Dept Chem, Pulp & Paper Res Ctr, Montreal, PQ H3A 2A7, Canada
[2] Virginia Polytech Inst & State Univ, Dept Wood Sci & Forest Prod, Blacksburg, VA 24061 USA
关键词
D O I
10.1021/bm049300p
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Sulfuric acid hydrolysis of native cellulose fibers produces stable suspensions of cellulose nanocrystals. Above a critical concentration, the suspensions spontaneously form an anisotropic chiral nematic liquid crystal phase. We have examined the effect of reaction time and acid-to-pulp ratio on nanocrystal and suspension properties for hydrolyzed black spruce acid sulfite pulp. Longer hydrolysis times produced shorter, less polydisperse black spruce cellulose nanocrystals and slightly increased the critical concentration for anisotropic phase formation. Increased acid-to-pulp ratio reduced the dimensions of the nanocrystals thus produced; the critical concentration was increased and the biphasic range became narrower. A suspension made from a bleached kraft eucalyptus pulp gave very similar properties to the softwood nanocrystal suspension when prepared under similar hydrolysis conditions.
引用
收藏
页码:1048 / 1054
页数:7
相关论文
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