Self-assembly of pulp derivatives as amphiphilic compounds: Preparation of amphiphilic compound from acetic acid pulp and its properties as an inclusion compound

被引:17
作者
Uraki, Y
Hashida, K
Sano, Y
机构
[1] Department of Forest Science, Faculty of Agriculture, Hokkaido University, Sapporo
[2] Department of Forest Science, Faculty of Agriculture, Hokkaido University, Kita-9, Nishi-9, Kita-ku
关键词
acetic acid pulp; amphiphilic compounds; hydroxypropylation; inclusion compounds; self-assembly; self-aggregates; transmission electron microscopy;
D O I
10.1515/hfsg.1997.51.1.91
中图分类号
S7 [林业];
学科分类号
0829 ; 0907 ;
摘要
Acetic acid pulp (AAP) containing more than 8 % residual lignin was chemically modified to prepare hydroxypropylated pulps (HP-AAPs) by treatment with propylene oxide under alkaline conditions. HP-AAPs with residual lignin had an amphiphilic properly. After negative staining, transmission electron micrographs indicated that HP-AAP formed self-aggregates in water which were converted into small particles with diameters in the nano meter range by ultrasound sonication. The aggregates were revealed to have strong hydrophobic domains by the fluorometric study of their complexes with fluorescent reagents as indicators for hydrophobicity. However, commercial hydroxypropylated cellulose and carboxymethylated AAP did not form self-aggregates and had little hydrophobic domain. These results suggest that HP-AAP aggregates in water by the hydrophobic interaction of the residual lignin, and the aggregates have a tendency to form complexes with hydrophobic materials. Thus, the amphiphilic derivatives have the same properties as inclusion compounds do.
引用
收藏
页码:91 / 97
页数:7
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