Abstract：
:As an important direct solvent for cellulose, N-methyl morpholine N-oxide (NMMO) is environmentally friendly, and potentially very economical. Silk fibroin (SF) (Bombyx mori) can also be dissolved directly in NMMO.H2O. However, it is unexpectedly difficult to obtain a silk fibroin solution with a concentration higher than 10wt.% in this way, and extensive degradation of silk fibroin occurs if the dissolution temperature is higher than 110 degrees C. On the other hand, it is found that regenerated silk fibroin (RSF) film is much easier to dissolve in NMMO.H2O than ordinary SF. The RSF in NMMO.H2O can be easily concentrated to a range from 10 to 25wt.%. The structural differences between the degummed silk fiber and the RSF film lead to this different solubility in NMMO.H2O. The rheological behavior of concentrated RSF/NMMO.H2O solutions were also investigated. Regenerated silk fiber was spun from this type of solution, and its strength can reach up to 3.07 cN/dtex.
journal_name
Int J Biol Macromoljournal_title
International journal of biological macromoleculesauthors
Xu Y,Zhang Y,Shao H,Hu Xdoi
10.1016/j.ijbiomac.2004.11.008keywords:
subject
Has Abstractpub_date
2005-04-01 00:00:00pages
155-61issue
3-4eissn
0141-8130issn
1879-0003pii
S0141-8130(05)00010-3journal_volume
35pub_type
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