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Studies on the effects of the enzymatic treatment on silk fine powder
Author(s) -
Xu Weilin,
Ke Guizhen,
Peng Xuqiang
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.23529
Subject(s) - silk , crystallinity , materials science , sericin , particle size , chemical engineering , powder diffraction , solubility , composite material , polymer chemistry , nuclear chemistry , chemistry , organic chemistry , crystallography , engineering
In this study, the silk treated by steam explosion was pulverized into fine powder with a mean particle size of 1.829 μm, then the feasibility of the application of the protease treatment to produce finer and more uniform silk powder was investigated. The results indicated that after the enzymatic treatment, the mean diameter of the silk powder was reduced from 1.829 to 1.546 μm and the equivalent diameter distribution became more concentrated; thus, the uniformity of the particles was improved. The infrared spectra analysis demonstrated that the silk powder remained the β‐sheet crystalline structure. X‐ray diffraction analysis showed the crystallinity of the polished silk powder was very slightly strengthened. It was found that the treatment reduced some polar amino acid in the sericin; however, the composition of the kinds of the amino acids did not change. In addition, the hot water‐solubility and moisture regain of the polished silk powder declined very slightly. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 2967–2971, 2006