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Structure and properties of chitin/alginate blend membranes from NaOH/urea aqueous solution.

Abstract：

:Chitin/alginate (CA) blend membranes were successfully prepared from 8 wt% NaOH/4 wt% urea aqueous solution by coagulating with 0.5M CaCl(2) aqueous solution containing 5 wt% HCl. Morphology, mechanical properties, thermal stability, and antimicrobial effects of the membranes were investigated by scanning electron microscopy, IR and UV spectroscopes, X-ray diffraction, tensile tests, thermogravimetric analysis, water swelling and antimicrobial tests. The CA blends were miscible when the content of alginate was range from 33 to 67 wt%. The crystallinity of the blend membranes decreased with an increase of alginate. Comparing with chitin membranes, the tensile strength and breaking elongation of the blend membranes were obviously improved in dry and wet states. The best values of the tensile strength and breaking elongation were 48 MPa and 27%, respectively. All the blend membranes still retained obvious antimicrobial effects toward S. aureus and E. coli. Therefore, they showed potential for biomedical application.

journal_name

Int J Biol Macromol

journal_title

International journal of biological macromolecules

authors

Li G,Li W,Deng H,Du Y

doi

10.1016/j.ijbiomac.2012.08.030

subject

Has Abstract

pub_date

2012-12-01 00:00:00

pages

1121-6

issue

5

eissn

0141-8130

issn

1879-0003

pii

S0141-8130(12)00346-7

journal_volume

51

pub_type

杂志文章

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