期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 73, 期 -, 页码 264-269出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijbiomac.2014.11.011
关键词
Carboxymethylated; Bacterial cellulose; Surface; Protein adsorption
资金
- National Natural Science Foundation of China Project [51073024, 51273021]
- National Science and Technology Support Project of China [2011BAK15B04]
Carboxymethylated bacterial cellulose (CBC) membranes with different degrees of substitution (DS) were prepared by surface carboxymethylation of bacterial cellulose, which were characterized by FTIR, contact angles and zeta potential. Both the contact angels and zeta potentials increased with the increase of degrees of carboxymethylation. Protein adsorption behaviors of CBC membranes were investigated with bovine serum albumin (BSA) as model protein and the adsorption quantity increased gradually with the increase of the DS. The protein adsorption was not only governed by the chemical structure of CBC, but also by the electrostatic interaction between CBC and BSA. The protein was found to be adsorbed on CBC membrane at pH lower its isoelectric point (pI) while no protein was adsorbed at pH above its pI. The protein adsorption on the CBC membranes was also characterized by scanning electron microscopy (SEM). (C) 2014 Elsevier B.V. All rights reserved.
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