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Physical properties and biocompatibility of cellulose/soy protein isolate membranes coagulated from acetic aqueous solution

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Abstract:

A series of cellulose/soy protein isolate (SPI) membranes was prepared from cellulose and SPI solution by casting and coagulation from 5 wt% acetic acid and 5 wt% sulphuric acid aqueous solution, respectively. The structure and properties of the membranes were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy and tensile testing. The effects of SPI content (W SPI) and the coagulants on the structure and properties of the membranes were investigated. The membranes exhibited porous structure. The pore size in the surfaces and cross-sections of the membranes increased with an increase of W SPI regardless of the coagulants. The membranes containing 10 wt% W SPI showed higher tensile strength and elongation at break than other membranes. The membranes with the same W SPI coagulated from acetic acid solution exhibited higher values of tensile strength, elongation at break and pore size in the surfaces and cross-sections than those corresponding membranes coagulated from sulphuric acid. The biocompatibility of the acetic acid-coagulated membranes was preliminarily evaluated by cell culture and in vivo implantation experiments. The results revealed that human umbilical vein endothelial cells (ECV304) grew well on this biomaterial. In comparison with the pure cellulose membrane, because of the incorporation of SPI and the resultant alteration of microstructure, the SPI-modified membranes showed an improved in vivo biocompatibility and biodegradability in the implantation experiments. These cellulose/SPI membranes warrant further explorations in biomedical fields.

Keywords: BIOCOMPATIBILITY; BLEND; CELLULOSE; MEMBRANE; SOY PROTEIN ISOLATE

Document Type: Research Article

DOI: http://dx.doi.org/10.1163/156856208783719491

Affiliations: 1: Research Center for Medical and Structural Biology, School of Basic Medical Science, Wuhan University, Wuhan 430071, China 2: Ministry Education Key Laboratory for Oral Biomedical Engineering, School of Stomatology, Wuhan University, Wuhan 430079, China 3: Bioproducts and Bioprocesses National Science Program, Agriculture and Agri-Food Canada, 107 Science Place, Saskatoon, SK, Canada S7N 0X2 4: Research Center for Medical and Structural Biology, School of Basic Medical Science, Wuhan University, Wuhan 430071, China; Bioproducts and Bioprocesses National Science Program, Agriculture and Agri-Food Canada, 107 Science Place, Saskatoon, SK, Canada S7N 0X2

Publication date: April 1, 2008

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