Physical properties of microporous membranes prepared by hydrolyzing cellulose/soy protein blends
✍ Scribed by Yun Chen; Lina Zhang; Jiaming Gu; Jun Liu
- Publisher
- Elsevier Science
- Year
- 2004
- Tongue
- English
- Weight
- 674 KB
- Volume
- 241
- Category
- Article
- ISSN
- 0376-7388
No coin nor oath required. For personal study only.
✦ Synopsis
Microporous membranes (CS1-n) were prepared by blending cellulose and soy protein isolate (SPI) in 6 wt.% NaOH/5 wt.% thiourea aqueous solution. The membranes CS1-n were hydrolyzed with 5 wt.% NaOH aqueous solution to obtain membranes CS2-n. The structure and properties of the membranes were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy (SEM), the flow rate method, and tensile testing. The blend membranes CS1-n exhibited mesh structure woven by SPI and cellulose, and the membranes CS2-n possess microporous structure as a result of the removal of SPI during the NaOH-hydrolysis process. The apparent pore size (2r e ) measured with SEM, the mean pore size (2r f ) obtained by the flow rate method, and the water ultrafiltration rate (UFR) of the CS1-n and CS2-n membranes increased with an increase in SPI content, and are higher than those of the pure cellulose membrane and previous membranes. The values of 2r f (47.7-77.2 nm) and UFR (28-53.5 mL h -1 m -2 mmHg -1 ) of the microporous membranes CS2-n are higher than those of the corresponding membranes CS1-n, because of removing of most of SPI by NaOH-treatment. The microporous membranes also kept high tensile strength in both dry and wet states. In addition, the membranes CS2-n containing a small amount of SPI are suitable for the culture of Vero cells. Therefore, the membranes could be used as candidates for application in separation technology and biomedical fields.