Preparation and characterization of alginate hydrogel membranes crosslinked using a water‐soluble carbodiimide
作者： J. B. Xu , J. P. Bartley , R. A. Johnson
DOI: 10.1002/APP.12713
关键词:
摘要: The preparation of alginate hydrogel membranes by the film immersion method was optimized for maximum crosslinking using swelling measurements as an indicator degree crosslinking. variables investigated were concentration nonsolvent (ethanol) sodium alginate, water-soluble carbodiimide (WSC) concentration, and pH medium. Optimum conditions resulted when medium contained 60 vol % ethanol 100 mM WSC at 4. Membranes prepared different concentrations (100 WSC, 4) (60 ethanol, infrared spectroscopy. spectra showed characteristic ester linkage (crosslinking) band 1698 cm−1 in cases where indicated that had occurred. Differential scanning calorimetry noncrosslinked crosslinked increased crystallinity membrane. Durability trials optimum determined this work retained all weight immersed water 32 days. these possessed characteristics required use pervaporation separation ethanol–water mixtures. These also have potential protective coatings hydrophobic, microporous membrane distillation osmotic feeds containing surface active components. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 747–753,
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