The influence of calcium chloride (2% (w/v), 3% (w/v), 4% (w/v) or 5% (w/v)) as crosslinker on the performance of sodium alginate (SA) and anthocyanin extracted from black wolfberry (BWA) based films was observed. The results showed that after CaCl(2) treatment, the elongation at break reduced, but the water resistance, thermal stability, and tensile strength of SA/BWA films were significantly improved and they increased with the increase of CaCl(2) concentration. In which, 5%-CaCl(2) treatment endowed the films with optimal performance, which ...
