Effect of composite cross-linker on properties of cassava starch composite film
Tapioca starch and polyvinyl alcohol were cross-linked by the cross-linker.By means of single-factor experiments,the tensile strength of composite membranes was the main basis to determine the ratio of starch and polyvinyl alcohol,the type of crosslinker,the amount of crosslinking agent,crosslinking temperature and crosslinking time.The constructure of the composite membrane was analyzed by IR.The experimental results showed that: starch and polyvinyl alcohol have taken place in a better cross-linking,starch and polyvinyl alcohol for the best ratio of 5:3,crosslinker with the ratio of 1:1 for three satisfied metaphosphoric acid to boric acid,the amount of crosslinking agent about 0.2 g,the temperature of crosslinking is 130 ℃,crosslinking time is 3 h.