Study on property of lauryl sodium sulfate modified halloysite nanotubes-rapeseed protein blend film

Modified halloysite nanotubes was fabricated by using lauryl sodium sulfate and halloysite. And the modified rapeseed protein film was prepared by using the rapeseed protein as matrix and the modified halloysite nanotubes as filler. The results of the film's mechanical properties showed that the optimum addition of the modified halloysite nanotubes was 3%,the tensile strength of the film improved by 20% approximately,and the elongation at break was 20%. The results of the TG tests showed that the modified film appeared a new weight loss peak at 506℃ caused by burn of the rapeseed protein which combined with the halloysite nanotubes. It could be conclude from the DSC curves that the heat release peaks of the modified film shifted16℃ to the low temperature,which illustrated the film's heat endurance had a slight decrease. The FTIR tests of the film showed that the lauryl sodium sulfate modified the halloysite by physical absorption. Rapeseed protein partly cross linked with the halloysite nanotubes and strength the interfacial strength between rapeseed protein and hallosite nanotubes.