Extraction of pigment from Magnolia grandiflora leaves and its application in anti-free radical
Pigment is extracted from Magnolia grandiflora leaves and then applied to cotton fabric.The maximum absorption wavelength,absorbance,free radical clearance rate of pigment solution and free radical clearance rate of cotton fabric are determined.The effects of magnolia grandiflora leaves,sodium sulfite,extraction temperature and storage time on the maximum absorption wavelength,absorbance and free radical clearance rate of pigment solution are explored.The influence of pigment concentration and washing times on free radical clearance rate of finished cotton fabric are investigated.The extraction conditions are magnolia grandiflora leaves 100 g/L,sodium sulfite 10 g/L,extraction at 90 ℃ for 2 h,and storage time of one week.The maximum absorption wavelength is 280 nm,the absorbance of 240 times diluted extract is 0.21,and the free radical clearance rate of 300 times diluted extract reaches 61％.The free radical clearance rate of cotton fabric is 43％,and the free radical scavenging rate of pigment cotton fabric is 9％after washing for 5 times,when the finishing conditions are 4 g cotton fabrics,40 mL pigment solution of 100 g/L magnolia grandiflora leaves,bath ratio 1∶50,finishing at 80 ℃ for 1 h.
NETL
NSTL
万方数据
维普
