直接染料染色实验（Direct dye dyeing experiment）.docVIP

直接染料染色实验（Direct dye dyeing experiment） Direct dye dyeing experiment.Txt Ive only had two things in my life: No, neither will it. Others have backgrounds, and I have back figures. The ideal of meat, the fate of cabbage. The ideal of meat, the fate of cabbage. White horse. Where have you been?! Did you lose the prince and dare not come to see me?. First, the purpose of the experiment Master the method of direct dye dyeing and learn the use of spectrophotometer. Learn to use spectrophotometer to determine the maximum absorption wavelength of dye, and draw the absorbance, dye concentration working curve, calculate the percentage of direct dye dyeing. Two 、 experimental principle Direct dyes have good water solubility and directness. When dyes are dissolved in water, they can be dyed onto the fiber. According to beers law, when a certain wavelength of light through the dye solution, dye concentration and absorbance is proportional to the concentration of the dye is calculated by measuring the absorbance of dye liquor. If the measured absorbance values before and after dye staining, we can calculate the direct dye uptake. Three, experimental content (1) direct dye dyeing process 1. experimental materials, instruments and pharmaceuticals (1) experimental material: three pieces of bleached cotton fabric (each weight about 4G). (2) experimental instruments: constant temperature water bath, electronic balance, balance, electric furnace, pipette (10ml) (50ml, 1000ml), beaker, glass dyeing cup (250ml), (100ml), a thermometer (100 DEG C), glass rod, angle spoon, bulb, electric iron. (3) experimental drugs: acetic acid (10g/l), sodium chloride, Y, direct dye fixing agent. 2. experimental steps (1) process prescription and condition; The prescription and condition of dyeing liquid are shown in table 10-1. Table 10-1 prescription and condition of dyeing liquid Prescription and prescription 1 Prescription 2 prescription 3 Direct dye 1 (to fabric weight%) 210 Direct dye 2 (to fabric