用溶胶微球法制备变色涤纶织物的温致变色机制及其性能

为获得一种有效的温变色功能纺织品，采用溶胶微球法制备温变色染料对涤纶织物进行染色，探讨染料浓度、染色pH值及时间对织物K/S值的影响，并通过红外光谱分析了染色织物温变色机制，考察了温变色涤纶织物的温变色可逆性、温变色响应速度及时间。结果表明：在质量浓度为6g/L，pH为6，染色90min条件下，染色织物的K/S值为11，干、湿摩擦牢度均在4级以上，水洗变色牢度为4级，沾色牢度为5级，染色性能较好。温变色染料在热作用下由于电子转移导致共轭体系减小使染色织物在30~55℃由深蓝色逐渐变为无色，温度降低，织物颜色恢复深蓝色，温变色差为30，变色响应速度为17s^-1 ，响应时间为1s，因此，溶胶微球法温度响应变色涤纶织物具备灵敏且可逆的温变色性能。

Thermochromic mechanism and performance of polyester fabric based on sol-microsphere process

Polyester fabrics were dyed with thermochromic dyeprepared by sol-microsphere process. Influences of dye concentration, pH and time on the K/S values were discussed. The thermochromic mechanism of the dyed fabric was analyzed by FTIR. The reversible thermochromic property, response rate and time of the thermochromic polyester fabric were also investigated. Results showed K/S value of the polyester fabrics dyed with 6 g/L dye concentration at pH=6 for 90 min was 11, meanwhile the rubbing fastness and washing fastness were all above 4 scale，showinggood dyeing performance. The dyed fabric gradually changed from blue to colorless from 30°C to 55°C because of the decrease of the conjugated system caused by electron transfer of the thermochromic dye under heating effect. The dyed fabric can restore to blue at lower temperature, the color difference was 30, thermochromic response rate was 17 s-1, and response time was 1 s. In consequence, the thermochromic polyester fabric prepared based on sol-microcapsule process hasreversible andsensitive thermochromic properties.