用ATRP方法在蚕丝织物表面接枝含氟丙烯酸酯的拒水整理工艺条件优化试验

Technological Process Optimization Experiment on Water Repellence Finishing of Silk Fabric Grafted with Fluorinated Acrylate via ATRP Method

采用原子转移自由基聚合(ATRP)方法将甲基丙烯酸三氟乙酯、甲基丙烯酸六氟丁酯和甲基丙烯酸十二氟庚酯3种含氟丙烯酸酯化合物单体与蚕丝接枝共聚,制备具有拒水性能的蚕丝织物。研究采用不同单体接枝蚕丝的工艺中单体用量、反应液pH值、反应时间、反应温度、催化剂CuBr浓度等因素对接枝率的影响,在综合考虑各种因素影响的基础上,优化蚕丝织物采用上述3种单体接枝的工艺条件,使蚕丝织物的接枝率分别达到66.89%、64.50%、20.18%。蚕丝织物原样的表面接触角为88.9°,采用上述3种单体接枝后蚕丝织物的表面接触角分别增加到122.4°、127.4°、133.3°,表明接枝改性后蚕丝织物的拒水性能有一定程度提高。

In this work,silk fabrics were grafted and copolymerized with three kinds of fluorinated acrylate monomer(trifluoroethyl methacrylate,hexafluorobutyl methacrylate and dodecafluoroheptyl methacrylate) via atom transfer radical polymerization(ATRP) method to confer silk fabric with water repellence property.The effects of different grafting technological parameters such as monomer dosage,pH value of reaction solution,reaction time,reaction temperature,and concentration of catalyst CuBr on grafting rate were investigated when different monomers were used.Based on comprehensive consideration to effects of various factors,technological processes for grafting the above three monomers onto silk fabrics were optimized.The grafting rate of silk fabrics reached 66.89%,64.50% and 20.18% respectively.Surface contact angle of the grafted silk fabric was increased to 122.4° and 127.4° and 133.3° respectively from the original 88.9°.These results showed that the water-repellence of silk fabrics was increased after grafting and property modification.