摘要
采用腐植酸钠对棉织物进行染色,研究染色pH值、温度、浴比、氯化钠和腐植酸钠用量对染色织物色深值的影响,探讨腐植酸钠对棉纤维的吸附动力学和热力学。研究结果表明:染浴pH值对染色织物的色深值影响很小,随着染色温度的升高,染色织物的色深值逐渐降低,氯化钠质量浓度为0～15 g/L时染色织物色深值逐渐增加,随着染色浴比的增大染色织物的色深值逐渐降低,腐植酸钠在棉纤维上具有很好的提升性能;染色温度越高,腐植酸钠在棉纤维上的吸附速率越快,半染时间越短,平衡吸附量越低;腐植酸钠在棉纤维上的吸附适合用Freundlich热力学吸附模型描述,其与棉纤维以氢键和范德华力结合为主。
Sodium humate was applied to the dyeing of cotton fabrics.The effects of pH value,temperature,dosages of sodium chloride and sodium humate,and bath ratio on △E value of the dyeings were investigated,along with the absorption dynamics and thermodynamics of sodium humate on cotton.It was found that pH values had less effect on △E value of the dyed fabrics;the △E value decreased with the increase of temperature and bath ratio.When the dosage of sodium chloride ranged from 0 to 15 g/L,the △E value increased with the increase of sodium chloride,but decreased with the increase of the bath ratio;sodium humate exhibited good building-up on cotton;higher the dyeing temperature,faster the absorption rate of sodium humate on cotton;and shorter the half-dyeing time t1/2,lower the equilibrium uptake C∞.Freundlich equation is fit to describe the absorption of sodium humate on cotton,its absorption on cotton is effected mainly by hydrogen bonding and Van der Waals forces.
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2013年第7期74-78,共5页
Journal of Textile Research
关键词
腐植酸钠
棉
色深值
吸附
动力学
热力学
sodium humate
cotton
△E value
absorption
kinetics
thermodynamics
