Changes in soiling and soil removal properties of cellulosic fabrics induced by polycarcaboxylic acid-based DP finishing

聚羧酸是纤维素材料中最有前途的一种无甲醛DP（耐压）整理剂。本研究的目的是研究聚羧酸基DP整理纤维织物的污垢和除土性能。本研究的结果总结如下：1。聚羧酸用量、催化剂浓度等因素对织物的抗皱性能有影响，抗皱性能是衡量织物DP性能的指标。聚羧酸基整理引起织物发黄，回潮率降低，织物上引入官能团；聚羧酸与纤维素之间的酯键和未酯化的羧基。经整理棉织物，尤其是柠檬酸经整理棉织物，与未整理对照相比，更容易被氧化铁弄脏。织物上的羧基含量与脏的程度呈线性相关。在某些情况下，根据多羧酸、纤维和土壤的组合，观察到土壤抗性的提高。经整理棉织物，尤其是柠檬酸经整理棉织物，在温和的碱条件下和硬水条件下，比未整理棉织物更容易释放出氧化铁土壤。根据洗涤条件和土壤的不同，观察到去污力的增减。

Polycarboxylic acid is one of the most promising nonformaldehyde DP (durable press) finishing agents for cellulosic materials. The objective of this study was to investigate soiling and soil removal properties of polycarboxylic acid-based DP finished cellulosic fabrics. The results of this study are summarized as follows.1.Characteristic properties of finished fabrics Wrinkle resistance as a measure of DP performance was affected by various factors such as polycarboxylic acid used and catalyst concentration. Polycarboxylic-acid based finishing caused fabric yellowing, a decrease in moisture regain and an introduction of functional groups on the fabric ; ester bonds between polycarboxylic acid and cellulose and unesterified carboxyl groups.2.Soiling properties of finished fabrics Finished cotton fabrics, especially citric acid finished cotton, were more susceptible to soiling with iron oxide compared to the unfinished control. A linear correlation was observed between the degree of soiling and the carboxyl content on the fabric. Improved soil resistance was observed in some cases depending upon a combination of polycarboxylic acid, fiber and soil.3.Soil removal properties of finished fabrics Finished cotton fabrics, especially citric acid finished cotton, released iron oxide soil more easily compared to the unfinished control in mild alkali conditions and in hard water. Increased or decreased detergency was observed according to washing condition and soil.