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

聚羧酸是最有发展前途的纤维材料无甲醛耐久压整理剂之一。本研究的目的是研究聚羧酸整理的纤维素织物的沾污和去污性能。主要研究结果如下：1.整理后织物的特性抗皱性能受多元羧酸用量、催化剂浓度等多种因素的影响，作为衡量防皱效果的一个指标。多元羧酸整理会导致织物泛黄，回潮率降低，并在织物上引入官能团；多元羧酸与纤维素之间的酯键和未酯化的羧基。2.整理后的棉织物，尤其是柠檬酸整理的棉织物，比未整理的对照更容易受到氧化铁的污染。沾污度与织物上的羧基含量呈线性相关。3.整理后的棉织物，尤其是柠檬酸整理的棉织物，与未整理的对照相比，在弱碱性条件下和在硬水中更容易释放氧化铁土壤。根据洗涤条件和土壤的不同，洗涤剂的去污力会增加或减少。

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.