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最有前途的无甲醛免烫整理剂之一。本研究的目的是研究聚羧酸基DP整理纤维素织物的污垢和污垢去除性能。主要研究结果如下：1.整理后织物的特征性能抗皱性作为DP性能的一个指标，受到多种因素的影响，如聚羧酸的使用和催化剂的浓度。聚羧酸整理引起织物泛黄，回潮率降低，并在织物上引入了官能团，即聚羧酸与纤维素之间的酯键和未酯化的羧基。2.整理织物的沾污性能整理后的棉织物，尤其是柠檬酸整理后的棉织物，与未整理对照相比，更容易被氧化铁沾污。在织物上的污染程度和羧基含量之间观察到线性相关性。在某些情况下，根据聚羧酸、纤维和污垢的组合，观察到改善的耐污性。3.整理织物的去污性能整理后的棉织物，特别是柠檬酸整理后的棉织物，在温和的碱性条件下和在硬水中与未整理的对照相比更容易释放氧化铁污垢。根据洗涤条件和污垢，观察到增加或减少的去污力。

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.