【摘要】 为了改善食用色素中的靓蓝色素在纸张上的固色效果,在浆外染色过程中添加阳离子淀粉,探究了阳离子淀粉在纸张表面固色的机理,以及不同取代度阳离子淀粉的固色效果,并确定了最优固色工艺。采用单因素实验探究了阳离子淀粉的取代度、染液pH值、染液温度、阳离子淀粉用量对纸张固色效果的影响。通过光学显微镜、扫描电子显微镜观测结果推测出带负电的靓蓝色素与带正电的阳离子淀粉相互吸引而紧密结合,携带着靓蓝色素的阳离子淀粉,再与显负电的纤维紧密结合,使颜色稳定固着于纸上。结果表明,取代度越高的阳离子淀粉作为靓蓝色素固色剂的效果越好,即取代度为0. 06的阳离子淀粉固色效果最好,最佳固色条件为:染液pH值6,染液温度80℃,阳离子淀粉用量1. 5%,较不添加固色剂的空白组固色效果提升84. 4%。更多还原

【Abstract】 In order to improve the effect of color fixation on paper,the cationic starch was added in paper dyeing process. In this paper,the mechanism of color fixation on paper surface by cationic starch,the effects of substitution degrees with different cationic starchs and the most optimal fixation technique were studied. Single factor experiments,such as the effects of cationic starch substitution degree,dosage of cat?ionic starch,dye solution pH value and temperature on color fixation efficiency were carried out. It was inferred by optical microscope and SEM observation that due to the close attraction of the negatively charged edible pigments and the positively charged cationic starch. In turn the cationic starch which carries the edible pigment was closely combined with the negatively charged fibers,making the color was fixed on paper. The experiment showed that the higher substitution degree of cationic starch was,the better fixing effect would be. What’s more,the best conditions for color fixation were found as follows:pH value 6,temperature was 80℃,cationic starch dosage was 1. 5%,the color fixa?tion effect upgraded 84. 4% compared with the blank group.更多还原