PAMAM改性海藻酸钙纤维的染色热力学  

Dyeing thermodynamics of alginate fiber modified with PAMAM

作　　者：王臻[1] 张传杰[1] 杨宏[1] 朱平[1] 

机构地区：[1]武汉纺织大学"新型纺织材料绿色加工及其功能化"教育部重点实验室,湖北武汉430073

出　　处：《印染》2011年第1期1-4,共4页China Dyeing and Finishing

基　　金：国家自然科学基金(50773032);国家自然科学基金(51073122);湖北省自然科学基金(2009CDA033)

摘　　要：采用直接染料湖蓝5B对PAMAM改性海藻酸钙纤维进行染色热力学研究,绘制了上染速率曲线和吸附等温线,并计算了直接染料湖蓝5B在纤维上的染色亲和力、染色热和染色熵。与未改性的海藻酸钙纤维相比,PAMAM改性海藻酸钙纤维的平衡上染百分率与纤维中PAMAM的含量成正比关系,直接湖蓝5B在PAMAM改性海藻酸钙纤维上的吸附等温线呈Nernst型,随着染色温度的升高,吸附等温线斜率增加,染色亲和力增加;染料的上染过程是放热反应,直接染料湖蓝5B的上染会引起整个染色体系的紊乱度增加,随着纤维中PAMAM含量的增加,染色热的绝对值增加,染料在纤维上的亲和力增加。Salt-free dyeing of PAMAM modified calcium alginate fiber is carried out with C. I. Direct Blue 15. Dyeing thermodynamics is studied, including dye uptake, the adsorption isotherm of the fibers, dyeing affinity, heat and entropy. Compared with alginate calcium fibers, the dyeing behaviors of PAMAM modified calcium alginate fiber are much better, and the improving level is in direct proportion to the content of PAMAM in the fiber. Adsorption isotherm for C. I. Direct Blue 15 on PAMAM modified calcium alginate fiber is a Nernst-type. The slope of adsorption isotherm and dyeing affinity increase along with the increase in dyeing temperature. Dyeing process is an exothermic reaction which increases the disorders of the dyeing system. Absolute value of dyeing heat and dyeing affinity increase with the increase in the content of PAMAM in the fiber.

关 键 词：染色 直接染料 热力学 海藻酸钙纤维 树状大分子 

分 类 号：TS101.921[轻工技术与工程—纺织工程]