印染用海藻酸钠的溶解性能

Solubility of sodium alginate for printing and dyeing

海藻酸钠是一种从褐藻中提取的大分子多糖,在印染工业中有着广泛的应用。由于印花时需要将海藻酸钠溶解形成黏稠的溶液,而海藻酸钠的溶解速度、透网性、流动性等直接影响到印花效果。为提高海藻酸钠印花糊料的溶解速度,保证其完全溶解,研究了海藻酸钠的粒度、黏度、溶解温度对其溶解速度的影响,并对比了助溶剂对溶解速度的改善效果。结果表明:海藻酸钠较适宜的黏度为400~600 mPa∙s,较适宜的溶解粒度为40~80目,较适宜的溶解温度为25~35℃,较适宜的搅拌速度为700~900 r/min,助溶剂无水硫酸钠较适宜的加入量为海藻酸钠、无水硫酸钠质量比60∶40,丙三醇较适宜的加入量为海藻酸钠、丙三醇质量比99∶1。

Sodium alginate is a kind of macromolecular polysaccharide extracted from brown algae,which is widely used in printing and dyeing industry.Due to sodium alginate needs to be dissolved to form a viscous solution during printing,the dissolution rate,mesh permeability and fluidity of sodium alginate directly affect the printing effect.In order to improve the dissolution rate of sodium alginate printing paste and ensure its complete dissolution,the effects of particle size,viscosity and dissolution temperature of sodium alginate on the dissolution rate of sodium alginate are studied,and the effects of cosolvent on the dissolution rate are compared.The results show that the appropriate viscosity of sodium alginate is 400~600 mPa·s,dissolving particle size is 40~80 mesh,dissolving temperature is 25~35℃,stirring speed is 700~900 r/min,the mass ratio of sodium alginate to anhydrous sodium sulfate is 60∶40,and the mass ratio of sodium alginate to glycerol is 99∶1.