无机盐对窄分布醇醚羧酸盐性能影响

Effect of inorganic salt on the properties of narrow distribution alcohol ether carboxylate

研究了无机盐(NaCl、CaCl_2、MgCl_2、KCl、NH_4Cl、ZnCl_2)对氧化法窄分布醇醚羧酸钠(NAEC3/5/7/9)(EO加合数3/5/7/9)水溶液表面张力、润湿、泡沫、乳化、去污、缓蚀性能的影响。结果表明,无机盐对NAEC性能影响显著。无机盐均显著降低了体系的表面张力,二价盐降低幅度大于一价盐;无机盐加入均能增强对帆布片的润湿作用,CaCl_2及ZnCl_2增强作用最强,尤其是ZnCl_2可以将NAEC9润湿时间由不润湿缩短至173 s;除CaCl_2能够显著增强发泡性和稳泡性外,其他氯盐均加快了泡沫的破灭;其中NH4Cl对大豆油乳化作用破坏最为显著;无机盐的加入对炭黑及皮脂污渍去除不利,有利于蛋白污渍的去除;对于不同EO数NAEC,0.2%的CaCl_2加入量可使NAEC5润湿时间由27 s缩短至5 s。

The effect of inorganic salt(NaCl,CaCl2,MgCl2,KCl,NH4Cl,ZnCl2)on the surface tension,wettability,foam,emulsification,decontamination and corrosion inhibition performance of narrow distribution alcohol ether carboxylate sodium(NAEC,EO number 3/5/7/9)aqueous solution were investigated.The results show that the inorganic salts have a significant influence on NAEC property.Inorganic salts significantly reduced the surface tension,and divalent salt had a better reduction effect than monovalent salt.The addition of inorganic salt could enhance the wetting effect on canvas,and the enhancement effect of CaCl2 and ZnCl2 was the strongest.In particular,ZnCl2 shortened the wetting time of NAEC9 from non-wetting to 173 s.Except for CaCl2,which significantly enhanced foaming and foam stability,other chloride salts accelerated the collapse of the foam.NH4Cl had the most significant effect on the emulsification of soybean oil.Inorganic salts were not good for the removal of black carbon and sebum stains,but good for the removal of protein stains.For NAEC5 with different EO numbers,the addition of 0.2%CaCl2 reduced the wetting time from 27 s to 5 s.