摘要
从乳状液的沉降稳定性、破乳电压、电导率和微观形态等几个方面,系统地研究了无机盐对十二烷基苯磺酸钠稳定的O/W乳状液相态和稳定性的影响。结果表明,高价金属盐会导致乳状液破乳或转相,其中FeCl_3只能导致乳状液破乳,不能引发转相,其他金属盐引发乳状液转相的能力依次为CrCl_3>MgCl_2>CaCl_2>SrCl_2>BaCl_2;金属盐浓度过高时不利于转相后的乳状液的稳定;OH-或部分酸根可以消除高价金属离子对乳状液的影响,Na_2CO_3、NaOH、Na_2SiO_3和Na_3PO_4可以与Cr^(3+)反应生成不溶物,使W/O乳状液再次转相为O/W型,而Na2SO_4、H2SO_4和H3PO4则不能使乳状液发生逆转相。
mThis paper studied the effects of inorganic salts on the phase and stability of O/W emulsion by observing the sedimentation stability property, emulsion-breaking voltage, electrical conductivity and mi-crostructures. The results showed that multivalent metal salts led to the demulsification or phase inversion of the O/W emulsion. The ability of multivalent metal salts that impel emulsion phase inversion to happen was arranged in the sequence of CrCl3 〉 MgCl2 〉 CaCl2 〉 SrCl2 〉 BaCl2. But FeCl3 only triggered demulsi-fication not phase inversion. And the excessive concentration of metal salt reduced the stability of emul-sion. OH - or acid radical ions can remove the effects of multivalent metal ions on O/W emulsion. The precipitates were formed by the reaction of Na2CO3, NaOH, Na2SiO3, and Na3P0 4 with Cr3＋ leading to W/O emulsion inverting to O/W type. On the contrary, Na2S0 4, H2S0 4 and H3P0 4 can not result in emulsion reversible inversion.
出处
《应用化工》
CAS
CSCD
北大核心
2017年第5期809-813,819,共6页
Applied Chemical Industry
基金
国家科技重大专项(2011ZX05005-006-007HZ)
关键词
无机盐
乳状液
可逆转相
稳定性
inorganic salts
emulsion
reversible inversion
stability
