Makarewicz Edwin, Michalik Agnieszka
Faculty of Chemical Engineering and Technology, University of Technology and Life Sciences, Seminaryjna St. 3, 85-326 Bydgoszcz, Poland.
J Surfactants Deterg. 2014;17(4):773-784. doi: 10.1007/s11743-013-1518-5. Epub 2013 Aug 18.
This work reports tests performed to evaluate the stability of aqueous dispersions of inorganic oxide pigments with different specific surface areas, with the use of anionic and non-ionic surfactants and concentrators. Color mixtures of oxide compounds of blue, green, olive and brown with the unit cell spinel structure were used as pigments. The sodium salt of sulfosuccinic acid monoester, oxyethylenated nonylphenol and ethoxylated derivatives of lauryl alcohol, fatty alcohol and fatty amine were used as surfactants. The concentrators used were: poly(vinyl alcohol), the sodium salt of carboxymethyl cellulose as well as a water-based polyurethane oligomer. The highest dispersion efficiency was found for dispersed systems in which surfactant and concentrator were incorporated in the formula. The one containing the sodium salt of carboxymethyl cellulose or polyurethane oligomer with ethoxylated saturated fatty alcohol or fatty amine was found to be the most efficient. It was discovered that a higher dispersion efficiency corresponds to pigments with larger specific surface. The efficiency is also found to improve when the concentrator is an acrylic polymer or copolymer made up of two acrylic species. In this case, the concentrator interaction with the surfactant is more effective if the value of its boundary viscosity number is higher. This observation confirms the existence of interactions between macro-chains of the concentrator and surfactant molecules forming micelles with the pigment particles.
本研究报告了为评估具有不同比表面积的无机氧化物颜料水分散体的稳定性所进行的测试，测试中使用了阴离子和非离子表面活性剂及增效剂。具有单位晶胞尖晶石结构的蓝色、绿色、橄榄色和棕色氧化物化合物的颜色混合物用作颜料。磺基琥珀酸单酯钠盐、氧乙烯化壬基酚以及月桂醇、脂肪醇和脂肪胺的乙氧基化衍生物用作表面活性剂。所使用的增效剂有：聚乙烯醇、羧甲基纤维素钠盐以及水性聚氨酯低聚物。对于在配方中加入了表面活性剂和增效剂的分散体系，发现其分散效率最高。发现含有羧甲基纤维素钠盐或聚氨酯低聚物与乙氧基化饱和脂肪醇或脂肪胺的体系效率最高。研究发现，较高的分散效率对应于具有较大比表面积的颜料。当增效剂是由两种丙烯酸类物质组成的丙烯酸聚合物或共聚物时，效率也会提高。在这种情况下，如果其特性粘数的值较高，则增效剂与表面活性剂之间的相互作用更有效。这一观察结果证实了增效剂的大分子链与与颜料颗粒形成胶束的表面活性剂分子之间存在相互作用。
