The ability of aspen soda and wheat straw soda lignin to stabilize the”rapeseed oil-in-water”(O/W)emulsion,depending on the pH value and concentration of the applied water solutions as well as on the lignin chemical composition and molecular mass,and the sizes and zeta potential of lignin particles was studied.It was shown that the O/W emulsion stabilized with the alkaline water solutions of wheat straw lignin demonstrated the highest stability in alkaline medium,while the ability of aspen soda lignin to prevent the coalescence of oil droplets manifested itself in a whole range of the studied pH values.With decreasing pH values of the wheat straw lignin water solution,the drop in the separation volume of the O/W emulsion was insignificant with the exception for the lignin enhanced concentrations in acidic medium.The aggregative stability of the O/W emulsion,which was stabilized with aspen soda lignin,increased with decreasing pH values and increasing lignin content in the emulsion.The findings indicated that the stabilization of the O/W emulsion with the alkaline lignin solutions proceeded via the electrostatic stabilization mechanism,while in the neutral and acidic medium,this mechanism was more complicated,with a growing role of the ability of lignin to form interfacial polymeric films at the liquid/liquid interface.The comparison of the stability of the O/W emulsion showed that aspen soda lignin was a better stabilizer of the O/W emulsion than wheat straw lignin.
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机译：阿斯彭苏打和小麦秸秆苏打水的能力稳定“菜籽油 - 水”（O / W）乳液，取决于所施加水溶液的pH值和浓度以及木质素化学成分和分子研究了木质素颗粒的质量和尺寸和Zeta潜力。显示用碱性秸秆木质素碱水溶液稳定的O / W乳液显示出碱性介质的最高稳定性，而Aspen Soda Lignin将预防的能力油滴的聚结体现在研究的pH值的整个范围内。随着小麦秸秆木质素水溶液的pH值降低，O / W乳液的分离体积的下降与木质素增强的例外有微不足道酸性介质中的浓度。用Aspen Soda Lignin稳定的O / W乳液的聚集稳定性随着pH值的降低和乳液中的木质素含量增加而增加。结果表明，通过静电稳定机制稳定o / w乳液，通过静电稳定机制进行，而在中性和酸性介质中，这种机制更加复杂，具有越来越多的木质素形成界面聚合物的作用。液体/液体界面的薄膜。O / W乳液稳定性的比较显示，Aspen Soda Lignin是O / W乳液的稳定剂，而不是小麦秸秆木质素。
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