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Composite Foaming Agents on the Basis of High-Molecular Natural Surfactants

机译：基于高分子天然表面活性剂的复合发泡剂

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Today, naturally occurring foam constituents and surface-active proteins with intriguing structures and functions are being identified from a variety of biological and chemical sources. In this paper we studied the colloid chemical properties of high-molecular natural surfactants such as keratin hydrolyzate (1.5a??15%), gelatin (0.1a??1%), and egg albumin (0.1a??1%) in a wide concentration range. The foaming ability and foam-stabilizing properties of mixtures of these proteins were established. The high stability of foams obtained from mixtures of surfactants can be explained by the formation of mixed structured layers from the surface-active associates, promoting the thickening of foam films. The ratio of polymer mixtures was optimized (keratin (15%)-albumin (1%) (1:1)) to produce high-quality foaming agents. The foam parameters such as surface tension, capillary pressure of the Plateau-Gibbs channels, radii of curvature, critical micelle concentration, and relative viscosity were defined. The high surface activity and foam stability corresponds to a pH close to the isoelectric state of the proteins. This occurs due to the conformational changes of macromolecules of the protein at the liquid-gas interface, forming particles of colloidal size.
机译：如今，人们从各种生物和化学来源中鉴定出具有有趣结构和功能的天然泡沫成分和表面活性蛋白。在本文中，我们研究了高分子天然表面活性剂的胶体化学性质，例如水解角蛋白（1.5a？15％），明胶（0.1a？1％）和蛋清蛋白（0.1a？1％）。浓度范围广。建立了这些蛋白质混合物的起泡能力和泡沫稳定特性。由表面活性剂混合物获得的泡沫的高稳定性可以解释为由表面活性缔合剂形成混合结构层，从而促进了泡沫膜的增稠。优化了聚合物混合物的比例（角蛋白（15％）-白蛋白（1％）（1：1））以生产高质量的发泡剂。定义了泡沫参数，如表面张力，Plateau-Gibbs通道的毛细管压力，曲率半径，临界胶束浓度和相对粘度。高表面活性和泡沫稳定性对应于接近蛋白质等电状态的pH。这是由于蛋白质的大分子在液-气界面处的构象变化，形成胶体大小的颗粒而发生的。

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