On the physicochemical properties and foaming characteristics of proteins in cement environment
On the physicochemical properties and foaming characteristics of proteins in cement environment
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DOI：
10.1016/j.conbuildmat.2022.130204
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发表时间：
2023-02
影响因子：
7.4
通讯作者：
Mohammad Sadegh Tale Masoule;Elvis Baffoe;A. Ghahremaninezhad
中科院分区：
文献类型：
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作者：
Mohammad Sadegh Tale Masoule;Elvis Baffoe;A. Ghahremaninezhad
本文研究了蛋白质的物理化学性质及其在胶凝材料合成孔溶液(SPS)中的发泡特性，以帮助了解其引气性能。对13种不同分子结构和理化性质的蛋白质进行了研究。对不同浓度下蛋白质的流体力学尺寸、电荷、粘度、表面张力、泡沫能力和稳定性进行了表征。用光学显微镜研究了泡沫气泡的大小和结构。结果表明，在与胶凝材料相关的高pH条件下，蛋白质的负电荷增加，流体力学尺寸减小。SPS对蛋白质表面张力的影响没有表现出特定的趋势。与在去离子水(DI)中相比，这些蛋白质在SPS中表现出更好的起泡性能，这是因为它们的物理化学性质发生了变化。分析了泡沫塑料的气泡尺寸分布。光学显微镜显示，SPS中泡沫中的泡沫膜粗糙度和厚度增加，表明与DI中的泡沫相比，稳定性增强。在SPS中，蛋白质的表面张力对其发泡行为的影响比在DI中要小。
This paper investigates the physicochemical properties of proteins and their foaming characteristics in a synthetic pore solution (SPS) of cementitious materials to aid in understanding their air-entraining performance. A total of 13 proteins with different molecular structures and physicochemical properties were studied. Hydrodynamic size, charge, viscosity, surface tension, and foam capacity and stability of the proteins at different concentrations were characterized. Optical microscopy was employed to study the foam bubble size and structure. It was shown that proteins gained an increased negative charge and their hydrodynamic size generally decreased at high pH relevant to cementitious materials. The effect of SPS on surface tension of the proteins did not show a specific trend. The proteins demonstrated improved foaming in SPS compared to in deionized water (DI) due to the change in their physicochemical properties. The bubble size distributions of the foams were analyzed. Optical microscopy showed increased roughness and thickness of the bubble film in the foam in SPS, indicating enhanced stability compared to the foam in DI. The effect of surface tension of the proteins on their foaming behavior was shown to be less in SPS than in DI.