Guo Yi, Yao Cheng
School of Chemistry & Molecular Engineering, Nanjing Tech University, No. 30 Puzhunan Road, PuKou District, Nanjing 211816, China.
Jiangsu OSiC New Materials Technology Research Co., Ltd., No. 56 Nanhai Road, Zhangjiagang Chemical Industrial Park, Suzhou 215633, China.
Polymers (Basel). 2025 Apr 28;17(9):1204. doi: 10.3390/polym17091204.
In this study, polymerized silicone surfactants were modified with polyether and tertiary amine groups with the aim of improving the surface performance. Various PSiEO/(PO)-OH(CH) surfactants were synthesized and their structures and performance were characterized through H NMR, FTIR spectroscopy, static surface tension, dynamic surface tension, zeta potential, and dynamic light scattering measurements. Subsequently, the modified silicones were incorporated as surfactants in aqueous solutions with different pH values. The surfactants with different hydrophobic/hydrophilic groups and end-capping groups exhibited different surface performances over a wide pH range. Thermodynamic parameters indicated that the micellization and adsorption of these surfactants were endothermic and spontaneous processes driven by entropy. The processes were hindered by increasing the solution pH and modification with hydrophobic groups. The aggregation behavior was significantly different under acidic, neutral, and basic aqueous conditions.
在本研究中，为了改善表面性能，用聚醚和叔胺基团对聚合有机硅表面活性剂进行了改性。合成了各种PSiEO/(PO)-OH(CH)表面活性剂，并通过核磁共振氢谱（¹H NMR）、傅里叶变换红外光谱（FTIR）、静态表面张力、动态表面张力、zeta电位和动态光散射测量对其结构和性能进行了表征。随后，将改性有机硅作为表面活性剂加入到不同pH值的水溶液中。具有不同疏水/亲水基团和封端基团的表面活性剂在很宽的pH范围内表现出不同的表面性能。热力学参数表明，这些表面活性剂的胶束化和吸附是由熵驱动的吸热自发过程。通过提高溶液pH值和用疏水基团改性，这些过程受到阻碍。在酸性、中性和碱性水溶液条件下，聚集行为有显著差异。
