有机硅油改性水性酚醛的制备及其性能

以烯丙基聚氧化乙烯醚(PEO)和烯丙基缩水甘油醚(AGE)为原料，进行硅氢加成反应对有机硅油进行接枝改性，使其在水中具有分散性并引入了具有反应活性的环氧基团。使用红外光谱(FT-IR)和核磁共振氢谱(¹H-NMR)表征其结构，用示差扫描量热分析(DSC)和热重分析(TGA)表征改性硅油与水性酚醛树脂共混的稳定性和耐热性能。将有机硅改性酚醛树脂应用于机油滤纸，用扫描电镜(SEM)分析其微观形貌并探究其力学性能、耐油和耐高温性能。结果表明，PEO与AGE的摩尔比为3:1时共接枝有机硅在水中具有良好的分散性能，以5%的质量比与水性酚醛树脂共混复配后形成三维网络结构，具有良好的共混稳定性。通过浸渍增强的机油滤纸，其力学性能均有较大的提高。经过高温机油浸泡后的滤纸保持较高的力学性能，其挺度保持率、耐破度保持率和抗张强度保持率分别为55%、63%和87%。

Preparation and Properties of Aqueous Phenolic Resin Modified by Organosilicone Oil

Silicone oil was grafted and modified with allyl polyoxyethylene ether (PEO) and allyl glycidyl ether (AGE) via hydrosilylation reactions to enhance the dispersibility in water of the silicone oil, while proper amount of reactive epoxy groups were introduced in order to prepare aqueous phenolic resin. The structures, as well as the stability and heat resistance of the blends of modified silicone oil and aqueous phenolic resin were characterized by FT-IR, ¹H-NMR, differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) respectively. In addition, silicone-modified phenolic resin was applied to oil filter paper, of which the micro-morphology, mechanical properties, oil resistance and high temperature resistance were examined. The results show that after being co-grafted with PEO and AGE (3:1 in molar ratio) the silicone has good dispersibility in water, and then, the bland complex of aqueous phenolic resin with 5% (mass fraction) of the co-grafted silicone can forms a three-dimensional network structure with good stability. After being reinforced through impregnation of the above bland complex, the oil filter paper presents greatly enhanced mechanical properties. What is more, the reinforced oil filter paper shows high retention rate of mechanical properties even after soaking in high temperature oil, namely, retention rate of 55%, 63%, and 87% for stiffness, burst strength and tensile strength respectively.