新型水性环氧乳化剂的乳化性能及应用研究

关键字：新型,水性,环氧,乳化剂,乳化,性能,研究

（1. 广州航海学院 航务工程系，广东 广州  510725；2.中国水利水电第八工程局科研设计院，湖南 长沙  410007）

    摘要：以双酚A型环氧树脂E-44和聚乙二醇为原料，合成新型水性环氧乳化剂，对其溶解性和稳定性进行试验研究，同时分析其对水泥砂浆性能的影响。结果表明，环氧乳液在聚乙二醇的相对分子质量为4000、6000时与E-44合成的乳化剂稳定性较好，最佳工艺为：n（E-44）∶n（PEG-6000）＝1.25，乳化剂占环氧树脂总质量的20%～25%，乳化温度为50～60 ℃。水性环氧乳液对水泥砂浆起缓凝作用，且水泥砂浆后期抗压、抗折强度和化学稳定性都随着乳液掺量的增大先提高后降低，乳液的最优掺量为8%。
    关键词：环氧乳化剂；乳化性能；稳定性；水泥砂浆
    中图分类号：TU57+8.12；TQ314.255        文献标识码：A        文章编号：1001-702X（2017）12-0058-05

The research on emulsifying property and application of new water-based epoxy emulsifier
LIU Wenxian1，XIE Zhihong1，TIAN Chengyu2
（1.School of Harbor Engineering，Guangzhou Maritime Institute，Guangzhou 510725，China；
2.SinoHydro Bureau 8 Co. Ltd.，Changsha 410007，China）

    Abstract：A new type of water-based epoxy emulsifier was synthesized with bisphenol a epoxy resin E-44 and polyethylene glycol as raw materials and the solubility and stability were studied. The influence of emulsifier on cement mortar was analyzed. The result shows：The stability of the emulsifier composited with E-44 is good when the molecular weight of epoxy emulsion in polyethylene glycol was 4000 and 6000. The optimal process shows that：epoxy resin to PEG 6000 was 1.25∶1，the optimum value of the total mass of the epoxy resin is 20% to 25% and the optimum temperature of emulsification is 50 ℃ to 60 ℃. Water based epoxy emulsion has a retarding effect on cement mortar and the compressive strength，flexural strength and chemical stability of cement mortar in the later stage first increased and then decreased，and the optimum dosage was 8%.
    Key words：epoxy emulsifier，emulsifying properties，stability，cement mortar