高阳离子密度分散剂合成与再生纤维分散性研究

Study on the Synthesis of High Cation Density Dispersant and the Dispersion of Regenerated Fiber

采用单因素变量方法制备高阳离子密度分散剂,研究了反应时间、反应温度对制备分散剂性能的影响,根据水泥沉降测试结果,筛选出3h/70℃的最优反应条件,样品水泥柱高度为65ml。TG测试发现,分散剂起始热分解温度达220℃,热稳定性良好。通过正置显微镜和SEM表征,分散剂改性纤维后,聚合物分子包裹于纤维圆柱体表面,分散剂和纤维形成了稳定的体系,使得纤维可以更好的分散在水泥基材料中。

The single factor variable method was used to prepare the high cation density dispersant. The effects of reaction time and temperature on the performance of the dispersant were studied. According to the cement settlement test results, the optimal reaction conditions of 3h/70 ℃ were selected. The height of the sample cement column was 65 ml. TG test showed that the initial thermal decomposition temperature of the dispersant was 220 ℃, and the thermal stability was good. Through the characterization of the upright microscope and SEM, after the fiber is modified by the dispersant, the polymer molecules are wrapped on the surface of the fiber cylinder, and the dispersant and fiber form a stable system, so that the fiber can be better dispersed in the cement-based materials.