纤维素醚的作用机理初探

Study on the mechanism of etherified cellulose

研究了不同纤维素醚掺量时,自然养护条件下,砂浆的扫描电镜微观结构,以及荧光显微观察下,纤维素醚的失水固化作用机理。结果表明,在无外来水条件下,纤维素醚可显著提高砂浆的水化程度,随着纤维素醚掺量的增加,砂浆水化程度提高;将纤维素醚进行荧光染色处理,在荧光显微镜下观察纤维素醚的失水固化过程。其作用机理为:溶解后吸附大量水分,然后慢慢固化成膜,同时放出水分,其成膜和保水作用同时进行。

The SEM microstructure of mortar cured in air and water loss and solidifying mechanism by fluorescent microscope were studied in different dosage of etherified cellulose content. The results showed that, in the case of no additional water,the adding of etherified cellulose could significantly improve the degree of hydration. With increasing dosage of etherified cellulose,the mortar had a higher hydration degree. The water loss and solidifying process of etherified cellulose could be observed under a fluorescence microscope. Its mechanism is：it adsorb of large amount of water when dissolved, then slowly film, and release moisture, the filming and water retaining process occurs at the same time.