磷石膏基新型保水材料的工艺及其性能研究

Study on Technology and Performance of New Type of Water Retention Material With Phosphogypsum

文章对1种磷石膏基新型保水材料性能进行研究。该研究采用不同制备工艺、不同有机和无机添加剂,并借助显微观察及保水性相关参数测定的方法,探索了采用固体废弃物磷石膏制备新型保水材料的工艺、性能及其保水机理,得到了较目前常用的高吸水树脂保水技术更好的效果。研究发现,新型保水材料的性能与其孔结构密切相关,而孔结构又主要取决于制备工艺,所以调整制备参数可使石膏保水材料性能达到最佳。研究得出该材料实际种植保水率最高达111.11%,较目前高吸水树脂实际种植保水率提高一倍。文章还研究了发泡工艺、粘土、高吸水树脂及聚乙烯醇等对保水性能的影响及对保水材料的作用。研究表明,采用发泡工艺,实际种植保水率最高可达77.78%。粘土改性保水材料实际种植保水率最高可达100.00%。高吸水树脂、聚乙烯醇对石膏保水材料作用不大。但甲基纤维素及海藻酸钠改性石膏效果较好。

In this paper, the properties of a new phosphogypsum based water retention material were studied, with different preparation methods, organic and inorganic additives, and the methods of microscopic observation and water retention related parameters determination. Based on these, the technology, performance and water retention mechanism of new water retention material made from solid waste phosphogypsum were explored, and the better effect than the existing super absorbent resin water retention technology had been gotten. It is found that the performance of the new water retaining material is closely related to its pore structure, and the pore structure is related to the preparation process, therefore, adjusting the preparation parameters can achieve the best performance of gypsum water retention material. The results also show that the actual water retention rate is up to 111.11%, which is twice as high as that of the existing super absorbent resin. The effects of foaming technology, clay, super absorbent resin and polyvinyl alcohol effect on the materials as well as its water retention property were studied. The results showed that the highest water retention rate could be up to 77.78 % by using foaming technology, the actual water retention rate of clay modified water retaining material was up to 100 %. High water absorbent resin and polyvinyl alcohol have little effect on gypsum water retention material, but methyl cellulose and sodium alginate modified gypsum have much better effect.