以腐植酸钾（KHA）、纤维素（CEL）、丙烯酸（AA）、膨润土为主要原料，N，N-亚甲基双丙烯酰胺为交联剂（MBA），过硫酸钾（KPS）为引发剂，通过溶液聚合法和响应曲面法制备得到一种增强型保水剂。利用FT-IR、XRD、SEM对材料进行表征及系列吸水性测试。FT-IR分析结果表明，KHA/CEL/AA和KHA/CEL/AA-膨润土型保水剂均产生了酯羰基（CO）等特征峰；XRD测试结果表明，聚合态晶型与各原料相比明显无定型，说明反应性较好；SEM表征结果表明，KHA/CEL/AA-膨润土较KHA/CEL/AA有更大比表面积，褶皱区明显。KHA/CEL/AA在最佳制备条件下的吸水率达到247 g/g，5 h后保水率为102 g/g。膨润土溶液（4%）加入质量为8.5 g时，吸水率达到297 g/g，保水率达到129 g/g。

A reinforced water retaining agent is prepared jointly through solution polymerization method and response surface method, with potassium humate (KHA), cellulose (CEL), acrylic acid (AA) and bentonite as main raw materials, N, N'-methylenebisacrylamide (MBA) as crosslinking agent, and potassium persulfate (KPS) as an initiator.The obtained agent is characterized by infrared (FT-IR), X-ray diffractometry (XRD) and scanning electron microscopy (SEM).A series of water absorption tests are performed on the agent.The results from FT-IR show that both KHA/CEL/AA and KHA/CEL/AA-bentonite water retaining agents generate characteristic peaks such as ester CO.XRD test results show that the polymorphic crystal form of the agent shows an obvious amorphous compared with each raw material, indicating the reactivity is better.SEM results verify that KHA/CEL/AA-bentonite has a larger specific surface area and a more obvious wrinkle area than KHA/CEL/AA.KHA/CEL/AA prepared under the optimal conditions has a water absorption rate of 247 g·g^-1, a water retention rate of 102 g·g^-1 after 5 hours.KHA/CEL/AA-bentonite with 8.5 g of bentonite solution (4%) shows a water absorption rate of 297 g·g^-1 and a water retention rate is 129 g·g^-1.