Water-retaining agent with repeated moisture absorption and water release functions and preparation method thereof

The invention belongs to the technical field of polymer composite materials, and relates to a water-retaining agent with repeated moisture absorption and water release functions and a preparation method of the water-retaining agent. 2%-15% of a photo-thermal material; 1%-25% of a high moisture absorption substance; 0.8%-4% of an initiator; and 0.8%-4% of a cross-linking agent. The invention provides a water-retaining agent with repeated moisture absorption and water release functions aiming at solving the problem that the existing water-retaining agent technology cannot meet the moisture requirement of crops in an environmental area which is extremely deficient in rainfall and irrigation conditions, and the water-retaining agent is used for capturing water vapor from air and utilizing the water vapor. 本发明属于高分子复合材料技术领域，涉及一种具有反复吸湿、释水功能的保水剂及其制备方法，本发明包括以下组份：按下述重量百分比配置原料：乙烯类单体30％-90％；光热材料2％-15％；高吸湿物质1％-25％；引发剂0.8％-4％；交联剂0.8％-4％。本发明针对在极其匮乏降水与灌溉条件的环境区域，现有保水剂技术无法满作物的水分需求，而提供一种具有反复吸湿、释水功能的保水剂，从空气中捕集水汽并利用。