Superabsorbents (SAP) are loosely crosslinked hydrophilic polymers can absorb a large amounth of water. In a soil it works as moistre bufor limiting plant water stres. It has been observed mixing SAP with soil decrease its strength parameters. To prevent that phenomena a kind of geocomposite absorbing water was introduced. It is a flat tube made from geotextile, filled with superabsorbent. Application of the geocomposite limits a problem of water avability for plant, which increase slopes erosion resistance. ...
This study presents the analysis of basic properties of selected superabsor-bents. The main objective was to determine the real absorption level, which is cru-cial for the accurate selection of such dosage of superabsorbent that would result in expected increase in crops and would be cost efficient at the same time. The in-fluence of grain size distribution, type of superabsorbent, temperature and the presence of ions in the water on the volume of absorption and the course of the absorption processwere determined,. in order to supplement the information pro-vided by manufacturers and authors of scientific publications. Due to the wide range of applications of superabsorbents there are no accurate data on their properties for specific applications. For the analyzed Aquasorb superabsorbents (3005 KS, KM and KL) the best absorption results were achieved for medium grain sizes, not for small grain sizes as stated by the manufacturer, due to the formation of clumps that prevented small particles to heave quickly - some of the particles trapped inside such clumps could participate in the absorption process only to a limited extent. The tests conducted in demineralized water with superabsorbents of a similar grain size distribution but different chemical composition - Aquaterra and Aquasorb ...
Recently, trehalose becomes more and more popular compound. Increasing interest in this disaccharide results from the role as it starts to play in water economy of plants. In conditions of water shortage mentioned organic substance prevents their dehydration. Therefore, application of such interesting additive can contribute to the preparation of materials that can be applied in such areas as agriculture or cultivation of plants. It is also worth mentioning that properties of trehalose make this substance interesting from the medical point of view. Presented additive can have an impact on maintaining organs for transplantation in good condition. In presented research series of polymer superabsorbents modified with described disaccharide have been prepared. Obtained by means of photopolymerization materials differed in an amount of the additive. In the further step, physicochemical properties of superabsorbents have been determined. Following studies have been carried out: swelling studies and incubation studies in simulated body fluids aimed at determination of behavior of prepared materials in solutions similar to those one occurring in human body. Additionally, chemical structure of the hydrogels have been defined using spectroscopic technique. Based on the research it can be concluded that proposed materials are characterized by low sorption capacity and did not ...
