Super absorbent polymer(SAP)from LG can be replaced by Chinafloc SAP
Polymer absorbent resin (SAP) is a typical functional polymer material, SAP for short. It can absorb hundreds or even thousands of times its own weight of water, and has a strong water retention ability, so it is also called super absorbent or high water retention agent. The sanitary field is mainly used as raw materials for sanitary napkins and diapers.
Polymer water-absorbing agent resin, its molecular structure has a network molecular chain. Water absorption agent encountered water immediately after electrolysis, dissociation for positive and negative ions, this kind of positive and negative ions and water have a strong affinity for cooperation, so that it has a strong water absorption and water preservation, can quickly absorb hundreds of times heavier than their own water or even thousands of times. It absorbs water and expands into a hydrogel.
Highly absorbent resin is a kind of macromolecule containing hydrophilic groups and crosslinked structure. It was first prepared by Fanta et al. using starch grafted polyacrylonitrile and then saponified. Divided by raw materials, there are starch (graft, carboxymethylation, etc.), cellulose (carboxymethylation, graft, etc.), synthetic polymer (polyacrylic acid, polyvinyl alcohol, polyoxyethylene, etc.) several categories. Compared with starch and cellulose, polyacrylic acid high absorbent resin has a series of advantages, such as low production cost, simple process, high production efficiency, strong water absorption ability, long shelf life and so on. It has become a research hotspot in this field. At present, polyacrylic acid system accounts for more than 80% of the world production of highly absorbent resins.
use
High water absorbent polymer is widely used and has a very broad application prospect. At present, its main use is still sanitary products, accounting for about 70% of the total market. Due to the water absorption capacity of sodium polyacrylate high absorbent resin, and has excellent water retention performance, so as soil water retention agent in agriculture, forestry application range is very wide. If a small amount of superabsorbent sodium polyacrylate is added to the soil, the germination rate of some legumes and the drought resistance of the seedlings can be improved, making the soil more breathable. In addition, because of its hydrophilicity and excellent anti-fog and anti-condensation properties, it can be used as a new packaging material. Using the unique properties of the highly absorbent polymer, the packaging film can effectively maintain the freshness of food. Adding a small amount of highly absorbent polymer in cosmetics can also increase the viscosity of its emulsion, which is an ideal thickener. It can also be used as a dehydrating agent in industry by using high absorbent polymer which only absorbs water and does not absorb oil or organic solvent.
Physical properties of highly absorbent resin are shown in figure
Physical properties of highly absorbent resin are shown in figure
In recent years, the superabsorbent polymer has been widely used in the field of medicine because it has the characteristics of non-toxicity, no irritation to human body, no side effects and no blood coagulation. For example, for water content, comfortable use of external ointment; Producing medical bandages and cotton balls that can absorb bleeding and secretory fluid from surgery and trauma and prevent suppuration; Creating anti-infectious artificial skin that allows water and chemicals to pass through but microbes cannot.
With the development of science and technology, people pay more and more attention to environmental protection. If a superabsorbent polymer is placed in a bag soluble in sewage, and the bag is immersed in sewage, when the bag is dissolved, the superabsorbent polymer can quickly absorb the liquid and make the sewage solid.
In the electronics industry, high absorbent polymer can also be used as humidity sensor, moisture measurement sensor and water detector. High water absorbent polymer can be used as heavy metal ion adsorbent and oil absorbing material.
In short, the high water absorbent polymer is a kind of polymer material with a very wide range of uses, and vigorously developing the high water absorbent polymer resin has a huge market potential. This year, in the situation of drought and little rain in most of the northern areas of our country, how to further promote and use the highly absorbent polymer is an urgent task in front of the agricultural and forestry technologists. In the course of the implementation of the western development strategy, in the work of soil improvement, the development and application of a variety of practical functions of the highly absorbent polymer have practical social benefits and potential economic benefits.
