Super absorbent polymers were developed in the late 1960s. In 1961, the Northern Research Institute of the U.S. Department of Agriculture grafted starch to acrylonitrile for the first time to make a HSPAN starch acrylonitrile graft copolymer that exceeded traditional water-absorbing materials. In 1978, Japan’s Sanyo Chemical Co., Ltd. took the lead in using super absorbent polymers for disposable diapers, which has attracted the attention of scientists from all over the world. In the late 1970s, UCC Corporation of the United States proposed to cross-link various olefin oxide polymers with radiation treatment, and synthesized non-ionic super absorbent polymers with a water absorption capacity of 2000 times, thus opening up the synthesis of non-ionic super absorbent polymers. Door. In 1983, Sanyo Chemicals of Japan used potassium acrylate in the presence of diene compounds such as methacrylamide to polymerize superabsorbent polymers. After that, the company has continuously produced various superabsorbent polymer systems composed of modified polyacrylic acid and polyacrylamide. At the end of the last century, scientists from various countries have successively developed and made superabsorbent polymers develop rapidly in countries all over the world. At present, the three major production groups of Japan Shokubai, Sanyo Chemical and Stockhausen of Germany have formed a three-legged situation. They control 70% of the world’s market today, and they conduct international joint operations through technical cooperation to monopolize the high-end market of all countries in the world. Right to sell water-absorbing polymers. Super absorbent polymers have a wide range of uses and very broad application prospects. At present, its main use is still sanitary products, accounting for about 70% of the total market.
Since sodium polyacrylate superabsorbent resin has great water absorption capacity and excellent water retention performance, it has a wide range of applications as a soil water retention agent in agriculture and forestry. If a small amount of super absorbent sodium polyacrylate is added to the soil, the germination rate of some beans and the drought resistance of bean sprouts can be improved, and the air permeability of the soil can be enhanced. In addition, due to the hydrophilicity and excellent anti-fogging and anti-condensation properties of super absorbent resin, it can be used as a new packaging material. The packaging film made of the unique properties of super absorbent polymer can effectively maintain the freshness of food. Adding a small amount of super absorbent polymer to cosmetics can also increase the viscosity of the emulsion, which is an ideal thickener. Utilizing the characteristics of super absorbent polymer that only absorbs water but not oil or organic solvents, it can be used as a dehydrating agent in industry.
Because super absorbent polymers are non-toxic, non-irritating to the human body, non-side reactions, and non-blood coagulation, they have been widely used in the field of medicine in recent years. For example, it is used for topical ointments with high water content and comfortable to use; to produce medical bandages and cotton balls that can absorb bleeding and secretions from surgery and trauma, and can prevent suppuration; to produce anti-bacterial agents that can pass water and medicines but not microorganisms. Infectious artificial skin, etc.
With the development of science and technology, environmental protection has attracted more and more attention. If the super absorbent polymer is put into a bag that is soluble in sewage, and the bag is immersed in the sewage, when the bag is dissolved, the super absorbent polymer can quickly absorb the liquid to solidify the sewage.
In the electronics industry, super absorbent polymers can also be used as humidity sensors, moisture measurement sensors, and water leak detectors. Super absorbent polymers can be used as heavy metal ion adsorbents and oil-absorbing materials.
In short, super-absorbent polymer is a kind of polymer material with a very wide range of uses. The vigorous development of super-absorbent polymer resin has huge market potential. This year, under the conditions of drought and low rainfall in most parts of northern my country, how to further promote and use superabsorbent polymers is an urgent task facing agricultural and forestry scientists and technicians. During the implementation of the Western Development Strategy, in the work of improving the soil, vigorously develop and apply the multiple practical functions of super absorbent polymers, which has realistic social and potential economic benefits. Zhuhai Demi Chemicals covers an area of more than 30,000 square meters. It specializes in the research and development and production of super absorbent materials (SAP) related products. It is the first domestic company engaged in super absorbent resins that integrates scientific research, production, sales, and technical services. high-tech enterprises. The company has independent intellectual property rights, strong research and development capabilities, and constantly launches new products. The project is included in the national “torch plan” and has been commended for many times by the national, provincial and municipal governments.
Application Area
1. Applications in agriculture and gardening
The super absorbent resin used in agriculture and horticulture is also called water-retaining agent and soil conditioner. my country is a country with serious water shortage in the world. Therefore, the application of water-retaining agents is becoming more and more important. At present, more than a dozen domestic research institutes have developed super absorbent resin products for grain, cotton, oil, and sugar. , Tobacco, fruits, vegetables, forests and other more than 60 kinds of plants, the promotion area exceeds 70,000 hectares, and the use of super absorbent resin in Northwest, Inner Mongolia and other places for large-area sand control greening afforestation. The super absorbent resins used in this aspect are mainly starch grafted acrylate polymer cross-linked products and acrylamide-acrylate copolymer cross-linked products, in which the salt has changed from sodium type to potassium type. The main methods used are seed dressing, spraying, hole application, or soaking plant roots after mixing with water to make a paste. At the same time, the super absorbent resin can be used to coat the fertilizer and then fertilize, so as to give full play to the utilization rate of the fertilizer and prevent waste and pollution. Foreign countries also use super absorbent resin as fresh-keeping packaging materials for fruits, vegetables and food.
2. Applications in medical and sanitation is mainly used as sanitary napkins, baby diapers, napkins, medical ice packs; gel-like fragrance materials for daily use to adjust the atmosphere. Used as a base medical material for ointments, creams, liniments, cataplasms, etc., it has the functions of moisturizing, thickening, skin infiltration and gelation. It can also be made into a smart carrier that controls the amount of drug released, release time, and release space.
3. Application in industry
Use the function of super absorbent resin to absorb water at high temperature and release water at low temperature to make industrial moisture-proof agent. In oilfield oil recovery operations, especially in old oilfields, the use of ultra-high molecular weight polyacrylamide aqueous solutions for oil displacement is very effective. It can also be used for the dehydration of organic solvents, especially for organic solvents with low polarity. There are also industrial thickeners, water-soluble paints, etc.
4.Application in construction
The fast-swelling material used in water conservancy projects is pure super absorbent resin, which is mainly used for plugging of dam tunnels during flood seasons, and plugging water for prefabricated joints of basements, tunnels and subways; used for urban sewage treatment and dredging projects The mud is solidified to facilitate excavation and transportation.
Post time: Dec-08-2021