Method for preparing degradable high water-absorbing resin by using ultrasonic wave

Abstract

The invention discloses a preparation method of a degradable super absorbent resin by using ultrasonic wave. Based on ultrasonic treatment technology, the invention adopts a new synthesis technology to prepare the degradable super absorbent resin. The invention is realized through the following procedures: 1. modification treatment of corn stalks; 2. ultrasonic treatment of the corn stalks; and 3. preparation of the super absorbent resin. The invention applies the ultrasonic treatment technology into the absorbent resin preparation, and greatly shortens the reaction time; after treatment, the solution polymerization occurs immediately at high temperature; the invention has simple preparation technology without nitrogen protection, and the prepared products have good water-absorption capacity. The products can improve water conditions of the soil, can be degraded into organic fertilizer, and improve crop growth environment, which is suitable for agricultural extension and utilization.

Description

technical field [0001] The invention relates to a technology for efficiently preparing degradable superabsorbent resin by using ultrasonic treatment technology, which belongs to the field of polymer materials. Background technique [0002] my country has planted 33.34 million hectares of corn all year round. Calculated at 6,000-7,500 kilograms of straw per hectare, 200 to 250 billion kilograms of straw can be produced every year. After the autumn harvest in the vast rural areas, a large amount of corn straw has nowhere to digest, or is burned, or is only used as fuel , Corn stalks are everywhere, which not only pollutes the environment, but also causes great waste. Corn stalks contain a large amount of active ingredients such as sugar, crude fiber, protein, and a variety of medium and trace elements. It is a kind of agricultural solid waste and a renewable resource. However, at present, corn straw cellulose has not been effectively utilized, which not only causes great waste...

AI Technical Summary

Problems solved by technology

[0006] However, most of the synthesis methods reported at this stage require nitrogen protection, high requirements on equipment, and long preparation and drying times; and most of the current superabsorbent resin raw materials are starch, or cellulose extracted from platycodon grandiflorum cotton fibers, such as Chinese patent 01145399.0 The polymerization process of a cellulose derivative water-absorbent resin reported requires high temperature and the product collection is relatively complicated, and the preparation process is cumbersome; the superabsorbent resin prepared by grafting acrylonitrile with starch under the condition of nitrogen protection as reported in Chinese patent 90105865.3 requires Alkali saponification under high temperature conditions, all of which increase the cost of water-absorbent resins and limit their promotion and application to a certain extent

[0007] The traditional method of preparing water-absorbent resin requires high temperature, nitrogen protection and mechanical stirring during gelatinization, long polymerization time, low production efficiency, and relatively high cost

At present, there is no report on the use of ultrasonic waves in the preparation of water-absorbent resins. As a new form of energy, ultrasonic waves are being used in chemical reactions and are increasingly attracting attention.