Preparation method of attapulgite-based high-molecular water-absorbing resin
A technology based on polymer and water-absorbing resin, which is applied in the field of preparation of attapulgite-based polymer water-absorbing resin, which can solve the problems of poor anti-aging ability, high cost, and easy oxidation and decomposition.
Active Publication Date: 2019-05-03
任珺 +1
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Problems solved by technology
Superabsorbent resin also has excellent water absorption and water retention performance, but its anti-aging ability is poor, it is prone to oxidative decomposition, and its cost is high, so it has not been widely used, but with continuous research and development, its performance has been significantly improved. development potential
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Embodiment 1
[0034] 1. Acid modification method of attapulgite clay
[0035] Attapulgite clay was collected from the ore point (N39°15′, E100°16′) of Linze Banqiao Town, Gansu Province. The main mineral content is: attapulgite 29.7%, quartz 21.8%, feldspar 14.6%, dolomite 6.3%, Montmorillonite 5.3%, gypsum 5.1%.
[0036] The collected attapulgite clay raw ore is crushed, ground, and passed through a 200-mesh standard sieve to obtain raw ore powder. Put the powder in a beaker, add sufficient distilled water, stir well to disperse the powder evenly in the water, and let it stand for 30 minutes to remove the impurities in the upper layer of the suspension and the black precipitate at the bottom. Wash repeatedly until the bottom black precipitate is completely removed. Separate and dry in an oven at 105°C, pass through a 100-mesh sieve after grinding, and set aside.
[0037] Weigh a certain amount of the spare attapulgite clay powder above and put it in a beaker, add 4mol / L sulfuric acid ac...
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Abstract
The invention provides a preparation method of attapulgite-based high-molecular water-absorbing resin. The preparation method comprises the following steps: (1) preparing acid modified attapulgite clay; (2) preparing a monomer solution; (3) preparing an acid modified attapulgite clay solution; (4) preparing an initiating-crosslinking agent solution; and (5) adding the acid-modified attapulgite clay solution obtained in the step (3) and the initiating-crosslinking agent solution obtained in the step (4) into the monomer solution obtained in the step (2), uniformly carrying out stirring, carrying out a reaction at a temperature of 80 DEG C, and after the reaction is finished, carrying out washing and drying to obtain the attapulgite-based high-molecular water-absorbing resin. According to the invention, graft copolymerization is carried out on the attapulgite clay which is subjected to acidification, purification and modification with acrylic acid, acrylamide and the like under ordinaryheating and ultrasonic action, and the attapulgite-based high-molecular water-absorbing resin which has high water absorption capacity, high mechanical properties and low material cost and can adapt to harsh environments is prepared.
Description
technical field [0001] The invention relates to a preparation method of an attapulgite-based polymer water-absorbing resin. Background technique [0002] Desertification prevention and control is a practical problem faced by our country, and it is also a worldwide problem. Although the current situation of land desertification in my country has improved and the development trend has been curbed, there are still large areas of desertified land that need to be treated, and the task of desertification control is still very arduous. The causes of land desertification are complex. We need to increase investment in science and technology, open up ideas, research and develop more advanced, practical, low-cost, and effective sand-fixing technologies and materials, and technically improve the level of sand prevention and control. [0003] The research on sand-fixing materials has gone through more than half a century. At present, hundreds of materials and chemical preparations have ...
Claims
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Login to View More IPC IPC(8): C08F220/06C08F220/56C08F222/38C08F2/44C08K9/02C08K3/34
Inventor 任珺陶玲刘依琳张倩张凌云
Owner 任珺