Preparation method of salt-resistant water-absorbent resin with high water absorption rate

A water-absorbent resin and superabsorbent technology, applied in the field of preparation of salt-resistant water-absorbent resin, can solve the problems of complex preparation method of superabsorbent resin, single product function, poor absorption capacity, etc. , the effect of convenient storage

Active Publication Date: 2014-04-09
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The raw materials used are cheap, but the preparation method of the superabsorbent resin is complicated, and the maximum water absorption rate of physiological saline within 1 minute does not exceed 50g/g, and the water absorption rate is relatively low
Another example is the Chinese patent document CN101402702A (Patent No.: 200810197688.1) which discloses a modification method for improving the salt resistance of acrylic polymer water-absorbent resins. In this patent, inorganic substances such as

Method used

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  • Preparation method of salt-resistant water-absorbent resin with high water absorption rate
  • Preparation method of salt-resistant water-absorbent resin with high water absorption rate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of a salt-resistant water-absorbing resin with a high water absorption rate, the steps are as follows:

[0038] (1) Measure 50ml of water and add it to a four-neck bottle equipped with a stirrer, nitrogen pipe, vent pipe and thermometer, weigh 10.0g of monomer acrylic acid into the water, stir at room temperature until completely dissolved,

[0039] (2) Weigh 2.5g monomer 2-acrylamido-2-methylpropanesulfonic acid into the system prepared in step (1), stir at room temperature until completely dissolved,

[0040] (3) Add 0.2 g of nano-silica to the system prepared in step (2) and stir at room temperature until completely dissolved; use a pipette to measure 200 μl of N,N′-methylenebis Acrylamide solution was added to the above mixture,

[0041] (4) Use sodium hydroxide to adjust the neutralization degree of the system prepared in step (3) to 80%. Use a pipette to measure 500 μl of ammonium persulfate solution with a concentration of 1mol / L and add it ...

experiment example 1

[0046] The product of Example 1 was tested for its ability to absorb water and salt water for one minute.

[0047] One-minute water absorption test: Weigh 0.2g sample (accurate to 0.005g), put it into a 250-mesh 8×5cm seamless heat-sealed non-woven bag that has been weighed, and place it at the target temperature (30°C, 40°C, 50°C ℃, 60℃, 70℃) in pure water, hang the cloth bag after 60±1 seconds, let it drip freely for 10±1min, and measure the weight. The test results are shown in Table 1 and Table 2.

[0048] Table 1 One-minute water absorption capacity of the water-absorbent resin of Example 1

[0049] temperature(℃)

[0050] It can be seen from Table 1 that the water absorption of the water-absorbing resin of Example 1 in pure water first increases and then decreases with the increase of temperature, and then the water absorption remains stable with the increase of temperature. The water absorption capacity of the water-absorbent resin in one minute can reach up...

Embodiment 2

[0056] A preparation method of a salt-resistant water-absorbing resin with a high water absorption rate, as described in Example 1, the difference is:

[0057] The amount of monomer added, the amount of monomer acrylic acid added is 9.125g, the amount of monomer 2-acrylamido-2-methylpropanesulfonic acid added is 3.125g, and finally 11.9g of salt-resistant water-absorbing compound with high water absorption rate is obtained. resin powder.

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Abstract

The invention relates to a preparation method of salt-resistant water-absorbent resin with a high water absorption rate. The preparation method comprises the following step: copolymerizing monomers acrylic acid and 2-acrylamide-2-methyl propanesulfonic acid through a free radical polymerization method by taking water as a solvent, taking an ammonium persulfate and tetramethyl ethylenediamine redox system as an initiator, and taking N, N'-methylene bisacrylamide and nanosilicon dioxide as cross-linking agents to obtain the salt-resistant water-absorbent resin with the high water absorption rate. The salt-resistant water-absorbent resin with the high water absorption rate is applied to the fields such as agriculture, forestry, medicines, hygienic materials, buildings, daily-use chemical industry, food and environmental protection. According to the method disclosed by the invention, synthesis reaction conditions are mild, materials are easily available, cost is low, monomer conversation rate is high and product treatment is convenient. The prepared salt-resistant water-absorbent resin in high in water adsorption amount, and has a water-absorption multiple about 2000 times at most within 1 minute in pure water, and the water-absorption multiple of 1800 times at most within 1 minute in normal saline; besides, the resin has good adaptation for different application conditions, and is convenient to popularize and apply.

Description

technical field [0001] The invention relates to a preparation method of a salt-resistant water-absorbing resin with a high water-absorbing rate. Background technique [0002] Superabsorbent resin is a low-crosslinked or partially crystalline high-molecular polymer with many hydrophilic groups, so it has the characteristics of general high-molecular compounds, and has excellent water absorption and water retention properties. It can absorb up to The water, which is hundreds to thousands of times its own weight, forms a gel after absorbing water and swelling. It has a strong water retention capacity and rarely loses water under high pressure. At the same time, it has the advantages of functional polymer materials and can be used in agriculture, forestry, horticulture, medicine, medical treatment, physiological hygiene, petroleum, chemical industry, building materials, environmental protection, food, artificial intelligence materials, sensitive materials, biochemical technology...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F220/58C08F222/38C08F2/10C08F4/40C08K3/36C08J3/12
Inventor 谭业邦辛海鹏王小金
Owner SHANDONG UNIV
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