Preparation method for foaming type nutrient composite water-retaining agent

A water-retaining agent and foaming technology, applied in chemical instruments and methods, fertilizer mixtures, organic fertilizers, etc., can solve the problems of industrial production, consumption, and non-use, and achieve good water absorption performance and gel strength.

Active Publication Date: 2012-06-13
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example: Chinese patent (CN 101143957A) discloses an acid heat treatment attapulgite composite water-retaining agent and its preparation method. The disadvantage is that the heat treatment temperature of attapulgite should reach hundreds of degrees, which requires harsh reaction conditions and does not use industrial production.
[0005]2. Waste plant straw additives: This type of water-absorbing resin is added with modified plant straw, mainly including wheat straw, corn bracts, corn straw, sorghum straw, Sugarcane waste, potato stalks, etc., but all such water-retaining agents reported so far have been subjected to alkali treatm

Method used

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  • Preparation method for foaming type nutrient composite water-retaining agent
  • Preparation method for foaming type nutrient composite water-retaining agent
  • Preparation method for foaming type nutrient composite water-retaining agent

Examples

Experimental program
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Effect test

Embodiment 1

[0050] Accurately weigh 5 g of plant ash and add it to a three-necked flask containing 100 ml of distilled water. Under the protection of nitrogen, heat the oil bath to 65℃ for gelatinization for 20 min, then cool to 55℃, add 0.15g initiator potassium peroxodisulfate, and stir for 10 After min, adjust the reaction temperature to 95℃, add 10g acrylamide, 2.5g palygorskite clay ore (montmorillonite-type palygorskite) and 0.035g crosslinking agent (N,N′-methylenebisacrylamide) After reacting for about 30 minutes, 0.25 g of ammonium bicarbonate was added to the reaction system for foaming polymerization, 150ml of 1mol / L mixed solution (sodium hydroxide and potassium hydroxide) was saponified at 75°C for 40 minutes, and then the crosslinked product was taken out. Washing with anhydrous methanol, drying, and pulverizing to obtain a foaming nutritional composite water retaining agent.

[0051] The composite material obtained by this formula: absorbent distilled water 720 g / g; tap water ...

Embodiment 2

[0053] Accurately weigh 5 g of plant ash and add it to a three-necked flask containing 100 ml of distilled water. Under the protection of nitrogen, heat the oil bath to 70 ℃ for gelatinization for 30 min, then cool to 60 ℃, add 0.20 g of initiator potassium peroxodisulfate, and stir for 10 After min, adjust the reaction temperature to 95℃, add 15 g acrylamide, 3.5 g palygorskite clay ore (dolomite-type palygorskite clay ore) and 0.040 g crosslinking agent (polyethylene glycol bismaleate), After reacting for about 40 minutes, 0.35 g of azoformamide was added to the reaction system for foaming polymerization, 150ml of 1mol / L mixed solution (sodium hydroxide and potassium hydroxide) was saponified at 80 ℃ for 45 minutes, and then the crosslinked product was taken out. Washing with anhydrous methanol, drying, and pulverizing to obtain a foaming nutritional composite water retaining agent.

[0054] The composite material obtained by this formula: water-absorbent distilled water 725 g / ...

Embodiment 3

[0056] Accurately weigh 5 g of plant ash and add it to a three-necked flask containing 100 ml of distilled water. Under the protection of nitrogen, heat the oil bath to 75 ℃ for gelatinization for 40 min, then cool to 65 ℃, add 0.25 g of initiator potassium peroxodisulfate, and stir for 12 After min, adjust the reaction temperature to 95℃, add 20g acrylamide, 4.5g palygorskite clay ore (siliceous palygorskite clay ore) and 0.045g crosslinking agent (N,N′-methylenebisacrylamide), After reacting for about 35 minutes, 0.45 g of ammonium bicarbonate was added to the reaction system for foaming polymerization, 150ml of 1mol / L mixed solution (sodium hydroxide and potassium hydroxide) was saponified at 85 ℃ for 50 minutes, and then the crosslinked product was taken out. Washing with methanol, drying and pulverizing to obtain a foaming nutritional composite water retaining agent.

[0057] The composite material obtained by this formula: absorbent distilled water 734 g / g; tap water 190g / g...

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Abstract

The invention provides a preparation method for a foaming type nutrient composite water-retaining agent and belongs to the field of composite materials. Plant ash, acrylamide and palygorskite clay rude ore are adopted as raw materials, potassium persulfate is adopted as an initiating agent, N,N'-methylene-bisacrylamide and the like are adopted as cross-linking agents, ammonium bicarbonate is adopted as a foaming agent, the copolymerization of an aqueous solution is initiated through a free radical to obtain the composite water-retaining agent which has the effects of high water absorption velocity, large water absorption capacity, long water retaining time, good salinity tolerance and high gel strength. Through the addition of the natural fertilizer plant ash, the water-retaining agent isendowed with the advantage of being rich in nutrient elements, thereby being more suitable for the fields of crop planting and desertification environment remediation. The palygorskite clay rude ore is adopted as the main raw material, the addition of inorganic substances is high, so as to greatly reduce the cost of the water-retaining agent; besides, the preparation technology of the composite water-retaining agent is simple, the operation is convenient, and industrialization is facilitated.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to the preparation of a composite water-retaining agent, in particular to a preparation method of a foaming nutritional composite water-retaining agent. Background technique [0002] Since the relevant application information of water-absorbing composite materials was reported by the Northern Research Institute of the United States in the early 1970s, water-absorbing composite materials have attracted great research interest from researchers, and their applications include industry, horticulture, agriculture, food industry, healthcare and other fields. Among them, the application of water-absorbing composite materials in agriculture has shown encouraging experimental results. Water-absorbing composite materials can help reduce irrigation times, save water resources, increase plant survival rates, and improve soil fertility. At present, water-retaining agents can be divide...

Claims

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Application Information

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IPC IPC(8): C08F120/56C08K3/34C08J9/04C09K17/40
Inventor 张哲沈智李芳红崇雅丽杨艳何海涛杨志旺马恒昌雷自强
Owner NORTHWEST NORMAL UNIVERSITY
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