Substrate water retaining agent and preparation method thereof

A technology of water-retaining agent and matrix, which is applied in the fields of agriculture and forestry. It can solve the problems of slow degradability, poor water-retaining capacity, and high cost of polymer compounds, and achieve the effects of improving physical and chemical properties, long water-retaining time, and moderate pH

Inactive Publication Date: 2012-07-11
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a matrix water-retaining agent and its preparation method in view of the defects in the prior art. The environmental-friendly water-retaining agent prepared by the present invention from natural, pollution-free, widely sourced and easily degradable raw materials has a water absorption capacity of Strong, high water retention efficiency, using the water retention agent of the present invention can replace the water retention agent of expensive polymer compounds, and solve the problem of poor water retention capacity of cultivation substrates (peat, peat, soil) in agricultural and forestry production and flower cultivation, and commonly used polymer compounds Problems such as slow degradability and high cost

Method used

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  • Substrate water retaining agent and preparation method thereof
  • Substrate water retaining agent and preparation method thereof
  • Substrate water retaining agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] 1. Prepare raw materials according to the following weight

[0059] Sodium Carboxymethyl Cellulose 200g

[0060] β-cyclodextrin 200g

[0061] Soluble starch 200g

[0062]

[0063] 2. Add the additive soluble starch, binder β-cyclodextrin and sodium carboxymethyl cellulose to 4020 g of water, mix well, and make a pretreatment mixture, wherein the total weight of the additive and the binder is equal to the weight of the water The weight ratio is 1: 6.7, the weight ratio of β-cyclodextrin and carboxymethyl cellulose sodium in the binder is 1: 1, and the ratio of the total weight of additives to the total weight of the binder is 1: 2;

[0064] 3. Heat the uniformly mixed pretreatment mixture and stir evenly. The heating temperature is 60°C and heat treatment for 15 minutes, so that sodium carboxymethylcellulose and β-cyclodextrin are dispersed in water, and the soluble starch is completely gelatinized. form a colloidal mixture;

[0065] 4. Put the colloidal mixture i...

Embodiment 2

[0067] 1. Prepare raw materials according to the following weight:

[0068] Sodium Carboxymethyl Cellulose 285.7g

[0069] β-cyclodextrin 571.4g

[0070] Bamboo Charcoal Powder 192.9g

[0071]

[0072] Among them, the particle size of bamboo charcoal powder is 0.25-0.5mm;

[0073] 2. Add the additive bamboo charcoal powder and the binder β-cyclodextrin and sodium carboxymethylcellulose into water with a weight of 1700g, mix well, and make a pretreatment mixture, wherein the total weight of the additive and the binder is equal to that of the water The weight ratio is 1: 1.6, the weight ratio of β-cyclodextrin and carboxymethyl cellulose sodium in the binder is 2: 1; the ratio of the total weight of additives to the total weight of the binder is 1: 4.4;

[0074] 3. Heat the uniformly mixed pretreatment mixture and stir evenly. The heating temperature is 65°C and heat treatment for 10 minutes to disperse sodium carboxymethyl cellulose, β-cyclodextrin and bamboo charcoal pow...

Embodiment 3

[0077] 1. Prepare raw materials according to the following weight:

[0078]

[0079] Among them, the particle size of bamboo charcoal powder is less than 0.25mm.

[0080] 2. Add additives soluble starch, bamboo charcoal powder, binders β-cyclodextrin and sodium carboxymethyl cellulose to water with a weight of 1200g, mix well, and make a pretreatment mixture, wherein the total weight of additives and binders The weight ratio with water is 1:12, the weight ratio of β-cyclodextrin and sodium carboxymethyl cellulose in the binder is 1:1; the ratio of the total weight of additives to the total weight of binder is 1: 1.6;

[0081] 3. Heat the uniformly mixed pretreatment mixture and stir evenly. The heating temperature is 65°C, heat treatment for 20 minutes, disperse sodium carboxymethylcellulose, β-cyclodextrin, and bamboo charcoal powder in water, and soluble starch paste Completely melted to form a colloidal mixture;

[0082] 4. Put the colloidal mixture in an oven for dry...

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Abstract

The invention discloses a composite substrate water retaining agent. The water retaining agent comprises an additive and an adhesive, wherein the additive comprises soluble starch, bamboo charcoal powder or corncob pyrolysis powder; and the adhesive is beta-cyclodextrin and sodium carboxymethyl cellulose. The environment-friendly substrate water retaining agent is prepared from raw materials which are natural, pollution-free, wide in source and easy to degrade, has high water absorbing capacity and water retaining efficiency, can replace an expensive high molecular compound water retaining agent, and solves the problems that culture substrates (such as peat, turf and soil) in agriculture and forestry production and floriculture have low water retaining capacity, the common high molecular compound is low in degradation rate and high in cost, and the like.

Description

technical field [0001] The invention relates to a water-absorbing moisturizing agent of an environment-friendly material and a preparation method thereof, in particular to a water-retaining agent of a plant cultivation substrate and a preparation method thereof, and is suitable for the fields of agriculture and forestry. Background technique [0002] Water retaining agent (Water retaining agent) is a chemical water-saving, high-tech drought-resistant product that has developed rapidly in recent years. It has been gradually applied to the production of flowers, seedlings and crops. The water retaining agent has the characteristics of fast absorption and slow release of water, which can reduce the surface water of the cultivation substrate and the evaporation of substrate water. That is to say, during the watering process, the water-retaining agent can store the gravitational water that cannot be continuously used by the plants, effectively increase the water holding capacity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/16C08L1/28C08L3/02C08K3/04C09K17/32C09K17/40A01G1/00C09K101/00
Inventor 孙向阳田赟张璐龚小强曹吉鑫
Owner BEIJING FORESTRY UNIVERSITY
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