Composite material for vegetation restoration and preparation method thereof

Abstract

The invention relates to a composite material for vegetation restoration and a preparation method thereof. The composite material comprises the following raw materials: 300-500 parts of polyether trihydric alcohol, 15-25 parts of water, 1-2 parts of triethanolamine, 5-8 parts of silicone oil, 0.4-0.6 part of organic tin, 150-250 parts of a slow release fertilizer, 50-80 parts of a water absorbing resin, and 180-300 parts of isocyanate. The preparation method of the composite material for vegetation restoration comprises the following steps: mixing polyether trihydric alcohol, triethanolamine, silicone oil, water and organic tin; adding isocyanate and carrying out a foam reaction; injecting into a mould and demolding to obtain a polyurethane initial foam carrier; mixing a slow release fertilizer with water absorbing resin, and then adding into the polyurethane initial foam carrier; pouring into a mould for fully foaming; curing for two hours; and stirring until the product is powdery, thus obtaining the composite material. The composite material disclosed by the invention has an obvious curing effect, is still intact after being scoured by heavy rain for 2 hours, and has high fertilizer effect and strong water absorptivity; and the free formaldehyde content of the composite material disclosed by the invention is low, therefore, the composite material does not cause pollution to the environment.

Description

technical field [0001] The invention belongs to a fertilizer processing technology, in particular to a vegetation recovery composite material with high fertilizer efficiency and better consolidation effect and a preparation method thereof. Background technique [0002] The growth of vegetation is closely related to the quality of the environment. In some areas, the land is not particularly fertile. Moreover, there are often heavy rains. Vegetation planted in such areas can easily affect its growth. When encountering heavy rains, it may appear that the heavy rains will destroy the soil. , the rainwater is likely to uproot the vegetation, and then the vegetation is washed away by the heavy rain. At present, sand-fixing and water-retaining vegetation composite materials are often used to avoid the above situation. The traditional sand-fixing and water-retaining composite materials in China are usually added with ordinary slow-release fertilizers. , the free formaldehyde content...

AI Technical Summary

Problems solved by technology

[0002] The growth of vegetation is closely related to the quality of the environment. In some areas, the land is not particularly fertile. Moreover, there are often heavy rains. Vegetation planted in such areas can easily affect its growth. When encountering heavy rains, it may appear that the heavy rains will destroy the soil. , the rainwater is likely to uproot the vegetation, and then the vegetation is washed away by the heavy rain. At present, sand-fixing and water-retaining vegetation composite materials are often used to avoid the above situation. The traditional sand-fixing and water-retaining composite materials in China are usually added with ordinary slow-release fertilizers. , the free formaldehyde content in the slow-release fertilizer is too high, which will pollute the environment and is not conducive to the absorption of plants. In addition, the traditional sand-fixing and water-retaining composite materials are washed for 10 minutes in heavy rains with a rain intensity of 75mm / 24h to 99.9mm / 24h After -25min, the formed consolidation layer will be destroyed and cannot achieve the effect of consolidation

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