Water and soil conservation type degradable liquid mulching film and preparation and application thereof

A liquid mulch, soluble technology, applied in the field of agricultural and forestry applications, can solve the problems of the action time being restricted by external factors, the soil surface is easily damaged, and difficult to apply on a large scale, so as to inhibit the evaporation of soil moisture, enhance the soil moisture retention capacity, and improve the resistance to soil moisture. The effect of tensile strength

Active Publication Date: 2015-12-30
浙江敏轩农业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are many patents on the production of liquid mulch, but all of them have problems, such as CN1357569A, whose functional component is vinyl acetate solution, and CN1935878A, which uses acrylic acid as the main component, all of which are flammable, harmful to human health, and difficult to apply on a large scale ; CN101445731A, CN101007903 because the main components are humic acid or lignin, the film-forming effect is not good, and the action time is restricted by external factors
However, some existing products on the market also have many problems, such as poor film-forming properties, poor tensile strength, high moisture permeability, and easy damage on the soil surface, and are only suitable for flat land. It is not suitable for application in barren hills greening and afforestation

Method used

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  • Water and soil conservation type degradable liquid mulching film and preparation and application thereof
  • Water and soil conservation type degradable liquid mulching film and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Preparation of high tensile strength mulch film:

[0038] (1) Preparation of mixed aqueous solution of polyvinyl alcohol, wood calcium, and silica sol: add 300kg of water to the reaction kettle, and sequentially add 0.075kg of polyvinyl alcohol, 0.025kg of wood calcium, and 50ml of silica sol (30nm), set at 60r / min at 60°C Stir at constant temperature for 2 h, then cool down to room temperature to obtain a mixed solution.

[0039] (2) Preparation of liquid mulch film: Add 0.015kg polyacrylamide, 0.005kg soluble starch, 4.7ml Tween (80), 15.4ml glycerin, 0.005kg neutral black BL to the above mixed solution, and heat up to 80°C , stirring at 110r / min for 0.5h, a high tensile strength degradable liquid mulch can be obtained. Wherein, the tensile strength test data is shown in Table 1.

[0040] Table 1 Tensile Strength Test Results

[0041]

[0042] Note: The data test is based on GB13022-91, making dumbbell-shaped samples. The sample width is 15mm, the original gaug...

Embodiment 2

[0044] Preparation of low moisture permeability mulch:

[0045] (1) Preparation of mixed aqueous solution of polyvinyl alcohol, wood calcium, and silica sol: add 300kg of water to the reaction kettle, measure and add 0.063kg of polyvinyl alcohol, 0.027kg of wood calcium, and 33ml of silica sol (20nm) in sequence, set at 60r / min at 60°C Stir at constant temperature for 2 h, then cool down to room temperature to obtain a mixed solution.

[0046] (2) Preparation of liquid film: Add 0.015kg polyacrylamide, 0.005kg soluble starch, 4.7ml Tween (80), 15.7ml glycerin, 0.005kg black TBRN to the above mixed solution, heat up to 80°C, Stir at 110r / min for 0.75h to obtain a degradable liquid mulch film.

[0047] The film obtained above was subjected to the determination of the water vapor transmission coefficient (according to GB1037-88, using the quasi-cup method. Put 5g of anhydrous calcium chloride in the weighing bottle, seal the liquid film with paraffin on the mouth of the conical bo...

Embodiment 3

[0049] Preparation of composite liquid mulch film:

[0050] (1) Preparation of mixed aqueous solution of polyvinyl alcohol, wood calcium, and silica sol: add 300kg of water to the reaction kettle, add 0.050kg of polyvinyl alcohol, 0.048kg of wood calcium, and 50ml of silica sol (15nm) in sequence, and place at 55r / min at 60°C Stir at constant temperature for 2 h, then cool down to room temperature to obtain a mixed solution.

[0051] (2) Preparation of liquid mulch film: Add 0.015kg of polyacrylamide, 0.005kg of soluble starch, 4.7ml of Tween (80), 15.7ml of glycerin, 0.005kg of neutral black BL and black TBRN mixture into the above mixed solution , heated up to 80°C, stirred at 120r / min for 1h, and a degradable liquid mulch film could be obtained.

[0052] According to GB1037-88, the water vapor transmission coefficient of the film obtained above was measured by the pseudo-cup method, and the average result was 0.163g / m 2 d. The tensile strength test data are shown in Tabl...

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Abstract

The invention belongs to the field of agriculture and forestry application, and particularly relates to a water and soil conservation type degradable liquid mulching film and preparation and application thereof. The water and soil conservation type degradable liquid mulching film is specifically prepared from, by weight, 14%-16% of polyvinyl alcohol, 2%-4% of silica sol, 3%-10% of calcium lignosulphonate, 3%-5% of cross-linking agents, 1%-2% of defoaming agents, 1%-3% of soluble starch, 4%-5% of Twain (80), 1%-3% of glycerin, 1%-2% of blade dye and the balance water. According to the mulching film, the defects that an existing liquid mulching film on the market is poor in film-forming property and tensile strength, high in moisture permeability, prone to being damaged after being formed on the soil surface and unobvious in spraying effect are overcome; a liquid mulching film stock solution is diluted with water, fully stirred and then sprayed on the soil surface of planted land, the nanometer materials of the solution can effectively fill the binding positions of macromolecular hydrophilic groups and active sites on soil particles, and the surface-layer soil particles are bonded on the soil surface to form a black dense special soil film structure.

Description

technical field [0001] The invention belongs to the application field of agriculture and forestry, in particular to a soil and water conservation degradable liquid mulch film and its preparation and application. Background technique [0002] Different degrees of soil drought have different effects on afforestation and grass planting on slopes. Severe soil moisture deficit is an important factor limiting the normal growth and development of forest and grass in semi-arid areas. Surface covering can effectively inhibit the evaporation of soil moisture, maintain soil moisture, and benefit the growth and development of forest and grass. As a new type of biodegradable mulch, soil and water conservation liquid mulch can not only effectively maintain soil moisture, improve soil structure, and promote the growth of forest and grass, but also has the advantages of simple application, strong adaptability, and no pollution. etc. also have good effects. Therefore, the development and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/52C09K105/00
CPCY02A40/28
Inventor 尹光华周晓乐王维张成文宋国献邓首春孙仕军梁文举
Owner 浙江敏轩农业科技有限公司
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