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Water-retention and sand-fixing liquid mulching film and preparation method thereof

A liquid mulch, water glass solution technology, applied in the direction of plant protection cover, etc., can solve the problems of lack of comprehensive performance of sand fixation and water retention, limitation of raw material sources, and high cost of mulch film, so as to improve repeated water absorption performance, improve water absorption and water retention performance, Improved effect of poor salt tolerance

Inactive Publication Date: 2015-07-29
JIAXING GUOXING NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mulching film of this invention has a high cost, and the source of raw materials is limited to a certain extent. In addition, when the material is diluted, it is easily emulsified when it encounters hard water, resulting in a decrease in film-forming properties.
[0009] In the prior art, the film performance of liquid mulch is generally poor, especially the dry and wet strength, stretchability, and crack resistance of the mulch. After rain, the liquid mulch is easy to break, the film quality is thicker, and the pores of the film are larger. Water retention and thermal insulation are poor, and the performance of sand fixation and water retention is not comprehensively reflected

Method used

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  • Water-retention and sand-fixing liquid mulching film and preparation method thereof
  • Water-retention and sand-fixing liquid mulching film and preparation method thereof
  • Water-retention and sand-fixing liquid mulching film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Preparation of ultrafine silica sol: After diluting and dissolving sodium silicate in water, ultrasonically oscillate for 20 minutes and mix evenly to form a water glass solution with a concentration of 30wt%. 2 Mix to obtain composite resin; fully stir and mix the water glass solution and the composite exchange resin according to the weight ratio of 20:1, remove impurities, and obtain a pretreated silicic acid solution; add alkali solution to the silicic acid solution, and adjust the pH value to 9.5, The silica sol mother liquor was obtained after heating and reacting at 70°C under normal pressure for 2 hours; the silica sol mother liquor was dehydrated, concentrated and purified to prepare a silica sol with a concentration of 20 wt%, wherein the silica particle size was between 1-100nm.

[0045] At room temperature, add 4 g of carboxymethyl cellulose to deionized water, stir until completely dissolved under nitrogen protection, then add 2 g of ultrafine silica sol solu...

Embodiment 2

[0047] At room temperature, add 3 g of carboxymethyl cellulose to deionized water, stir until completely dissolved under nitrogen protection, then add 1.5 g of 20 wt% superfine silica sol solution and 0.05 g of ferrocene to form a sol liquid; then add 2g of N-isopropylacrylamide monomer, heated to 40°C under nitrogen atmosphere, stirred and dissolved for about 25min; adjusted the pH value to 8.5 with NaOH solution, added 0.05g of potassium persulfate and 0.05g of anhydrous sodium sulfite in sequence Aqueous solution, containing 0.02g cross-linking agent N,N-methylenebisacrylamide aqueous solution, accelerated stirring, after 3.5h heat preservation reaction, cooled to room temperature to obtain a gel; the gel was prepared into an aqueous solution with a concentration of 5wt%, and used After acetone precipitates and separates the polymer, it is dried in a vacuum oven at a drying temperature of 60° C. to obtain the super absorbent of the present invention.

Embodiment 3

[0049] At room temperature, add 10 g of carboxymethyl cellulose to deionized water, stir until completely dissolved under the protection of nitrogen, then add 4 g of 20 wt % superfine silica sol solution and 0.1 g of ferrocene to form a sol liquid; then add 6 g of N -Isopropylacrylamide monomer, under nitrogen atmosphere, heat to 30°C, stir and dissolve for about 30min; adjust the pH value to 9.5 with NaOH solution, add 0.05g potassium persulfate and 0.05g anhydrous sodium sulfite aqueous solution in sequence , containing 0.06g of cross-linking agent N, N-methylenebisacrylamide aqueous solution, accelerated stirring, after 3 hours of heat preservation reaction, cooled to room temperature to obtain a gel; the gel was formulated into an aqueous solution with a concentration of 5wt%, and acetone was added to After the polymer is precipitated and separated, it is dried in a vacuum drying oven at a drying temperature of 60° C. to obtain the superabsorbent of the present invention. ...

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Abstract

The invention relates to a water-retention and sand-fixing liquid mulching film and a preparation method thereof, and belongs to the technical field of agricultural production. The liquid mulching film comprises components in parts by weight as follows: 30-50 parts of ultrafine silica sol or nano-silica, 40-100 parts of carboxymethyl cellulose, 20-30 parts of N-isopropylacrylamide, 1-5 parts of ferrocene, 0.02-0.3 parts of a cross-linking agent and 0.4-1.2 parts of an initiator, wherein the solid content of the ultrafine silica sol is 10wt%-30wt%, and the particle size of silica is 1-100 nm. The liquid mulching film forms colloid easily with water, soil particles can be connected, structureless and dispersed sand soil is connected to form an elastic stable object, and a net-shaped film with good film performance and high strength is formed; one the one hand, surface pores of soil can be sealed, and soil moisture volatilization is blocked; on the other hand, moisture permeation is not inhibited, good water retention, soil moisture preservation and sand fixing functions are realized, and the performance of a desert and dry soil is improved effectively.

Description

technical field [0001] The invention relates to a liquid plastic film for arid soils and deserts, in particular to a water-retaining and sand-fixing liquid plastic film and a preparation method thereof. Efficacy belongs to the field of agricultural production technology. Background technique [0002] my country is one of the countries with the most severe desertification in the world, with an area of ​​more than 400,000 square kilometers of desertified land. Moreover, the desertified area in some places continues to expand. Desertification not only destroys land resources and further reduces valuable arable land and grassland, but also brings serious environmental problems and seriously threatens the living space of human beings. With the promotion of the country's western development strategy and the increase of infrastructure construction in desert areas, people's requirements for sand prevention and control and improvement of the ecological environment are becoming stro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/02C08F220/54C08F2/44C08K9/04C08K3/36C08L51/02A01G13/02
Inventor 朱红
Owner JIAXING GUOXING NEW MATERIAL TECH CO LTD
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