Liquid fertilizing and water-retaining mulching film and preparation method thereof

A technology of liquid mulch and fertilizer, which is applied to fertilization devices, fertilizer mixtures, plant protection covers, etc., can solve problems such as poor film performance, reduce bulk density, solve soil compaction, and improve utilization.

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

AI Technical Summary

Problems solved by technology

[0008] In the prior art, the water retention, heat preservation and fertilizer retention performance of the liquid mulch film are generally poor compared with the plastic landform, and the film mainly plays the role of improving the soil.

Method used

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  • Liquid fertilizing and water-retaining mulching film and preparation method thereof
  • Liquid fertilizing and water-retaining mulching film and preparation method thereof
  • Liquid fertilizing and water-retaining 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 the protection of nitrogen, then add 2 g of 20 wt% superfine s...

Embodiment 2

[0048] Preparation of ultra-fine silica sol: After diluting and dissolving sodium silicate in water, ultrasonically oscillate for 10 minutes and mix evenly to form a water glass solution with a concentration of 25 wt%. 3 Mix to obtain composite resin; fully stir and mix the water glass solution and the composite exchange resin at a weight ratio of 40:1, remove impurities, and obtain a pretreated silicic acid solution; add alkali solution to the silicic acid solution, and adjust the pH value to 9, After heating and reacting at 85°C under normal pressure for 1 hour, the silica sol mother liquor was obtained; 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.

[0049] At room temperature, add 5 g of carboxymethyl cellulose to deionized water, stir until completely dissolved under nitrogen protection, then add 1 g of 20 wt% superfine silica sol solution ...

Embodiment 3

[0052] Preparation of ultra-fine silica sol: After diluting and dissolving sodium silicate in water, ultrasonically oscillate for 15 minutes and mix evenly to form a water glass solution with a concentration of 15 wt%. 2.5 Mix to obtain the composite resin; fully stir and mix the water glass solution and the composite exchange resin at a weight ratio of 30:1, remove impurities, and obtain a pretreated silicic acid solution; add alkali solution to the silicic acid solution, and adjust the pH value to 10, After heating and reacting at 80°C under normal pressure for 3 hours, the silica sol mother liquor was obtained; 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.

[0053] At room temperature, add 10 g of carboxymethyl cellulose to deionized water, stir until completely dissolved under nitrogen protection, then add 4 g of 20 wt % superfine silica sol...

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Abstract

The invention relates to a liquid fertilizing and water-retaining mulching film and a preparation method thereof and belongs to the technical field of agricultural production. The liquid mulching film comprises components in percentage by mass as follows: 1%-10% of a modified macromolecular composite polymer and 90%-99% of a fertilizing agent; the modified macromolecular composite polymer comprises components in parts by weight as follows: 35-45 parts of ultra-fine silica sol, 5-10 parts of zinc oxide, 40-100 parts of carboxymethylcellulose or hydroxypropyl methyl cellulose, 20-30 parts of N-isopropylacrylamide, 0.02-0.3 parts of a cross-linking agent and 0.4-1.2 parts of an initiator; the solid content of the ultra-fine silica sol is in a range of 10-30wt%, and particle sizes of silica in the ultra-fine silica sol are in a range of 1-100 nm. The prepared liquid mulching film can significantly increase the water-retention rate of soil and improve physical and chemical properties of the soil, can be completely degraded, is free of pollution and can substitute for plastic mulching films on a large scale.

Description

technical field [0001] The invention relates to an agricultural mulching film, in particular to a fertilizer-increasing and water-retaining liquid mulching film and a preparation method thereof. The mulching film is a high-molecular polymer composite liquid mulching film, which has the functions of water retention, fattening and degradability, and belongs to agricultural production technology field. Background technique [0002] Plastic mulch has the functions of heat preservation, water retention, and frost protection. The application of mulch technology has greatly improved and increased crop yields and benefits, and has changed human agricultural production methods and developed human agricultural productivity. In the 1970s, my country first introduced film mulching technology. As of 2005, the area covered by plastic mulch in my country has exceeded 100 million mu, and there are more than 50 kinds of cover crops, and it is still increasing at a rate of 10% every year. Ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/02C08F220/54C08F2/44C08K3/36C08K3/22C05G3/00A01G13/02
Inventor 申闫春
Owner CHANGZHOU GUOBO NEW MATERIAL TECH CO LTD
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