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Multifunctional degradable liquid-state mulch film and its preparing method

A multi-functional, liquid mulching technology, applied in chemical instruments and methods, applications, organic fertilizers, etc., can solve the problems of low emulsion monomer concentration, difficult product transportation, and high asphalt cost, achieve low cost, improve crop survival rate, The effect of easy transportation

Active Publication Date: 2008-12-17
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patents CN1232857 and CN1415698 both disclose a kind of asphalt emulsion as a liquid mulch film. Because it contains a large amount of asphalt, the liquid mulch film will cause secondary pollution after use, and the cost of asphalt is high, so it is difficult to popularize
[0004] Chinese patent CN1445275 discloses a liquid film modified by polyvinyl alcohol, but the monomer concentration of the emulsion is low, which brings difficulties to product transportation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Disperse 10 grams of starch into 140 grams of water, stir and gelatinize at 85°C for 35 minutes, after cooling the gelatinized product, add 20 grams of acrylic acid, neutralize with 16 grams of potassium hydroxide, then add 14 grams of polyvinyl alcohol, persulfuric acid Ammonium 0.2 g, N, N-methylenebisacrylamide 0.06 g, sodium formate 1.2 g, and the resulting solution was polymerized at 45° C. with stirring and nitrogen for 3 hours to obtain a multifunctional degradable liquid. Its monomer concentration is 30%.

Embodiment 2

[0024] Disperse 8 grams of starch into 130 grams of water, stir and gelatinize at 70°C for 45 minutes, after cooling the gelatinized product, add 30 grams of acrylic acid, neutralize with 22 grams of sodium hydroxide, then add 10 grams of polyvinyl alcohol, persulfuric acid Potassium 0.3 g, N, N-methylenebisacrylamide 0.1 g, sodium formate 2 g, the resulting solution was stirred and polymerized at 50° C. under nitrogen for 5 hours to obtain a multifunctional degradable liquid. Its monomer concentration is 35%.

Embodiment 3

[0026] Disperse 16 grams of starch into 144 grams of water, stir and gelatinize at 90°C for 30 minutes, after cooling the gelatinized product, add 10 grams of acrylic acid, neutralize with 8 grams of potassium hydroxide, then add 20 grams of polyvinyl alcohol, persulfuric acid Ammonium 0.1 g, N, N-methylenebisacrylamide 0.02 g, sodium formate 1 g, and the resulting solution was stirred and polymerized under nitrogen at 55° C. for 4 hours to obtain a multifunctional degradable liquid. Its monomer concentration was 28%.

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Abstract

The invention relates to multifunction degradable pollutant liquid mulching film and its preparation method. It includes the following steps: using the degradability of the polyvinyl alcohol and starch, the water retention property of the acrylic acid polymer to synthesize starch group polymer; diluting by water to spray for forming. The mulching film has the advantages of convenient using, low cost, preventing water content from evaporating, degradable, wide application range such as agriculture production, forestation etc.

Description

technical field [0001] The invention relates to a liquid mulch film and a preparation method thereof, in particular to a multifunctional degradable liquid mulch film and a preparation method thereof. Background technique [0002] In agricultural production, in order to increase production and increase economic benefits, plastic mulch technology is widely used. However, due to the non-degradability of plastic mulch, extensive use has caused serious damage to the ecological environment. Therefore be badly in need of a kind of alternative that can replace plastic mulch film, does not produce ecological environment pollution simultaneously. [0003] Chinese patents CN1232857 and CN1415698 both disclose a kind of asphalt emulsion as a liquid mulch film. Because it contains a large amount of asphalt, the liquid mulch film will cause secondary pollution after use, and the cost of asphalt is high, so it is difficult to popularize. [0004] Chinese patent CN1445275 discloses a liqu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L51/02C08L51/06C09K17/52
Inventor 谭颖张文德王丕新岳玉梅苏雪峰徐昆
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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