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A kind of lignin-based environmental-friendly mulch film-forming liquid and its preparation method and mulch film

A lignin-based, film-forming liquid technology, applied in the direction of plant protection covers, can solve the problems of unsatisfactory results, high composite film strength, poor water resistance, etc., to solve the problems of poor soil, good mechanical properties and water resistance, and solve The Effects of White Pollution Problems

Inactive Publication Date: 2016-09-14
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As a base material to improve the mechanical properties of the film-forming fluid, PVA is usually directly used for compounding with lignin. The composite film formed in this way has high strength and poor water resistance. Science and Technology, 2014, Chen Fushan, Wang Shuai) In the article, although PVA was first reacted with glutaraldehyde and methyl phthalate to make a modified PVA glue, the final tensile strength of the film was 2.2KN / m, the water absorption rate of 35.2% is not ideal. Therefore, on this basis, the mechanical properties and water absorption rate of the film need to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Preparation of materials:

[0033] Take the solute raw material according to the following weight: lignosulfonate 7g, PVA7g, epichlorohydrin 6.4g, iron-free aluminum sulfate 6.4g, 40% (w / w) formaldehyde solution 10g, urea 7g, borax 0.5g;

[0034] Preparation of solution: Dissolve the weighed urea and borax in 10g of pure water respectively, and stir evenly to form a solution;

[0035] 2) In a water bath at 90°C, add the weighed PVA into 93g of pure water that has been raised to the set temperature and stir at a constant speed for 40 minutes to fully dissolve it, then cool down to 80°C, and add the weighed ring Oxychloropropane, stirred at a constant speed for 30 minutes to dissolve evenly, then added the weighed iron-free aluminum sulfate, and stirred at a constant speed for 30 minutes to prepare the PVA glue for use;

[0036] 3) Add weighed calcium lignosulfonate to the PVA glue prepared in 2) under the condition of 80°C water bath, then add 50g of pure water and s...

Embodiment 2

[0043] 1) Preparation of materials:

[0044] Weigh the solute raw materials according to the following weight: lignosulfonate 7.3g, PVA7.3g, epichlorohydrin 6.6g, iron-free aluminum sulfate 6.3g, 40% (w / w) formaldehyde solution 10g, urea 7.2g, borax 0.52g;

[0045] Preparation of solution: Dissolve the weighed urea and borax in 10g of pure water respectively, and stir evenly to form a solution;

[0046] 2) Under the condition of 90°C water bath, add the weighed PVA into 95g pure water which has been raised to the set temperature and stir at a constant speed for 40min to make it fully dissolve and evenly, then cool down to 80°C, add the weighed ring Oxychloropropane, stirred at a constant speed for 30 minutes to dissolve evenly, then added the weighed iron-free aluminum sulfate, and stirred at a constant speed for 30 minutes to prepare the PVA glue for use;

[0047] 3) Add weighed sodium lignosulfonate to the PVA glue prepared in 2) under the condition of 80°C water bath, the...

Embodiment 3

[0054] 1) Preparation of materials:

[0055] Weigh the solute raw materials according to the following weight: lignosulfonate 6.8g, PVA7g, epichlorohydrin 6.3g, iron-free aluminum sulfate 6.6g, 40% (w / w) formaldehyde solution 10.5g, urea 6.8g, borax 0.48 g;

[0056] Preparation of solution: Dissolve the weighed urea and borax in 10g of pure water respectively, and stir evenly to form a solution;

[0057] 2) Under the condition of 90°C water bath, add the weighed PVA into 90g pure water which has been raised to the set temperature and stir at a constant speed for 40min to make it fully dissolve and uniform, then cool down to 80°C, add the weighed ring Oxychloropropane, stirred at a constant speed for 30 minutes to dissolve evenly, then added the weighed iron-free aluminum sulfate, and stirred at a constant speed for 30 minutes to prepare the PVA glue for use;

[0058] 3) Add weighed calcium lignosulfonate to the PVA glue prepared in 2) under the condition of 80°C water bath, ...

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Abstract

The invention discloses a lignin-based environment-friendly mulching film forming liquid, a preparation method thereof and a mulching film and belongs to the technical field of lignin development and application. Solute of the mulching film forming liquid is composed of, by weight, 13-18 parts of lignosulfonate, 13-18 parts of PVA, 12-16 parts of epichlorohydrin, 12-16 parts of iron-free aluminum sulfate, 20-25 parts of 40% (w / w) formaldehyde solution, 13-18 parts of urea and 1-2 parts of borax, and solvent of the film forming liquid is water. The mulching film is obtained by spraying the film forming liquid after being diluted on a plane and air-drying. The lignin-based environment-friendly mulching film is good in mechanical performance and waterproofness and can replace existing plastic mulching films to be used in agricultural production. The mulching film has the characteristics of being degradable and usable after being degraded, so that the problems of soil infertility and white pollution caused by using of the plastic mulching films can be solved, and production of crops is facilitated.

Description

technical field [0001] The invention belongs to the technical field of lignin development and application, and in particular relates to a lignin-based environmental-friendly mulch film-forming liquid, a preparation method thereof and a mulch film. Background technique [0002] At present, under the trend of developing an environment-friendly society, the development trend of agricultural mulch is to eliminate plastic mulch and develop degradable environmental protection mulch with better water resistance. Humic acid multifunctional and degradable liquid mulch is widely used at home and abroad. It mainly uses lignite, weathered coal or peat to modify papermaking black liquor, seaweed waste liquor, brewing waste liquor or starch waste liquor. By adding lignin, Cellulose and polysaccharides are cross-linked under the action of cross-linking agents to form a polymer structure, and then mixed with various additives, silicon fertilizers, trace elements, pesticides and herbicides. ...

Claims

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Application Information

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IPC IPC(8): C08L97/00C08L29/04C08K5/1515C08K3/30C08K3/38C08J5/18A01G13/02
Inventor 陈夫山王帅宋晓明王新萍
Owner QINGDAO UNIV OF SCI & TECH
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