A kind of preparation method of natural mineral fiber/plant fiber degradable agricultural mulch film

A technology of natural minerals and plant fibers, which is applied in the addition of natural cellulose pulp/paper, inorganic fibers/sheets, and non-fiber pulp, etc., can solve the problems of limited reserves, high cost, and high raw material cost, and achieve low production costs and reduced production costs. The effect of cutting down and saving consumption

Active Publication Date: 2022-07-08
LIUPANSHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Bio-based plastic mulch can reduce the consumption of traditional petrochemical energy such as petroleum, but the cost of raw materials is high; petroleum-based plastic mulch has low cost of raw materials, but relies on non-renewable petrochemical energy
Due to the limited reserves or high cost of raw material sources, the above two kinds of film materials have limited their application in the agricultural field. Therefore, the development of cheap, easy-to-obtain, abundant sources, and environmentally non-toxic raw materials for plastic film is the key way to prepare agricultural plastic film.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: the preparation method of this natural mineral fiber / plant fiber degradable agricultural mulch film is as follows:

[0036] (1) Cut the basalt fiber into 0.5mm short fibers;

[0037] (2) The short fibers in step (1) were treated with sodium hydroxide solution with a concentration of 1 mol / L and an oxalic acid solution with a concentration of 1.5 mol / L in sequence at 60 °C with 80 kHz and 400 W ultrasonic treatment for 60 min for surface modification. The mass ratio of short fiber: sodium hydroxide solution or oxalic acid solution is 1:20;

[0038] (3) Add the modified mineral fiber in step (2) to a solution of sodium polyphosphate with a mass concentration of 0.5%, and mechanically stir it for 120 min at 40 ° C to obtain a uniformly dispersed mineral fiber dispersion, in which the dry modified fiber and The mass ratio of dispersant solution is 1:60;

[0039] (4) Chop a commercially available eucalyptus pulp board into 0.3×1 cm 2 The pieces of eucalyptus...

Embodiment 2

[0050] Embodiment 2: The preparation method of this natural mineral fiber / plant fiber degradable agricultural mulch film is as follows:

[0051] (1) Cut the aluminum silicate fiber into short fibers of 1mm;

[0052] (2) The short fibers were treated with 0.5 mol / L potassium hydroxide solution and 0.5 mol / L hydrochloric acid solution for 120 min respectively at 40 °C with 80 kHz and 600 W ultrasonic treatment for surface modification. The mass ratio of potassium solution or hydrochloric acid solution is 1:40;

[0053] (3) Add the modified mineral fiber in step (2) to a solution of diammonium hydrogen phosphate with a mass concentration of 1.0%, and mechanically stir it for 60 min at 60 °C to obtain a uniformly dispersed mineral fiber dispersion, in which the dry modification is performed. The mass ratio of mineral fiber to dispersant solution is 1:80;

[0054] (4) Chop the commercially available Simao pine pulp board into 0.3×1cm 2 put the fragments into the sodium hydroxide...

Embodiment 3

[0065] Embodiment 3: The preparation method of this natural mineral fiber / plant fiber degradable agricultural mulch film is as follows:

[0066] (1) Cut the sepiolite fibers into 3mm short fibers;

[0067] (2) The short fibers were surface-modified with 1.0 mol / L sodium hydroxide solution and 0.5 mol / L sulfuric acid solution at 80°C for 70 min with 80 kHz and 300 W ultrasonics respectively, and the short fibers were absolutely dry: The mass ratio of sodium hydroxide solution or sulfuric acid solution is 1:30;

[0068] (3) Add the modified mineral fiber in step (2) into a sodium pyrophosphate solution with a mass concentration of 1.2%, and mechanically stir it at 60 ° C for 35 minutes to obtain a uniformly dispersed mineral fiber dispersion, in which the dry modified mineral fiber and The mass ratio of dispersant solution is 1:30;

[0069] (4) Chop the commercially available wheat straw pulp board into 0.3×1 cm 2 put the fragments into the sodium hydroxide-urea aqueous solut...

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Abstract

The invention discloses a method for preparing a natural mineral fiber / plant fiber degradable agricultural mulching film. The natural mineral fiber is surface-modified and then mixed with natural plant fibers to prepare a degradable agricultural composite mulching film by a wet papermaking process, which is used for preparing the agricultural mulching film. The raw materials are environmentally harmless and biodegradable natural mineral fibers and plant fibers. The obtained agricultural film has both the hardness and rigidity of mineral fibers and the flexibility and toughness of plant fibers. Its mechanical properties are better than those of pure plants without mineral fibers. The fiber mulch film is increased by 15% to 50%; the invention not only solves the limited source of degradable agricultural mulch film raw materials and the production limitation of high cost, but also saves the amount of plant fiber and reduces the felling of forest trees.

Description

technical field [0001] The invention belongs to the technical field of agricultural mulching films, and particularly relates to a degradable agricultural mulching film prepared by compounding natural mineral fibers and plant fibers with a wet papermaking process. Background technique [0002] The raw materials of plastic mulch are mainly polyethylene (PE), polyvinyl chloride (PVC), polypropylene (PP) and other refractory polymer compounds. After use, the residual film can remain in the soil environment for 200 to 400 years, destroying the soil ecosystem and causing Crop yields decreased. Therefore, the development of a degradable mulch film with no toxic and side effects to the environment has become a research hotspot in this field. [0003] At present, degradable plastic mulch can be divided into bio-based degradable plastic mulch and petroleum-based degradable plastic mulch according to raw materials. Bio-based degradable plastic mulch is a plastic mulch produced from b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H27/00D21H13/38D21H13/36D21H11/00D21H17/66D21H21/08D21H17/36D21H17/53D21H17/26D21H19/10
CPCD21H27/00D21H13/38D21H13/36D21H11/00D21H17/66D21H21/08D21H17/36D21H17/53D21H17/26D21H19/10Y02A40/28
Inventor 缪应菊吴红连明磊李琳
Owner LIUPANSHUI NORMAL UNIV
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