Degradable moisture retention mulching film and method for preparing same

Abstract

The invention discloses a degradable moisture retention mulching film and a method for preparing the same. Raw materials for the degradable moisture retention mulching film include chitosan, acrylamide, sulfanilic acid, aluminum oxide, tetrahydrofuran, polylactic acid, polyvinyl alcohol, polycaprolactone, polyethylene glycol, petroleum ether, low-density polyethylene, dodeca-carbon alcohol ester,traditional Chinese medicine extract liquid and nanometer titanium dioxide. The method includes steps of 1), preparing modified chitosan; 2), preparing modified polylactic acid; 3), adding the low-density polyethylene into the petroleum ether, stirring and dissolving the low-density polyethylene in the petroleum ether, then adding the dodeca-carbon alcohol ester and the modified polylactic acid into the petroleum ether, and carrying out heating reaction to obtain film coating liquid A; 4), adding the traditional Chinese medicine extract liquid and the nanometer titanium dioxide into distilledwater, adding the modified chitosan and the film coating liquid A into the distilled water, stirring the modified chitosan and the film coating liquid A to obtain film coating liquid B, manufacturinga layer of films on a smooth glass plate from the film coating liquid B by means of culturing and drying the films to obtain the degradable moisture retention mulching film. The degradable moisture retention mulching film and the method have the advantages that the degradable moisture retention mulching film prepared by the aid of the method is excellent in water absorption, moisture retention andbiodegradability, and environmental pollution can be prevented.

Description

technical field [0001] The invention belongs to the technical field of agricultural planting, and in particular relates to a degradable moisturizing film and a preparation method thereof. Background technique [0002] Mulch film is a ground covering film, usually a transparent or black film, used for ground covering to maintain soil moisture, maintain soil structure, prevent pests from invading crops and diseases caused by certain microorganisms, etc., and promote plant growth. [0003] The mulch film looks thin, but it has a considerable effect. It can reduce the impact of raindrops, prevent erosion and crust formation, effectively reduce the evaporation of soil moisture, protect moisture in drought, increase moisture after rain, and promote the absorption of water by crops. And growth and development, improve soil water use efficiency. It can keep the soil at a suitable temperature and humidity, make the ground temperature drop slowly and last for a long time, which is co...

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Problems solved by technology

[0004] At present, my country's plastic film coverage area and plastic film usage rank first in the world. The existence of a large amount of residual film hinders the transportation of soil moisture and nutrients, resulting in malnutrition of crops and a decline in yield, resulting in reduced production of crops. Moreover, the existing plastic film absorbs water. Poor performance and moisture retention, unable to absorb the water evaporated from the soil and circulate it to the soil

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