Degraded mulch film containing nanometer level TiO2 photocatalysis, water, oxidation and biological degradation technologies

Abstract

The invention provides a degraded mulch film containing nanometer level TiO2 photocatalysis, water, oxidation and biological degradation technologies, and relates to an agricultural mulch film. The mulch film is mixed from aliphatic polyester, polylactic acid, starch / polyvinyl alcohol, a modified plant straw, a film forming agent and a surfactant, and the mulch film comprises three layers, the mulch film middle layer contains the nanometer level TiO2 photocatalyst and a hydrolytic agent which are mixed in proportion; the upper layer is sprayed with a paint containing an oxidation degradation agent; the mulch film lower layer is sprayed with a fertilizer, a microelement fertilizer, a pesticide and a herbicide or the like which are mixed in proportion and are needed by plant growth; The three-layer mulch film provided by the invention can decay and decompose by itself, integrates pesticide, fertilizer and pesticide without residual, and comprises nanometer level TiO2 photocatalysis, water, oxidation and biological degradation technologies. The invention has the advantages of wide raw material sources, low cost, various degradation modes and fast degradation speed, and is suitable for different crop growths.

Description

technical field [0001] The invention relates to a degradable plastic film, in particular to a nano-scale TiO 2 Photocatalytic, water, oxidation, biodegradable plastic film. Background technique [0002] Plastic film plays an important role in my country's agricultural production process. It not only has the functions of heat preservation, moisture retention and fertilizer preservation, but also has the functions of preventing diseases and insect pests, preventing drought and waterlogging, which can promote the growth and development of crops, effectively increase crop yield, and increase production. benefit. However, due to the difficulty of decomposing the plastic itself, the traditional mulch film has poor air permeability and water permeability, and difficulties in weeding and fertilization, which limit the use of mulch film and affect land productivity. The three-layer mulch film is a combination of itself that can be completely decomposed, and the upper and lower layer...

AI Technical Summary

Problems solved by technology

Chinese patent CN1277228 and patent application CN101828495A form, wherein the patent CN1277228 adopts the method of liquid spraying to be directly applied to the scene, so that some raw materials will be quickly absorbed by the surface soil layer, but because it is liquid, the functional components are easily unevenly distributed, and After the plastic film is discarded, there will still be a small amount of pesticides, fertilizers and other additives on the plastic film, which will cause land pollution to a certain extent, which is not conducive to environmental protection

And the patent application CN101828495A uses the upper layer of mulch as the matrix resin, and the lower layer is sprayed with micro-fertilizers, herbicides, degradation agents, etc., but only biodegradation is used, the degradation is slow, and the short-term effect is not obvious