Efficient environment-friendly mulching film with weeding and deinsectization effects and preparation method thereof

Abstract

The invention provides an efficient environment-friendly mulching film with weeding and deinsectization effects and a preparation method of the mulching film. According to the preparation method, firstly, a herbicide and a deinsectization agent are mixed to prepare microcapsules, then the microcapsules are mixed with a biodegradable material, and film blowing processing is conducted to obtain themulching film, wherein the microcapsules are prepared by the following steps: taking rapeseed oil as an oil phase, mixing octenyl succinic anhydride modified starch and a sodium carboxymethyl cellulose aqueous solution to prepare a water phase, correspondingly adding the oil phase or the water phase according to the oil solubility or water solubility of herbicides and insecticides, conducting uniform stirring and mixing, finally conducting stirring and emulsifying, conducting homogenizing under high pressure, and conducting drying. The biodegradable material is prepared by modifying sludge powder with fresh corn stalk juice to obtain modified sludge powder, and then mixing the modified sludge powder with polyvinyl alcohol partially modified soybean meal and epoxy chloropropane for reaction. The mulching film has good weeding and deinsectization effects, and is biodegradable, safe and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of film materials, in particular to a high-efficiency and environment-friendly plastic film with weed-killing and insect-killing functions and a preparation method thereof. Background technique [0002] In recent years, in order to improve the growth environment of crops and increase crop yields, ground covering mulches with high thermal insulation and moisturizing properties have been used in agricultural production. On the one hand, most of the existing plastic mulches are not naturally degradable, causing extremely serious environmental pollution. On the other hand, after the crops are cultivated using the mulching technology, a relatively high-temperature and high-humidity ecological environment is formed under the film, which is conducive to the germination of crops. growth, so it can increase crop yield and harvest, but at the same time, this high-temperature and high-humidity ecological environment is...

AI Technical Summary

Problems solved by technology

[0004] Patent application CN102888040A discloses that herbicides are directly mixed with polymer resins and then blow-molded to prepare herbicide mulches. The herbicide mulch prepared by this method has problems such as uneven dispersion of herbicides, high processing difficulty and low production efficiency.

[0005] In addition, the anti-pest effect of traditional mulch film is not very good. At present, most of the mulch films used in agriculture for pest control are reflective agricultural films, which are films made by adhering aluminum or zinc ions to polyethylene. It looks like PE. The film is coated with a layer of aluminum foil, so it can reflect ultraviolet light under the sunlight, and insects will avoid it after receiving the ultraviolet light, so as to achieve the effect of insect pest prevention

However, by adhering to metallic substances, it is difficult to degrade and pollute the environment

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