A kind of high-efficiency and environment-friendly mulch film with weed-killing and insect-killing effects and preparation method thereof

Abstract

The invention provides a high-efficiency environment-friendly plastic film with the functions of weeding and insecticide and its preparation method. In the invention, the herbicide and the insecticide are mixed to make microcapsules, and then the microcapsules are mixed with biodegradable materials, and the film is blown. , to obtain a kind of mulching film; wherein, the microcapsules are made by first using rapeseed oil as the oil phase, then mixing starch octenyl succinate and sodium carboxymethyl cellulose aqueous solution to form the water phase, and then according to the herbicide, The oil-soluble or water-soluble insecticides are obtained by adding them into the oil phase or water phase accordingly, stirring and mixing, and finally stirring and emulsifying, homogenizing under high pressure, and drying; biodegradable materials are obtained by using fresh corn stalk juice to process sludge powder The modified sludge powder is obtained through modification treatment, and then obtained by mixing and reacting the modified sludge powder with polyvinyl alcohol partially modified soybean meal and epichlorohydrin. The mulch film has a good effect of weed control and pest control, 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

Images